Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.294..305h&link_type=abstract
Nature, vol. 294, Nov. 26, 1981, p. 305-307.
Astronomy and Astrophysics
Astronomy
Mars Volcanoes, Volcanology, Albedo, Astronomical Models, Spectral Reflectance, Subduction (Geology), Terrain Analysis, Viking Mars Program, Olympus Mons, Tyrrhena Patera, Syritis Major Planitia, Isidis Planitia, Ascraeus Mons, Mars, Volcanism, Composition, Heat, Interiors, Deposits, Comparisons, Morphology, Volcanoes, Features, Characteristics, Cones, Classification, Shields, Remote Sensing, Eruptions, Theoretical Studies, Distribution, Stratigraphy, Magmas, Chronology
Scientific paper
Characterization of volcanic activity on Mars is reviewed and comparisons are made with knowledge of terrestrial volcanic history. The high frequency of calderas on earth and low abundance on Mars is taken to indicate a lack of plate tectonic subduction zones and silicic volcanism on Mars. Further characterization is noted to depend on remote sensing from Viking orbital and earth-based spectral and albedo data. Theoretical models of causative mechanisms of terrestrial morphology will be used to establish models of similar processes on Mars, including deposits identification, eruptive conditions, and theories of magma ascent, as well as the role of volatiles from both deep and shallow sources. The importance of returning to Mars with appropriately instrumented spacecraft to test the new theories is stressed. The topics were discussed in papers presented at the Mars colloquium at the California Institute of Technology in August, 1981.
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