干旱区生态环境知识资源中心(Arid): Vestas Pinaria Region: Original Basaltic Achondrite Material Derived from Mixing Upper and Lower Crust.

Arid

报告编号	N160014485
	Vestas Pinaria Region: Original Basaltic Achondrite Material Derived from Mixing Upper and Lower Crust.
	Mcfadden, L. A; Combe, J; DeSanctis, C. M; Reddy, V; LeCorre, L; Nathues, A; Pieters, C. M; Prettyman, T; Raymond, C. A; Russell, C. T; Ammannito, E; Frigeri, A; Stephan, K; Longobardo, A; Palomba, E; Tosi, F; Zambon, F; Krohn, K.
英文摘要	Analysis of data from the Dawn mission shows that the Pinaria region of Vesta spanning a portion of the rim of the Rheasilvia basin is bright and anhydrous. Reflectance spectra, absorption band centers, and their variations, cover the range of pyroxenes from diogenite-rich to howardite and eucrite compositions, with no evidence of olivine in this region. By examining band centers and depths of the floor, walls and rims of six major craters in the region, we find a lane of diogenite-rich material next to howardite-eucrite material that does not follow the local topography. The source of this material is not clear and is probably ejecta from post-Rheasilvia impacts. Material of a howardite-eucrite composition originating from beyond the Rheasilvia basin is evident on the western edge of the region. Overall, the Pinaria region exposes the complete range of basaltic achondrite parent body material, with little evidence of contamination of non-basaltic achondrite material. With both high reflectance and low abundance of hydrated material, this region of Vesta may be considered the "Pinaria desert".
英文关键词	Achondrites Meteoritic composition Vesta asteroid Pyroxenes Olivine Absorption spectra Asteroids Reflectance Topography
出版年	2015
语种	英语
国家	United States
来源学科分类	54 - Astronomy & Astrophysics ; 84B - Extraterrestrial Exploration
URL	http://r.cnki.net/KCMS/detail/detail.aspx?DbCode=KJBG&dbname=KJBGW&filename=5a02c65a31c97d1c38a891b9
来源机构	National Aeronautics and Space Administration
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/274008
推荐引用方式 GB/T 7714	Mcfadden, L. A,Combe, J,DeSanctis, C. M,et al. Vestas Pinaria Region: Original Basaltic Achondrite Material Derived from Mixing Upper and Lower Crust.,2015.