气候变化领域集成服务门户(CCPortal): Emergence of felsic crust and subaerial weathering recorded in Palaeoarchaean barite

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DOI	10.1038/s41561-022-00902-9
	Emergence of felsic crust and subaerial weathering recorded in Palaeoarchaean barite
	Roerdink, Desiree L.; Ronen, Yuval; Strauss, Harald; Mason, Paul R. D.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	227
结束页码	+
卷号	15 期号:3 页码:8
英文摘要	Reconstructing the emergence and weathering of continental crust in the Archaean eon is crucial for our understanding of early ocean chemistry, biosphere evolution and the onset of plate tectonics. However, considerable disagreement exists between elemental and isotopic proxies that have been used to trace crustal input into marine sediments, and data are scarce before 3 Ga. Here we show that chemical weathering modified the Sr isotopic composition of seawater as recorded in 3.52-3.20 Ga stratiform barite deposits from three different cratons. Using a combination of Sr, S and O isotope data, barite petrography and a hydrothermal mixing model, we calculate a Sr isotope evolution trend of Palaeoarchaean seawater that is much more radiogenic than the curve previously determined from carbonate rocks. Our findings suggest that evolved crust containing high Rb/Sr was subaerial and weathering into the oceans from approximately 3.7 +/- 0.15 Ga onwards with impacts on ocean chemistry and the nutrient supply to the marine biosphere.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000761836900001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272607
作者单位	University of Bergen; University of Bergen; University of Munster; Utrecht University
推荐引用方式 GB/T 7714	Roerdink, Desiree L.,Ronen, Yuval,Strauss, Harald,et al. Emergence of felsic crust and subaerial weathering recorded in Palaeoarchaean barite[J],2022,15(3):8.
APA	Roerdink, Desiree L.,Ronen, Yuval,Strauss, Harald,&Mason, Paul R. D..(2022).Emergence of felsic crust and subaerial weathering recorded in Palaeoarchaean barite.NATURE GEOSCIENCE,15(3),8.
MLA	Roerdink, Desiree L.,et al."Emergence of felsic crust and subaerial weathering recorded in Palaeoarchaean barite".NATURE GEOSCIENCE 15.3(2022):8.