来自“勇气号”火星探测器在古谢夫环形山进行的小型热发射光谱仪（Mini-TES）实验的初步结果。

Initial results from the Mini-TES experiment in Gusev Crater from the Spirit Rover.

作者信息

Christensen P R, Ruff S W, Fergason R L, Knudson A T, Anwar S, Arvidson R E, Bandfield J L, Blaney D L, Budney C, Calvin W M, Glotch T D, Golombek M P, Gorelick N, Graff T G, Hamilton V E, Hayes A, Johnson J R, McSween H Y, Mehall G L, Mehall L K, Moersch J E, Morris R V, Rogers A D, Smith M D, Squyres S W, Wolff M J, Wyatt M B

机构信息

Department of Geological Sciences, Arizona State University, Tempe, AZ 85287, USA.

出版信息

Science. 2004 Aug 6;305(5685):837-42. doi: 10.1126/science.1100564.

DOI:10.1126/science.1100564

PMID:15297667

Abstract

The Miniature Thermal Emission Spectrometer (Mini-TES) on Spirit has studied the mineralogy and thermophysical properties at Gusev crater. Undisturbed soil spectra show evidence for minor carbonates and bound water. Rocks are olivinerich basalts with varying degrees of dust and other coatings. Dark-toned soils observed on disturbed surfaces may be derived from rocks and have derived mineralogy (+/-5 to 10%) of 45% pyroxene (20% Ca-rich pyroxene and 25% pigeonite), 40% sodic to intermediate plagioclase, and 15% olivine (forsterite 45% +/-5 to 10). Two spectrally distinct coatings are observed on rocks, a possible indicator of the interaction of water, rock, and airfall dust. Diurnal temperature data indicate particle sizes from 40 to 80 microm in hollows to approximately 0.5 to 3 mm in soils.

摘要

“勇气号”上的微型热发射光谱仪（Mini-TES）研究了古谢夫环形山的矿物学和热物理性质。未受扰动的土壤光谱显示存在少量碳酸盐和结合水的迹象。岩石为富含橄榄石的玄武岩，带有不同程度的尘埃和其他覆盖物。在受扰动表面观察到的深色土壤可能源自岩石，其衍生矿物学（±5%至10%）为45%辉石（20%富钙辉石和25%斜方辉石）、40%钠质至中性斜长石以及15%橄榄石（镁橄榄石45%±5%至10%）。在岩石上观察到两种光谱特征不同的覆盖物，这可能是水、岩石和空降尘埃相互作用的一个指标。昼夜温度数据表明，凹陷处颗粒大小为40至80微米，土壤中颗粒大小约为0.5至3毫米。