منابع مشابه
Elemental composition of the Martian crust.
The composition of Mars' crust records the planet's integrated geologic history and provides clues to its differentiation. Spacecraft and meteorite data now provide a global view of the chemistry of the igneous crust that can be used to assess this history. Surface rocks on Mars are dominantly tholeiitic basalts formed by extensive partial melting and are not highly weathered. Siliceous or calc...
متن کاملAndesites in the Primitive Martian Crust: Products of Hydrous
Introduction: Deconvolution of thermal emission spectra from Mars orbiting spacecraft, in-situ analysis of martian rocks by Mars Pathfinder, Spirit and Opportunity rovers, as well as investigation of martian meteorites, all point towards a wide magmatic diversity at the surface of the planet. Compositions varying from olivine-rich basalt to high-silica granite / rhyolite through basaltic andesi...
متن کاملBasalt versus Andesite in the Martian Crust : New Geochemical Perspectives
Introduction: Data from the MGS Thermal Emission Spectrometer (TES) has shown that surface type 1 (ST1) materials, interpreted as basalt, dominate the ancient crust in the southern highlands of Mars [1]. Large expanses of surface type 2 (ST2) materials in the northern lowlands have been variously interpreted as andesite [1, 2], oxidized crystalline basalt [3], or partly weathered basalt [4]. Th...
متن کاملConstraints on the composition and petrogenesis of the Martian crust
[1] Spectral interpretation that silicic rocks are widespread on Mars implies that Earth’s differentiated crust is not unique. Evaluation of observations bearing on the composition of the Martian crust (Martian meteorite petrology and a possible crustal assimilant, analysis of Mars Pathfinder rocks, composition of Martian fines, interpretation of spacecraft thermal emission spectra, and inferre...
متن کاملShock Metamorphism of Martian Meteorites: New Data from Quantitative Shock
Introduction: The Martian origin of the group of SNCOs comprising now 16 different meteorites is widely accepted [1]. The ejection of these meteorites from Mars requires an impact process which necessarily involves a certain level of shock metamorphism affecting the meteorites to get accelerated to Martian escape velocity. Previous studies [2 and ref. in 1] clearly showed that all 16 Martian m...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2014
ISSN: 1086-9379
DOI: 10.1111/maps.12330