Geology, Alteration and Metallogenesis of Giant Tongkuangyu Porphyry Copper Deposit in Zhongtiaoshan Area
详细信息
- 责任者：Cui Chunxiang (No.3 Bureau ; Metallurgical Geology Bureau ; Taiyuan 030002 ; China) ; Zhen Yunqing
- 刊名：Contributions to Geology and Mineral Resources Research
- 出版年：2013
- 卷期：28(1)
- 页码：p.1-11
- issnNo：ISSN1001-1412
- isbnNo：CN12-1131/P
摘要
The giant Tongkuangyu porphyry copper deposit in Zhongtiaoshan area,shanxi province is located in the southern part of North China plate and/or the northern side of Qinling orogen where is a convergent active continent margin from compressional to extensional environment.The main stratum in the mining area is Tongkuangyu Subgroup of green schist of low amphibolite metamorphoded from volcanic and subvolcanic rocks.Spatially,the deposit is closely related to Proterozoic calc-alkaline S-type granite and is strictly controlled by volcanic apparatus.Re-Os age dating of molybdenite is(2 108±32)Ma and is the oldest porphyry copper deposit in China.Copper ore body occurs in thick tabular lens with veinlet-disseminated ore dominated and injected massive ore.The average grade is 0.68% Cu.Rich ore is about 30%.Ag and Mo are the by-products.Ore fluid is mainly derived from mantle and incorporated with crustal materials and meteoric water.Alkaline replacement and quartz + sericitization and the overprinting albitization occur at high level emplacement because of volcanic exhalation and secondary boiling.No planar ring structure is observed.The copper deposit is inferred a meta-volcanic hydrothermal porphyry copper deposit.Magma chamber is predicted and it is potential for further prospecting to depth of the deposit.
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