GSTDTAP  > 地球科学
DOI10.1073/pnas.1919930117
The carbon content of Earth and its core
Fischer, Rebecca A.1,2,3; Cottrell, Elizabeth2; Hauri, Erik4; Lee, Kanani K. M.5,6; Le Voyer, Marion2
2020-04-21
发表期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2020
卷号117期号:16页码:8743-8749
文章类型Article
语种英语
国家USA
英文摘要

Earth's core is likely the largest reservoir of carbon (C) in the planet, but its C abundance has been poorly constrained because measurements of carbon's preference for core versus mantle materials at the pressures and temperatures of core formation are lacking. Using metal-silicate partitioning experiments in a laser-heated diamond anvil cell, we show that carbon becomes significantly less siderophile as pressures and temperatures increase to those expected in a deep magma ocean during formation of Earth's core. Based on a multistage model of core formation, the core likely contains a maximum of 0.09(4) to 0.20(10) wt% C, making carbon a negligible contributor to the core's composition and density. However, this accounts for similar to 80 to 90% of Earth's overall carbon inventory, which totals 370(150) to 740(370) ppm. The bulk Earth's carbon/sulfur ratio is best explained by the delivery of most of Earth's volatiles from carbonaceous chondrite-like precursors.


英文关键词carbon metal-silicate partitioning core formation light elements
领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000528260600017
WOS关键词FE-RICH ALLOY ; MAGMA OCEAN ; SILICATE MELT ; VOLATILES ; SOLUBILITY ; ACCRETION ; EVOLUTION ; SULFUR ; DIFFERENTIATION ; FRACTIONATION
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/249546
专题地球科学
作者单位1.Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA;
2.Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA;
3.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA;
4.Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA;
5.Yale Univ, Dept Geol & Geophys, POB 6666, New Haven, CT 06511 USA;
6.Lawrence Livermore Natl Lab, Phys Div, Livermore, CA 94550 USA
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Fischer, Rebecca A.,Cottrell, Elizabeth,Hauri, Erik,et al. The carbon content of Earth and its core[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(16):8743-8749.
APA Fischer, Rebecca A.,Cottrell, Elizabeth,Hauri, Erik,Lee, Kanani K. M.,&Le Voyer, Marion.(2020).The carbon content of Earth and its core.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(16),8743-8749.
MLA Fischer, Rebecca A.,et al."The carbon content of Earth and its core".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.16(2020):8743-8749.
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