| 甘-新北山金窝子金矿田构造控矿解析 |
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| 关键词:ore-controlling structure system tectonic-dynamic conditions gold mineralization type Jinwozi gold ore-field Bei-shan area in Gansu and Xingjiang |
| 基金项目:原地质矿产部定向研究基金(地科定96-21) |
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| An Analysis of Ore-controlling Structures in the Jinwozi Gold Orefield, Beishan Area, Gansu and Xingjiang |
| The Jinwozi gold orefield, located tectonically in the Beishan middle zone on the southern edge of the collusion belt between Tarim-Sino-Korean plate and Kazakhstan plate, is of magmatic hydrothermal type controlled by fault structures. Regional structures control the distribution of gold metallogenic belts, and different structural units control different types of ore-controlling structures. The main structures in the orefield comprise the low angle thrust structural system, which includes NE-trending low angle NW-dip-ping thrust faults, associated NE-trending folds and high angle faults in the upper plate, and NW-trending high angle transverse tension faults in the hanging wall. Different structure elements control different gold mineralization types in the orefield. Low angle faults control the altered mylonite type represented by the No. 210 gold deposit, while NW-trending high angle transverse tension faults control the quartz-vein type represented by the Jinwozi gold deposit. However, no gold mineralization has been found in the NE-trending folds and the NE-trending high angle faults in the hanging wall. The low-angle fault not only serves as one of the most important ore-bearing structures but also plays an important role in controlling the geochemical interface of mineralization. Therefore, the two gold mineralization types in the orefield are different expressions of the same mineralization under different tectonic-dynamic conditions of the ore-controlling structure. |
| CHEN Bo-lin,WU Jin-guo,YE De-jin,LIU Xiao-chun.2003.An Analysis of Ore-controlling Structures in the Jinwozi Gold Orefield, Beishan Area, Gansu and Xingjiang[J].Acta Geoscientica Sinica,24(4):305-310. |
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