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DOI | 10.1073/pnas.1809060115 |
Volatile loss following cooling and accretion of the Moon revealed by chromium isotopes | |
Sossi, Paolo A.1; Moynier, Frederic1,2; van Zuilen, Kirsten1,3 | |
2018-10-23 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2018 |
卷号 | 115期号:43页码:10920-10925 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Netherlands |
英文摘要 | Terrestrial and lunar rocks share chemical and isotopic similarities in refractory elements, suggestive of a common precursor. By contrast, the marked depletion of volatile elements in lunar rocks together with their enrichment in heavy isotopes compared with Earth's mantle suggests that the Moon underwent evaporative loss of volatiles. However, whether equilibrium prevailed during evaporation and, if so, at what conditions (temperature, pressure, and oxygen fugacity) remain unconstrained. Chromium may shed light on this question, as it has several thermodynamically stable, oxidized gas species that can distinguish between kinetic and equilibrium regimes. Here, we present high-precision Cr isotope measurements in terrestrial and lunar rocks that reveal an enrichment in the lighter isotopes of Cr in the Moon compared with Earth's mantle by 100 +/- 40 ppm per atomic mass unit. This observation is consistent with Cr partitioning into an oxygen-rich vapor phase in equilibrium with the proto-Moon, thereby stabilizing the CrO2 species that is isotopically heavy compared with CrO in a lunar melt. Temperatures of 1,600-1,800 K and oxygen fugacities near the fayalite-magnetite-quartz buffer are required to explain the elemental and isotopic difference of Cr between Earth's mantle and the Moon. These temperatures are far lower than modeled in the aftermath of a giant impact, implying that volatile loss did not occur contemporaneously with impact but following cooling and accretion of the Moon. |
英文关键词 | Moon chromium evaporation low temperature equilibrium |
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:000448040500051 |
WOS关键词 | IMPACT-GENERATED DISK ; GIANT IMPACT ; DOUBLE SPIKE ; MG-SUITE ; HIGH-TEMPERATURE ; ORIGIN ; FRACTIONATION ; EARTH ; CR ; GEOCHEMISTRY |
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/204999 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Sorbonne Paris Cite, Univ Paris Diderot, CNRS UMR 7154, Inst Phys Globe Paris, F-75238 Paris 05, France; 2.Inst Univ France, F-75231 Paris 05, France; 3.Vrije Univ Amsterdam, Dept Earth Sci, NL-1081 HV Amsterdam, Netherlands |
推荐引用方式 GB/T 7714 | Sossi, Paolo A.,Moynier, Frederic,van Zuilen, Kirsten. Volatile loss following cooling and accretion of the Moon revealed by chromium isotopes[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(43):10920-10925. |
APA | Sossi, Paolo A.,Moynier, Frederic,&van Zuilen, Kirsten.(2018).Volatile loss following cooling and accretion of the Moon revealed by chromium isotopes.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(43),10920-10925. |
MLA | Sossi, Paolo A.,et al."Volatile loss following cooling and accretion of the Moon revealed by chromium isotopes".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.43(2018):10920-10925. |
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