摘要
福建省金矿与地层、构造、岩浆岩等成矿地质条件关系密切，金矿赋矿层位有8个，其中以前寒武纪麻源群、龙北溪组和中生代火山岩、火山碎屑岩层位为最主要。金矿主要分布在区域性断裂、火山构造、北东向与北西向两组断裂复合部位及火山基底隆起部位，韧性剪切带、推覆（剥离）构造发育地段，是金矿重要成矿部位。金矿成矿时代主要有前寒武纪和燕山期两个成矿期，两者在成矿时间上显示继承性，在空间上具有相关性。金矿化在前寒武纪与中基性、中酸性变质火山岩有关，而燕山期与中酸性火山岩、次火山岩关系最为密切。根据金矿成矿作用、矿质来源、成矿地质构造环境，将福建省金矿成因划分为7种。其中韧性剪切带和火山-次火山热液型最主要，其次为断裂构造蚀变岩型和火山沉积-热液叠加型。
The gold ores in Fujian Province are closely related with the metallogenic geologicalconditions such as strata, structures, magmatic rocks etc. There are 8 host horizons of goldores in Fujian Province, among them the main horizons are Mayuan Group and LongbeixiFormation (Precambrian) and Mesozoic volcanic rocks and pyroclastic rocks. The gold oresare mainly distributed in the regional freatures, volcanic structures, compound position of NEand NW trend fractures, and volcanic basement upwelling areas. The areas devoloping ductileshear belts and nappe (removal) structures are the important ore-forming positions. The mainmetallogenic epoch of the gold ores is Precambrian or Yanshanian epoch, which is inheritantin the mineralization time and correlated with the ore-forming location. In Precambrian, thegold mineralization was related to intermediate-basic and intermediate-acid metavolcanite,butin Yanshanian epoch was related to intermediate-acid volcanic and subvolcanic rocks.According to the gold metallogenic geological tectonic setting, there are 7 types of gold oregenesis in Fujian Province, in which the ductile shear belts and volcanic-subvolcanichydrothermal types are the most important types, and the faulted structure altered rock typeand volcanic sedimentary-hydrothermal superimposed type are also important.
出处
《福建地质》
1998年第1期24-34,共11页
Geology of Fujian
基金
福建省自然科学基金!D90008
关键词
金矿床
矿床成矿
地质条件
成矿远景
gold ores, type of ore deposit, ore-forming regularity, regional metallogenicmodel, Fujian Province
