| 高海欧,冯跃文.智利中北部IOCG矿床成矿模式及找矿标志[J].矿产勘查,2018,9(4):622-629 |
| 智利中北部IOCG矿床成矿模式及找矿标志 |
| Metallogenic model and prospecting criteria of IOCG deposit in central and northern Chile |
| 投稿时间：2018-04-23 |
| DOI： |
| 中文关键词: 智利中北部 IOCG矿床 成矿模式 找矿标志 |
| 英文关键词: central and northern Chile, IOCG deposit, metallogenic model and evolution,prospecting criteria |
| 基金项目: |
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| 中文摘要: |
| 智利中北部铁氧化物铜金矿床(IOCG矿床)形成于中生代安第斯型主动大陆边缘背景下的岩浆弧及弧(前)后盆地。通过对智利海岸山带IOCG矿床的成矿线索进行梳理,文章认为IOCG矿床的主要成矿物质来源为岩浆,主要控矿构造为阿塔卡玛断裂,主要岩浆活动为中生代地幔热柱活动和俯冲相关岩浆。根据IOCG矿床的时空分布规律,文章提出了中—晚侏罗世火山喷发型铁—磷矿床,早白垩世火山沉积—改造型铜银矿床和晚白垩世东部火山喷发—热液叠加型铜金银多金属矿床等3种成矿模式及其成矿演化过程,并据此总结了地质、蚀变、地球化学和地球物理等4种找矿标志。 |
| 英文摘要: |
| The middle-north iron oxide copper-gold deposit (IOCG deposit) in Chile was formed in the magmatic arc and back-arc (fore-arc) basin in the context of the Mesozoic Andean active continental margin. By combing the metallogenic trails of the IOCG deposits along the coast of Chile, this paper indicated that main source of ore-forming material in the IOCG deposits was magma, and main ore-controlling structure was the Atacama fault, and main magmatic activity was the Mesozoic mantle plume activity and subduction related magma. According to the spatial-temporal distribution of IOCG deposits, this paper proposed mid-late Jurassic volcanic spray iron-phosphorus deposits, early Cretaceous volcanic sedimentary-reconstructed copper-silver deposits, and late Cretaceous volcanic eruptions-hydrothermal superposition deposits. Three metallogenic models and their metallogenic evolution processes, such as copper-gold-silver polymetallic ore deposits, have been summarized, and four kinds of prospecting signs such as geology, alteration, geochemistry and geophysics have been summarized. |
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