DIVISION AND CHARACTERISTICS OF THE GEOTECTONIC UNITS OF YUNLING EPICONTINENTAL ARC IN NORTHWEST YUNNAN
WANG Xue-wu1, LIU Feng-xiang1, LI Xin-ren1, YAN Cheng-min2, ZHOU Xi-lin1, WANG Chang-bing1
1. No. 209 Geological Party, Yunnan Bureau of Geology for Nuclear Industry, Kunming 650031, China; 2. Regional Geological Survey Party, Yunnan Bureau of Geology and Mineral Resources, Kunming 653100, China
Abstract：With field survey and data processing, the structural characteristics of the Yunling epicontinental arc in Northwest Yunnan are clarified. This region is divided into 6 four-grade tectonic units, i.e. Xuelongshan Rock Group (Pt1Xl), Deqing Blocks (Pz1), Pantiange acidic volcanic magmatic arc (T2), Gongnong inter-arc basin (T2), Cuiyibi intermediate-basic volcanic magmatic arc(T1-2), and Ludian volcanic arc-syn-collisional granite(T). The former two units belong to the basements of island arcs; while latter four, the main bodies. The rock associations and deformation-metamorphism of each unit are various obviously. The main bodies of island arcs were formed from Early Triassic to early Late Triassic, as a product of the westward subduction and collisional orogeny of Jinshajiang ocean basin. The main bodies of island arcs are covered by Upper Triassic strata in angular unconformity.
王学武, 刘凤祥, 李新仁, 严城民, 周喜林, 王长兵. 滇西北云岭陆缘弧大地构造单元的划分与特征[J]. 地质与资源, 2017, 26(3): 229-233.
WANG Xue-wu, LIU Feng-xiang, LI Xin-ren, YAN Cheng-min, ZHOU Xi-lin, WANG Chang-bing. DIVISION AND CHARACTERISTICS OF THE GEOTECTONIC UNITS OF YUNLING EPICONTINENTAL ARC IN NORTHWEST YUNNAN. GEOLOGY AND RESOURCES, 2017, 26(3): 229-233.
2017, Vol. 26 
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