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Dec. 1998 Abstract of Acta Geologica Sinica (Chinese Edition) Vol. 72, No. 4,1998 lntergrated Study of the Colmud-Ejin Ceoscience Transect W U Gongjian (Institute of Geology, CAGS, Beijing, 100037) The Golmud-Ejin geoscience transect traverses the Kunlun, Qilian and Northern Beishan tectonic belts from south to north. In the geoscience transect, five tectostratigraphic terranes, i.e. the Qaidam-North Kunlun, South-central Qilian, North Qilian, Southern Beishan and Northern Beishan terranes, and five terrane boundary faults, i.e. the Central Kunlun fault, North JunOl fault, North boundary fault of Central Qilian, Kuantanshan fault and Skibanjing-Xiao Huangshan boundary fault, may be distinguished. The Moho depth is 50-70 km and reaches a maximum of 74 km in the Juhong Tu area south of the Har Lake in the Southern Qilian, indicating the existence of the mountain root there. The thickness of the lithosphere is 140-150 k n The Landsat images and continental seismic reflection profiling indicate that the Qinghai-Tibet plateau is an independent lithospheric tectonic unit. The northern boundary of the plateau should be the Kuantanskan fault, which is most likely to the eastward extension of the Altun fault. The stress field model calculation indicates that the uplift of the Qilian Mountains mainly resulted from
Acta Geologica Sinica (English Edition) – Wiley
Published: Dec 1, 1998
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