干旱区生态环境知识资源中心(Arid): Complex Exposure History of the Gold Basin L4-Chondrite Shower From Cosmogenic Radionuclides and Noble Gases.

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报告编号	DE2002803427
	Complex Exposure History of the Gold Basin L4-Chondrite Shower From Cosmogenic Radionuclides and Noble Gases.
	Welten, K. C; Nishiizumi, K; Caffee, M. W; Masarik, J; Wieler, R.
英文摘要	Gold Basin is a large L4 chondrite shower, that was recently discovered in the Mojave Desert, Arizona. Based on (10)Be and (14)C concentrations in several fragments, the pre-atmospheric radius of this shower was estimated to be 3-4 meters. Among chondrites, Gold Basin is one of the largest, thus providing a unique opportunity for comparing measured cosmogenic nuclide concentrations with model calculations for large objects. Noble gas measurements combined with (10)Be data of most Gold Basin samples suggest a single-stage exposure of 15-30 Myr, although a few samples may require a complex exposure history. We selected eight samples of the Gold Basin shower that were analyzed for noble gases; these samples represent a wide range of shielding depths.
英文关键词	Meteorites Radioactive isotopes Rare gases Shielding Chondrites Cosmic rays Exposure Arizona
出版年	2001
语种	英语
国家	United States
URL	http://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=59ffd1a931c97d1c38942061
来源机构	Technical Information Center Oak Ridge Tennessee
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/272997
推荐引用方式 GB/T 7714	Welten, K. C,Nishiizumi, K,Caffee, M. W,et al. Complex Exposure History of the Gold Basin L4-Chondrite Shower From Cosmogenic Radionuclides and Noble Gases.,2001.