Thermal evolution of a portion of the Sevier hinterland: the northern Ruby Mountains-East Humboldt Range and Wood Hills, northeastern Nevada

Article Abstract:

Conventional thermobarometry and Gibb's Method modeling are used to examine eight representative pelitic samples from the northern Ruby Mountains, East Humboldt Range and Wood Hills and northeastern Nevada to understand the thermal evolution of the region of Sevier Hinterland. Tectonic denudation, related to the relaxation of large topographic gradients produced by crustal thickening in the hinterland of the Sevier orogen, may have led to the unroofing in the Clover Hill area, where approximately 20 km of overburden was stripped off before the final mineral rim equilibration in Cretaceous time. Other parts of the Ruby Mountains-East Humboldt Range metamorphic complex have significantly higher temperatures than the Clover-Hill-Wood Hills block.

Analysis, Influence, Nevada, Plate tectonics, Temperature

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Southward extrusion of Tibetan crust and its effect on Himalayan tectonics

Article Abstract:

It has been established that the distribution of gravitational potential energy in the Himalayan-Tibetan orogenic system encourages the localization of extremely efficient dissipation processes along the Himalayan orogenic front. Significant amounts of energy are dissipated through linked deformational and erosional activity involving southward extrusion of the middle crust from under the Tibetan Plateau.

Tibet, Himalaya Mountain Region

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Uplift and convergence along the Himalayan Frontal Thrust of India

Article Abstract:

Fluvial terrace deposits along the Himalayan Frontal Thrust near Dehra Dun were mapped and surveyed to gain an understanding of the Holocene rate of uplift and shortening across the front of the Indian Himalaya. The occurrence of a possible fault scarp suggests that past earthquakes were sufficiently large to rupture to the surface, producing coseismic scarps.

Thrust faults (Geology), Thrust faults, Himalaya Mountains

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