Read e-book online Active Tectonics and Seismic Potential of Alaska PDF

By Jeffrey T. Freymueller, Peter J. Haeussler, Robert L. Wesson, Göran Ekström

ISBN-10: 0875904440

ISBN-13: 9780875904443

ISBN-10: 1118666399

ISBN-13: 9781118666395

Published by means of the yank Geophysical Union as a part of the Geophysical Monograph Series.

This multidisciplinary monograph presents the 1st sleek integrative precis concerned about the main brilliant lively tectonic structures in North America.

Encompassing seismology, tectonics, geology, and geodesy, it comprises papers that summarize the country of data, together with heritage fabric for these strange with the area; tackle international hypotheses utilizing information from Alaska; and attempt vital international hypotheses utilizing information from this region.

It is geared up round 4 significant themes:

  • subduction and nice earthquakes on the Aleutian Arc,
  • the transition from strike slip to accretion and subduction of the Yakutat microplate,
  • the Denali fault and similar constructions and their function in accommodating everlasting deformation of the overriding plate, and
  • regional integration and large-scale types and using information from Alaska to handle very important international questions and hypotheses.

The book's book close to the start of the nationwide technological know-how Foundation's EarthScope venture makes it specifically well timed simply because Alaska could be the least understood zone in the EarthScope footprint, and curiosity within the sector might be anticipated to upward push with time as extra EarthScope info develop into available.


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Additional info for Active Tectonics and Seismic Potential of Alaska

Sample text

These structures are most prominent from the Richardson Highway/Trans-Alaska Pipeline crossing at longitude 145°W, west to the western edge of the Kantishna Hills at longitude 152°W. The existence of the Bering plate offers an alternative, or additional, mechanism to drive convergence across this segment of the Alaska Range. , this volume]. , this volume]. The block model also predicts a westward decrease in the slip rate on the Denali fault, as long as the north side of the Denali fault is part of the Bering plate rather than North America.

The models presented by Lundgren et al. [1995] show two main features. First, in western and southwestern Alaska, the models show the region south of the Denali fault moving to the west or southwest. There is some indication of rotation in the model velocity vectors. This feature is in reasonable agreement with the later GPS observations. Second, inland from southeastern Alaska the models show a large region moving rapidly to the north–northwest, extending inboard from the Yakutat terrane collision.

Along-strike subduction zone variations in Alaska. The Alaska subduction zone displays strong along-strike variations in the behavior of the shallow seismogenic zone. , 2002]. Models for the slip deficit distributions for segments comprising most of the Alaska–Aleutian arc are found in the previously cited papers, and results of these models are summarized in Plate 3. Dark shaded regions in the figure indicate areas of significant slip deficit (locked regions), whereas yellow shaded regions are dominantly or entirely creeping, and other regions have too little data to tell.

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Active Tectonics and Seismic Potential of Alaska by Jeffrey T. Freymueller, Peter J. Haeussler, Robert L. Wesson, Göran Ekström

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