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Extra resources for Paleozoic and Mesozoic tectonic evolution of central Asia: from continental assembly to intracontinental deformation, Nummer 194
On granitic mylonite (sample J5 in Figs. 3 and 6). 6 Ma, and our K-feldspar spectrum shows compatible high-temperature step ages of ca. 270 Ma decreasing serially into low-temperature step ages indicating either thermal or deformational disturbance ca. 170 Ma. The Erbin Shan consists of granite intruded in siliciclastic and carbonate strata bearing Devonian coral and brachiopod fossils (XBGMR, 1993; Fig. 5) exposed along the southern margin of the central Tian Shan block (Fig. 2). A U-Pb zircon age of 378 Ma from the Erbin Shan granite was reported by Hu et al.
One interval of high-densityturbidite sandstone in particular displays excellent normally graded bedding with gravel and pebbles at the bottom composed of coral and crinoid fossils (Fig. 4B), cemented fossil aggregates, and lithic sandstone rich in volcanic fragments. Well exposed along the Du-Ku Highway at Luweigou (Fig. 3, A-B) and along strike several kilometers to the east at Bayingou (Fig. 2) are ophiolitic rocks incorporated within the folded and faulted volcanic and volcaniclastic rock of the north Tian Shan.
The Erbin Shan consists of granite intruded in siliciclastic and carbonate strata bearing Devonian coral and brachiopod fossils (XBGMR, 1993; Fig. 5) exposed along the southern margin of the central Tian Shan block (Fig. 2). A U-Pb zircon age of 378 Ma from the Erbin Shan granite was reported by Hu et al. (1986). Lower Carboniferous siliciclastic and carbonate strata bearing brachiopod, coral, and fusulinid fossils of the Visean Stage (XBGMR, 1991) unconformably overlie the Erbin Shan granite, with a basal conglomerate consisting exclusively of granitic clasts (Figs.