7Th Gold Detachment of Chinese Armed Police Force

Yantai, China

7Th Gold Detachment of Chinese Armed Police Force

Yantai, China
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Yuan X.,1.514 Brigada of North China Geological Exploration Bureau | Ren J.,1.514 Brigada of North China Geological Exploration Bureau | Sun J.,7th Gold Detachment of Chinese Armed Police Force | Xue Y.,1.514 Brigada of North China Geological Exploration Bureau | And 3 more authors.
Northwestern Geology | Year: 2015

The Beisanduan mining area is located in the northern margin of North China platform, where has good regional metallogenetic condition. There are lots of gold deposits and other poly metallic deposits in the region. After comparing and discriminating the geochemical data of monzogranite and alkali granite in the Beisanduan mining area with the various types of graniteat home and abroad, the granite in Beisanduan mining area is classified as A type granites, which is rich in Si and alkali, and is poor in Mg. The trace elements (Sr, P, Eu and Ti) present a trough, and the REE patterns show right deviation type, with a typical style of A-typegranite. These granites may be formed in the extension and thinning environment afterorogenic movement. The reduction of local pressure and upwelling of asthenosphere have played a certain role in the partial melting of crust, providing the conditions for the formation of granite.


Liu X.-H.,7Th Gold Detachment of Chinese Armed Police Force | Niu S.-Y.,Shijiazhuang University of Economics | Zhang X.-H.,Wuhan University | Li B.-F.,7Th Gold Detachment of Chinese Armed Police Force | And 4 more authors.
Northwestern Geology | Year: 2013

Halaqi region is located in Southwest Tianshan-Northwest Tarim Basin. It's the front region of collision between Tarim Block and Kazakhstan-Siberia Block. Cambrian-Permian strata with slight metamorphism outcropped in this area, where we discover three unconformity surfaces, namely angular unconformity in Permian-Cenozoic, parallel unconformity in Ordovician-Silurian and parallel unconformity in Devonian-Carboniferous. The unconformity is bordered by A'erpaqueyiqieke vault anticlinorium. The sedimentary environment on both sides of Silurian-Permian is greatly different. The metamorphism in Ordovician and Cambrian composed of anticline is different from that of overlying strata. According to regional geology and evolution, the parallel unconformity in Ordovician-Silurian was corresponding to the regional Qilian Movement. The parallel unconformity in Devonian-Carboniferous was corresponding to the middle Tianshan Movement. The angular unconformity in Permian-Cenozoic was influenced by the end of Tianshan Movement.

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