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Recently compiled and publically available continental-scale magnetic and, in some cases, gravity, much of the world, including North America, Australia, Antarctica, Russia, are now available. In addition, Western Mining Corp., Australia, is allowing access to their global magnetic and gravity databases that include Asia, Africa and South America. All of these data sets will provide a means of seeing through geologic as well as anthropogenic cover, such as vegetation, soil, desert sands, glacial till, man-made features, and water to reveal lithologic variations and structural features such as faults, folds, and dikes in the crystalline basement. In addition, the data sets can help constrain global plate reconstructions for a variety of supercontinents including the Neo-Proterozoic continent of Rodinia as well as earlier ones. The broad objective of this proposed major research effort is to use this unprecedented array of magnetic and gravity data sets to map regional geology, in particular, Precambrian crystalline basement, of selected continents. This regional geologic mapping can help constrain plate reconstructions, can provide tools to evaluate ore genesis and settings of mineral deposits.
| Finn, Carol A. | Box 25046 MS 964 Denver, CO 80225-0046 |
(303) 236-1425 cfinn@usgs.gov |
|---|
U.S.
Department of the Interior || U.S. Geological
Survey
