Title What can potential field data really tell us about continent-ocean transitions?
Author Williams, S.; Whittaker, J.; Mazur, S.
Author Affil Williams, S., University of Sydney, School of Geosciences, EarthByte Group, Sydney, N.S.W., Australia
Source Future discoveries are in our hands; 21st international geophysical conference and exhibition; extended abstracts. 5p. ; [21st international geophysical conference and exhibition, ASEG-PESA 2010, Sydney, N.S.W., Australia, Aug. 22-26, 2010]; Petroleum Exploration Society of Australia, West Perth, West. Aust. Publisher: Australian Society of Exploration Geophysicists, Perth, West. Aust., Australia
Publication Date 2010
Notes In English. Poster abstract no. 37. Summary also published in Preview no. 147, August 2010, p. 119-120. 26 refs. GeoRef Acc. No: 308364
Index Terms Australia--South Australia; Antarctica- -Wilkes Land; Antarctica; Australasia; Australia; continent-ocean boundary; continental margin; crust; geophysical methods; geophysical surveys; gravity anomalies; gravity methods; magnetic anomalies; magnetic methods; passive margins; plate boundaries; plate tectonics; potential field; reconstruction; rift zones; rifting; South Australia; surveys; Wilkes Land
Abstract We investigate the ability of gravity and magnetic data to define the distribution of crustal types at continental margins, with specific focus on the conjugate Australia- Antarctica margins. Previous studies have used features in gravity maps as a proxy for the pre-rift location of plate boundaries. Instead, we discuss the use of potential field data to define the boundaries of stretched continental crust on a regional scale, and demonstrate this process for the conjugate margins of South Australia and Antarctica. In a companion paper (Whittaker et al, 2010) we show how these boundaries are used along with estimates of crustal thickness to determine the location of the plate boundaries prior to rifting, and ultimately to derive full-fit plate tectonic reconstructions.
Publication Type monograph
Record ID 91083