gravity
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Legacy product - no abstract available
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Legacy product - no abstract available
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Australia, via the efforts of the Government geological surveys, has a program of releasing ever bigger, higher- resolution, continental-scale datasets. The recently released isostatically corrected gravity data images many deep and large-scale crustal features. This is a key dataset for understanding the primary structure of the deep crust across thousands of kilometres. Direct "inversion" of this dataset to a consistent 3D fault surfaces network explains more than 50% of the primary information. The method of choice relies on multi-scale edge detection or "worming". This continues to prove effective in the regional mapping domain. Large-scale minerals and oil exploration mapping often make use of this technique. With the current shift to 3D geology modelling, issues arise to improve/generalise the worming technology and get 3D contacts that can be interpreted, particularly the sub-set that indicates a primary fault network. New methods result in gathering related worms to rapidly compute a consistent 3D fault network for the entire Australian continent by linking the dominant 30 km deep features back to the surface. If measured gravity curvature gradients are available an even better, more detailed use of these methods at the prospect scale is now available.
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No abstract available