Pub Date : 2014-03-06DOI: 10.3724/SP.J.1140.2013.02001
Zhaokai Xu, Tiegang Li, Li Anchun
To further understand the provenance of the surficial sediments in the East Philippine Sea,30 samples have been analyzed for rare earth elements(REE) compositions and clay mineral assemblages.Based on the REE data and a simplified two end-member mixing model,we quantitatively calculated the contributions of the eolian dust and the local volcanic debris to the study area.It shows that the contribution of the eolian dust to the study area is decreasing with the distance from the source area of the dust(i.e.,the Asian continent),while the contribution of the local volcanic matter shows a converse trend,with high values near the Parece Vela Trench.The results are very consistent with the conclusion from clay mineral assemblages and 87Sr/86Sr data of the studied samples and the conclusions from the two end-member mixing equation provided by published literatures.It suggests that the simplified calculation model is valid for provenance study in this region.
{"title":"PROVENANCE OF SURFICIAL SEDIMENTS OF THE EAST PHILIPPINE SEA:EVIDENCE FROM RARE EARTH ELEMENTS: PROVENANCE OF SURFICIAL SEDIMENTS OF THE EAST PHILIPPINE SEA:EVIDENCE FROM RARE EARTH ELEMENTS","authors":"Zhaokai Xu, Tiegang Li, Li Anchun","doi":"10.3724/SP.J.1140.2013.02001","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.02001","url":null,"abstract":"To further understand the provenance of the surficial sediments in the East Philippine Sea,30 samples have been analyzed for rare earth elements(REE) compositions and clay mineral assemblages.Based on the REE data and a simplified two end-member mixing model,we quantitatively calculated the contributions of the eolian dust and the local volcanic debris to the study area.It shows that the contribution of the eolian dust to the study area is decreasing with the distance from the source area of the dust(i.e.,the Asian continent),while the contribution of the local volcanic matter shows a converse trend,with high values near the Parece Vela Trench.The results are very consistent with the conclusion from clay mineral assemblages and 87Sr/86Sr data of the studied samples and the conclusions from the two end-member mixing equation provided by published literatures.It suggests that the simplified calculation model is valid for provenance study in this region.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2014-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773010","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 : 2014-03-06DOI: 10.3724/SP.J.1140.2013.02097
Y. Gong, Guang-xue Zhang, Yiqun Guo, Jinqiang Liang, Z. Sha, Hongbin Wang, Jinqiang Liang
As a new type of energy resources,gas hydrates have gained great attention from the society because of its cleanness and huge potential.In addition to low temperature and high pressure,the formation of gas hydrate requires more boundary conditions,such as the origin of gas and its sufficient supply,gas migration conduit and favorable conditions of sedimentation.In this regard,it becomes necessary to study the relationship between the gas hydrate occurrence and the geological conditions of tectonics,sedimentation and gas supply for better resource assessment of gas hydrates in a region.Using high-resolution multichannel seismic reflection profiles as a mean,we made a geological assessment of gas hydrates in the continental slope areas of Southwest Shen-hu in this paper.Prospective areas are identified and resource potential is estimated.The results will be helpful for future exploration of gas hydrate in the region.
{"title":"PROSPECT OF GAS HYDRATE RESOURCES IN THE AREA TO SOUTHWEST SHEN-HU OF NORTHERN SOUTH CHINA SEA: PROSPECT OF GAS HYDRATE RESOURCES IN THE AREA TO SOUTHWEST SHEN-HU OF NORTHERN SOUTH CHINA SEA","authors":"Y. Gong, Guang-xue Zhang, Yiqun Guo, Jinqiang Liang, Z. Sha, Hongbin Wang, Jinqiang Liang","doi":"10.3724/SP.J.1140.2013.02097","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.02097","url":null,"abstract":"As a new type of energy resources,gas hydrates have gained great attention from the society because of its cleanness and huge potential.In addition to low temperature and high pressure,the formation of gas hydrate requires more boundary conditions,such as the origin of gas and its sufficient supply,gas migration conduit and favorable conditions of sedimentation.In this regard,it becomes necessary to study the relationship between the gas hydrate occurrence and the geological conditions of tectonics,sedimentation and gas supply for better resource assessment of gas hydrates in a region.Using high-resolution multichannel seismic reflection profiles as a mean,we made a geological assessment of gas hydrates in the continental slope areas of Southwest Shen-hu in this paper.Prospective areas are identified and resource potential is estimated.The results will be helpful for future exploration of gas hydrate in the region.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"97-104"},"PeriodicalIF":0.0,"publicationDate":"2014-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772825","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 : 2014-03-06DOI: 10.3724/SP.J.1140.2013.01145
Chuanxiang Li, Yougui Song, Lemin Wang
The evolution and changes of the natural environment in Central Asia are well recorded by Ili loess-paleosol sequence since the Pleistocene.Over the past ten years,based on masses of meaningful exploration studies of the loess in the study area by the use of environmental magnetism,sedimentology,mineralogy,geochemistry and other research methods,significant progress has been achieved.In the paper,we summarized the environmental significance of grain size,magnetic susceptibility,carbonate content,pollen assemblage and other proxies;as well as geochemical weathering features,depositional environment and spatial distribution pattern of the loess and paleosol.The results show that: magnetic susceptibility and color are complex in climate interpretation due to the influence of various factors to certain degrees.However,the combination of pollen and carbonate indicates that there was relatively cold and dry during some paleosol formation periods,and relatively wet during some loess formation periods,and it was the same in the glacial stages.Mineral and element compositions indicate that the Ili loess formed in the a relatively cold and dry climatic condition;and the grain size is a good indicator of a warm and cold climate alternation in the study area.The weathering differentiation of the Ili loess and paleosol is not so obvious,the ground circulation in the paleosol formation period was stronger than that in the formation period of loess paleosol at the Zhaosu loess section.The spatial differences of the loess accumulation in Ili Basin are observed.
{"title":"THE RESEARCH PROGRESS ON ILI LOESS: THE RESEARCH PROGRESS ON ILI LOESS","authors":"Chuanxiang Li, Yougui Song, Lemin Wang","doi":"10.3724/SP.J.1140.2013.01145","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.01145","url":null,"abstract":"The evolution and changes of the natural environment in Central Asia are well recorded by Ili loess-paleosol sequence since the Pleistocene.Over the past ten years,based on masses of meaningful exploration studies of the loess in the study area by the use of environmental magnetism,sedimentology,mineralogy,geochemistry and other research methods,significant progress has been achieved.In the paper,we summarized the environmental significance of grain size,magnetic susceptibility,carbonate content,pollen assemblage and other proxies;as well as geochemical weathering features,depositional environment and spatial distribution pattern of the loess and paleosol.The results show that: magnetic susceptibility and color are complex in climate interpretation due to the influence of various factors to certain degrees.However,the combination of pollen and carbonate indicates that there was relatively cold and dry during some paleosol formation periods,and relatively wet during some loess formation periods,and it was the same in the glacial stages.Mineral and element compositions indicate that the Ili loess formed in the a relatively cold and dry climatic condition;and the grain size is a good indicator of a warm and cold climate alternation in the study area.The weathering differentiation of the Ili loess and paleosol is not so obvious,the ground circulation in the paleosol formation period was stronger than that in the formation period of loess paleosol at the Zhaosu loess section.The spatial differences of the loess accumulation in Ili Basin are observed.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"28 1","pages":"145-152"},"PeriodicalIF":0.0,"publicationDate":"2014-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773173","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 : 2014-03-06DOI: 10.3724/SP.J.1140.2013.02073
Weiyu Song
{"title":"STRETCHING FACTOR MODELING OF LITHOSPHERE FOR DIFFERENT LAYERS IN YINGGEHAI BASIN: STRETCHING FACTOR MODELING OF LITHOSPHERE FOR DIFFERENT LAYERS IN YINGGEHAI BASIN","authors":"Weiyu Song","doi":"10.3724/SP.J.1140.2013.02073","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.02073","url":null,"abstract":"","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"73-78"},"PeriodicalIF":0.0,"publicationDate":"2014-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773180","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 : 2014-03-06DOI: 10.3724/SP.J.1140.2013.01137
Pu Zhang, Weiguo Liu, X. Qiang
The organic carbon isotopes of the Luochuan section show that the δ13C values vary from-18.7‰ to-23.5‰,and the downcore distribution of organic carbon isotope could be divided into three stages with similar trends with the magnetic susceptibility in the glacial-interglacial scales.The results demonstrate that 1) the vegetation coverage in the Luochuan area was mainly a mixture of C3 and C4 grassland,2) the δ13C value of loess sequence better recorded the summer monsoon change in the glacial-interglacial scales just as magnetic susceptibility trend.Comparing with the organic carbon isotope of the Duanjiapo and Weinan sections,two times of evident transition on tectonic time scales are recognized since 2.5 Ma.
{"title":"VEGETATION COVERAGE AND MONSOON VARIATION RECORDED BY STABLE CARBON ISOTOPE OF LOES SINCE 2.5MA: VEGETATION COVERAGE AND MONSOON VARIATION RECORDED BY STABLE CARBON ISOTOPE OF LOES SINCE 2.5MA","authors":"Pu Zhang, Weiguo Liu, X. Qiang","doi":"10.3724/SP.J.1140.2013.01137","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.01137","url":null,"abstract":"The organic carbon isotopes of the Luochuan section show that the δ13C values vary from-18.7‰ to-23.5‰,and the downcore distribution of organic carbon isotope could be divided into three stages with similar trends with the magnetic susceptibility in the glacial-interglacial scales.The results demonstrate that 1) the vegetation coverage in the Luochuan area was mainly a mixture of C3 and C4 grassland,2) the δ13C value of loess sequence better recorded the summer monsoon change in the glacial-interglacial scales just as magnetic susceptibility trend.Comparing with the organic carbon isotope of the Duanjiapo and Weinan sections,two times of evident transition on tectonic time scales are recognized since 2.5 Ma.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"137-144"},"PeriodicalIF":0.0,"publicationDate":"2014-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773159","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 : 2014-03-06DOI: 10.3724/SP.J.1140.2013.01129
Jinguo Dong, Wei Diao, X. Kong
A great number of oxygen isotope ratios and U-Th ages data were collected and studied by the authors for the stalagmites from the Sanbao cave,Hubei Province,China.Uranium-series dating of the speleothem suggests that the stalagmites are formed in the period from the penultimate glacial period up to the present.This paper deals with the relationship between uranium concentration in stalagmites and paleoclimate data induced from the 160 precise ICP-MS 230Th data collected from 17 stalagmites from the Sanbao Cave.We discovered that the variations in 238U show a negative relation with the δ18O records of the studied stalagmites,and a positive relation with the temperature changes in West Pacific Warm Pool.The concentration of 238U in the stalagmites fluctuated rapidly during the interglacial periods,slowly during the glacial periods,and increased sharply in the past two terminations.On the orbital scale,the higher the average growth rate,the higher the uranium concentration is,and vice versa.The results also show that the pedogenic processes of the soil profile above the cave and the complex soil-water-rock interaction are well related with the outer-cave climate changes,possibly responsible for the shifts of uranium concentration.However,the shift of the 234U/238U in stalagmites seems having no any relation with the external palaeoenvironment over the past 180000 years.Therefore,the uranium concentration in the stalagmite could only be used as a new proxy for climate change with caution.
{"title":"VARIATION IN URANIUM ISOTOPES OF STALAGMITES FROM SANBAO CAVE, HUBEI PROVINCE: IMPLICATIONS FOR PALAEOCLIMATE: VARIATION IN URANIUM ISOTOPES OF STALAGMITES FROM SANBAO CAVE, HUBEI PROVINCE: IMPLICATIONS FOR PALAEOCLIMATE","authors":"Jinguo Dong, Wei Diao, X. Kong","doi":"10.3724/SP.J.1140.2013.01129","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.01129","url":null,"abstract":"A great number of oxygen isotope ratios and U-Th ages data were collected and studied by the authors for the stalagmites from the Sanbao cave,Hubei Province,China.Uranium-series dating of the speleothem suggests that the stalagmites are formed in the period from the penultimate glacial period up to the present.This paper deals with the relationship between uranium concentration in stalagmites and paleoclimate data induced from the 160 precise ICP-MS 230Th data collected from 17 stalagmites from the Sanbao Cave.We discovered that the variations in 238U show a negative relation with the δ18O records of the studied stalagmites,and a positive relation with the temperature changes in West Pacific Warm Pool.The concentration of 238U in the stalagmites fluctuated rapidly during the interglacial periods,slowly during the glacial periods,and increased sharply in the past two terminations.On the orbital scale,the higher the average growth rate,the higher the uranium concentration is,and vice versa.The results also show that the pedogenic processes of the soil profile above the cave and the complex soil-water-rock interaction are well related with the outer-cave climate changes,possibly responsible for the shifts of uranium concentration.However,the shift of the 234U/238U in stalagmites seems having no any relation with the external palaeoenvironment over the past 180000 years.Therefore,the uranium concentration in the stalagmite could only be used as a new proxy for climate change with caution.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"129-136"},"PeriodicalIF":0.0,"publicationDate":"2014-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773119","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 : 2014-03-06DOI: 10.3724/SP.J.1140.2013.02079
Yong Zhang, F. Ren, Shuyun Gong, Xianrong Zhang, Ma Lin, Shanshan Liu
{"title":"CRETACEOUS STRESS FIELD OF THE MUPING-JIMO FAULT BELT AND ITS IMPLICATION FOR TECTONIC EVOLUTION: CRETACEOUS STRESS FIELD OF THE MUPING-JIMO FAULT BELT AND ITS IMPLICATION FOR TECTONIC EVOLUTION","authors":"Yong Zhang, F. Ren, Shuyun Gong, Xianrong Zhang, Ma Lin, Shanshan Liu","doi":"10.3724/SP.J.1140.2013.02079","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.02079","url":null,"abstract":"","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"79-86"},"PeriodicalIF":0.0,"publicationDate":"2014-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69773195","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 : 2014-03-05DOI: 10.3724/SP.J.1140.2013.01057
Chunlei Jing, Yanpeng Zheng, Baohua Liu, Yingchun Cui
The latest data on global hydrothermal vent sites are used in this paper to discuss the tectonic settings of submarine polymetallic sulfide deposits and other ore-controlling factors,such as the deep magmatic activity,fault structure and sediment cap.Results show that the submarine hydrothermal polymetallic sulfide vent sites are mainly located at the divergent and convergent plate boundaries;the deep magmatic activity and the fault structures are the most important factors controlling the distribution of the hydrothermal polymetallic sulfide on mid-ocean ridges;and the speed of sea floor spreading contributes to the size of polymetallic sulfide deposits.Conclusions of this study could be used as the reference in the exploration of submarine hydrothermal polymetallic resources.
{"title":"DISTRIBUTION PATTERN OF SUBMARINE HYDROTHERMAL SULFIDE DEPOSITS AND CONTROLLING FACTORS: DISTRIBUTION PATTERN OF SUBMARINE HYDROTHERMAL SULFIDE DEPOSITS AND CONTROLLING FACTORS","authors":"Chunlei Jing, Yanpeng Zheng, Baohua Liu, Yingchun Cui","doi":"10.3724/SP.J.1140.2013.01057","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.01057","url":null,"abstract":"The latest data on global hydrothermal vent sites are used in this paper to discuss the tectonic settings of submarine polymetallic sulfide deposits and other ore-controlling factors,such as the deep magmatic activity,fault structure and sediment cap.Results show that the submarine hydrothermal polymetallic sulfide vent sites are mainly located at the divergent and convergent plate boundaries;the deep magmatic activity and the fault structures are the most important factors controlling the distribution of the hydrothermal polymetallic sulfide on mid-ocean ridges;and the speed of sea floor spreading contributes to the size of polymetallic sulfide deposits.Conclusions of this study could be used as the reference in the exploration of submarine hydrothermal polymetallic resources.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"57-64"},"PeriodicalIF":0.0,"publicationDate":"2014-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772933","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 : 2014-03-05DOI: 10.3724/SP.J.1140.2013.01091
Z. Hongyan, Jiang Suhua, Li Sanzhong
The research of surface water temperature of paleo-oceans is usually focused on Quaternary,rarely earlier than 2.5Ma.Based on the data obtained from sites 1147 and 1148 of ODP 184 Cruise,using long-chain alkenones and oxygen isotopes of benthic foraminifera as proxies,we calculated the marine oxygen isotope composition and the seawater temperature changes since 16Ma in this paper.The planktonic foraminifera oxygen isotope method was adopted to explore the mechanism of ancient seawater temperature change.The results show that the trends of water temperature change in the northern South China Sea kept step with the global climate changes.During the formation of the northern hemispheric ice sheets,the sea surface temperatures are changed synchronously with the benthic foraminiferal δ18O,which indicate the size of the high-latitude ice sheet.It shows the special nature of ancient climate changes in such a tropical sea as the South China Sea and provides new evidence for the further study of the ancient global climate change in the low-latitude tropical sea.
{"title":"VARIATION OF ANCIENT WATER TEMPERATURE AND ITS MECHANISM IN THE NORTHERN SOUTH CHINA SEA SINCE 16 MA","authors":"Z. Hongyan, Jiang Suhua, Li Sanzhong","doi":"10.3724/SP.J.1140.2013.01091","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.01091","url":null,"abstract":"The research of surface water temperature of paleo-oceans is usually focused on Quaternary,rarely earlier than 2.5Ma.Based on the data obtained from sites 1147 and 1148 of ODP 184 Cruise,using long-chain alkenones and oxygen isotopes of benthic foraminifera as proxies,we calculated the marine oxygen isotope composition and the seawater temperature changes since 16Ma in this paper.The planktonic foraminifera oxygen isotope method was adopted to explore the mechanism of ancient seawater temperature change.The results show that the trends of water temperature change in the northern South China Sea kept step with the global climate changes.During the formation of the northern hemispheric ice sheets,the sea surface temperatures are changed synchronously with the benthic foraminiferal δ18O,which indicate the size of the high-latitude ice sheet.It shows the special nature of ancient climate changes in such a tropical sea as the South China Sea and provides new evidence for the further study of the ancient global climate change in the low-latitude tropical sea.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"91-95"},"PeriodicalIF":0.0,"publicationDate":"2014-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772975","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 : 2014-03-05DOI: 10.3724/SP.J.1140.2013.01011
Xiaohui Chen, Xun-hua Zhang, Ri-hui Li, Xianhong Lan
High resolution seismic profiles and previous research progresses have been used to study the characteristics of the tidal depositional system off the coastal area of southeast Liaodong Peninsula.The results indicate that the tidal sand ridges show asymmetrical-mound and oblique progradational reflection configuration on the seismic profiles,topped by active sand waves,suggesting that they are formed by erosion or by erosion and accumulation and still active.There are four NE—SW distributed tidal sand ridges parallel to each other in the study area,whose orientation is agree with the major and minor axes of the ellipses of M2 constituent.The tidal sand ridges are 35~75 km long and 3~17 m high,3~7 km wide distributed in a water depth of 40 to 50 m.The sedimentary characteristics of the tidal sand ridges are influenced by the characters of tide and the change in sea level in the study area.The provenance of the sand ridges is multiple,which includes the eroded matters from the ebb current through the Laotieshan Channel,eroded matters from coastal island and neighborhood,river inputs and detritus from coastal currents.
{"title":"CHARACTERISTICS OF TIDAL SAND RIDGES OFF THE SOUTHEAST LIAODONG PENINSULA AND INFLUENCE FACTORS: CHARACTERISTICS OF TIDAL SAND RIDGES OFF THE SOUTHEAST LIAODONG PENINSULA AND INFLUENCE FACTORS","authors":"Xiaohui Chen, Xun-hua Zhang, Ri-hui Li, Xianhong Lan","doi":"10.3724/SP.J.1140.2013.01011","DOIUrl":"https://doi.org/10.3724/SP.J.1140.2013.01011","url":null,"abstract":"High resolution seismic profiles and previous research progresses have been used to study the characteristics of the tidal depositional system off the coastal area of southeast Liaodong Peninsula.The results indicate that the tidal sand ridges show asymmetrical-mound and oblique progradational reflection configuration on the seismic profiles,topped by active sand waves,suggesting that they are formed by erosion or by erosion and accumulation and still active.There are four NE—SW distributed tidal sand ridges parallel to each other in the study area,whose orientation is agree with the major and minor axes of the ellipses of M2 constituent.The tidal sand ridges are 35~75 km long and 3~17 m high,3~7 km wide distributed in a water depth of 40 to 50 m.The sedimentary characteristics of the tidal sand ridges are influenced by the characters of tide and the change in sea level in the study area.The provenance of the sand ridges is multiple,which includes the eroded matters from the ebb current through the Laotieshan Channel,eroded matters from coastal island and neighborhood,river inputs and detritus from coastal currents.","PeriodicalId":18188,"journal":{"name":"Marine Geology & Quaternary Geology","volume":"33 1","pages":"11-18"},"PeriodicalIF":0.0,"publicationDate":"2014-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69772256","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：