T45 Impact Cratering on Earth and in the Solar System (Posters)

Sunday, 1 November 2015
9:00 AM - 5:30 PM
Exhibit Hall

MAPCIS, NEW IMAGING REVEALS DEEP STRUCTURE

Paper number: T45-6
Program: Technical Sessions
Time: 9:00 AM – 5:30 PM

Authors

Abstract

Massive Australian Precambrian-Cambrian Impact Structure (MAPCIS) a proposed impact continues to reveal itself. Advances in computer power and imaging are showing new detail in the deep gravity structure of the impact. We are now able to visualize the a more complete crater rim ~650km diameter, while eliminating most post impact adjunct structure likely produced by post-impact crustal shortening, notably from the Alice Springs Orogeny ~ 450Ma-300Ma. We are able to correlate the deep gravity structure with the exposed surface ring geology. We are able to show a detailed crustal thickness MOHO up-warp of 14km to 15.5km that corresponds with within the ring surface, deep gravity and associated central MASCON. This new information will be integrated with the eight years of MAPCIS research to support upgrading MAPCIS from a proposed impact, to a probable or highly probable impact.