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Volume 17 (1) - 1994

UFIMTSEV G.F.

The continental rejuvenated mountain belts

Pages 87-101

Abstract

Continental rejuvenated mountains are represented by three types of mountain belts: the Mongolia-Siberian, Ural- Appalachian and margin-continental or East-Asian types. Orogenic belts of the Mongolia-Siberian type are when tectonic relief has clear paragenesis with deep structure. Mountain belts of the Ural-Appalachian type form in the zones of rapprochement of continental platform. Mountain belts of the East-Asian type are formed along the margins of intensive subsidences in the basins of the Pacific ocean marginal seas. The Central-Asian belt of rejuvenated mountains and the East-African rift system have no analogy in the continents. The former appears in a zone of intercontinental collision of lithospheric plates, but the latter is the only recently rejuvenated orogenic belt in the southern continents. The reasons and conditions for the formation of rejuvenated orogenic belts are diverse. Of great importance in their formation are the protrusions of asthenoliths (anomalous mantle) and inclined bedding of the asthenospheric roof, above which there is the development of zones of linear warping or narrow structural block uplifts.

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