Late Noachian development of the Coprates rise, Mars

Details Late Noachian development of the Coprates rise, Mars Late Noachian development of the Coprates rise, Mars

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept...70t&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 70-72 (SEE N92-10728 01-91)

Physics

Geophysics

Mars Surface, Photogrammetry, Radar Data, Tectonics, Terrain, Troughs, Asymmetry, Chronology, Kinematics, Mars Photographs, Planetary Evolution, Slopes, Viking Spacecraft

Scientific paper

The Coprates rise forms a 900 km long, north to northeast trending ridge south of Coprates Chasma between long. 56 and 60 degs. Radar and stereo photogrammetric data indicate that the rise is 2 to 4 km above a neighboring trough to the east. The break in slope between the rise and this trough is well defined topographically and in Viking images. In turn, the trough is bordered to the to the east at long. 52 deg by a much gentler rise. West of the Coprates rise, the terrain dips about 0.2 deg to roughly long. 75 deg. The rise and flanking highs were previously interpreted to be tilted fault blocks formed by either Tharsis tectonism or an ancient impact. Results are now reported of a preliminary geologic study that documents Late Noachian growth of the Coprates rise as a asymmetric fold. More comprehensive work will lead to a mechanical analysis of the kinematic development of the rise. It is concluded that the Coprate rise formed during the Late Noachian by 2 to 4 km of asymmetric uplift (steeper on its east flank). The timing is inconsistent with an origin by an early impact, but it coincides in time with early Tharsis centered radial faulting at Syria Planum.

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