Massive Volcanism May Have Foreshortened the Marinoan Snowball Earth

doi:10.1029/2021GL097156

	Massive Volcanism May Have Foreshortened the Marinoan Snowball Earth
	Lan, Zhongwu 5,6,7; Huyskens, Magdalena H.4; Le Hir, Guillaume 3; Mitchell, Ross N.2,7; Yin, Qing-Zhu 4; Zhang, Gangyang 1; Li, Xian-Hua 2,7
刊名	GEOPHYSICAL RESEARCH LETTERS
	2022-03-28
卷号	49 期号:6 页码:11
ISSN号	0094-8276
DOI	10.1029/2021GL097156
通讯作者	Lan, Zhongwu(lzw1981@126.com) ; Yin, Qing-Zhu(qyin@ucdavis.edu)
英文摘要	The Cryogenian Period (717-635 Ma) experienced two low-latitude "snowball Earth" glaciations, the Sturtian and the Marinoan of contrasting 57 and <16 Myr durations, respectively. A lack of reliable age controls on extensional tectonics and associated magmatic rocks during the Marinoan has hampered an understanding of the deglaciation. Furthermore, although deglaciation is generally assumed to have occurred once ongoing magmatism accumulated enough atmospheric CO2, as suggested by cap carbonates, specific geologic evidence linking volcanic events with deglaciation are lacking. Here, we present high-precision zircon geochronology with chemical abrasion-isotope-dilution isotope ratio mass spectrometry that indicates an extensive and thick sequence of rift-related magmatic rocks in South Qinling, Central China, erupted 2-6 Myr before the termination of the Marinoan. Climate modeling proposes a scenario explaining why the Marinoan was the shorter snowball and how volcanism may have driven the deglaciation. Plain Language Summary Volcanic CO2 and dust emissions have been regarded as the major driver for Marinoan deglaciation. Most of CO2 outgassing is associated with seafloor spreading and subduction (arc magmatism), which are ongoing processes on geological timescales. To drastically increase CO2 emissions, there must have been many active rift zones during Marinoan glaciation. We provide age constraints on a previously little-known major Marinoan rift-related volcanic suite in South Qinling, which reveals volcanic activity lasting 4 Myr and ending 2 Myr before the termination of the Marinoan snowball Earth. Climate modeling provides constraints for the ice-age duration deduced from the geological setting.
资助项目	Chinese Academy of Sciences[XDB18030300] ; National Key Research and Development Program of China[2017YFC0601505] ; National Science Foundation of China[41673016] ; National Science Foundation of China[41630211] ; National Science Foundation of China[41302066] ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences[193112] ; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences[GPMR201902] ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences[SKL-Z202001] ; National Natural Science Foundation of China[41888101] ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences[IGGCAS-201905]
WOS关键词	PB ZIRCON GEOCHRONOLOGY ; LU-HF ISOTOPES ; U-PB ; YANGTZE BLOCK ; SOUTH CHINA ; ID-TIMS ; NORTHERN MARGIN ; HALF-LIVES ; AGE ; GEOCHEMISTRY
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000777608200044
资助机构	Chinese Academy of Sciences ; National Key Research and Development Program of China ; National Science Foundation of China ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences ; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; National Natural Science Foundation of China ; Key Research Program of the Institute of Geology and Geophysics, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/40602]
专题	中国科学院南京地质古生物研究所
通讯作者	Lan, Zhongwu; Yin, Qing-Zhu
作者单位	1.Chengdu Univ Technol, Coll Earth Sci, Chengdu, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.Univ Paris, Inst Phys Globe Paris, Paris, France 4.Univ Calif Davis, Dept Earth & Planetary Sci, Davis, CA 95616 USA 5.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan, Peoples R China 6.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing, Peoples R China 7.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Lan, Zhongwu,Huyskens, Magdalena H.,Le Hir, Guillaume,et al. Massive Volcanism May Have Foreshortened the Marinoan Snowball Earth[J]. GEOPHYSICAL RESEARCH LETTERS,2022,49(6):11.
APA	Lan, Zhongwu.,Huyskens, Magdalena H..,Le Hir, Guillaume.,Mitchell, Ross N..,Yin, Qing-Zhu.,...&Li, Xian-Hua.(2022).Massive Volcanism May Have Foreshortened the Marinoan Snowball Earth.GEOPHYSICAL RESEARCH LETTERS,49(6),11.
MLA	Lan, Zhongwu,et al."Massive Volcanism May Have Foreshortened the Marinoan Snowball Earth".GEOPHYSICAL RESEARCH LETTERS 49.6(2022):11.