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- Title
METALLOGENIC SETTING AND MATERIAL SOURCE OF CAIHONG COPPER-LEAD-ZINC POLYMETALLIC DEPOSIT IN XINJIANG, CHINA: EVIDENCES FROM A RESEARCH ON LITHOGEOCHEMISTRY, CHRONOLOGY AND STABLE ISOTOPE.
- Authors
CHEN, C.; WU, C. M.; LÜ, X.; SU, Y. Y.; AISHAN, M.
- Abstract
Caihong copper-lead-zinc polymetallic deposit is located in the east of the orogenic belt of South Tianshan in Xinjiang, of which ore types mainly include lamellar, stripped and veined, net-veined Cu-Pb-Zn ore. Two types of ore forms and the differences among mineral assemblages showed that the deposit had gone through multi-stage mineralization. Research results showed that Caihong deposit was the volcanic exhalation sedimentation type deposit in the early mineralization stage, with the age of volcanic eruption of 426±4.2 Ma. Mineralization was formed in the oceanic crust subduction island-arc rift setting in the Middle-Late Silurian. The higher δ34S value in ore sulfide and unreached fractionation equilibrium indicated that the sulphur in this stage was derived from the continental marginal arc volcanic magma and the seawater sulfate in the late Early Paleozoic Era. The δD value and δ18O value in quartz, as well as the Eu positive anomaly of sulfide implied that the ore-forming fluids were derived from the mixing of the submarine hydrothermal solution and magmatic water. The deposit was the magmatic hydrothermal filling-metasomatic type deposit in the late mineralization stage, and the mineralization was closely related to the Zhongbao granite intrusion, formed in the collision-extension transformation stage of the plates in the Early Permian. The lower δ34S value of veined ore sulfide indicated that sulphur in this stage was mainly deep-seated magmatic sulphur in the Early Permian. The δD value and δ18O value in ore quartz, as well as the Eu negative anomaly of the sulfide implied that ore-forming fluid was derived from the mixing of the magmatic water of granite body in the late mineralization stage and the atmospheric precipitation.
- Subjects
COPPER-lead alloys; ZINC; OROGENIC belts; MINES &; mineral resources; MINERALIZATION
- Publication
Applied Ecology & Environmental Research, 2017, Vol 15, Issue 3, p651
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1503_651674