气候变化领域集成服务门户(CCPortal): The isotopic composition of volatiles in the unique Bench Crater carbonaceous chondrite impactor found in the Apollo 12 regolith

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DOI	10.1016/j.epsl.2020.116265
	The isotopic composition of volatiles in the unique Bench Crater carbonaceous chondrite impactor found in the Apollo 12 regolith
	Joy K.H.; Tartèse R.; Messenger S.; Zolensky M.E.; Marrocchi Y.; Frank D.R.; Kring D.A.
发表日期	2020
ISSN	0012821X
卷号	540
英文摘要	Projectiles striking the Moon have modified its crust and delivered volatile elements to its interior and surface. Direct evidence of impactor origins is recorded by the rare occurrence of sub-cm sized meteorite fragments identified in Apollo samples and lunar meteorites. The Bench Crater meteorite is a millimetre-sized carbonaceous chondrite collected in regolith on the rim of Bench impact crater at the Apollo 12 landing site. Transmission electron microscopy has previously shown that Bench Crater contains abundant hydrated silicates, establishing the survivability of hydrated material impacting the lunar surface. To provide further information on the volatile inventory of the Bench Crater meteorite, we report here the isotope compositions of hydrogen, nitrogen, carbon and oxygen. This is the first direct isotopic analysis of meteoritic material delivered to the lunar surface and provides context for volatile and organic element signatures in lunar regolith samples, and the survivability of volatile material delivered to planetary surfaces during impact bombardment. The Bench Crater meteorite is characterised by δD values ranging between −36 ± 40 and 200 ± 40‰, and bulk average δ13C of −13 ± 30‰, and δ15N of −40 ± 36‰ (all uncertainties at the 2σ confidence level). The oxygen isotope compositions measured in situ in matrix silicates and magnetite in Bench Crater are consistent with those measured in matrix and magnetite in CI and CM chondrite falls. Altogether, these new H, C, N and O isotope data, coupled to mineralogical and geochemical observations, suggest that Bench Crater may have been derived from an asteroidal parent body not represented in the terrestrial meteorite collection. This is a crucial outcome in the current context of sample-return missions to carbonaceous asteroids, and more broadly for investigating the flux of material delivered to the Earth-Moon system through time. © 2020 The Authors
关键词	carbonaceous chondrite light stable isotopes meteorite Moon regolith volatiles
英文关键词	High resolution transmission electron microscopy; Hydration; Isotopes; Lunar surface analysis; Magnetite; Meteor impacts; Oxygen; Planetary surface analysis; Silicates; Structural geology; Carbonaceous chondrites; Hydrated silicate; Isotope compositions; Isotopic composition; Oxygen isotope composition; Planetary surfaces; Volatile inventory; Volatile materials; Meteorites; carbonaceous chondrite; crater; isotopic composition; lunar meteorite; Moon; regolith; transmission electron microscopy; volatile element
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202687
作者单位	Department of Earth and Environmental Sciences, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom; Center for Lunar Science and Exploration, The Lunar and Planetary Institute, 3600 Bay Area Blvd., Houston, TX 77058, United States; Previously based at Robert M Walker Laboratory for Space Science, Astromaterials Research and Exploration Science, NASA Johnson Space Center, Houston, TX 77058, United States; XI2, Astromaterials Research and Exploration Science, NASA Johnson Space Center, Houston, TX 77096, United States; CRPG, CNRS, Université de Lorraine, UMR 7358, Vandoeuvre-les-Nancy, F-54501, France; University of Hawai'i at Manoa Hawai'i Institute of Geophysics and Planetology, 1680 East-West Road, POST 602, Honolulu, HI 96822, United States; NASA Solar System Exploration Research Virtual Institute
推荐引用方式 GB/T 7714	Joy K.H.,Tartèse R.,Messenger S.,et al. The isotopic composition of volatiles in the unique Bench Crater carbonaceous chondrite impactor found in the Apollo 12 regolith[J],2020,540.
APA	Joy K.H..,Tartèse R..,Messenger S..,Zolensky M.E..,Marrocchi Y..,...&Kring D.A..(2020).The isotopic composition of volatiles in the unique Bench Crater carbonaceous chondrite impactor found in the Apollo 12 regolith.Earth and Planetary Science Letters,540.
MLA	Joy K.H.,et al."The isotopic composition of volatiles in the unique Bench Crater carbonaceous chondrite impactor found in the Apollo 12 regolith".Earth and Planetary Science Letters 540(2020).