The dispersal of pyroclasts from ancient explosive volcanoes on Mars: Implications for the friable layered deposits
نویسندگان
چکیده
A number of voluminous, fine-grained, friable deposits have been mapped on Mars. The modes of origin for these deposits are debated. The feasibility for an origin by volcanic airfall for the friable deposits is tested using a global circulation model to simulate the dispersal of pyroclasts from candidate source volcanoes near each deposit. It is concluded that the Medusae Fossae Formation and Electris deposits are easily formed through volcanic processes, and that the Hellas deposits and south polar pitted deposits could have some contribution from volcanic sources in specific atmospheric regimes. The Arabia and Argyre deposits are not well replicated by modeled pyroclast dispersal, suggesting that these deposits were most likely emplaced by other means. 2012 Elsevier Inc. All rights reserved.
منابع مشابه
The Dispersal of Pyroclasts in the Martian Atmosphere
Introduction: The Medusae Fossae Formation (MFF) is an enigmatic and discontinuous formation located in the southern parts of Elysium Planitia and Amazonis Planitia (130°-230°E and 12°S-12°N), covering an area of approximately 2.1 x 10 km and having an estimated volume of 1.4 x 10 km [1]. It is thought to have been deposited during the Amazonian period [2,3]. However, much of the cratering reco...
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0019-1035/$ see front matter 2012 Elsevier Inc. A http://dx.doi.org/10.1016/j.icarus.2012.11.037 ⇑ Corresponding author. Fax: +33 06 41 67 41 62. E-mail address: [email protected] (L. Kerber). A planetary global circulation model developed by the Laboratoire de Météorologie Dynamique (LMD) was used to simulate explosive eruptions of ancient martian volcanoes into paleo-atmospheres with high...
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