The evolution of impact basins - Cooling, subsidence, and thermal stress

Details The evolution of impact basins - Cooling, subsidence, and thermal stress The evolution of impact basins - Cooling, subsidence, and thermal stress

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....9012415b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Dec. 10, 1985, p. 12,415-12,433.

Physics

44

Cooling, Impact Damage, Lunar Crust, Lunar Geology, Structural Basins, Subsidence, Thermal Stresses, Heating, Photographs, Tectonics, Topography

Scientific paper

The present study is concerned with an assessment of the contribution of thermal contraction and thermal stress to the topography and tectonics of large lunar impact basins. Exploratory models are developed, giving attention to the temperature structure following basin formation, the subsequent cooling of the basin region, and the resulting thermal displacements and stresses as functions of time. The subsidence and stress at the surface are compared with topography and tectonic features in the comparatively well-preserved Orientale basin. The results of the comparison are used as a basis to derive approximate constraints on the quantity and distribution of heat implanted during the basin-formation process.

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