Complex structure of the Thaumasia region of Mars

Details Complex structure of the Thaumasia region of Mars Complex structure of the Thaumasia region of Mars

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1399t&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1399-1400 (SEE N94-20636 05-91

Mathematics

Logic

1

Geological Faults, Mars Surface, Planetary Geology, Planetary Mapping, Structural Analysis, Tectonics, Highlands, Lithosphere, Plateaus, Structural Properties (Geology)

Scientific paper

The Thaumasia region was the first center of Tharsis tectonism, and it is the most complex and poorly understood. Therefore, a geologic map of the entire Thaumasia region (lat 15 deg to 50 deg S, long 50 deg to 115 deg), at 1:5,000,000 scale is being compiled. This region is mostly made up of the Thaumasia plateau, the highlands are fractured by Thaumasia, southern Claritas, Coracis, Melas, and Nectaris Fossae. Preliminary structural analysis of the most complexly faulted area in the region (the central part, at lat 30 deg to 45 deg S, long 80 deg to 100 deg) indicates that, unlike other regions of Mars, Thaumasia has undergone extensive deformation by both small- and large-scale extensional and compressional structures. These results indicate that the early (Noachian) style of tectonism commonly involved lithospheric-scale deformation, in contrast to most younger tectonism (which mainly affected the upper parts of the crust above mechanical discontinuities); this difference may be due to a weaker (and thus more readily deformable) early lithosphere in this region.

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