Discovery of Tectonic Melange Belt in the Yushugou-Tonghuashan Area and Its Significance
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P542 P548.2

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    Abstract:

    The Yushugou-Tonghuashan area is a typical example of complex structure in orogenic belt. There are varieties of geological mass formed in different high-levels and they undergone different metamorphisms. Based on a comprehensive remote sensing structural analysis, the whole district can be subdivided into three structural belts, namely southern and northern metamorphic fold stratigraphic system, central tectonic mixed system and multi-stage intrusives. Isotopic dating of metamorphics and comparative analysis of rock types, tectonic block types and the characteristics of deformation further indicate that this area experienced five tectonic stages: (1) N-S overthrusting; (2) WNW-ESE trending sinistral strike-slipping; (3) WNW-ESE trending dextral strike-slipping; (4)N-S overthrusting; and (5) NNW and NE late-stage faulting.

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LU Guanxiang, ZHOU Dingwu, WANG Juli, ZHANG ChengliInstitute of Environmental Science, Normal University of Beijing, Beijing, Geological Department of North-west University, Xi''''an,.2004. Discovery of Tectonic Melange Belt in the Yushugou-Tonghuashan Area and Its Significance[J]. Geological Review,50(2):120-.

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