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Venus orogenic belt environments: Architecture and origin

1990; American Geophysical Union; Volume: 17; Issue: 9 Linguagem: Inglês

10.1029/gl017i009p01337

1944-8007

J. W. Head, Richard W. Vorder Bruegge, L. S. Crumpler,

Geological and Geochemical Analysis

Orogenic belt environments (Danu, Akna, Freyja, and Maxwell Montes) in Western Ishtar Terra, Venus, display a range of architectural elements, including (from the center of Western Ishtar outward) an inboard plateau (Lakshmi Planum), the linear orogenic belts themselves, outboard plateaus, steep scarps bounding Ishtar, adjacent linear foredeeps and outboard rises, and outboard low‐lying volcanic plains. The main elements of the architecture are interpreted to be due to the convergence, underthrusting, and possible subduction of lowland plains at the margins of a preexisting tessera plateau of thicker crust.