吉林省中生代火山—次火山热液金属矿床的区域成矿规律

吉林省中生代火山活动受北东向岩石圈深大断裂构造的控制。火山—次火山的热液成矿作用与它的物质成分和岩相有关,受火山构造的控制。区内多数矿床、矿点产于中生代火山岩盆地的边缘,构成以火山岩盆地为中心的矿化集中区。吉林省南部和北部地区一样,是寻找中生代陆相火山一次火山热液金、铜等矿产的有利地区。

REGIONAL METALLOGENIC RULE OF VOLCANIC-SUBVOLCANIC HYDROTHERMAL METAL ORE DEPOSITS, MESOZOIC, JILIN

The Mesozoic volcanic and related metallogenesis on the eastern margin of Asia were prompted by the underthrust of the Pacific plate relative to the Eurasian plate.The Mesozoic volcanic rock belt in Jilin province is a part of the circum Pacific volcanic belt. It was controlled by lithospheric fractures in NE direction. There were two stages of five cycles of volcanic eruption in Mesozoic in Jilin province. At the later stage of cyole of eruption there were cognate subvolcanic activities with relevant volcanic-subvolcanic hydrothcrmal matallogenesis. The metallogenesis was related to the composition and lithofacies of the volcanic rocks, and was controlled by the volcanic edifice.The majority of the ore deposists or mineralizations appear on the margins of the Mesozoic volcanic basins The structures of calderas and volcanic archs controlled the ore fields and ore deposits. None of the ore bodies were not produced in the open space of faults and fractures in volcanic edifice. Buth the nothern and the southern parts of Jilin province are prospective places gold,copper, lead, zinc and molybdenum.