In Situ Evidence for an Ancient Aqueous Environment at Meridiani Planum, Mars
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چکیده
منابع مشابه
In situ evidence for an ancient aqueous environment at Meridiani Planum, Mars.
Sedimentary rocks at Eagle crater in Meridiani Planum are composed of fine-grained siliciclastic materials derived from weathering of basaltic rocks, sulfate minerals (including magnesium sulfate and jarosite) that constitute several tens of percent of the rock by weight, and hematite. Cross-stratification observed in rock outcrops indicates eolian and aqueous transport. Diagenetic features inc...
متن کاملThe Opportunity Rover's Athena science investigation at Meridiani Planum, Mars.
The Mars Exploration Rover Opportunity has investigated the landing site in Eagle crater and the nearby plains within Meridiani Planum. The soils consist of fine-grained basaltic sand and a surface lag of hematite-rich spherules, spherule fragments, and other granules. Wind ripples are common. Underlying the thin soil layer, and exposed within small impact craters and troughs, are flat-lying se...
متن کاملFormation of jarosite-bearing deposits through aqueous oxidation of pyrite at Meridiani Planum, Mars
[1] The discovery of sulfate-rich layered deposits with hematite spherules at the landing site of the Opportunity rover is consistent with mineral deposition in an aqueous environment. We evaluate conditions responsible for the formation of a jarosite-goethite-gypsum assemblage with speciation calculations. The results show that the assemblage could have precipitated from acidic solutions forme...
متن کاملSpherical Hematite Concretions in Meridiani Planum, Mars, and Monterde, Northeast Spain: an Analogue Aqueous Origin
AND MONTERDE, NORTHEAST SPAIN: AN ANALOGUE AQUEOUS ORIGIN Alberto G. Fairén, Ricardo Amils, Fernando Leandro, James M. Dohm, Dirk SchulzeMakuch, and Alexis P. Rodríguez. Centro de Biología Molecular, Universidad Autónoma de Madrid, 28049-Cantoblanco, Madrid, Spain. [email protected], Centro de Astrobiología (CSIC–INTA). 28850-Torrejón de Ardoz, Madrid. Spain, Facultad de Geología, Universidad...
متن کاملPhyllosilicates and sulfates at Endeavour Crater, Meridiani Planum, Mars
[1] Phyllosilicates have been identified on the Martian surface from orbit, and are hypothesized to have formed under wet, non-acidic conditions early in the planet’s history. Exposures of these minerals have not yet been examined by a landed mission. Using Mars Reconnaissance Orbiter data, we report the detection of phyllosilicatebearing outcrops that may be accessible by the Mars Exploration ...
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ژورنال
عنوان ژورنال: Science
سال: 2004
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.1104559