An extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites

Abstract Chlorine, an extremely hydrophilic volatile element, provides important information regarding the origin of intrinsic volatiles in the Moon. Lunar apatite was found to have a wider spread of δ37Cl (from −1 to +40‰ versus standard mean ocean chloride) than most terrestrial and chondritic one...

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Autores principales:	Ying Wang, Weibiao Hsu, Yunbin Guan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9ad68d5758564bd9a71e16c19a1f2452
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spelling	oai:doaj.org-article:9ad68d5758564bd9a71e16c19a1f24522021-12-02T16:08:43ZAn extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites10.1038/s41598-019-42224-82045-2322https://doaj.org/article/9ad68d5758564bd9a71e16c19a1f24522019-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-42224-8https://doaj.org/toc/2045-2322Abstract Chlorine, an extremely hydrophilic volatile element, provides important information regarding the origin of intrinsic volatiles in the Moon. Lunar apatite was found to have a wider spread of δ37Cl (from −1 to +40‰ versus standard mean ocean chloride) than most terrestrial and chondritic ones (0 ± 0.5‰). However, the provenance of the elevated lunar δ37Cl is still enigmatic. Here we report new isotopic data for H and Cl in apatite from three lunar meteorites and discuss possible mechanisms for Cl isotopic fractionation of the Moon. The apatite grain in Dhofar 458 has an average δ37Cl value of +76‰, indicative of an extremely heavy Cl reservoir in the Moon. Volatile loss associated with the Moon-forming Giant Impact and the formation of lunar magma ocean could account for the large Cl isotopic fractionation of the Moon. The observed H2O contents (220–5200 ppm), δD (−100 to +550‰) and δ37Cl values (+3.8 − +81.1‰) in lunar apatite could be understood if late accretion of hydrous components were added to the Moon after the fractionation of Cl isotopes. The heterogeneous distribution of lunar Cl isotopes is probably resulted from complex lunar formation and differentiation processes.Ying WangWeibiao HsuYunbin GuanNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-8 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ying Wang Weibiao Hsu Yunbin Guan An extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites
description	Abstract Chlorine, an extremely hydrophilic volatile element, provides important information regarding the origin of intrinsic volatiles in the Moon. Lunar apatite was found to have a wider spread of δ37Cl (from −1 to +40‰ versus standard mean ocean chloride) than most terrestrial and chondritic ones (0 ± 0.5‰). However, the provenance of the elevated lunar δ37Cl is still enigmatic. Here we report new isotopic data for H and Cl in apatite from three lunar meteorites and discuss possible mechanisms for Cl isotopic fractionation of the Moon. The apatite grain in Dhofar 458 has an average δ37Cl value of +76‰, indicative of an extremely heavy Cl reservoir in the Moon. Volatile loss associated with the Moon-forming Giant Impact and the formation of lunar magma ocean could account for the large Cl isotopic fractionation of the Moon. The observed H2O contents (220–5200 ppm), δD (−100 to +550‰) and δ37Cl values (+3.8 − +81.1‰) in lunar apatite could be understood if late accretion of hydrous components were added to the Moon after the fractionation of Cl isotopes. The heterogeneous distribution of lunar Cl isotopes is probably resulted from complex lunar formation and differentiation processes.
format	article
author	Ying Wang Weibiao Hsu Yunbin Guan
author_facet	Ying Wang Weibiao Hsu Yunbin Guan
author_sort	Ying Wang
title	An extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites
title_short	An extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites
title_full	An extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites
title_fullStr	An extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites
title_full_unstemmed	An extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites
title_sort	extremely heavy chlorine reservoir in the moon: insights from the apatite in lunar meteorites
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/9ad68d5758564bd9a71e16c19a1f2452
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An extremely heavy chlorine reservoir in the Moon: Insights from the apatite in lunar meteorites

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