| Título: | New evidence for a magmatic influence on the origin of Valles Marineris, Mars |
| Autores: | Dohm, James M. ; Williams, Jean-Pierre ; Anderson, Robert C. ; Ruiz Pérez, Javier ; McGuire, Patrick C. ; Komatsu, Goro ; Davila, Alfonso F. ; Ferris, Justin C. ; Baker, Victor R. ; Boynton, William V. ; Fairén, Alberto G. ; Hare, Trent M. ; Miyamoto, Hirdy ; Tanaka, Kennth L. ; Wheelock, Shawn J. |
| Tipo de documento: | texto impreso |
| Editorial: | Elsevier Science Publishers, 2009 |
| Dimensiones: | application/pdf |
| Nota general: | info:eu-repo/semantics/openAccess |
| Idiomas: | |
| Palabras clave: | Estado = Publicado , Materia = Ciencias: Geología: Geodinámica , Tipo = Artículo |
| Resumen: |
In this paper, we show that the complex geological evolution of Valles Marineris, Mars, has been highly influenced by the manifestation of magmatism (e.g., possible plume activity). This is based on a diversity of evidence, reported here, for the central part, Melas Chasma, and nearby regions, including uplift, loss of huge volumes of material, flexure, volcanism, and possible hydrothermal and endogenic-induced outflow channel activity. Observations include: (1) the identification of a new N50 km-diameter caldera/vent-like feature on the southwest flank of Melas, which is spatially associated with a previously identified center of tectonic activity using Viking data; (2) a prominent topographic rise at the central part of Valles Marineris, which includes Melas Chasma, interpreted to mark an uplift, consistent with faults that are radial and concentric about it; (3) HiRISE-identified landforms along the floor of the southeast part of Melas Chasma that are interpreted to reveal a volcanic field; (4) CRISM identification of sulfate-rich outcrops, which could be indicative of hydrothermal deposits; (5) GRS K/Th signature interpreted as water–magma interactions and/ or variations in rock composition; and (6) geophysical evidence that may indicate partial compensation of the canyon and/or higher density intrusives beneath it. Long-term magma, tectonic, and water interactions (Late Noachian into the Amazonian), albeit intermittent, point to an elevated life potential, and thus Valles Marineris is considered a prime target for future life detection missions. |
| En línea: | https://eprints.ucm.es/id/eprint/10517/1/27-Marte_11.pdf |
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