Intracontinental subduction and hinged unroofing along the Salmon River suture zone, west central Idaho
Article Abstract:
The Salmon River suture in west central Idaho is a zone of intracontinental subduction, which occurred slowly, and also exhibits unroofing processes across the crustal boundary. Separate P-T paths are recorded by the Rapid River plate (RRP) and Pollock Mountain plates (PMP) on the west side of the Salmon River suture zone. The homogenization of garnet rims was prevented due to the rapid initial unroofing of the PMP. The RRP and PMP were placed side by side while the rocks were at high temperatures, and the detachment of thickened subcrustal lithosphere caused the upliftment of the RRP and PMP. There is an indication of a postmetamorphic, slow, hinged unroofing of the down warped and thickened crust near a north-south hinge line situated approximately 20 km to the west of the suture zone.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1992
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The Manokwari trough and the western end of the New Guinea Trench
Article Abstract:
The spreading of the seafloor in the Ayu Trough, after the completion of the subduction at the New Guinea Trench, has resulted in the formation of the Manokwari Trough and the termination of the New Guinea Trench. The Manokwari Trough is to the west of the Bird's Head region and has a few morphological features of the trenches at which subduction is taking place. The western end of the New Guinea Trench is situated about 600 kilometers east of the Philippine Trench and lies at the ridge system which culminates in Mapia Island.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1992
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Gold Butte crustal section, South Virgin Mountains, Nevada
Article Abstract:
The Gold Butte rock formation is a crystalline rock exposure located in the South Virgin Mountains of Nevada in the US. The block is composed of Proterozoic medium- to high-grade metamorphic and plutonic rocks, which are overlain by Paleozoic sedimentary rocks on its East side. The formation may have been part of an intact Proterozoic-Miocene crustal section and was exposed during tectonic denudation in Miocene time. Its geological features substantiate its identity as a crustal rock section.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1992
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