Mountains orogeny

Mountain building usually involves compres-sional deformation of the crust. Studies of the physics of orogeny suggest that there is a feedback between the nature of the building process and denudation rates. Suppe (1981), Davis et al. (1983), and Dahlen et al. (1984) have modeled the effects of brittle deformation in accretionary fold-thrust mountain belts such as Taiwan and the Andes. The basis of their model is the hypothesis that rock deformation is governed... 

Willett S (1999) Orogeny and orography The effects of erosion on the structure of mountain belts. J Geophys Res 104(B12) 28,957-28,981... 

Tweto, Ogden, 1980, Summary of the Laramide Orogeny in Colorado, in Colorado Geology, H.C. Kent and K.W. Porter, eds.. Rocky Mountain Association of Geologists, Denver, Colorado, pp. 129-134. 

Orogeny is the process of mountain formation. Plate tectonics is the main force of nature responsible for orogeny. This continent-building process may be simply explained ... 

One special type of orogeny that can happen during a continental collision is the rise of ophiolite mountains. On rare occasions the crast beneath the ocean floor fractures along the tectonically active coast of a continent, and oceanic crust is thrast up over the shore and forms mountains. This spectacular form of plate-tectonic backfire is not supposed to happen, yet it does often enough to have its own name obduction, meaning over (ob-) leading (-duction). A piece of oceanic crast, and the... 

Orogeny is the term given to natural mountain building. 

This model successfully integrates structural, stratigraphic, and geochronological data from several areas along the Transantarctic Mountains... and it is consistent with the independent conclusion that Beardmore Group deformation is but one manifestation of a protracted plate-tectonic continuum referred to as the Ross Orogeny. 

Pankhurst RJ, Storey BC, Millar IL, Macdonald DIM, Vennum WR (1988) Cambrian-Ordovician magmatism in the Thiel Mountains, Transantarctic Mountains, and implications for the Beardmore Orogeny. Geology 16(3) 246-249 Peacock SM, Goodge JW (1995) Eclogite facies metamorphism preserved in tectonic blocks from a lower crustal shear zone, central Transantarctic Mountains, Antarctica. Lithos 36 12-13... 

The U-Pb dates of zircons in granites on ML Webster and in the Berry Peaks (494 3 and 480 5 Ma, respectively) indicate that the age of these granites is Early Ordovician and that they crystallized at the end of the Ross Orogeny. The gneisses in the Fallone Nunatak contain old xenocrystic zircons that may have been derived from Neoproterozoic Grenville basement that could have existed in the crustal magma sources off-shore of the paleo-Pacific coast of the present Transantarclic Mountains (McKenna etal. 1994 Dalziel 1992). 

Borg SG (1983) Petrology and geochemistry of the Queen Maud batholith, central Transantarctic Mountains, with implications for the Ross Orogeny. In Oliver RL, James PR, Jago JB (eds) Antarctic earth science. Australian Academy of Science, Canberra, pp 165-169... 

The date indicates that these rocks were erupted during the Middle Cambrian Epoch. This revision of the geologic history of the Transantarctic Mountains indicates that the volcanic rocks of the Wyatt Formation were erupted at the surface of the Earth or intruded at shallow depth during the active phase of the Ross Orogeny and that the rocks probably cooled rapidly compared to the deep-seated granitic plutons of the Wisconsin... 

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