华南云开地区金银铜铅锌矿成矿地质标志  

GEOLOGICAL INDICTORS OF GOLD, SILVER, COPPER, LEAD AND ZINC MINERALIZATION IN YUNKAI DISTRICT, SOUTH CHINA

作　　者：梁约翰[1] 张启富[1] 杨世义[1] 李林[1] 

机构地区：[1]宜昌地质矿产研究所,宜昌443003

出　　处：《华南地质与矿产》1998年第4期14-21,共8页Geology and Mineral Resources of South China

基　　金：地质矿产部"八五"科技攻关项目"武夷-云开典型成矿区矿产预测"下属二级课题"云开隆起区成矿地质环境和成矿预测研究"(85-01-007-03)

摘　　要：对区内5个成矿带进行研究,提出云开隆起脆性剪切带阵列控制着金矿化分布的态势;印支期重熔花岗岩和燕山晚期花岗岩迭加的脆性或脆韧性剪切带是金矿床集中部位;金矿成矿斑岩体的定性判别标志,新发现加里东晚期斑岩型矿床;岩浆热液矿床沿构造岩浆岩带、隆起与坳陷交接部位、坳陷里的构造凸起边缘或隆起里的凹陷周缘和NNE-NE与NW—NWW走向的壳层逆掩断裂交织的菱形块上升部位或各自的相对上升盘分布,岩浆侵入体出现在构造复合部位,特别是NE向深断裂和EW向、NW向构造复合部位;含矿层位为前寒武纪—二叠纪地层;查明燕山运动期间三次铜、铅、锌（银）区域成岩成矿岩浆活动。Through geological and geochemical study of the five mineralization belts, we conclude that: (1)the altered fractured rocks type gold mineralization is controlled by the brittle shear belts in the Yunkai Uplift, especially in the northern and western margin of the uplift; (2)gold deposits are concentrated in the brittle or brittle-ductile shear belts superimposed by Indosian or late Yan-shanian granitic magmatism; (3) the magmatic hydrothermal deposits are distributed along the tectonomagmatic belts, transition areas of uplifts with depressions, margins of the protruding massifs within the depressions and of sunken massifs within uplifts, the margins of ascending rhombic blocks produced by interlacing NNE-NE and NW-NWW-striking crustal overthrust faults or the upthrown sides of these faults; (4)magma usually intruded along the structurally interlacing sites, especially in composite parts of the NE-striking deep faults with EW-and NW-striking structures; (5) the ore-bearing stratigraphic horizons include Precambrian strata, Cambrian and Ordovician flysch or flyschoid formation, and Devonian to Permian flyschoid formation.Besides, the authors, based on comparison study of mineralized and non-mineralized porphyries, put forward qualitative petrological, lithochemical, mineralogical, geochemical and structural criteria for identifying gold-mineralized porphyries; discovered a gold deposit related to the late Caledonian porphyry body; and recognized three stages of magmatic activities and associated metallogenic events: the Jurassic intermediate-acidic intrusions (adamellite and granodiorite) rich in iron and poor in magnesium, related to iron (tungsten, molybdenum, tin), copper, lead-zinc (silver) mineralization; the Early Cretaceous intermediate-acidic intrusions (granodiorite)rich in magnesium, calcium, potassium and poor in sodium, associated with copper, molybdenum, iron(bismuth, tungsten), lead-zinc (silver) mineralization; the Late Cretaceous acidic and ultra-acidic granitic intrusions rich in alkaline metals,

关 键 词：金银铜铅锌矿床 成矿地质标志 云开地区 成矿带 金矿化作用 成矿规律 

分 类 号：P618.510.2[天文地球—矿床学] P618.402[天文地球—地质学]