GEOLOGICAL CHARACTERISTICS AND METALLOGENIC IMPLICATION OF THE INTRUSIVE ROCKS IN SHALIUHE OREFIELD, QINGHAI PROVINCE
ZHANG Yu1,2, MA Guo-dong2,3, LI Bi-le1, MA Fu-gui4, JIA Jian-tuan5
1. College of Earth Sciences, Jilin University, Changchun 130061, China; 2. Qinghai Bureau of Geological Survey, Xining 810000, China; 3. Qinghai No.1 Institute of Geology and Mineral Resources Exploration, Haidong 810600, Qinghai Province, China; 4. Qinghai No.5 Institute of Geology and Mineral Resources Exploration, Xining 810000, China; 5. Qinghai Qaidam Institute of Geology and Mineral Resources Exploration, Xining 816000, China
Abstract：The Shaliuhe tungsten-tin orefield in Qinghai Province, tectonically belonging to the eastern margin of the Caledonian synclinorium fold belt in northern Qaidam Basin, is broadly intruded by Indosinian rocks. With discussion on the composition, lithology and petrochemistry of intrusive rocks, this paper analyzes the relationship between the rocks and the W-Sn metallogenesis. The result shows that the ore-forming rock in the orefield is dominated by biotite monzogranite, belonging to S-type of weak alkaline-peralkaline silica-aluminum supersaturated granite, with various kinds of accessory minerals. The Pb, Zn, W and Sn contents in the rock are 1.5-3.3 times higher than the world average values of granite, suggesting that the intrusive rock in the area is the material source for W-Sn mineralization. The granite is analyzed with the approaches of (K+Na)-Si correlation diagram, SiO2-(CaO+MgO+FeO)-(Na2O+K2O+Al2O3) phase diagram and differentiation index histogram. It is concluded that the porphyraceous biotite monzogranite in the orefield shows great similarity to the W-Sn ore-forming rocks both in China and abroad in lithology, petrochemistry, composition and forming time, to be a favorable metallogenic parent rock.
张钰, 马国栋, 李碧乐, 马福贵, 贾建团. 青海沙柳河矿区侵入岩地质特征及成矿意义[J]. 地质与资源, 2017, 26(2): 134-139.
ZHANG Yu, MA Guo-dong, LI Bi-le, MA Fu-gui, JIA Jian-tuan. GEOLOGICAL CHARACTERISTICS AND METALLOGENIC IMPLICATION OF THE INTRUSIVE ROCKS IN SHALIUHE OREFIELD, QINGHAI PROVINCE. GEOLOGY AND RESOURCES, 2017, 26(2): 134-139.
2017, Vol. 26 
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