Basaltic Rocks Analyzed by the Spirit Rover in Gusev Crater
| Autor: | James F. Bell, Keith A. Milam, Larry S. Crumpler, Raymond E. Arvidson, Larry A. Haskin, Jeffrey E. Moersch, Rudolf Rieder, Joy A. Crisp, Scott M. McLennan, David J. Des Marais, Philip R. Christensen, Steven W. Ruff, Jeffrey R. Johnson, John A. Grant, Albert S. Yen, N. A. Cabrol, G. Klingelhoefer, Trevor G. Graff, A. T. Knudson, Benton C. Clark, P. A. de Souza, Richard V. Morris, A. Ghosh, Jutta Zipfel, Ralf Gellert, Heinrich Wänke, S. P. Gorevan, Jack D. Farmer, K. E. Herkenhoff, Diana L. Blaney, Alian Wang, Steven W. Squyres, Bradley L. Jolliff, Harry Y. McSween, Michael B. Wyatt |
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| Rok vydání: | 2004 |
| Předmět: |
Geologic Sediments
Extraterrestrial Environment Magnesium Compounds Mars Mineralogy Pyroxene engineering.material Feldspar Spectroscopy Mossbauer Plagioclase Composition of Mars Basalt Minerals geography Multidisciplinary geography.geographical_feature_category Olivine Silicates Spectrum Analysis Water Oxides Volcanic rock Igneous rock visual_art engineering visual_art.visual_art_medium Iron Compounds Geology |
| Zdroj: | Science. 305:842-845 |
| ISSN: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.3050842 |
| Popis: | The Spirit landing site in Gusev Crater on Mars contains dark, fine-grained, vesicular rocks interpreted as lavas. Pancam and MiniâThermal Emission Spectrometer (Mini-TES) spectra suggest that all of these rocks are similar but have variable coatings and dust mantles. Magnified images of brushed and abraded rock surfaces show alteration rinds and veins. Rock interiors contain â¤25% megacrysts. Chemical analyses of rocks by the Alpha Particle X-ray Spectrometer are consistent with picritic basalts, containing normative olivine, pyroxenes, plagioclase, and accessory FeTi oxides. MoÌssbauer, Pancam, and Mini-TES spectra confirm the presence of olivine, magnetite, and probably pyroxene. These basalts extend the known range of rock compositions composing the martian crust. |
| Databáze: | OpenAIRE |
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