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- Title
新疆东天山三岔口铜矿床同位素组成及 成矿物质来源示踪.
- Authors
艾珂丹·阿里根江; 李顺达; 王可勇
- Abstract
Sanchakou copper deposit is located in the Dananhu Island arc belt of East Tianshan Mountain, Xinjiang. It is a medium-sized deposit newly discovered in recent years. According to the outcrop of Sanchaokou copper mine in East Tianshan, Xinjiang, there are lower Carboniferous Gandong Formation, Middle Carboniferous Wutongwzi Formation and Miocene Taoshu Formation from old to new. The deposit type is porphyry. The ore bodies are mainly vein-like and disseminated, and the mineralization is developed in the enantiogenic granodiorite porphyrite and quartz diorite porphyrite controlled by the NE-trending brittle ductile shear zone. The main ore minerals are chalcopyrite, followed by pyrite, molybdenite and chalcopyrite. Copper mineralization occurs mainly in quartz-brass-pyrite veins. The S and Pb isotopic compositions of chalcopyrite and pyrite in sulfide of Sanchakou copper deposit were analyzed. The δ 34 S of S isotopic chalcopyrite varied from 0. 1‰ to 0. 2‰. The δ34S of pyrite ranges from 0. 4‰ to 0. 5‰. The isotopic composition of pyrite shows the characteristics of mantle derived sulfur. The 206 Pb / 204 Pb value of Pb isotope chalcopyrite is 18. 234 ~ 18. 266, 207 Pb / 204 Pb value is 15. 603 ~ 15. 619, 208 Pb / 204 Pb value is 37. 813 ~ 37. 872. The 206 Pb / 204 Pb value of pyrite is 18. 177 ~ 18. 193, the 207 Pb / 204 Pb value is 15. 591 ~ 15. 599, and the 208 Pb / 204 Pb value is 37. 756 ~ 37. 778. According to the diagram of Pb isotope tectonic environment evolution and the comprehensive analysis of parameters, it is shown that Pb comes from the mixture of crust-mantle material. Based on the study of geological characteristics and metallogenic material sources of Sanchaokou copper deposit, it is considered that Sanchaokou copper deposit belongs to porphyry deposit
- Publication
Science Technology & Engineering, 2023, Vol 23, Issue 33, p14095
- ISSN
1671-1815
- Publication type
Article