在火星的尼利槽沟地区发现橄榄石。
Discovery of olivine in the Nili Fssae region of Mars.
作者信息
Hoefen Todd M, Clark Roger N, Bandfield Joshua L, Smith Michael D, Pearl John C, Christensen Philip R
机构信息
U.S. Geological Survey, Denver, CO 80225, USA.
出版信息
Science. 2003 Oct 24;302(5645):627-30. doi: 10.1126/science.1089647.
We have detected a 30,000-square-kilometer area rich in olivine in the Nili Fossae region of Mars. Nili Fossae has been interpreted as a complex of grabens and fractures related to the formation of the Isidis impact basin. We propose that post-impact faulting of this area has exposed subsurface layers rich in olivine. Linear mixture analysis of Thermal Emission Spectrometer spectra shows surface exposures of 30% olivine, where the composition of the olivine ranges from Fo30 to Fo70.
我们在火星的尼利槽沟地区探测到一个面积达3万平方公里、富含橄榄石的区域。尼利槽沟被解释为与伊希地撞击盆地形成相关的地堑和断裂复合体。我们认为该区域撞击后的断层活动使富含橄榄石的地下层得以暴露。热发射光谱仪光谱的线性混合分析显示，地表橄榄石的暴露比例为30%，其中橄榄石的成分范围为镁橄榄石30至镁橄榄石70 。
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