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Earliest Ediacaran speleothems and their implications for terrestrial life after the Marinoan snowball Earth

文献类型：期刊论文

作者Gan, Tian1,5,6,7,8; Zhou, Guanghong3,4; Luo, Taiyi8; Pang, Ke5,6; Zhou, Mingzhong2; Luo, Weijun1; Wang, Shijie; Xiao, Shuhai7; Pang, Ke（庞科）
刊名PRECAMBRIAN RESEARCH
出版日期2022-07-15
卷号376页码:22
关键词South China Ediacaran Doushantuo Formation Cap dolostone Karstification Terrestrial microbial ecosystem
ISSN号0301-9268
DOI10.1016/j.precamres.2022.106685
通讯作者Zhou, Guanghong(zhouguanghong@gznc.edu.cn) ; Luo, Taiyi(luotaiyi@mail.gyig.ac.cn) ; Xiao, Shuhai(xiao@vt.edu)
英文摘要Cryogenian snowball Earth glaciations may have had disastrous impacts on the biosphere, particularly the terrestrial ecosystem. However, how the terrestrial ecosystem responded to and recovered from these glaciations remains poorly understood. Speleothems offer important insights into terrestrial life because their formation is critically dependent on soil CO2 derived from microbial respiration. Here we report the wide distribution of miniature paleo-speleothems from the ~ 635 Ma Doushantuo cap dolostone in South China and assess their implications for the recovery of terrestrial life after the terminal Cryogenian Marinoan glaciation. The ~ 3-m thick cap dolostone was deposited during the initial transgression following deglaciation but subsequently experienced subaerial exposure due to post-glacial rebound, which resulted in the development of extensive sheet-cavities in the cap dolostone and a widespread karstic surface atop the cap dolostone. The sheet-cavities were filled with multiple generations of minerals, including isopachous dolomite interpreted to have formed in the phreatic zone, speleothems consisting of fibrous calcite interpreted to have formed in the vadose zone, as well as later phases (i.e., isopachous radial chalcedony, crystalline quartz, and blocky calcite). The Doushantuo speleothems are millimeter-to-centimeter in size and include gravitational speleothems (stalactites and stalagmites) and non-gravitational speleothems (helictites, moonmilk, botryoids, and flat crusts). Some of them were secondarily silicified by hydrothermal fluids before a renewed transgression in which ~ 632 Ma shales overlying the cap dolostone were deposited. The wide distribution of Doushantuo speleothems and the preservation of microfossils in these speleothems indicate the presence of an active soil-microbial ecosystem in the earliest Ediacaran Period and the rapid recovery of terrestrial life after the Marinoan snowball Earth.
WOS关键词DOUSHANTUO CAP CARBONATE ; SOUTH CHINA ; ACANTHOMORPHIC ACRITARCHS ; ISOTOPIC EVIDENCE ; MICROBIAL LIFE ; METHANE SEEPS ; ANNUAL GROWTH ; MIAOHE BIOTA ; PROXY RECORD ; LAND PLANTS
资助项目National Natural Science Foundation of China[U1812402] ; National Natural Science Foundation of China[41873058] ; National Natural Science Foundation of China[41802027] ; National Natural Science Foundation of China[41921002] ; Science and Technology Foundation of Guizhou Province[(2015) 2009] ; Science and Technology Foundation of Guizhou Province[(2018) 5778-04] ; NSF[EAR-2021207] ; China Scholarship Council ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021307]
WOS研究方向Geology
语种英语
WOS记录号WOS:000820125500001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Science and Technology Foundation of Guizhou Province ; NSF ; China Scholarship Council ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
源URL[http://ir.nigpas.ac.cn/handle/332004/41010]  
专题中国科学院南京地质古生物研究所
通讯作者Zhou, Guanghong; Luo, Taiyi; Xiao, Shuhai
作者单位1.Guizhou Normal Univ, Sch Geog & Environm Sci, Guiyang 550001, Peoples R China
2.Univ Chinese Acad Sci, Beijing 101408, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
4.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China
5.Guizhou Educ Univ, Guizhou Prov Key Lab Geog State Monitoring Watersh, Guiyang 550018, Peoples R China
6.Guizhou Educ Univ, Sch Geog & Resources, Guiyang 550018, Peoples R China
7.Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA
8.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China
推荐引用方式
GB/T 7714		 Gan, Tian,Zhou, Guanghong,Luo, Taiyi,et al. Earliest Ediacaran speleothems and their implications for terrestrial life after the Marinoan snowball Earth[J]. PRECAMBRIAN RESEARCH,2022,376:22.
APA Gan, Tian.,Zhou, Guanghong.,Luo, Taiyi.,Pang, Ke.,Zhou, Mingzhong.,...&Pang, Ke.(2022).Earliest Ediacaran speleothems and their implications for terrestrial life after the Marinoan snowball Earth.PRECAMBRIAN RESEARCH,376,22.
MLA Gan, Tian,et al."Earliest Ediacaran speleothems and their implications for terrestrial life after the Marinoan snowball Earth".PRECAMBRIAN RESEARCH 376(2022):22.

入库方式： OAI收割

来源：南京地质古生物研究所

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