甘肃北山新探获一处中型金矿床—703东金矿（5.2 t）

详细信息

A new medium-sized gold deposit discovered in Beishan, Gansu Province—703 East Gold Mine (5.2 t)

Zhangye Geo-mine Survey Instisute of Non-frerous Metal Geological Exploration of Gansu Province, Zhangye 734012, Gansu, China

图 1 研究区大地构造位置示意图（a）和703东矿区地质简图（b）

1—第四系冲洪积沙土；2—第四系冲洪积碎石；3—石炭纪扫子山组第4段；4—石炭纪扫子山组第3段；5—石炭纪—二叠纪英云闪长岩；6—石炭纪—二叠纪石英闪长岩；7—二叠纪钾长花岗岩；8—石炭纪—二叠纪角闪辉长岩；9—英云闪长质糜棱岩；10—石英闪长质糜棱岩；11—花岗细晶岩脉；12—花岗斑岩脉；13—闪长玢岩脉；14—辉长辉绿岩脉；15—石英脉；16—金矿体；17—含金石英脉（Au含量小于0.8 g/t）；18—断裂及编号；19—勘查区范围

Figure 1. Geotectonic location map of the study area (a) and geological map of 703 east mining area (b)

1–Quaternary alluvial–proluvial sandy soil; 2–Quaternary alluvial–diluvial gravel; 3–The 4th member of Carboniferous Saozishan Formation; 4–The 4th member of Carboniferous Saozishan Formation; 5–Carboniferous–Permian tonalite; 6–Carboniferous–Permian quartz diorite; 7–Permian K–feldspar granite; 8–Carboniferous–Permian hornblende gabbro; 9–Tonalite diorite mylonite; 10–Quartz diorite mylonite; 11–Granulite dike;12–Granite−porphyry vein; 13–Dioritic porphyrite vein; 14––Gabbro−diabase vein; 15–Quartz vein; 16–Gold ore body; 17–Au−bearing quartz vein (Au<0.8 g/t); 18–Fracture and number; 19–Scope of the exploration area

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