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DOI | 10.1073/pnas.1919550117 |
Alkali magmatism on a carbonaceous chondrite planetesimal | |
Aleon, Jerome1; Aleon-Toppani, Alice2; Platevoet, Bernard3; Bardintzeff, Jacques-Marie3; McKeegan, Kevin D.4; Brisset, Francois5 | |
2020-04-14 | |
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:15页码:8353-8359 |
文章类型 | Article |
语种 | 英语 |
国家 | France; USA |
英文摘要 | Recent isotopic and paleomagnetic data point to a possible connection between carbonaceous chondrites and differentiated planetary materials, suggesting the existence, perhaps ephemeral, of transitional objects with a layered structure whereby a metal-rich core is enclosed by a silicate mantle, which is itself overlain by a crust containing an outermost layer of primitive solar nebula materials. This idea has not received broad support, mostly because of a lack of samples in the meteoritic record that document incipient melting at the onset of planetary differentiation. Here, we report the discovery and the petrologic-isotopic characterization of UH154-11, a ferroan trachybasalt fragment enclosed in a Renazzo-type carbonaceous chondrite (CR). Its chemical and oxygen isotopic compositions are consistent with very-low-degree partial melting of a Vigarano-type carbonaceous chondrite (CV) from the oxidized subgroup at a depth where fluid-assisted metamorphism enhanced the Na content. Its microdoleritic texture indicates crystallization at an increasing cooling rate, such as would occur during magma ascent through a chondritic crust. This represents direct evidence of magmatic activity in a carbonaceous asteroid on the verge of differentiating and demonstrates that some primitive outer Solar System objects related to icy asteroids and comets underwent a phase of magmatic activity early in the Solar System. With its peculiar petrology, UH154-11 can be considered the long-sought first melt produced during partial differentiation of a carbonaceous chondritic planetary body, bridging a previously persistent gap in differentiation processes from icy cometary bodies to fully melted iron meteorites with isotopic affinities to carbonaceous chondrites. |
英文关键词 | alkali magmatism early Solar System planetary differentiation O and Mg isotopes meteorites |
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:000526871700024 |
WOS关键词 | OXYGEN-ISOTOPE ; CK CHONDRITES ; PARENT BODY ; CV ; CONSTRAINTS ; DIFFERENTIATION ; ACCRETION ; TEXTURES ; OLIVINE ; SAMPLES |
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/249555 |
专题 | 地球科学 |
作者单位 | 1.Univ Paris 06, Inst Mineral Phys Mat & Cosmochim, Museum Natl Hist Nat, Inst Rech Dev,Sorbonne Univ,CNRS,UMR 7590, F-75005 Paris, France; 2.Univ Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France; 3.Univ Paris Saclay, Geosci Paris Sud, Sci Terre, Volcanol Planetol,CNRS,UMR 8148, F-91405 Orsay, France; 4.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA; 5.Univ Paris Saclay, CNRS, Inst Chim Mol & Mat Orsay, F-91405 Orsay, France |
推荐引用方式 GB/T 7714 | Aleon, Jerome,Aleon-Toppani, Alice,Platevoet, Bernard,et al. Alkali magmatism on a carbonaceous chondrite planetesimal[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(15):8353-8359. |
APA | Aleon, Jerome,Aleon-Toppani, Alice,Platevoet, Bernard,Bardintzeff, Jacques-Marie,McKeegan, Kevin D.,&Brisset, Francois.(2020).Alkali magmatism on a carbonaceous chondrite planetesimal.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(15),8353-8359. |
MLA | Aleon, Jerome,et al."Alkali magmatism on a carbonaceous chondrite planetesimal".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.15(2020):8353-8359. |
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