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Sedimentary characteristics and depositional models of two types of homogenites in an Eocene continental lake basin, Shulu Sag, eastern China

文献类型：期刊论文

作者Kong, Xiangxin1,2,3; Jiang, Zaixing1,3; Han, Chao2; Li, Haipeng4; Li, Qing5; Zheng, Lijing6; Yang, Yepeng1,3; Zhang, Jianguo1,3; Xiao, Fei1,3
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2019-08-01
卷号179页码:165-188
ISSN号1367-9120
关键词Homogenite Calcilutite Earthquake Shulu Sag Megaturbidite
DOI10.1016/j.jseaes.2019.04.023
英文摘要Homogenites are homogeneous and structureless, fine-grained rocks. They have been studied extensively in marine settings and are typically interpreted as being related to catastrophic events such as earthquakes. However, studies on lacustrine homogenite-like rocks are limited. New core data from the Shulu Sag in China reveal that thick massive calcilutites exist in the lower Shahejie 3 Formation, which formed during the middle Eocene rifting stage. Based on petrographic, geochemical, and mineralogical data, these massive calcilutites are interpreted as homogenites and grouped into two types. Type A homogenite is composed of intrabasinal materials characterized by high calcite, total organic carbon (TOC) content, and delta C-13 value. Type A homogenite has two facies successions, the first of which is characterized by homogeneous appearance capped by an erosional interface and the second is characterized by repeated massive-laminated calcilutite successions. Type B homogenite contains abundant allochthonous materials displaying relatively high dolomite content and low calcite, TOC, and delta C-13 content. Type B homogenite represents the topmost finer portion of a graded megabed which includes, from base to top, grain supported carbonate conglomerates, slumped deformed portions, and debrites. The whole unit can be considered as a megaturbidite. Earthquakes are the most reasonable triggers of homogenite formation in the Shulu Sag. Type A homogenites are thought to be derived by fluidification, resuspension, and decantation of lacustrine fines due to shock waves generated by an earthquake. Type B homogenites might be deposits of distal turbidity currents and turbid clouds transformed from other gravity flows. The results of this study provide a better understanding of the formation of homogenites caused by earthquakes in a confined lacustrine basin.
WOS关键词BOHAI-BAY BASIN ; CENOZOIC TECTONIC EVOLUTION ; FINE-GRAINED SEDIMENT ; SEA TSUNAMI DEPOSITS ; DEEP-SEA ; SEISMO-TURBIDITES ; TRIGGERED TURBIDITES ; PALEOSEISMIC RECORD ; LARGE EARTHQUAKES ; FLOW DEPOSITS
资助项目National Major Research Program for Science and Technology of China[2017ZX05009-002] ; Natural Science Fundation[41772090] ; Natural Science Fundation for Young Scholars[41802130]
WOS研究方向Geology
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000472686600013
资助机构National Major Research Program for Science and Technology of China ; National Major Research Program for Science and Technology of China ; Natural Science Fundation ; Natural Science Fundation ; Natural Science Fundation for Young Scholars ; Natural Science Fundation for Young Scholars ; National Major Research Program for Science and Technology of China ; National Major Research Program for Science and Technology of China ; Natural Science Fundation ; Natural Science Fundation ; Natural Science Fundation for Young Scholars ; Natural Science Fundation for Young Scholars ; National Major Research Program for Science and Technology of China ; National Major Research Program for Science and Technology of China ; Natural Science Fundation ; Natural Science Fundation ; Natural Science Fundation for Young Scholars ; Natural Science Fundation for Young Scholars ; National Major Research Program for Science and Technology of China ; National Major Research Program for Science and Technology of China ; Natural Science Fundation ; Natural Science Fundation ; Natural Science Fundation for Young Scholars ; Natural Science Fundation for Young Scholars
源URL[http://ir.iggcas.ac.cn/handle/132A11/92517]  
专题中国科学院地质与地球物理研究所
通讯作者Jiang, Zaixing
作者单位1.China Univ Geosci Beijing, Sch Energy Resources, Beijing 100083, Peoples R China
2.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Shandong, Peoples R China
3.China Univ Geosci Beijing, Minist Educ, Key Lab Marine Reservoir Evolut & Hydrocarbon Enr, Beijing 100083, Peoples R China
4.Colorado Sch Mines, Dept Geol & Geol Engn, Golden, CO 80401 USA
5.China Univ Petr, Coll Geosci, Beijing 102249, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Kong, Xiangxin,Jiang, Zaixing,Han, Chao,et al. Sedimentary characteristics and depositional models of two types of homogenites in an Eocene continental lake basin, Shulu Sag, eastern China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2019,179:165-188.
APA Kong, Xiangxin.,Jiang, Zaixing.,Han, Chao.,Li, Haipeng.,Li, Qing.,...&Xiao, Fei.(2019).Sedimentary characteristics and depositional models of two types of homogenites in an Eocene continental lake basin, Shulu Sag, eastern China.JOURNAL OF ASIAN EARTH SCIENCES,179,165-188.
MLA Kong, Xiangxin,et al."Sedimentary characteristics and depositional models of two types of homogenites in an Eocene continental lake basin, Shulu Sag, eastern China".JOURNAL OF ASIAN EARTH SCIENCES 179(2019):165-188.

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来源：地质与地球物理研究所

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