气候变化领域集成服务门户(CCPortal): Direct detection of projectile relics from the end of the lunar basin-forming epoch

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DOI	10.1126/science.1219633
	Direct detection of projectile relics from the end of the lunar basin-forming epoch
	Joy K.H.; Zolensky M.E.; Nagashima K.; Huss G.R.; Ross D.K.; McKay D.S.; Kring D.A.
发表日期	2012
ISSN	0036-8075
起始页码	1426
结束页码	1429
卷号	336 期号:6087
英文摘要	The lunar surface, a key proxy for the early Earth, contains relics of asteroids and comets that have pummeled terrestrial planetary surfaces. Surviving fragments of projectiles in the lunar regolith provide a direct measure of the types and thus the sources of exogenous material delivered to the Earth-Moon system. In ancient [>3.4 billion years ago (Ga)] regolith breccias from the Apollo 16 landing site, we located mineral and lithologic relics of magnesian chondrules from chondritic impactors. These ancient impactor fragments are not nearly as diverse as those found in younger (3.4 Ga to today) regolith breccias and soils from the Moon or that presently fall as meteorites to Earth. This suggests that primitive chondritic asteroids, originating from a similar source region, were common Earth-Moon-crossing impactors during the latter stages of the basin-forming epoch.
英文关键词	carbon; metal oxide; oxygen; asteroid; breccia; chondrite; chondrule; comet; lunar crust; lunar soil; regolith; space shuttle; article; astronomy; chemical composition; field emission scanning electron microscopy; geological time; mineralogy; moon; priority journal; soil
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244206
作者单位	Center for Lunar Science and Exploration, Lunar and Planetary Institute, Universities Space Research Association, 3600 Bay Area Boulevard, Houston, TX 77058, United States; NASA Lunar Science Institute, United States; ARES, NASA Johnson Space Center, Houston, TX 77058, United States; Hawai'i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, HI 96822, United States; Engineering and Science Contract Group, Jacobs Technology, 2224 Bay Area Boulevard, Houston, TX 77058, United States
推荐引用方式 GB/T 7714	Joy K.H.,Zolensky M.E.,Nagashima K.,et al. Direct detection of projectile relics from the end of the lunar basin-forming epoch[J],2012,336(6087).
APA	Joy K.H..,Zolensky M.E..,Nagashima K..,Huss G.R..,Ross D.K..,...&Kring D.A..(2012).Direct detection of projectile relics from the end of the lunar basin-forming epoch.Science,336(6087).
MLA	Joy K.H.,et al."Direct detection of projectile relics from the end of the lunar basin-forming epoch".Science 336.6087(2012).