The motion of crustal blocks driven by flow of the lower lithosphere and implications for slip rates of continental strike-slip faults
Article Abstract:
Continental lithosphere is weak and its lower crust and upper mantle probably deform in a ductile way, although the upper crust is discontinuous, with fault slip accommodating the motions of crustal blocks. One view is that the lithosphere deforms in a distributed way and this was investigated in two plate-boundary zones the Marlborough fault zone in New Zealand and Southern California, south of the Transverse Ranges. Geodetic measurements predicted slip rates on the faults in good agreement with geologically determined slip rates.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Prospecting for Jurassic slabs: Increasingly precise seismic imaging of the Earth's deep interior continues to sharpen our understanding of mantle convection and plate tectonics
Article Abstract:
Seismic tomography is the method of analyzing seismic waves travelling through the Earth. It has shown that organized concentrated downwelling and upwelling structures affect the flow in the Earth's mantle. Van der Voo and colleagues have made a connection between a major high-velocity anomaly below Siberia and the subduction of an oceanic plate during Jurassic times. This supports the concept that some slabs sink to the bottom of the mantle, and shows how powerful seismic tomography is as a tool for paleogeography.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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