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DOI | 10.1073/pnas.1916553117 |
Paleomagnetism indicates that primary magnetite in zircon records a strong Hadean geodynamo | |
Tarduno, John A.1; 39;t Erve, Olaf2 | |
2020-02-04 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:5页码:2309-2318 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Japan; Canada; Australia; England |
英文摘要 | Determining the age of the geomagnetic field is of paramount importance for understanding the evolution of the planet because the field shields the atmosphere from erosion by the solar wind. The absence or presence of the geomagnetic field also provides a unique gauge of early core conditions. Evidence for a geomagnetic field 4.2 billion-year (Gy) old, just a few hundred million years after the lunar-forming giant impact, has come from paleomagnetic analyses of zircons of the Jack Hills (Western Australia). Herein, we provide new paleomagnetic and electron microscope analyses that attest to the presence of a primary magnetic remanence carried by magnetite in these zircons and new geochemical data indicating that select Hadean zircons have escaped magnetic resetting since their formation. New paleointensity and Pb-Pb radiometric age data from additional zircons meeting robust selection criteria provide further evidence for the fidelity of the magnetic record and suggest a period of high geomagnetic field strength at 4.1 to 4.0 billion years ago (Ga) that may represent efficient convection related to chemical precipitation in Earth's Hadean liquid iron core. |
英文关键词 | Hadean geodynamo paleointensity early Earth conditions |
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:000512340900019 |
WOS关键词 | JACK HILLS ; WESTERN-AUSTRALIA ; DETRITAL ZIRCON ; PERVASIVE REMAGNETIZATION ; QUARTZITE COBBLES ; MAGMA-OCEAN ; HOST ROCKS ; SOLAR-WIND ; U-PB ; SINGLE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249623 |
专题 | 地球科学 |
作者单位 | 1.Univ Rochester, Dept Earth & Environm Sci, Rochester, NY 14627 USA; 2.Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA; 3.Geol Survey Japan, Natl Inst Adv Ind Sci & Technol AIST, Res Inst Geol & Geoinformat, Tsukuba, Ibaraki 3058567, Japan; 4.Geol Survey Canada, GSC Cent Canada, Geochronol, Ottawa, ON K1A 0E8, Canada; 5.Univ Manitoba, Dept Geol Sci, Winnipeg, MB R3T 2N2, Canada; 6.Naval Res Lab, Mat Sci & Technol Div, Washington, DC 20375 USA; 7.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA; 8.Geochron Res Grp, Bentley, WA 6982, Australia; 9.Curtin Univ Technol, Dept Appl Phys, Perth, WA 6001, Australia; 10.Univ Wisconsin, Dept Geosci, Milwaukee, WI 53201 USA; 11.Michigan Technol Univ, Dept Geol & Min Engn & Sci, Houghton, MI 49931 USA; 12.Univ Liverpool, Geomagnetism Lab, Liverpool L69 3GP, Merseyside, England |
推荐引用方式 GB/T 7714 | Tarduno, John A.,39;t Erve, Olaf. Paleomagnetism indicates that primary magnetite in zircon records a strong Hadean geodynamo[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(5):2309-2318. |
APA | Tarduno, John A.,&39;t Erve, Olaf.(2020).Paleomagnetism indicates that primary magnetite in zircon records a strong Hadean geodynamo.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(5),2309-2318. |
MLA | Tarduno, John A.,et al."Paleomagnetism indicates that primary magnetite in zircon records a strong Hadean geodynamo".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.5(2020):2309-2318. |
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