Результаты (
английский) 3:
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within the crust, there is a marked west–east increase in velocity that is a complex of the velocity feature in the mantle discussed in the preceding paragraph. this observation is suggestive of a change from felsic Precambrian crust in the west to more mafic crust of oceanic origin in the east, which is consistent with what we know of the Lachlan Orogen. however, young et al. (2013a) belongs to attribute the velocity change to the presence of the Escondida fault, which is located some 20 to 30 km west of the Moyston fault and has a similar strike just north of the NVP. they argue that the geometry of the velocity change is a better fit to the Escondida fault further north, as inferred from aeromagnetic data. in this scenario, the higher velocities in the lower crust in the world may be due to the presence of mafic igneous rift fill, with the Escondida fault in the surface expression of inverted passive margin basins that developed during Rodinian breakup.
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