摘要
锑是湖南省的优势矿种之一,研究锑矿地质特征及成因类型,对推动湖南省境内锑矿的找矿勘查具有一定社会现实意义和经济意义。控矿因素研究表明:其控矿地层有泥盆系、前寒武系、侏罗系-白垩系;稳定基底与活动坳陷带的边缘,在稳定基底的范围内,二者在其地质发展史中有着剧烈的相对活动的地区,是矿床赋存的有利构造区;矿床的分布受区域性大断裂和褶皱控制,多数矿床定位于区域性大断裂旁侧次级断裂与背斜交汇处;与汞、锑矿有关的岩体主要是印支期-燕山期花岗岩;酸性-中酸性斑岩(体)包括花岗闪长斑岩、花岗斑岩、石英斑岩等岩类,分布广泛,这些斑岩多与成矿关系密切。综合研究表明锑矿床在时间上主要形成于印支期-燕山期,在空间上集中分布在江南隆起的雪峰山弧形构造带,其次分布在湘中-湘南成锑带;地层、构造、岩浆岩等共同决定锑矿床的定位,最主要的成因类型为构造热液脉状矿床,重要的成因类型为层控热液整合型矿床、沉积改造层控型矿床。
Antimony is one of the dominant minerals in Hunan Province. It is of social and economic signifi- cance to study antimony ore geology and its genesis in promoting the antimony prospecting and exploration in the province. The study of the ore controlling factors shows that the ore controlling strata are found in Devonian, Precambrian, Jurassic and Cretaceous basement; and in the stable basement and active depres- sion margins, where relatively violent activities occurred during the geological evolution, thus the favorite structure for the ore deposit. The distribution of ore deposits is controlled by the large reginal faults and folds and so most of the ore deposits are formed aside the regional faults or in the interchange of secondary faults and anticline. The rock bodies related to mercury and antimony are mainly Indosinian-Yanshanian granite and acid porphyry veins （bodies） including granodioritic porphyry, granite porphyry and quartz porphyry,which are widely distributed and closely related to ore genesis. We suggest, after a comprehen- sive study, that antimony deposits were mainly formed in Indosinian-Yanshanian temperally and are spa- tially concentrated in Xuefengshan arc tectonic zone of Jiangnan uplift, and secondly distributed in antimo- ny forming belt in middle Hunan and south Hunan; and that the location of antimony deposits is deter- mined jointly by the strata, structures and magmatic rocks. The tectonic hydrothermal vein deposit is the main genetic type , while the important genetic types are stratabound hydrothermal integrated deposit and sedimentary reformed stratabound deposit.
出处
《地质科技情报》
CSCD
北大核心
2017年第3期197-204,共8页
Geological Science and Technology Information
基金
中国地质调查项目"中国矿产地质与成矿规律综合集成和服务(中国矿产地质志)"(DD20160346)
关键词
锑矿
地质学
控矿因素
成因类型
antimony deposit
geology
ore controlling factors
genetic type
