Composition, Morphology, and Stratigraphy of Noachian Crust around the Isidis basin
نویسندگان
چکیده
منابع مشابه
Composition, Morphology, and Stratigraphy of Noachian Crust around the Isidis basin
[1] Definitive exposures of pristine, ancient crust on Mars are rare, and the finding that much of the ancient Noachian terrain on Mars exhibits evidence of phyllosilicate alteration adds further complexity. We have analyzed high-resolution data from the Mars Reconnaissance Orbiter in the well-exposed Noachian crust surrounding the Isidis basin.We focus on data from the Compact Reconnaissance I...
متن کاملStratigraphy of Noachian-aged Crust in the Nili Fossae-syrtis-isidis Region
Introduction: Defining the nature of the early crust on Mars remains a challenging problem due to the breadth of time and processes that have acted upon it. Concepts of planetary evolution and geophysical modeling suggest that primary crust may have originally formed during cooling of a magma ocean or by serial magmatism [1]. Most consider this early crust to have been broadly basaltic in compo...
متن کاملGeology of the Isidis Basin, Mars
Introduction: Building on Bridges et al. [2003], we are currently studying the general geologic history and evolution of the Isidis basin based on topographic and imaging data obtained by orbiting spacecraft such as Mars Global Surveyor (MGS) and Mars Odyssey. This study complements our recently completed analyses on Syrtis Major to the west [Hiesinger and Head, 2003] and the transition between...
متن کاملDikes of distinct composition intruded into Noachian-aged crust exposed in the walls of Valles Marineris
[1] Valles Marineris represents the deepest natural incision in the Martian upper crust. Previous studies showed that the upper parts of the walls were made of finely layered probable basalts in most of the chasmata, while the base of the stratigraphy reveals primary Noachian crustal blocks. Exposures of pristine Noachian bedrock are rare on Mars, and mostly observed outside of their geological...
متن کاملMineralogy of the Nili Fossae region with OMEGA/Mars Express data: 1. Ancient impact melt in the Isidis Basin and implications for the transition from the Noachian to Hesperian
[1] The Nili Fossae region located on the northwestern quadrant of the Isidis Basin, Mars, displays superb exposures of bedrock outcrops that reveal mineralogy and composition of the crust. Previous work has shown that this region exhibits the largest exposures of olivine-dominated rock units on Mars. Visible-infrared imaging spectrometer data acquired by OMEGA were calibrated to surface reflec...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 2009
ISSN: 0148-0227
DOI: 10.1029/2009je003349