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对东秦岭—大别山5个特大型钼矿床成矿母岩地质特征研究认为:①钼矿床成矿母岩为钾长花岗斑岩,岩石中钾长石、石英斑晶均为高温矿物,斜长石以更长石为主;②钼矿床受成矿母岩严格控制,而成矿母岩体则受花岗岩基的控制,三者在空间上关系密切,成矿母岩限制在花岗岩基外接触带10 km范围内;③岩体为复式小岩体,出露面积均小于0.12 km2;④成矿母岩均为强酸性岩石,全部为高酸、高钾、高碱及低镁铝的钙碱性系列的超浅成侵入岩,岩体侵位深度<3 km;⑤成矿母岩微量元素中主成矿元素Mo>10×10-6时易成矿,Mo>50×10-6时易形成大-特大型钼矿床;⑥岩体成岩时代90~165 Ma。
The study on the geologic characteristics of the ore-forming parent rocks of five extra large molybdenum deposits in the East Qinling-Dabie Mountains shows that: ① the molybdenite-hosted parent rocks are potash-bearing granite porphyries. Both K-feldspar and quartz porphyrite in the rocks are high-temperature minerals, The feldspar is dominated by longer feldspar. The molybdenum deposit is strictly controlled by the metallogenic host rock while the metallogenic parent rock is controlled by the granite base. The three are closely related in space and the metallogenic parent rock is limited to the granite base The contact zone is within 10 km; ③ the rock mass is a small compound rock with exposed area of less than 0.12 km 2; ④ the metallogenic rocks are strongly acidic rocks, all of which are high acid, high potassium, high alkali and low magnesium aluminum Ca-alkaline series of ultra-shallow into intrusive rocks, emplacement depth of rock intrusion <3 km; ⑤ ore-forming parent rock trace elements in the main ore-forming element Mo> 10 × 10-6 easy to mineralization, Mo> 50 × 10- It is easy to form large-large molybdenum deposit at 6 o’clock, and the rock diagenetic age is 90-165 Ma.