A deep crustal shear zone exposed in western Fiordland, New Zealand
Article Abstract:
A newly found crustal shear zone in western Fiordland, New Zealand, is about 180-km-long, deep and formed at a depth of 40 km. The thickness of the zone is about 3 to 4 km at present. Continental extension between 116 and 100 Ma caused formation of the shear zone. Two sets of gneisses with unrelated deformation histories have this zone as a main tectonic boundary. There is noncoaxial deformation and a top-to-the NE sense of shear.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1995
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Caledonian deformation upon southwest Baltica and its tectonic implications: alternatives and consequences
Article Abstract:
The geophysical and geological properties of Caledonian deformation in southwestern Baltic Shield are investigated. Two models for the Caledonian orogeny and the docking of East Avalonia are proposed. The first model supports the theory of a huge terrane accretion to Baltica's southwest. The second model posits the development of a passive margin from the Lower Cambrian onwards.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1996
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- Abstracts: Paleomagnetic evidence for en echelon crustal extension and crustal rotations in western Montana and Idaho. Implications of paleomagnetic data on Miocene extension near a major accommodation zone in the Basin and Range province, northwestern Arizona and southern Nevada
- Abstracts: Archean continental assembly in the southeastern Superior Province of Canada. A possible southeastern extension of the Midcontinent Rift System located in Ohio