小秦岭金(钼)矿田北矿带推覆构造演化与成矿作用

Abstract

Abstract: The authors have carried out on faults with near EW-trending, controlling gold ores, by recent field work at Qiaoshangzhai, Linghu, Dahu and Qinnan-Taiyanggou gold deposits from the northern metallogenic belt in Xiaoqinling gold (molybdenum) province, Henan Province. Felsic mylonite and tectonic cataclastic rocks are predominated in this fault. The S-C fabric in felsic mylonite and angle of cleavage with fault plane are an indicative of reversal fault. This fault is offset and intercepted with each other in plan. The field evidence suggests that the fault system with near EW-trending, which is composed of, from north to south, F₁, F₈, F_{7, F₃₅, F₅, and F₆, is an overtrust fault system in northern metallogenic belt in the area. These faults are controlling the formation of gold deposits, in part which auriferous quartz vein is deformed as banded texture, suggesting that this fault is formed before the time 123 Ma. Later faults corresponding to hill fault are normal fault, and destroyed the gold ores in the area.}

Key words: ore-controlling fault, overthrust, gold deposits, northern belt, Xiaoqinling

CLC Number:

P618.51

ZHANG Yuan-hou，LI Zong-yan，ZHANG Xiao-min，QIAN Ming-ping，YANG Zhi-qiang，HE Yue，ZHANG Shuai-min，ZHANG Li-zhi，WANG Jian-ming. Overthrust Development and Its Relationship to Gold Mineralization in the Northern Belt of the Xiaoqinling Gold(Molybdenum) Province, Central China[J].J4, 2009, 39(2): 244-0254.

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Overthrust Development and Its Relationship to Gold Mineralization in the Northern Belt of the Xiaoqinling Gold(Molybdenum) Province, Central China