DOI: 10.1007/s00531-014-1089-3
Scopus记录号: 2-s2.0-84925492081
论文题名: Organic accumulation in lacustrine rift basin: constraints from mineralogical and multiple geochemical proxies
作者: Fu X. ; Jian W. ; Chen W. ; Feng X. ; Wang D. ; Song C. ; Zeng S.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 104, 期: 2 起始页码: 495
结束页码: 511
语种: 英语
英文关键词: Lacustrine sediments
; Lunpola Basin
; Organic accumulation
; Oxygen-depleted condition
; Primary productivity
; Tibet
英文摘要: The Lunpola Basin in the central Tibet is the highest petroliferous basin in the world. The basin is a Cenozoic lacustrine rift basin with widespread oil shale depositions, which provide a valuable example for understanding the mechanisms of organic accumulation. Thirty-five samples of oil shale and mudstone were collected from one of the organic-rich oil shale intervals in the Lunpola Basin to discuss the controlling factors of organic enrichment. In the investigated oil shale interval, many redox proxies, including V/(V + Ni) ratios, Mo–U covariations, and pyrite framboid size distribution suggest anoxic conditions. However, the almost consistent variation patterns of TOC, P and Mo contents indicate that organic matter accumulation was controlled mainly by primary productivity. The relatively low Sr/Ba (average 0.74) and Sr/Cu ratios (average 4.75) suggest a warm–humid climate during the oil shale deposition. These conditions are suitable for living of organisms, which would raise the initial productivity of lake and in turn could have led to the oxygen-depleted conditions. The detrital input together with fast sedimentary rate during the oil shale deposition would result in dilution of organic matter. © 2014, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925492081&doi=10.1007%2fs00531-014-1089-3&partnerID=40&md5=5a48223da40c945903f4dff2dab1c390
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70353
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Chengdu Institute of Geology and Mineral Resources, Chengdu, China; Key Laboratory for Sedimentary Basin and Oil and Gas Resources, Ministry of Land and Resources, Chengdu, China
Recommended Citation:
Fu X.,Jian W.,Chen W.,et al. Organic accumulation in lacustrine rift basin: constraints from mineralogical and multiple geochemical proxies[J]. International Journal of Earth Sciences,2014-01-01,104(2)