Pub Date : 2013-01-01DOI: 10.3724/sp.j.1140.2013.01025
Wu Jing
Shallow lacustrine deposits are widely distributed in the Enping Formation of the Huizhou depression of the Pearl River Mouth Basin,and has long been considered as a kind of infilling of a faulted basin.Through the study of lithology,geophysical responses,paleontology,geochemical proxies,and grain size distribution,this paper confirms that a special delta,shallow braided river delta,was developed in the Enping Formation of the Huizhou depression in a broad shallow flat lake,with sufficient terrigenous deposits.And this system is characterized by a well-developed delta plain,an undeveloped coarsening-upwards sequence of a mouth bar,and a well-developed braided stream.Depositional features of shallow braided delta are widely observed,such as the lacustrine deposits formed in the fault-sag transition stage,wide-spread thin coal seam,high sedimentation rate,widely distributed sand body,and coarse deposits in the research area,totally different with the depositional features of the infilling deposits in a faulted lake.The new model may help exploration in the Eogene of the Huizhou depression.
{"title":"SHALLOW BRAIDED DELTAIC SYSTEM IN ENPING FORMATION OF HUIZHOU DEPRESSION,PEARL RIVER MOUTH","authors":"Wu Jing","doi":"10.3724/sp.j.1140.2013.01025","DOIUrl":"https://doi.org/10.3724/sp.j.1140.2013.01025","url":null,"abstract":"Shallow lacustrine deposits are widely distributed in the Enping Formation of the Huizhou depression of the Pearl River Mouth Basin,and has long been considered as a kind of infilling of a faulted basin.Through the study of lithology,geophysical responses,paleontology,geochemical proxies,and grain size distribution,this paper confirms that a special delta,shallow braided river delta,was developed in the Enping Formation of the Huizhou depression in a broad shallow flat lake,with sufficient terrigenous deposits.And this system is characterized by a well-developed delta plain,an undeveloped coarsening-upwards sequence of a mouth bar,and a well-developed braided stream.Depositional features of shallow braided delta are widely observed,such as the lacustrine deposits formed in the fault-sag transition stage,wide-spread thin coal seam,high sedimentation rate,widely distributed sand body,and coarse deposits in the research area,totally different with the depositional features of the infilling deposits in a faulted lake.The new model may help exploration in the Eogene of the Huizhou depression.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772707","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 : 2013-01-01DOI: 10.3724/SP.J.1140.2013.04001
Xing-min Meng, Guan Chen, P. Guo, Muqi Xiong, Wasowski Janusz
The Bailong River catchment is located in the intersection of Tibetan Plateau,Loess Plateau and Sichuan Basin.It is also the cross point of the east-west and north-south seismic zones.Due to complex geological structures,the region is characterized by steep slopes,high relative reliefs and deep incised valleys.Weak rocks,which are widely distributed,and heavy rainfalls made the region one of the four areas in China most severely affected by landslide and debris flow disasters.Based on the data from field investigation and on-going research projects,this paper deals with the characteristics of landslides and debris flows,and their genetic mechanisms.The management of monitoring and early-warning systems and hazard prevention in this region are also discussed,with the purpose to encourage further researches on geohazards and mitigation measures in the region.
{"title":"Research of Landslides and Debris Flows in Bailong River BASIN:PROGRSS and Prospect","authors":"Xing-min Meng, Guan Chen, P. Guo, Muqi Xiong, Wasowski Janusz","doi":"10.3724/SP.J.1140.2013.04001","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.04001","url":null,"abstract":"The Bailong River catchment is located in the intersection of Tibetan Plateau,Loess Plateau and Sichuan Basin.It is also the cross point of the east-west and north-south seismic zones.Due to complex geological structures,the region is characterized by steep slopes,high relative reliefs and deep incised valleys.Weak rocks,which are widely distributed,and heavy rainfalls made the region one of the four areas in China most severely affected by landslide and debris flow disasters.Based on the data from field investigation and on-going research projects,this paper deals with the characteristics of landslides and debris flows,and their genetic mechanisms.The management of monitoring and early-warning systems and hazard prevention in this region are also discussed,with the purpose to encourage further researches on geohazards and mitigation measures in the region.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773357","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 : 2013-01-01DOI: 10.3724/SP.J.1140.2013.04077
Y. Miao, Shengli Yang, Shi Zhuo, Aijun Sun
The relationship between the modern surface sediment color(e.g.,L *,a * and b *) and climatic parameters,including mean annual temperature(MAT) and mean annual precipitation(MAP),is the key to understand the past.Many studies on it are mainly focused on the modern soil and the paleosol-loess sediments in or around the Loess Plateau,and little have been devoted to the color of modern fluvial-lacustrine sediments and its relationship with climate.In this paper,we sampled at 57sites along / around the Tianshan mountain region,very dry place in Xinjiang Area,Northwest China,to measure three parameters of color,the lightness L *,the redness a * and the yellowness b *.The results show that the values of L *,a * and b * are 67.0-80.0,1.2-9.4and 7.2-22.1respectively.The relatively low correlation coefficient between L * and a * probably implicate little relationship between them,while the correlation coefficient between a * and b * is quite high.At the same time,the low correlation coefficient between altitude and either L * or a * probably imply that there is no relationship between the color parameters and MAT.However,the relatively higher correlation coefficient at different latitude means that color parameters are linked with MAP,The values of the coefficient can reach 0.28and 0.37,0.55and 0.53for L * or a * respectively.Further,we separate all color data into 16groups in order to compare them with the precipitation records from the meteorological stations along / around the Tianshan region,the correlation index between the L *,a * and MAP are 0.44and 0.55respectively.We argue that such high ratios are results of the relationship between the precipitation and the surface sediments color,especially a *.Additionally,due to too low correlation coefficient,we find no relationship between L * and CaCO 3(%) and the same situation may occur between a * and hematite.In the future,we will measure the total organic matters and the rock magnetic parameters in order to make clear what are the coloring matters.
{"title":"Relationship Between the Color of Surface Sediments and Precipitation in Arid Northwest China","authors":"Y. Miao, Shengli Yang, Shi Zhuo, Aijun Sun","doi":"10.3724/SP.J.1140.2013.04077","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.04077","url":null,"abstract":"The relationship between the modern surface sediment color(e.g.,L *,a * and b *) and climatic parameters,including mean annual temperature(MAT) and mean annual precipitation(MAP),is the key to understand the past.Many studies on it are mainly focused on the modern soil and the paleosol-loess sediments in or around the Loess Plateau,and little have been devoted to the color of modern fluvial-lacustrine sediments and its relationship with climate.In this paper,we sampled at 57sites along / around the Tianshan mountain region,very dry place in Xinjiang Area,Northwest China,to measure three parameters of color,the lightness L *,the redness a * and the yellowness b *.The results show that the values of L *,a * and b * are 67.0-80.0,1.2-9.4and 7.2-22.1respectively.The relatively low correlation coefficient between L * and a * probably implicate little relationship between them,while the correlation coefficient between a * and b * is quite high.At the same time,the low correlation coefficient between altitude and either L * or a * probably imply that there is no relationship between the color parameters and MAT.However,the relatively higher correlation coefficient at different latitude means that color parameters are linked with MAP,The values of the coefficient can reach 0.28and 0.37,0.55and 0.53for L * or a * respectively.Further,we separate all color data into 16groups in order to compare them with the precipitation records from the meteorological stations along / around the Tianshan region,the correlation index between the L *,a * and MAP are 0.44and 0.55respectively.We argue that such high ratios are results of the relationship between the precipitation and the surface sediments color,especially a *.Additionally,due to too low correlation coefficient,we find no relationship between L * and CaCO 3(%) and the same situation may occur between a * and hematite.In the future,we will measure the total organic matters and the rock magnetic parameters in order to make clear what are the coloring matters.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"77"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773736","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}
For its special geographical location and environment,the arid area of northwest China is one of the regions that most dendroclimatic studies are conducted and a lot of the tree ring related researches are published in this area.Tree growth in this area is sensitive to climate change and there are many old living trees and archaeological wood were preserved,which can provide the reliable proxy data for studying past climate and environment variation.In this paper,we discussed the spatial distribution of these dendroclimatic studies and the progress of building long tree ring chronologies and the characteristic of the tree ring recorded temperature and moisture variability in the northwest China based on the published dendroclimatic studies in this area.Our results indicate that most of the dendroclimatic studies were conducted using tree ring-width data.Tree-ring records from the northeastern Qinghai-Tibet Plateau and Tienshan Mountains in Xinjiang are moisture sensitive,while the tree ring chronologies from Altay Mountainsin,Xinjiang are temperature sensitive.There are some differences and similarities between the tree-ring records from the northeastern Qinghai-Tibet Plateau and Xinjiang.The most obvious characteristic is that the patterns in tree-ring chronologies from the northeastern Qinghai-Tibet Plateau are very consistent.
{"title":"THE ADVANCE OF DENDROCLIMATOLOGY IN ARID AREA OF NORTHWEST CHINA","authors":"Linlin Gao, X. Gou, Yang Deng, Meixue Yang, Yuxia Huo, Qiuyan Chen","doi":"10.3724/SP.J.1140.2013.04025","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.04025","url":null,"abstract":"For its special geographical location and environment,the arid area of northwest China is one of the regions that most dendroclimatic studies are conducted and a lot of the tree ring related researches are published in this area.Tree growth in this area is sensitive to climate change and there are many old living trees and archaeological wood were preserved,which can provide the reliable proxy data for studying past climate and environment variation.In this paper,we discussed the spatial distribution of these dendroclimatic studies and the progress of building long tree ring chronologies and the characteristic of the tree ring recorded temperature and moisture variability in the northwest China based on the published dendroclimatic studies in this area.Our results indicate that most of the dendroclimatic studies were conducted using tree ring-width data.Tree-ring records from the northeastern Qinghai-Tibet Plateau and Tienshan Mountains in Xinjiang are moisture sensitive,while the tree ring chronologies from Altay Mountainsin,Xinjiang are temperature sensitive.There are some differences and similarities between the tree-ring records from the northeastern Qinghai-Tibet Plateau and Xinjiang.The most obvious characteristic is that the patterns in tree-ring chronologies from the northeastern Qinghai-Tibet Plateau are very consistent.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"25"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773785","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 : 2013-01-01DOI: 10.3724/SP.J.1140.2013.04045
Ying Yang, G. Dong, Yan Zhao, Guoqiang Li, Lele Ren, Keyan Fang, Xiandu Wu
Linear slopes of instrumental temperature and precipitation data from 1960to 2008in Qinghai Province,China,were analyzed to observe their temporal trends by a T-test method.Our findings indicate that both temperature and precipitation exhibit an increasing trend with fluctuations during that period across Qinghai Province.In addition,temperature and precipitation variations are highly positively correlated.The long-term temperature and precipitation trends of southeast Qinghai Province(SEQP),which is mainly controlled by the summer monsoon,and those of northwest Qinghai Province(NWQP),which is dominated by the Westerlies,are generally in agreement,with both temperature and precipitation exhibiting a rising trend.In general,the amplitude of temperature changes in the NWQP is larger than that in the SEQP.However,the amplitude of precipitation changes in NWQP is close to that in SEQP.The core regions that exhibit an increasing precipitation trend are located in high-altitude areas,such as southern Qinghai Plateau and Qilian Mountains,while the regions with an insignificant increasing trend are located in low-lying areas,such as Qinghai Lake Basin and Qaidam Basin.The contrasting pattern may be a result of topography-induced uplifting and subsiding air dynamics.
{"title":"SPATIOTEMPORAL VARIABILITY OF TEMPERATURE AND PRECIPITATION DURING 1960—2008INFERRED FROM INSTRUMENTAL RECORDS IN QINGHAI PROVINCE,NORTHEASTERN TIBETAN PLATEAU","authors":"Ying Yang, G. Dong, Yan Zhao, Guoqiang Li, Lele Ren, Keyan Fang, Xiandu Wu","doi":"10.3724/SP.J.1140.2013.04045","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.04045","url":null,"abstract":"Linear slopes of instrumental temperature and precipitation data from 1960to 2008in Qinghai Province,China,were analyzed to observe their temporal trends by a T-test method.Our findings indicate that both temperature and precipitation exhibit an increasing trend with fluctuations during that period across Qinghai Province.In addition,temperature and precipitation variations are highly positively correlated.The long-term temperature and precipitation trends of southeast Qinghai Province(SEQP),which is mainly controlled by the summer monsoon,and those of northwest Qinghai Province(NWQP),which is dominated by the Westerlies,are generally in agreement,with both temperature and precipitation exhibiting a rising trend.In general,the amplitude of temperature changes in the NWQP is larger than that in the SEQP.However,the amplitude of precipitation changes in NWQP is close to that in SEQP.The core regions that exhibit an increasing precipitation trend are located in high-altitude areas,such as southern Qinghai Plateau and Qilian Mountains,while the regions with an insignificant increasing trend are located in low-lying areas,such as Qinghai Lake Basin and Qaidam Basin.The contrasting pattern may be a result of topography-induced uplifting and subsiding air dynamics.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"45"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773938","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 : 2013-01-01DOI: 10.3724/SP.J.1140.2013.05163
Wei Zhang, Yingwei Dong, Yang Yu, Beibei Liu, Yonghua Li, Yuanyuan Li, Mei Wang
Chemical elements of the Zhoujiagou loess in the south of Liaoning province are analyzed.According to the chemical indexes of alteration(CIA),Na/K,and the element migration orders,together with the grain size and mineralogy of the deposits,we studied the weathering features of the Zhoujiagou loess profile.Results show that the contents of SiO2,Al2O3,TFe2O3 in the south of Liaoning province are obviously higher than those in Luochuan of Shanxi province,while the contents of MgO、CaO、Na2 O,which are close to the loess in Zhenjiang and the paleo-soil in Shanxi province,are lower in the south of Liaoning province.The change in K2O、MnO、TiO2 is not obvious in all the regions studied,while the content of P2O5 is lower in the south of Liaoning than that in Zhenjiang.It is deduced that the chemical weathering in the south of Liaoning province is characterized by the leaching of not only Na and Ca,but also K and Si to some extent.The early stage of chemical weathering,which is featured by leaching of Na and Ca,is completed,and at present it is in the stage of leaching K and Si out comparing to the elements migration pattern in the Luochuan loess.The migration and accumulation of elements are different in the Lishi and Malan loess in the Zhoujiagou profile.The evolution of the chemical weathering in the profiles indicates that the paleo-climate changed abruptly from warm and humid in Middle Pleistocene to cold and dry in Late Pleistocene.The intensity of chemical weathering in these study regions are in an order of the Xiashu loess PAASLuochuan loess(not including the acid dissolution components)Luochuan loess(total samples)UCC.These differences were caused by the climate conditions during Late Quaternary.
{"title":"CHEMICAL WEATHERING OF THE LOESS IN THE SOUTH OF LIAONING PROVINCE AND ITS IMPLICATIONS FOR ENVIRONMENTAL CHANGE","authors":"Wei Zhang, Yingwei Dong, Yang Yu, Beibei Liu, Yonghua Li, Yuanyuan Li, Mei Wang","doi":"10.3724/SP.J.1140.2013.05163","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.05163","url":null,"abstract":"Chemical elements of the Zhoujiagou loess in the south of Liaoning province are analyzed.According to the chemical indexes of alteration(CIA),Na/K,and the element migration orders,together with the grain size and mineralogy of the deposits,we studied the weathering features of the Zhoujiagou loess profile.Results show that the contents of SiO2,Al2O3,TFe2O3 in the south of Liaoning province are obviously higher than those in Luochuan of Shanxi province,while the contents of MgO、CaO、Na2 O,which are close to the loess in Zhenjiang and the paleo-soil in Shanxi province,are lower in the south of Liaoning province.The change in K2O、MnO、TiO2 is not obvious in all the regions studied,while the content of P2O5 is lower in the south of Liaoning than that in Zhenjiang.It is deduced that the chemical weathering in the south of Liaoning province is characterized by the leaching of not only Na and Ca,but also K and Si to some extent.The early stage of chemical weathering,which is featured by leaching of Na and Ca,is completed,and at present it is in the stage of leaching K and Si out comparing to the elements migration pattern in the Luochuan loess.The migration and accumulation of elements are different in the Lishi and Malan loess in the Zhoujiagou profile.The evolution of the chemical weathering in the profiles indicates that the paleo-climate changed abruptly from warm and humid in Middle Pleistocene to cold and dry in Late Pleistocene.The intensity of chemical weathering in these study regions are in an order of the Xiashu loess PAASLuochuan loess(not including the acid dissolution components)Luochuan loess(total samples)UCC.These differences were caused by the climate conditions during Late Quaternary.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"163"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69774227","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 : 2013-01-01DOI: 10.3724/SP.J.1140.2013.030109
Su Ming, Y. Rui, Zhang Cuimei, Cong Xiaorong, Liang Jinqiang, Sha Zhi-bin
Recent researches of marine gas hydrate indicate that the formation,migration and distribution of the gas hydrate have close relationship with deep-water depositional systems.With the development of deep-water observations and drilling technology and the wide use of high-resolution 3D seismic data,the studies on deep-water depositional systems have made great progress.Consequently,the analysis and description of the deep-water deposits in the shallow layers in a promising target area have become a hot and difficult question in gas hydrate exploration.This paper aims to provide a systematic study on the progress of the deep-water depositional system from following aspects: source to sink system,internal architecture description,and complex controlling factors.In combination with the current situation and problems of gas hydrate exploration on the northern continental slope of the South China Sea,some suggestions were proposed,including the analysis of deep-water depositional types and background,the description of the internal architecture and evolution of the deep-water deposits in the shallow layers,and the relationship between the deep-water deposits and gas hydrate in the shallow layers,in order to provide a reference for research and exploration of gas hydrate in the region.
{"title":"PROGRESS IN STUDY OF DEEP-WATER DEPOSITIONAL SYSTEMS IN THE NORTHERN CONTINENTAL SLOPE OF THE SOUTH CHINA SEA AND ITS IMPLICATIONS FOR GAS HYDRATE RESEARCH","authors":"Su Ming, Y. Rui, Zhang Cuimei, Cong Xiaorong, Liang Jinqiang, Sha Zhi-bin","doi":"10.3724/SP.J.1140.2013.030109","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.030109","url":null,"abstract":"Recent researches of marine gas hydrate indicate that the formation,migration and distribution of the gas hydrate have close relationship with deep-water depositional systems.With the development of deep-water observations and drilling technology and the wide use of high-resolution 3D seismic data,the studies on deep-water depositional systems have made great progress.Consequently,the analysis and description of the deep-water deposits in the shallow layers in a promising target area have become a hot and difficult question in gas hydrate exploration.This paper aims to provide a systematic study on the progress of the deep-water depositional system from following aspects: source to sink system,internal architecture description,and complex controlling factors.In combination with the current situation and problems of gas hydrate exploration on the northern continental slope of the South China Sea,some suggestions were proposed,including the analysis of deep-water depositional types and background,the description of the internal architecture and evolution of the deep-water deposits in the shallow layers,and the relationship between the deep-water deposits and gas hydrate in the shallow layers,in order to provide a reference for research and exploration of gas hydrate in the region.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"109-116"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773203","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 : 2013-01-01DOI: 10.3724/SP.J.1140.2013.03065
Li Sanzhong, Shan Yu, Shujuan Zhao, Xin Liu, Shuyun Gong, Y. Suo, L. Dai, Yun Ma, Liqing Xu, X. Cao, Pengcheng Wang, Wenjun Sun, Zhao Yang, Junjiang Zhu
It is a hot debate on the Meso-Cenozoic dynamics of the East Asian continental margins,since the nature,type and evolution of its continental margins are not well-known..This paper systematically summarizes the results of plate reconstructions on the East Asian continental margin since Permian over the past 40 years with emphasis on the new research results in the past 10 years.The paper mainly focuses on the variation in types of the East Asian continental margin since Late Triassic,the transitions among different tectonic domains.Our data suggests that the East Asian continental margins as a whole experienced a pre-Triassic passive continental margin,a Late Triassic-Early Cretaceous continental magmatic arc of the Andean-type active continental margin,a Late Cretaceous-Eocene strike-slipping Andean-type active continental margin with of pull-apart basins,and a post-Oligocene Japanese-type active continental margin successively.Tectonic trasition is important for understanding of the formation of the Bohaisx Bay,the Yellow Sea,the East China Sea and the South China Sea basins in East China.The changes of the continent-ocean distribution,plate configuration and dynamics at the various stages are also discussed.
{"title":"TECTONIC TRANSITION AND PLATE RECONSTRUCTIONS OF THE EAST ASIAN CONTINENTAL MAGIN","authors":"Li Sanzhong, Shan Yu, Shujuan Zhao, Xin Liu, Shuyun Gong, Y. Suo, L. Dai, Yun Ma, Liqing Xu, X. Cao, Pengcheng Wang, Wenjun Sun, Zhao Yang, Junjiang Zhu","doi":"10.3724/SP.J.1140.2013.03065","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.03065","url":null,"abstract":"It is a hot debate on the Meso-Cenozoic dynamics of the East Asian continental margins,since the nature,type and evolution of its continental margins are not well-known..This paper systematically summarizes the results of plate reconstructions on the East Asian continental margin since Permian over the past 40 years with emphasis on the new research results in the past 10 years.The paper mainly focuses on the variation in types of the East Asian continental margin since Late Triassic,the transitions among different tectonic domains.Our data suggests that the East Asian continental margins as a whole experienced a pre-Triassic passive continental margin,a Late Triassic-Early Cretaceous continental magmatic arc of the Andean-type active continental margin,a Late Cretaceous-Eocene strike-slipping Andean-type active continental margin with of pull-apart basins,and a post-Oligocene Japanese-type active continental margin successively.Tectonic trasition is important for understanding of the formation of the Bohaisx Bay,the Yellow Sea,the East China Sea and the South China Sea basins in East China.The changes of the continent-ocean distribution,plate configuration and dynamics at the various stages are also discussed.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"65"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773229","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 : 2013-01-01DOI: 10.3724/SP.J.1140.2013.030133
P. Zhao, H. Fan, Xianghua Yang
Oil and gas accumulation pattern is of significance for rolling development of an oil field.Through the detailed study of the source,reservoir and cap combination,oil and gas drainage system and migration pattern,we established the oil/gas reservoir pattern for the Dong Ying formation of the JZ-X oilfield.Research results about oil and gas distribution,fluid property variation,reservoir pressure changes and boundary fault activities were presented in the paper.Our results suggest that the migration of oil and gas in the oilfield be caused by differentiation of oil and gas,when hydrocarbon accumulated vertically along the fault in different periods.The migration was characterized by single direction,double oil sources and independent lateral migration along faults.Some new gas reservoirs which are located under the major oil reservoir were discovered and the hydrocarbon reserves in place increased under the guidance of the oil-gas migration pattern.The discovery of gas reservoirs has satisfied the needs of power plants of the field,in addition to the needs as gas source for the surrounding gas fields.The new oil reserves are rather profitable to the oil field.
{"title":"PETROLEUM ACCUMULATION PATTERN OF DONGYING FORMATION IN JZ-X OIL FIELD AND ITS SIGNIFICANCE TO ROLLING DEVELOPMENT","authors":"P. Zhao, H. Fan, Xianghua Yang","doi":"10.3724/SP.J.1140.2013.030133","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.030133","url":null,"abstract":"Oil and gas accumulation pattern is of significance for rolling development of an oil field.Through the detailed study of the source,reservoir and cap combination,oil and gas drainage system and migration pattern,we established the oil/gas reservoir pattern for the Dong Ying formation of the JZ-X oilfield.Research results about oil and gas distribution,fluid property variation,reservoir pressure changes and boundary fault activities were presented in the paper.Our results suggest that the migration of oil and gas in the oilfield be caused by differentiation of oil and gas,when hydrocarbon accumulated vertically along the fault in different periods.The migration was characterized by single direction,double oil sources and independent lateral migration along faults.Some new gas reservoirs which are located under the major oil reservoir were discovered and the hydrocarbon reserves in place increased under the guidance of the oil-gas migration pattern.The discovery of gas reservoirs has satisfied the needs of power plants of the field,in addition to the needs as gas source for the surrounding gas fields.The new oil reserves are rather profitable to the oil field.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"133"},"PeriodicalIF":0.0,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773268","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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