Large Meteorite Impacts and Planetary Evolution V

Kinematics of large terrestrial impact crater formation inferred from structural analysis and three-dimensional block modeling of the Vredefort Dome, South Africa
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Published:October 01, 2015
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CiteCitation
Andreas Jahn, Ulrich Riller, 2015. "Kinematics of large terrestrial impact crater formation inferred from structural analysis and three-dimensional block modeling of the Vredefort Dome, South Africa", Large Meteorite Impacts and Planetary Evolution V, Gordon R. Osinski, David A. Kring
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Field-based structural analyses addressing the formation of large terrestrial impact structures are rare. We present a field-based kinematic analysis and a three-dimensional (3-D) block model of prominent structures from supracrustal strata of the Vredefort Dome, the central uplift of the Vredefort impact structure. This study aims to better understand the kinematics of complex crater formation. Specifically, the configuration of prominent concentric and radial faults supports the hypothesis that the Vredefort Dome formed by centripetal rock movement followed by radial spreading of uplifted rocks. Centripetal rock movement led to the formation of radially disposed transpression zones, whereby distorted supracrustal strata are...