Physics – Geophysics
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rvgsp..19...13g&link_type=abstract
Reviews of Geophysics and Space Physics, vol. 19, Feb. 1981, p. 13-41. NASA-supported research.
Physics
Geophysics
237
Mars Volcanoes, Planetary Geology, Remote Sensing, Space Exploration, Viking Mars Program, Data Bases, Mars Photographs, Photogeology, Viking Lander Spacecraft, Viking Orbiter Spacecraft, Craters, Basalts, Formation, Deposits, Regolith, Magmas, Water, Mars, Volcanism, Composition, Review, Viking Lander, Data, Remote Sensing, Models, Geophysics, Lava, Analysis, Volcanoes, History, Maps, Flows, Plains, Stratigraphy, Photographs, Comparisons, Samples, Classification, Diagrams, Eruptions, Features
Scientific paper
In situ chemical analyses of Martian soil by the Viking lander indicate mafic to ultramafic source rocks, consistent with both remote sensing data indicating the presence of pyroxene and olivine and with petrologic modeling which suggests that Martian lavas are iron-rich and ultramafic. Photogeological analysis of the Martian surface reveals two types of volcanic morphology: (1) central volcanoes, developed by continued and prolonged eruption from a point source vent; and (2) volcanic plains, recognized by mare ridges and flow lobes. When these volcanic morphologies are combined with relative age data, a volcanic history may be derived that is consistent with a moonlike thermal history involving a lithosphere of increasing thickness with time which gradually suppresses the volcanism.
Greeley Ronald
Spudis Paul D.
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