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2016, 35(2) 336-347 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Chronology and geochemistry for granodiorite porphyry from Yingmencha Cu- - Mo deposit in Linjiang of Jilin |
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WANG Hao, LI Bi-Le, PENG Bo, WANG Shuo, JIN Huang-Yu, NIE Li-Jun |
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1. College of Earth Sciences��Jilin University��Changchun 130061��China; 2. Jilin Bureau of Geology and Mineral ��esources��Changchun 130061��China; 3. The School of Earth Sciences and ��esources��Chang’an University��Xi’an 710054��China; 4. Institute of Geological Survey of Jilin Province��Changchun 130061��China; 5. ��egional Survey and Mineral ��esources of Jilin Province��Changchun 130022��China |
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Abstract��
The diagenetic age of granodiorite porphyry in Yingmencha of Jilin Linjiang is (168 ±1) Ma (Mid- dle Jurassic) based on LA-ICP-MS zircon U-Pb dating��a product of Yanshan magmatic activity�� The geochemical study shows that the rocks are characterized by aluminum- weakly peraluminous��high in potassium calc- alkaline se- ries��enriched in Sr�� Ba and K�� depleted in Nb�� Ti, Ta and P�� and not significant in δEu anomaly�� which indicate the rocks belong to the I- type granite��and the magma was derived from the partial melting of crust�� Combined with the regional tectonic evolution background of igneous rocks��it is considered that the Yingmencha granodiorite por- phyry and copper (molybdenum) deposit formed in the environment of volcanic arc under the subduction of the Pa- leo- Pacific plate to the Eurasian plate�� |
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Keywords��
Granodiorite porphyry
Zircon U-Pb chronology
Geochemistry
Yingmencha
Linjiang of Jilin
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