• 责任者：Li Jianxu (State Key Laboratory of Geological Processes and Mineral Resources ; School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Fang Weixuan
• 刊名：Geoscience
• 出版年：2011
• 卷期：25(5)
• 关键词：火成岩 ; igneous rocks ; 智利 ; Chile
• 页码：p.877-888
• 图表：6 illus., 1 table, 25 refs.
• 分类号：0801
• 出版序号：188
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

The Copiapó GV area of northern-central Chile is situated in the transition zone between a Mesozoic iron oxide copper-gold (IOCG) deposit and a porphyry copper deposit. The intrusive rocks mainly consist of calc-alkaline, medium to coarse grained gabbro diorite, diorite, diorite porphyry, biotite granite, porphyritic granite and monzonite. The assemblage of the intrusive rocks is interpreted to be formed at the subduction zone of oceanic crust during conversion from partially expansion to extrusion. As a consequence, the Mesozoic back-arc basin closed up and uplifted rapidly. The magma intruded mainly in the period of Late Cretaceous-Paleocene. The magmatic activities of different periods created a number of hydrothermal centers and developed horizontal alteration zones and vein-type alteration-mineralization zones. These phenomena may present the potential of occurrence of IOCG mineralization or porphyry copper-gold mineralization in deep area.