Basalt Thickness in Mare Humorum: New Method and Results

Details Basalt Thickness in Mare Humorum: New Method and Results Basalt Thickness in Mare Humorum: New Method and Results

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..179b&link_type=abstract

Lunar and Planetary Science, volume 27, page 179

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1

Basalt, Humorum

Scientific paper

Basalt thicknesses in mare basins have been determined using assumptions about the pre-mare topography of partly buried craters. Differences in those assumptions have led to a factor of two difference in mare thickness estimates. Further, knowledge of thickness is restricted to areas in which buried craters are present. We have shown that craters in the mare sometimes excavate highland material from below the mare cover. Using such craters, and assumptions about their depth of excavation, we can obtain independent estimates of basalt thickness. This method allows testing of pre-mare crater topography models employed in the buried crater method, adds significantly more data points for development of isopach maps, and allows determining of thickness of stratigraphic layers other than mare basalts such as melt sheets where compositional contrast is present.

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