Geophysical anomalies and quartz microstructures, Eastern Warburton Basin, North-east South Australia: Tectonic or impact shock metamorphic origin?
The Eastern Warburton Basin, Northeast South Australia, features major geophysical anomalies, including a magnetic high of near-200. nT centred on a ~. 25. km-wide magnetic low (<. 100. nT), interpreted in terms of a magmatic body below 6. km depth. A distinct seismic tomographic low velocity anomaly may reflect its thick (9.5. km) sedimentary section, high temperatures and possible deep fracturing. Scanning electron microscope (SEM) analyses of granites resolves microbreccia veins consisting...[Show more]
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