Statistics – Computation
Scientific paper
Jan 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3501306a&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 1, CiteID L01306
Statistics
Computation
3
Exploration Geophysics: Continental Structures (8109, 8110), Exploration Geophysics: Computational Methods: Potential Fields (1214), Tectonophysics: Continental Tectonics: General (0905), Exploration Geophysics: Magnetic And Electrical Methods (5109)
Scientific paper
High resolution aeromagnetic data covering the polydeformed and poorly exposed Musgrave Province of Australia reveals the Grenville-aged crustal architecture. A combination of upward continuation and the potential field tilt filter out magnetic anomalies relating to a late Neoproterozoic orogenic event, and emphasize the more subtle magnetic structural grain formed during the ca. 1320-1150 Ma Musgravian Orogeny. The resulting images indicate that crustal architecture is defined by the distribution of ca. 1150 Ma magnetic granitoids within less magnetic basement and is dominantly northeast trending, continuous beneath the Amadeus and Officer basins, and defines an orogenic belt that connects Mesoproterozoic provinces. The orogenic belt is truncated within Australia and precludes a direct east trending connection between the Musgrave Province and contemporaneous orogens in Laurentia. Clockwise rotation of the South Australian Craton and subsequent collision with the North and West Australian cratons is our preferred model to explain the Grenville-aged architecture observed in Australia.
Aitken Alan R. A.
Betts Peter G.
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