Diverse sedimentary conditions during deposition Of coal and oil shale from the Meihe Basin (Eocene, NE China)

Bai, Yueyue, Liu, Zhaojun, Sun, Pingchang, Liu, Rong, Hu, Xiaofeng, Zhou, Renjie, Xu, Yinbo, Zhao, Hanqing and Wang, Jianpeng (2017) Diverse sedimentary conditions during deposition Of coal and oil shale from the Meihe Basin (Eocene, NE China). Journal of Sedimentary Research, 87 10: 1100-1120. doi:10.2110/jsr.2017.60

Author Bai, Yueyue
Liu, Zhaojun
Sun, Pingchang
Liu, Rong
Hu, Xiaofeng
Zhou, Renjie
Xu, Yinbo
Zhao, Hanqing
Wang, Jianpeng
Title Diverse sedimentary conditions during deposition Of coal and oil shale from the Meihe Basin (Eocene, NE China)
Journal name Journal of Sedimentary Research   Check publisher's open access policy
ISSN 1527-1404
Publication date 2017-10-23
Year available 2017
Sub-type Article (original research)
DOI 10.2110/jsr.2017.60
Open Access Status Not yet assessed
Volume 87
Issue 10
Start page 1100
End page 1120
Total pages 21
Place of publication Tulsa, OK United States
Publisher Society for Sedimentary Geology
Language eng
Formatted abstract
The Meihe Basin in northeastern China is a normal-fault-controlled basin filled with Eocene nonmarine deposits, the sediments assigned to the Meihe Formation. Sediment grain-sizes, core study, well-log analysis and micropetrographic study combined with sedimentary facies analysis indicate that the main sedimentary facies of the Meihe Basin represent fan-delta, lake, and turbidite deposits. Thick coal seams that are mainly distributed in the eastern part of the studied area were deposited in the swamp facies of the Lower Coal-Bearing Member. Oil shale was mainly deposited in the deep lake represented by the Mudstone Member, and is mainly distributed in the southern part of the studied area. In the Lower Coal-Bearing Member, organic-rich sediments are characterized by TOC content between 0.6 wt.% and 43.1 wt.% and contain Type II and III kerogen. The thick coal seams are the result of high land-plant productivity and good preservation conditions. Thin coal seams in the fan-delta plain resulted from the migration and erosion of the fan-delta channel. In the shallow lake and fan-delta front, limited productivity coupled with dilution by inorganic matter resulted in lower organic-matter content in the Mudstone Member. Oil shale and mudstone rich in organic matter were deposited in a deep lake with an average TOC content of 3.4 wt.%. The origin of the organic matter was mainly algae and aquatic plants mixed with land plants. The improved preservation conditions and high bioproductivity in this environment resulted in three oil-shale layers in the lower part of this sedimentary succession.

Three coal-bearing and oil-shale-bearing fault basins lie adjacent to the Dunhua–Mishan Fault zone, among which the Fushun Basin is located in the southwest, the Meihe Basin is in the middle, and the Huadian Basin is in the southeast. From the Fushun Basin to the Huadian Basin, the oil shale and coal seams have distinct sedimentation characters laterally. Vertically in each basin, the organic-matter sources all have the same variation trend from land plants to land plants mixed with algae to algae then to algae mixed with land plants, and the TOC content also shows a similar trend from high to medium-high then to low in each basin.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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Created: Mon, 08 Jan 2018, 14:23:43 EST by Renjie Zhou on behalf of School of Earth and Environmental Sciences