地质通报2024，Vol.43Issue(7)：1158-1172,15.DOI:10.12097/gbc.2022.12.024
秘鲁Morococha斑岩-矽卡岩-浅成低温热液型矿床成矿地质特征与区域找矿方向
Metallogenic geological characteristics and regional prospecting direction of the Morococha porphyry-skarn-epithermal deposit in Peru
摘要
Abstract
The Morococha area of central Peru,located in the Miocene metallogenic belt of Central Andean Peru,is one of the most representative porphyry-skarn and epithermal ore-forming systems in the world.In this paper,the characteristics and latest research progress of polymetallic mineralization of Cu,Mo,Pb,Zn and Ag in this area,such as porphyry type,skarn type and epithermal type,are systematically summarized.Combined with regional magma-hydrothermal mineralization process,the next prospecting direction in central Peru is proposed.The Morococha deposit,located in the northern section of the Yali Dome in central Peru,consists of a central Toromocho porphyry copper-molybdenum deposit and an peripheral polymetallic vein of lead,zinc,silver and gold.The main structure in the area is the NW Morococha anticline,and the stratigraphy is mainly composed of Permian-Triassic Mitu Group pyroclastic rocks,Jurassic Pucara Group carbonate rocks,Early Cretaceous Goyllarisquizga Group marine clastic rocks and carbonate rocks.The Miocene magmatic activities in the mining area are mainly the ore-free diorite(14.3～14.1 Ma)intrusive rocks in the Middle Miocene and the ore-forming granodiorite and feldspathic porphyry strains(9.4～7.7 Ma)in the Late Miocene.Morococha magma-hydrothermal system(8.5～7.2 Ma)is one of the reasons for the formation of super-large porphyry copper mineralization.Pb-Zn-Ag polymetallic mineralization mainly occurs about 0.5 Ma after porphyry mineralization and is controlled by regional structure.The deposit shows distinct metal zonation features spatially,with the central porphyry area hosting rich Cu ores,while more Zn,Pb,and Ag ores appear farther away from the porphyry zone.The Middle Miocene metallogenic belt in central Peru hosts numerous economically significant vein-type hydrothermal Pb-Zn-Ag polymetallic deposits.Recent comprehensive geological surveys and research results indicate that these polymetallic deposits are all part of the porphyry-skarn metallogenic system.Therefore,porphyry-skarn copper deposits and epithermal precious metal deposits are important exploration directions in central Peru.关键词
斑岩型铜钼矿床/铅锌银多金属矿床/成矿作用/秘鲁Key words
porphyry Cu-Mo deposits/Pb-Zn-Ag polymetallic deposits/mineralization process/Peru分类
天文与地球科学引用本文复制引用
郭维民,姚春彦,曾敏,杨宪涛,王天刚,刘君安..秘鲁Morococha斑岩-矽卡岩-浅成低温热液型矿床成矿地质特征与区域找矿方向[J].地质通报,2024,43(7):1158-1172,15.基金项目
科技部国家重点研发计划课题项目《环太平洋和非洲成矿域战略性矿产信息及成矿规律》(编号:2021YFC2901804)和中国地质调查局项目《华东地区江南陆块南缘等成矿区带重点调查区铜锂等战略性矿产调查评价》(编号:DD20230051) （编号:2021YFC2901804）
