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Evidence for a redox stratified Cryogenian marine basin, Datangpo Formation, South China

文献类型：期刊论文

作者Li, Chao1,2; Love, Gordon D.2; Lyons, Timothy W.2; Scott, Clinton T.2; Feng, Lianjun3; Huang, Jing3; Chang, Huajin4; Zhang, Qirui3; Chu, Xuelei3
刊名EARTH AND PLANETARY SCIENCE LETTERS
出版日期2012-05-15
卷号331页码:246-256
关键词Cryogenian ocean chemistry Datangpo Formation iron speciation S isotope
ISSN号0012-821X
DOI10.1016/j.epsl.2012.03.018
文献子类Article
英文摘要Here, in an effort to explore Cryogenian seawater chemistry, we present chemostratigraphic results for iron, carbon, molybdenum, and sulfur for two outcrop sections for the ca. 663-654 Ma Datangpo Formation deposited between the two major Neoproterozoic glacial episodes (Sturtian and Marinoan) in the Nanhua Basin, South China. Paleogeographic reconstruction suggests that the interglacial Nanhua Basin was an emerging young ocean basin, which opened by rifting from ca. 820-630 Ma. Seawater exchange with the open ocean was restricted: such interglacial conditions may have been a common feature throughout the region and the world in association with widespread rifted margins during global sea-level lowstands. Geochemical profiles generated for the shallow water Yangjiaping and deeper water Minle sections demonstrate broadly consistent stratigraphic variations and generally point to anoxic (mostly euxinic) deep water deposition for the lower black shales but increasing oxygenation for the upper siltstones deposited in shallower water at both sections. Fluctuations in water chemistry recorded in the Datangpo Formation can be explained by a stratified redox model in which water column chemistry was strongly controlled by Fe availability and other nutrient fluxes, low dissolved marine sulfate concentrations, sea level variation, and varying inputs of marine organic carbon delivered via primary production. A compilation of new and published sulfur isotope data for the Datangpo Formation indicates that the extremely S-34-enriched pyrite (up to 69 parts per thousand.,) in the basal carbonates and shales was formed mainly in the deep waters of the Nanhua Basin. The most likely explanation is a 34S-enriched deep marine sulfate pool generated, in part, during the Sturtian glaciation by bacterial sulfate reduction in combination with severely suppressed riverine sulfate inputs and restriction of the marginal basin during a dramatic drop in sea level. This study highlights the importance of both global and local controls in determining the chemical conditions in Neoproterozoic marine basins. (C) 2012 Elsevier B.V. All rights reserved.
WOS关键词PROTEROZOIC OCEAN CHEMISTRY ; NEOPROTEROZOIC DOUSHANTUO FORMATION ; SULFUR ISOTOPIC COMPOSITIONS ; BILLION YEARS AGO ; FERRUGINOUS CONDITIONS ; SEDIMENTARY-ROCKS ; SEAWATER SULFATE ; YANGTZE PLATFORM ; EDIACARAN OCEAN ; SNOWBALL EARTH
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000306030500023
出版者ELSEVIER SCIENCE BV
资助机构U.S. NSF EAR Program(EAR-0720362) ; U.S. NSF EAR Program(EAR-0720362) ; MOE ; MOE ; MST ; MST ; NSF of China(NCET-11-0724 ; NSF of China(NCET-11-0724 ; NASA Astrobiology Institute ; NASA Astrobiology Institute ; Agouron Institute ; Agouron Institute ; 41172030 ; 41172030 ; 2011CB808805 ; 2011CB808805 ; 41172029 ; 41172029 ; 40873007) ; 40873007) ; U.S. NSF EAR Program(EAR-0720362) ; U.S. NSF EAR Program(EAR-0720362) ; MOE ; MOE ; MST ; MST ; NSF of China(NCET-11-0724 ; NSF of China(NCET-11-0724 ; NASA Astrobiology Institute ; NASA Astrobiology Institute ; Agouron Institute ; Agouron Institute ; 41172030 ; 41172030 ; 2011CB808805 ; 2011CB808805 ; 41172029 ; 41172029 ; 40873007) ; 40873007) ; U.S. NSF EAR Program(EAR-0720362) ; U.S. NSF EAR Program(EAR-0720362) ; MOE ; MOE ; MST ; MST ; NSF of China(NCET-11-0724 ; NSF of China(NCET-11-0724 ; NASA Astrobiology Institute ; NASA Astrobiology Institute ; Agouron Institute ; Agouron Institute ; 41172030 ; 41172030 ; 2011CB808805 ; 2011CB808805 ; 41172029 ; 41172029 ; 40873007) ; 40873007) ; U.S. NSF EAR Program(EAR-0720362) ; U.S. NSF EAR Program(EAR-0720362) ; MOE ; MOE ; MST ; MST ; NSF of China(NCET-11-0724 ; NSF of China(NCET-11-0724 ; NASA Astrobiology Institute ; NASA Astrobiology Institute ; Agouron Institute ; Agouron Institute ; 41172030 ; 41172030 ; 2011CB808805 ; 2011CB808805 ; 41172029 ; 41172029 ; 40873007) ; 40873007)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84356]  
专题中国科学院地质与地球物理研究所
通讯作者Li, Chao
作者单位1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
2.Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA
3.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China
4.Qinghai Normal Univ, Sch Life & Geog Sci, Xining 810008, Peoples R China
推荐引用方式
GB/T 7714		 Li, Chao,Love, Gordon D.,Lyons, Timothy W.,et al. Evidence for a redox stratified Cryogenian marine basin, Datangpo Formation, South China[J]. EARTH AND PLANETARY SCIENCE LETTERS,2012,331:246-256.
APA Li, Chao.,Love, Gordon D..,Lyons, Timothy W..,Scott, Clinton T..,Feng, Lianjun.,...&Chu, Xuelei.(2012).Evidence for a redox stratified Cryogenian marine basin, Datangpo Formation, South China.EARTH AND PLANETARY SCIENCE LETTERS,331,246-256.
MLA Li, Chao,et al."Evidence for a redox stratified Cryogenian marine basin, Datangpo Formation, South China".EARTH AND PLANETARY SCIENCE LETTERS 331(2012):246-256.

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来源：地质与地球物理研究所

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