Download A Continental Plate Boundary: Tectonics at South Island, New by David Okaya, Tim Stern, Fred Davey PDF

By David Okaya, Tim Stern, Fred Davey

Released by means of the yank Geophysical Union as a part of the Geophysical Monograph sequence, quantity 175.

A Continental Plate Boundary
bargains in a single position the main finished, updated wisdom for researchers and scholars to profit concerning the tectonics and plate dynamics of the Pacific-Australian continental plate boundary in South Island and concerning the software of recent geological and geophysical equipment. It examines what occurs whilst convergence and translation take place at a plate boundary by means of

  • Describing the geological and geophysical signature of a continental rework fault;
  • Identifying the varied vertical and lateral styles of deformation on the plate boundary;
  • Assessing an obvious seismicity hole at the plate boundary fault and fast-moving plate motions;
  • Comparing this plate boundary to different international convergent continental strike-slip plate boundaries;
  • Documenting the software of the double-sided, onshore-offshore seismic technique for exploration of a slim continental island; and
  • Providing extra papers offering formerly unpublished results.

This quantity will end up valuable for seismologists, tectonophysicists, geodesists and potential-field geophysicists, geologists, geodynamicists, and scholars of the deformation of tectonic plates.

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Additional info for A Continental Plate Boundary: Tectonics at South Island, New Zealand

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Yields vary across the Southern Alps from ca. 15,000 t/km/yr for the western side of the range, ca. 1600 t/km/yr for large basins draining the COx and Sutherland 37 east side of the divide, ca. 600 t/km/yr for basins in the eastern foothills, to ca. 100 t/km/yr for dry intermontane basins in the eastern rainshadow. In terms of mean ground lowering, values of the around 4–7 mm/yr are obtained for major valleys draining the western side of the Southern Alps which, despite well-developed forest cover, exceed those determined for most other parts of the world by an order of magnitude [Soons, 1986].

The Southern Alps were rapidly uplifted, a crustal root developed, and enormous volumes of schist and greywacke detritus spread across South Island. , 1989; Sircombe and Kamp, 1986]. Cover Sequence Constraints on Plate Motion The development of sedimentary sources and depositional centres is largely governed by vertical motion of land relative to sea level. Fault block interaction within a transform system such as the Australian-Pacific plate boundary inevitably results in vertical motion, although the total amount of horizontal motion may be considerably greater [Norris and Carter, 1982].

Although displacement rates are not precisely known, the total deformation distributed on these structures is insufficient to account for the 20-50% of plate motion that is not accommodated on the Alpine Fault. , 2006]. , 2007], but how, where and when this energy might be released is not known. , 2001] provide indirect, yet compelling, evidence that the “missing” component of plate boundary displacement probably occurs in the Southern Alps. COx and Sutherland 39 Whereas glaciers may have buried or swept the onshore alpine region clear of evidence of fault displacements, an extensive post-glacial surface was developed offshore and provides a marker of deformation.

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