Pub Date : 2013-02-17DOI: 10.3724/SP.J.1140.2012.06079
S. Cheng, Li Sanzhong, Y. Suo, Xin Liu, Shan Yu, L. Dai, Yun Ma, Shujuan Zhao, Xiaofei Wang, Huiting An, Lijuan Xiong, Y. Xue
There are a lot of Cenozoic basins from west to east in the northern margin of the South China Sea,including the Beibu Gulf,the Qiongdongnan,the Pearl River Mouth and the Taixinan basins.Previous studies suggested that these basins are derived gradually during the rifting of the southeast continental margin of the South China Block and the formation of the northern passive margin of the South China Sea.However,a large number of seismic profiles revealed that some major basin-controlling faults in the northern margin of the South China Sea are landward-dipping,which are clearly inconsistent with the major seaward dipping faults of a typical passive continental margin basin.Thus,the Mckenzie's extension model of passive continental margin remains controversial for the formation mechanism of the northern marginal basins of the South China Sea.This article,based on the comparison between a large number of field observation and marine seismic data,reveals that the northern continental margin of the South China Sea is not a passive continental margin before 34Ma.The early faults were well developed in NE—NNE-striking,corresponding to the strike-slipping faults in the southeast South China.These dextral,right-step strike-slipping faults are NE—NNE striking,controlling the secondary faults with near-EW or NEE strikes and the distribution of tectonic units in the pull-apart basins.Therefore,a series of Cenozoic basins in the northern margin of the South China Sea is dextral,right-step pull-apart basin group,having close relation in dynamics.This pull-apart model is consistent with the migration of sedimentary-subsidence centers and depocenters,tectonic jumping and magmatic migration within Cenozoic basins.The northern continental margin of the South China Sea actually became a typical passive continental margin since 15 Ma,when the South China Sea oceanic crust terminated spreading.At last,all structures in the northern continental margin of the South China Sea are offset by the late,diffusive NWW-striking faults resulting from the gradual indentation of the Philippines Plate to the Eurasian Plate along the Luzon Arc and the Taiwan Orogenic Belt between 10 Ma and about 5 Ma.Basin dynamics in northern continental margin of the South China Sea is mainly related to the dynamics of the Pacific Plate.
{"title":"Cenozoic Tectonics and Dynamics of Basin Groups of the Northern South China Sea","authors":"S. Cheng, Li Sanzhong, Y. Suo, Xin Liu, Shan Yu, L. Dai, Yun Ma, Shujuan Zhao, Xiaofei Wang, Huiting An, Lijuan Xiong, Y. Xue","doi":"10.3724/SP.J.1140.2012.06079","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.06079","url":null,"abstract":"There are a lot of Cenozoic basins from west to east in the northern margin of the South China Sea,including the Beibu Gulf,the Qiongdongnan,the Pearl River Mouth and the Taixinan basins.Previous studies suggested that these basins are derived gradually during the rifting of the southeast continental margin of the South China Block and the formation of the northern passive margin of the South China Sea.However,a large number of seismic profiles revealed that some major basin-controlling faults in the northern margin of the South China Sea are landward-dipping,which are clearly inconsistent with the major seaward dipping faults of a typical passive continental margin basin.Thus,the Mckenzie's extension model of passive continental margin remains controversial for the formation mechanism of the northern marginal basins of the South China Sea.This article,based on the comparison between a large number of field observation and marine seismic data,reveals that the northern continental margin of the South China Sea is not a passive continental margin before 34Ma.The early faults were well developed in NE—NNE-striking,corresponding to the strike-slipping faults in the southeast South China.These dextral,right-step strike-slipping faults are NE—NNE striking,controlling the secondary faults with near-EW or NEE strikes and the distribution of tectonic units in the pull-apart basins.Therefore,a series of Cenozoic basins in the northern margin of the South China Sea is dextral,right-step pull-apart basin group,having close relation in dynamics.This pull-apart model is consistent with the migration of sedimentary-subsidence centers and depocenters,tectonic jumping and magmatic migration within Cenozoic basins.The northern continental margin of the South China Sea actually became a typical passive continental margin since 15 Ma,when the South China Sea oceanic crust terminated spreading.At last,all structures in the northern continental margin of the South China Sea are offset by the late,diffusive NWW-striking faults resulting from the gradual indentation of the Philippines Plate to the Eurasian Plate along the Luzon Arc and the Taiwan Orogenic Belt between 10 Ma and about 5 Ma.Basin dynamics in northern continental margin of the South China Sea is mainly related to the dynamics of the Pacific Plate.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"79-93"},"PeriodicalIF":0.0,"publicationDate":"2013-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-17DOI: 10.3724/SP.J.1140.2012.06129
Y. Xue, Li Sanzhong, Xin Liu, Y. Suo, L. Dai, Shan Yu, Shujuan Zhao, Pengcheng Wang, Lijuan Xiong, Huiting An, S. Cheng, Xiaofei Wang, Yun Ma
The east part of the South China Sea is located at the convergence zone between the Eurasian Plate and the Pacific Plate(the Philippine Sea Plate).To the east of the South China Sea,there are the Manila Subduction Zone,the Luzon Arc and the East Luzon Philippine Subduction Zone,consisting of a opposite-dipping trench-arc-basin system which is called subduction system in this paper.The system can be subdivided into three segments from north to south by the Babuyan Strike-slipping Fault and the Sibuyan Strike-slipping Fault respectively,based on the differences in geomorphology,earthquakes,volcanism,faulting,basins and geophysical characteristics.The north segment is affected by the collision of the Taiwan Orogen,and the NWW-directed indentation of the Philippine Sea Plate and the stopping of the Beikang Uplift to the west of the Taiwan Orogen,resulted in the extrusion of the continental blocks of northeastern South China Sea,and the formation of the Taixinan Basin and the Taixi Basin,which are a series of collision-wedge-extrusion related basins.The middle segment is controlled by "Slab Window" during the subduction of fossil mid-oceanic ridge of the South China Sea,the earthquakes,magmatism,geomorphology and stress fields are different from north to south,and the formation of the basin group is controlled by arc strike-slip faults.The south segment is dominated by west-dipping subduction of the Philippine Sea Plate.The intensive earthquakes and volcanism are near the Philippine Trench.However,the stopping of the Sunda Block and the Palawan Block to the west of the Manila trench and the adjustment of the Great Philippine Fault in the central Philippine islands result in curvature of the Manila Trench in plane and decrease in earthquakes and volcanism in the west of the segment.The basin group is located in the segment developed on the basement resulting from collisions of different block fragments.The adjustment and pull-apart faulting of strike-slip faults caused the present-day basin pattern and distribution.The subduction system in the east of the South China Sea is affected by the NNW-directed indentation in the north segment and west-directed subduction in the south segment of the Philippine Plate,while the tectonic evolution of the middle segment of the subduction system is dominated by the east-directed subduction of the Manila Trench.
{"title":"SEGMENTATION OF SUBDUCTION SYSTEM IN THE EASTERN SOUTH CHINA SEA AND DYNAMICS OF RELATED BASIN GROUPS: SEGMENTATION OF SUBDUCTION SYSTEM IN THE EASTERN SOUTH CHINA SEA AND DYNAMICS OF RELATED BASIN GROUPS","authors":"Y. Xue, Li Sanzhong, Xin Liu, Y. Suo, L. Dai, Shan Yu, Shujuan Zhao, Pengcheng Wang, Lijuan Xiong, Huiting An, S. Cheng, Xiaofei Wang, Yun Ma","doi":"10.3724/SP.J.1140.2012.06129","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.06129","url":null,"abstract":"The east part of the South China Sea is located at the convergence zone between the Eurasian Plate and the Pacific Plate(the Philippine Sea Plate).To the east of the South China Sea,there are the Manila Subduction Zone,the Luzon Arc and the East Luzon Philippine Subduction Zone,consisting of a opposite-dipping trench-arc-basin system which is called subduction system in this paper.The system can be subdivided into three segments from north to south by the Babuyan Strike-slipping Fault and the Sibuyan Strike-slipping Fault respectively,based on the differences in geomorphology,earthquakes,volcanism,faulting,basins and geophysical characteristics.The north segment is affected by the collision of the Taiwan Orogen,and the NWW-directed indentation of the Philippine Sea Plate and the stopping of the Beikang Uplift to the west of the Taiwan Orogen,resulted in the extrusion of the continental blocks of northeastern South China Sea,and the formation of the Taixinan Basin and the Taixi Basin,which are a series of collision-wedge-extrusion related basins.The middle segment is controlled by \"Slab Window\" during the subduction of fossil mid-oceanic ridge of the South China Sea,the earthquakes,magmatism,geomorphology and stress fields are different from north to south,and the formation of the basin group is controlled by arc strike-slip faults.The south segment is dominated by west-dipping subduction of the Philippine Sea Plate.The intensive earthquakes and volcanism are near the Philippine Trench.However,the stopping of the Sunda Block and the Palawan Block to the west of the Manila trench and the adjustment of the Great Philippine Fault in the central Philippine islands result in curvature of the Manila Trench in plane and decrease in earthquakes and volcanism in the west of the segment.The basin group is located in the segment developed on the basement resulting from collisions of different block fragments.The adjustment and pull-apart faulting of strike-slip faults caused the present-day basin pattern and distribution.The subduction system in the east of the South China Sea is affected by the NNW-directed indentation in the north segment and west-directed subduction in the south segment of the Philippine Plate,while the tectonic evolution of the middle segment of the subduction system is dominated by the east-directed subduction of the Manila Trench.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"129-148"},"PeriodicalIF":0.0,"publicationDate":"2013-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-12DOI: 10.3724/SP.J.1140.2012.05137
Gong Yanfen, Yang Wenbin, Tan Shudong
The South China Sea is one of the marginal seas in the northwest Pacific with complex submarine topography.Its north and south shelves are wide and gentle,and the west and east shelves are narrow and steep.There are a series of sedimentary basins on the continental margin.They are rich in oil and gas resources and could be compared with the Persian Gulf as resource potential is considered.We made a brief review in this paper of the sedimentary basins in the oil and gas zones on the north continental shelf of the South China Sea,the potential zones in the Xisha Islands,Zhongsha Islands and abyssal region,the Lile-Taiping potential zone and the oil and gas zones on the south continental shelf of the South China Sea.Estimated resource and hydrocarbon potentials of these sedimentary basins are presented.According to the understanding of petroleum geology of the South China Sea,we divided the study areas into three types: the oil and gas production area,the prospective area and the area without prospect(abyssal region).Development strategies should be built for different areas.Exploitation and utilization of resources should be accelerated in the oil and gas zones on the north continental shelf of the South China Sea.In the areas of the Xisha and Zhongsha Islands,right target areas should be selected for breakthrough in key area through geophysical prospecting and regional research.We should follow the policy of the government to seek for joint development in the area of Nansha Islands.
{"title":"OIL AND GAS RESOURCES IN THE SOUTH CHINA SEA AND ITS DEVELOPMENT STRATEGY:A REVIEW","authors":"Gong Yanfen, Yang Wenbin, Tan Shudong","doi":"10.3724/SP.J.1140.2012.05137","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.05137","url":null,"abstract":"The South China Sea is one of the marginal seas in the northwest Pacific with complex submarine topography.Its north and south shelves are wide and gentle,and the west and east shelves are narrow and steep.There are a series of sedimentary basins on the continental margin.They are rich in oil and gas resources and could be compared with the Persian Gulf as resource potential is considered.We made a brief review in this paper of the sedimentary basins in the oil and gas zones on the north continental shelf of the South China Sea,the potential zones in the Xisha Islands,Zhongsha Islands and abyssal region,the Lile-Taiping potential zone and the oil and gas zones on the south continental shelf of the South China Sea.Estimated resource and hydrocarbon potentials of these sedimentary basins are presented.According to the understanding of petroleum geology of the South China Sea,we divided the study areas into three types: the oil and gas production area,the prospective area and the area without prospect(abyssal region).Development strategies should be built for different areas.Exploitation and utilization of resources should be accelerated in the oil and gas zones on the north continental shelf of the South China Sea.In the areas of the Xisha and Zhongsha Islands,right target areas should be selected for breakthrough in key area through geophysical prospecting and regional research.We should follow the policy of the government to seek for joint development in the area of Nansha Islands.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"137-147"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-12DOI: 10.3724/SP.J.1140.2012.05057
Lei Xu, Li Sanzhong, Xin Liu, Y. Suo, Qi Wu, Pengcheng Wang
The Qin-Hang Belt,an important metallogenic belt in South China,is situated in the junction of the Yangtze Block and the Cathaysia Block,bounded by the Jingdezhen-Xiangtan-Pingxiang Deep Fault Zone to the northwest of the Yangtze block and the Shaoxing-Xiangping-Beihai Deep Fault Zone to the southeast of Cathaysia Block.It has experienced the Jinning,Caledonian,Indosinian and Yanshanian movements successively,and suffered from oceanic subduction,continent-continent collision,formation of the South China Block,intensive intracontinental folding,Yanshanian reactivation,large-scale Mesozoic magmatism and formation of intracontinental basins.Various mineral deposits controlled by correspondent structural patterns were formed in the belt in different periods,especially the Yanshanian Period.
{"title":"TECTONIC SETTINGS AND METALLOGENISM OF THE EASTERN SEGMENT OF THE QIN-HANG BELT, SOUTH CHINA: TECTONIC SETTINGS AND METALLOGENISM OF THE EASTERN SEGMENT OF THE QIN-HANG BELT, SOUTH CHINA","authors":"Lei Xu, Li Sanzhong, Xin Liu, Y. Suo, Qi Wu, Pengcheng Wang","doi":"10.3724/SP.J.1140.2012.05057","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.05057","url":null,"abstract":"The Qin-Hang Belt,an important metallogenic belt in South China,is situated in the junction of the Yangtze Block and the Cathaysia Block,bounded by the Jingdezhen-Xiangtan-Pingxiang Deep Fault Zone to the northwest of the Yangtze block and the Shaoxing-Xiangping-Beihai Deep Fault Zone to the southeast of Cathaysia Block.It has experienced the Jinning,Caledonian,Indosinian and Yanshanian movements successively,and suffered from oceanic subduction,continent-continent collision,formation of the South China Block,intensive intracontinental folding,Yanshanian reactivation,large-scale Mesozoic magmatism and formation of intracontinental basins.Various mineral deposits controlled by correspondent structural patterns were formed in the belt in different periods,especially the Yanshanian Period.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"57-66"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69771830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-12DOI: 10.3724/SP.J.1140.2012.05027
N. Zhang, T. Jiang, Daojun Zhang
The Qiongdongnan Basin is located in the northwest of the South China Sea,and the deepwater area of the basin is a new favorable prospect for hydrocarbon exploration.Based on seismic and bathymetric data,the authors focused in this paper on the deep water topography of the Basin and the control of topography over the deepwater sedimentation.Various landform types were distinguished and their distribution pattern described.Discussed are also the depositional mechanism of the gravity deposits and their types,distribution and lithological characteristics,so as to reveal the control of topography on the deepwater depositional systems.Results show that the submarine topography of the Qiongdongnan Basin can be divided into three units of the continental shelf,the continental slope and the deep-sea plain.Under the control of topography,there are 6 types of sediments in the Qiongdongnan continental slope system: slope canyon,turbidite fan,slumping block,debris flow deposits,sliding mass and sedimentary waves.Our results prove that the types of sedimentary facies are closely related to the gradient of the slope.The gradient not only controls the distribution of types of gravity flow deposits,but also the adjustment of slope system.In addition,the gravity flow may change from one to another due to the change of landforms,for example,change from turbidity-current to sediment waves,or from slumping and/or debris flow to turbidity current.
{"title":"TOPOGRAPHY AND ITS CONTROL OVER DEEPWATER SEDIMENTATION IN THE QIONGDONGNAN BASIN","authors":"N. Zhang, T. Jiang, Daojun Zhang","doi":"10.3724/SP.J.1140.2012.05027","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.05027","url":null,"abstract":"The Qiongdongnan Basin is located in the northwest of the South China Sea,and the deepwater area of the basin is a new favorable prospect for hydrocarbon exploration.Based on seismic and bathymetric data,the authors focused in this paper on the deep water topography of the Basin and the control of topography over the deepwater sedimentation.Various landform types were distinguished and their distribution pattern described.Discussed are also the depositional mechanism of the gravity deposits and their types,distribution and lithological characteristics,so as to reveal the control of topography on the deepwater depositional systems.Results show that the submarine topography of the Qiongdongnan Basin can be divided into three units of the continental shelf,the continental slope and the deep-sea plain.Under the control of topography,there are 6 types of sediments in the Qiongdongnan continental slope system: slope canyon,turbidite fan,slumping block,debris flow deposits,sliding mass and sedimentary waves.Our results prove that the types of sedimentary facies are closely related to the gradient of the slope.The gradient not only controls the distribution of types of gravity flow deposits,but also the adjustment of slope system.In addition,the gravity flow may change from one to another due to the change of landforms,for example,change from turbidity-current to sediment waves,or from slumping and/or debris flow to turbidity current.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"27-33"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-12DOI: 10.3724/SP.J.1140.2012.05013
Taotao Yang, Jingwu Wu, Bin Wang, Xiaosu He, Chaoli Mao, Li Li, Lan Yang
A great number of Cenozoic petroleum basins have been discovered in the northern continental margin of the South China Sea.Two of them,the Qiongdongnan Basin and the Pearl River Mouth Basin are located in the deepwater area of the region.Recently medium and large petroleum discoveries have been obtained in the southern deepwater area of the Pearl River Mouth Basin.It verifies that favorable petroleum geological conditions occur in the deepwater area.Having similar tectonic and depositional evolutionary history with the Pearl River Mouth Basin,the southern deepwater area of the Qiongdongnan Basin should have the same potential to form medium to large gas reservoirs.It,therefore,has become a necessity to study this area in details.The accumulation of high resolution seismic data in recent years has made it possible to understand more about the structural pattern of the deepwater area of the Qiongdongnan Basin.In this regard,the Huaguang Sag was selected as a case for study.Our study reveals that there are four types of extensional structures in the area,namely graben,half graban,terraced garaben and terraced half graben,formed in two stages,corresponding to the two regional structural evaluation stages in the region.There is an obvious double-layer vertical architecture in the sag,including the rifting lower layer and the subsiding upper layer,and four units have been recognized in the sag according to the structural pattern,namely the western sag,eastern sag,middle horst and the southern slope.The distribution of Paleogene deposits or the lower layer is obviously controlled by rifting.The tectonic activities in Neogene or the upper layer were rather weak.There is little tectonic deformation.The double layer architecture has provided an excellent combination for hydrocarbon accumulation.
{"title":"STRUCTURAL PATTERN AND SEDIMENT FILLING IN HUAGUANG SAG OF SOUTHERN QIONGDONGNAN BASIN","authors":"Taotao Yang, Jingwu Wu, Bin Wang, Xiaosu He, Chaoli Mao, Li Li, Lan Yang","doi":"10.3724/SP.J.1140.2012.05013","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.05013","url":null,"abstract":"A great number of Cenozoic petroleum basins have been discovered in the northern continental margin of the South China Sea.Two of them,the Qiongdongnan Basin and the Pearl River Mouth Basin are located in the deepwater area of the region.Recently medium and large petroleum discoveries have been obtained in the southern deepwater area of the Pearl River Mouth Basin.It verifies that favorable petroleum geological conditions occur in the deepwater area.Having similar tectonic and depositional evolutionary history with the Pearl River Mouth Basin,the southern deepwater area of the Qiongdongnan Basin should have the same potential to form medium to large gas reservoirs.It,therefore,has become a necessity to study this area in details.The accumulation of high resolution seismic data in recent years has made it possible to understand more about the structural pattern of the deepwater area of the Qiongdongnan Basin.In this regard,the Huaguang Sag was selected as a case for study.Our study reveals that there are four types of extensional structures in the area,namely graben,half graban,terraced garaben and terraced half graben,formed in two stages,corresponding to the two regional structural evaluation stages in the region.There is an obvious double-layer vertical architecture in the sag,including the rifting lower layer and the subsiding upper layer,and four units have been recognized in the sag according to the structural pattern,namely the western sag,eastern sag,middle horst and the southern slope.The distribution of Paleogene deposits or the lower layer is obviously controlled by rifting.The tectonic activities in Neogene or the upper layer were rather weak.There is little tectonic deformation.The double layer architecture has provided an excellent combination for hydrocarbon accumulation.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"13-18"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-12DOI: 10.3724/SP.J.1140.2012.05073
Qian Ge, Xian-wei Meng, F. Chu, Z. Xue, J. Lei
A coupled approach based on planktonic foraminiferal oxygen isotope and organic carbon from core ZHS-176 in the northern South China Sea slope is adopted to reconstruct the history of paleoclimatic evolution since the last glacial stage.The planktonic foraminiferal oxygen isotopic oscillations in core ZHS-176 during the last glacial period are coeval with climatic variations recorded in the Greenland ice core and Western Pacific sediment.These variations include the Last Glacial Maximum,Heinrich event 1,Blling-Allerd,and Younger Dryas.During the Holocene,we also find three periods of strong precipitation stages and three periods of weak precipitation stages.The oxygen isotopic record exhibits correlation with climate records from distant regions,including the high-latitude area of North Atlantic,providing evidence for global tele-connection among regional climates.The biogenic organic carbon is dominated in core ZHS-176,and the content of terrigenous one increases while the East Asian summer monsoon strengthens.But after 3 kaBP,the terrigenous input decreases because of the weakened East Asian summer monsoon in the South China region.
{"title":"Paleoceanographic Records of Core Zhs-176 From the Northern South China Sea: Oxygen Isotope and Organic Carbon: Paleoceanographic Records of Core Zhs-176 From the Northern South China Sea: Oxygen Isotope and Organic Carbon","authors":"Qian Ge, Xian-wei Meng, F. Chu, Z. Xue, J. Lei","doi":"10.3724/SP.J.1140.2012.05073","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.05073","url":null,"abstract":"A coupled approach based on planktonic foraminiferal oxygen isotope and organic carbon from core ZHS-176 in the northern South China Sea slope is adopted to reconstruct the history of paleoclimatic evolution since the last glacial stage.The planktonic foraminiferal oxygen isotopic oscillations in core ZHS-176 during the last glacial period are coeval with climatic variations recorded in the Greenland ice core and Western Pacific sediment.These variations include the Last Glacial Maximum,Heinrich event 1,Blling-Allerd,and Younger Dryas.During the Holocene,we also find three periods of strong precipitation stages and three periods of weak precipitation stages.The oxygen isotopic record exhibits correlation with climate records from distant regions,including the high-latitude area of North Atlantic,providing evidence for global tele-connection among regional climates.The biogenic organic carbon is dominated in core ZHS-176,and the content of terrigenous one increases while the East Asian summer monsoon strengthens.But after 3 kaBP,the terrigenous input decreases because of the weakened East Asian summer monsoon in the South China region.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"73-80"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69771889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-12DOI: 10.3724/SP.J.1140.2012.05019
Hongjun Chen, G. Cai, Weidong Luo, Jiaoqi Wu, Lei Huang, Liqing Li
Detailed interpretation of morphology and shallow stratigraphic structure were carried out base on high-resolution multi-beam water depth data and single-channel seismic profiles.Three canyons and four channels were recognized in the study area.The bird view of the shape and length of the canyons or channels vary greatly in a range of 8~25km long,1.5~4 km wide,with a maximum incised depth up to 175 m.The shallow strata of the study area can be divided to two parts from bottom to top: namely U1 and U2 respectively.The seismic reflection in general is characterized by a high frequency,strong amplitude,medium-high continuation,and parallel to sub-parallel pattern.However,the reflection in the canyon is chaotic with low continuation or even discontinued.The research result indicates that slumping was well developed in the sequence U2 in the canyons area,which has close relationship with the occurrence of gas hydrate.The canyons or channels were initially formed by the decomposition of gas hydrate and further developed under the control of NW trend faults and the erosion of bottom current.The canyons and channels were formed in Quaternary according to its shape and stratigraphic position.The results may contribute to the study of oceanic morphology and the exploration of gas hydrate in the region.
{"title":"FEATURES OF CANYON MORPHOLOGY AND THEIR ORIGIN IN THE SHENHU AREA,NORTHERN SLOPE OF THE SOUTH CHINA SEA: FEATURES OF CANYON MORPHOLOGY AND THEIR ORIGIN IN THE SHENHU AREA,NORTHERN SLOPE OF THE SOUTH CHINA SEA","authors":"Hongjun Chen, G. Cai, Weidong Luo, Jiaoqi Wu, Lei Huang, Liqing Li","doi":"10.3724/SP.J.1140.2012.05019","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.05019","url":null,"abstract":"Detailed interpretation of morphology and shallow stratigraphic structure were carried out base on high-resolution multi-beam water depth data and single-channel seismic profiles.Three canyons and four channels were recognized in the study area.The bird view of the shape and length of the canyons or channels vary greatly in a range of 8~25km long,1.5~4 km wide,with a maximum incised depth up to 175 m.The shallow strata of the study area can be divided to two parts from bottom to top: namely U1 and U2 respectively.The seismic reflection in general is characterized by a high frequency,strong amplitude,medium-high continuation,and parallel to sub-parallel pattern.However,the reflection in the canyon is chaotic with low continuation or even discontinued.The research result indicates that slumping was well developed in the sequence U2 in the canyons area,which has close relationship with the occurrence of gas hydrate.The canyons or channels were initially formed by the decomposition of gas hydrate and further developed under the control of NW trend faults and the erosion of bottom current.The canyons and channels were formed in Quaternary according to its shape and stratigraphic position.The results may contribute to the study of oceanic morphology and the exploration of gas hydrate in the region.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"19-26"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-12DOI: 10.3724/SP.J.1140.2012.05149
Shuyu Wu, Jun Liu, Zhu Zhu, Zhiqiang Wu, Guolin Xiao
NMR logging technology,due to its accurate measurement result and the advantage of detecting lithological texture without damage,is increasingly and extensively applied in oil exploration and development.In this paper,we focused on the core data spectral processing method of NMR taking the Eastern Depression of the North Yellow Sea as a case.Pretreatment,spectrum analysis and formation parameter method and process were discussed for the core data processing of NMR.Using the optimal solution spectrum method,we obtained the data of effective porosity,movable fluid porosity,bound water porosity and permeability of formation parameters.
{"title":"APPLICATION OF CORE DATA PROCESSING METHOD FOR NMR MEASUREMENTS TO THE EASTERN DEPRESSION OF NORTH YELLOW SEA: APPLICATION OF CORE DATA PROCESSING METHOD FOR NMR MEASUREMENTS TO THE EASTERN DEPRESSION OF NORTH YELLOW SEA","authors":"Shuyu Wu, Jun Liu, Zhu Zhu, Zhiqiang Wu, Guolin Xiao","doi":"10.3724/SP.J.1140.2012.05149","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.05149","url":null,"abstract":"NMR logging technology,due to its accurate measurement result and the advantage of detecting lithological texture without damage,is increasingly and extensively applied in oil exploration and development.In this paper,we focused on the core data spectral processing method of NMR taking the Eastern Depression of the North Yellow Sea as a case.Pretreatment,spectrum analysis and formation parameter method and process were discussed for the core data processing of NMR.Using the optimal solution spectrum method,we obtained the data of effective porosity,movable fluid porosity,bound water porosity and permeability of formation parameters.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"32 1","pages":"149-156"},"PeriodicalIF":0.0,"publicationDate":"2013-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-02-07DOI: 10.3724/SP.J.1140.2012.04061
Xiaoyan Li, Z. Jian, Xuefa Shi, Shengfa Liu
The mud area on the inner shelf of the East China Sea is one of the depocenters since the high sea-level of the Holocene.Sedimentary records since the post-glacial saved in this area provide excellent materials for studying paleoceanographic and paleoenvironmental changes during the Holocene.The Core of MZ02 was recovered from the middle of the mud area(121.89°E,28.17°N,water depth 32 m,core length 35.3 m),and radiocarbon dating,grain-size and foraminiferal analyses were performed for paleoceanographic and paleoenvironmental reconstruction.Results show that the environmental evolution in the Holocene can be divided into 4 stages: the stage I was the coastal inner shelf during 10.8~10.5 cal.kaBP;the stage II was the period of the rapid sea-level rise from coastal shelf to the middle shelf during 10.5~8.3 cal.kaBP;the stage III was the inner-middle shelf with the Taiwan Warm Current close to the studied area during 8.3~5.2 cal.kaBP;and the stage IV was the inner shelf under the action of the enhanced coastal current.The abundance of warm-water species increased markedly at 8.4 cal.kaBP,suggesting the invasion of the Taiwan Warm Current since then.The lower δ18O in benthic foraminifera and higher abundance of epifaunal species are thought to be closely related to the enhancement of the coastal current since ~4.0 cal.kaBP.
{"title":"HOLOCENE FORAMINIFERA FROM THE MUD AREA OF THE INNER SHELF,EAST CHINA SEA AND THEIR PALEOENVIRONMENTAL SIGNIFICANCE: HOLOCENE FORAMINIFERA FROM THE MUD AREA OF THE INNER SHELF,EAST CHINA SEA AND THEIR PALEOENVIRONMENTAL SIGNIFICANCE","authors":"Xiaoyan Li, Z. Jian, Xuefa Shi, Shengfa Liu","doi":"10.3724/SP.J.1140.2012.04061","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2012.04061","url":null,"abstract":"The mud area on the inner shelf of the East China Sea is one of the depocenters since the high sea-level of the Holocene.Sedimentary records since the post-glacial saved in this area provide excellent materials for studying paleoceanographic and paleoenvironmental changes during the Holocene.The Core of MZ02 was recovered from the middle of the mud area(121.89°E,28.17°N,water depth 32 m,core length 35.3 m),and radiocarbon dating,grain-size and foraminiferal analyses were performed for paleoceanographic and paleoenvironmental reconstruction.Results show that the environmental evolution in the Holocene can be divided into 4 stages: the stage I was the coastal inner shelf during 10.8~10.5 cal.kaBP;the stage II was the period of the rapid sea-level rise from coastal shelf to the middle shelf during 10.5~8.3 cal.kaBP;the stage III was the inner-middle shelf with the Taiwan Warm Current close to the studied area during 8.3~5.2 cal.kaBP;and the stage IV was the inner shelf under the action of the enhanced coastal current.The abundance of warm-water species increased markedly at 8.4 cal.kaBP,suggesting the invasion of the Taiwan Warm Current since then.The lower δ18O in benthic foraminifera and higher abundance of epifaunal species are thought to be closely related to the enhancement of the coastal current since ~4.0 cal.kaBP.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"59 1","pages":"61-71"},"PeriodicalIF":0.0,"publicationDate":"2013-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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