Sedimentary characteristics and depositional model of a Paleocene-Eocene salt lake in the Jiangling Depression, China

We studied the sedimentary characteristics of a Paleocene-Eocene salt lake in the Jiangling Depression through field core observation, thin section identification, scanning electron microscopy, and X-ray diffraction analysis. On the basis of sedimentary characteristics we have summarized the petrolo...

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Published inChinese journal of oceanology and limnology Vol. 33; no. 6; pp. 1426 - 1435
Main Author 余小灿 王春连 刘成林 张招崇 徐海明 黄华 谢腾骁 李皓楠 刘锦磊
Format Journal Article
LanguageEnglish
Published Heidelberg Science Press 01.11.2015
Springer Nature B.V
Subjects
Boron
Desalination
Earth and Environmental Science
Earth Sciences
Electron microscopy
Eocene
Halite
Halites
Inland waters
Lakes
Mineralogy
Mudstone
Oceanography
Palaeocene
Paleocene
Salt lakes
Salting
Scanning electron microscopy
Sedimentary environments
Sediments
Shallow water
Water salinity
X-ray diffraction
X-ray diffraction analysis
X射线衍射分析
古新世
坳陷
扫描电子显微镜
早始新世
沉积模式
沉积特征
盐湖
China
Jiangling China
China, People's Rep
salt lake
salt rhythm
depositional model
Jiangling Depression
Paleocene-Eocene
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Summary:We studied the sedimentary characteristics of a Paleocene-Eocene salt lake in the Jiangling Depression through field core observation, thin section identification, scanning electron microscopy, and X-ray diffraction analysis. On the basis of sedimentary characteristics we have summarized the petrological and mineralogical characteristics of the salt lake and proposed 9 types of grade IV salt rhythms. The deposition shows a desalting to salting order of halite-argillaceous-mudstone-mud dolostone- mud anhydrock-glauberite-halite. The relationship among grade IV rhythms, water salinity and climate fluctuations was analyzed. Based on the analysis of the relationship between boron content and mudstone color and by combining the mineralogy and sedimentary environment characteristics, we propose that the early and late Paleocene Shashi Formation in the Jiangling Depression was a paleolacustrine depositional environment with a high salt content, which is a representation of the shallow water salt lake depositional model. The middle Paleocene Shashi Formation and the early Eocene Xingouzui Formation were salt and brackish sedimentary environments with low salt content in a deep paleolake, which represents a deep salt lake depositional model.
Bibliography:YU Xiaocan, WANG Chunlian, LIU Chenglin, ZHANG Zhaochong, XU Haiming, HUANG Hua, XIE Tengxiao, LI Haonan, LIU Jinlei （1.State Key Laboratory of Geological Processes and Mineral Resources, School of the Earth Sciences and Resources, China University of Geosciences （Beijing）, Beijing 100083, China; 2. MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resource, Chinese Academy of Geological Sciences, Beijing 100037, China;3. Research Institute of Exploration and Development of Jianghan Oilfield Branch Company of SINOPEC, Wuhan 430223, China; 4. School of Engineering and Technology, China University of Geosciences （Beijing）, Beijing 100083, China; 5. School of Geoseiences, Yangtze University, Wuhan 430100, China）
Paleocene-Eocene; salt lake; salt rhythm; depositional model; Jiangling Depression
37-1150/P
We studied the sedimentary characteristics of a Paleocene-Eocene salt lake in the Jiangling Depression through field core observation, thin section identification, scanning electron microscopy, and X-ray diffraction analysis. On the basis of sedimentary characteristics we have summarized the petrological and mineralogical characteristics of the salt lake and proposed 9 types of grade IV salt rhythms. The deposition shows a desalting to salting order of halite-argillaceous-mudstone-mud dolostone- mud anhydrock-glauberite-halite. The relationship among grade IV rhythms, water salinity and climate fluctuations was analyzed. Based on the analysis of the relationship between boron content and mudstone color and by combining the mineralogy and sedimentary environment characteristics, we propose that the early and late Paleocene Shashi Formation in the Jiangling Depression was a paleolacustrine depositional environment with a high salt content, which is a representation of the shallow water salt lake depositional model. The middle Paleocene Shashi Formation and the early Eocene Xingouzui Formation were salt and brackish sedimentary environments with low salt content in a deep paleolake, which represents a deep salt lake depositional model.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0254-4059
2096-5508
1993-5005
2523-3521
DOI:10.1007/s00343-015-4375-4