江西冷水坑银-铅-锌矿田地质特征及构造控岩控矿作用  

GEOLOGICAL CHARACTERISTICS AND ROLE OF STRUCTURAL CONTROL OF ROCKS AND ORES IN THE LENGSHUIKENG Ag-Pb-Zn ORE FIELD,JIANGXI

作　　者：刘迅[1] 申世亮[1] 

机构地区：[1]中国地质科学院地质力学研究所

出　　处：《地球学报》1991年第3期1-18,共18页Acta Geoscientica Sinica

基　　金：地质行业科学技术发展基金资助项目

摘　　要：冷水坑矿田银-铅-锌矿床属于与斑岩有关的高-中温岩浆期后热液矿床。在华夏系构造的基础上,新华夏系早期发展阶段形成的湖石-岭西断裂(F,断裂)是重要的导岩导矿构造,矿田内主要成矿母岩银路岭花岗斑岩体产出于F_1与F两断裂之间的构造破碎带中。 本矿田内矿床、矿体主要受断裂控制。矿田内主要成矿元素在成矿期断裂附近的迁移趋势是:成矿元素向断裂中心运移,向断裂两侧成矿元素含量逐渐降低。同时,对比成矿元素含量变化曲线与节理裂隙密度变化曲线,两者基本上是同步起伏的,说明矿化与节理裂隙的发育程度也密切相关。 矿田内银路岭矿床不同中段各穿脉中的矿脉产状统计结果表明,走向北东、倾向北西的矿脉在整个矿床中占绝对优势;与其相配套的同一走向、倾向南东的一组矿脉,发育也很好;两组矿脉在剖面上构成“X”型。The Ag-Pb-Zn deposits of Lengshuikeng ore field belong to the postma-gmatic high-and middle-temperature hydrothermal deposits relating to the porphyry. On the basis of the Cathaysiau system, the Hushi-Lingxi fault (called F, in the fieid) which formed in the early stage of the Neocathys-ian system is the important passageways controlling the magma and mineralization. The Yinluling granite-porphyry as the major minerogenic mother rock occurred in the structural fracture zone between faults F1 and F2. (Fig. 2)The ore deposits and ore bodies are mainly controlled by fractures in the ore field. The trend of migration of the main metallogenetic elements near faults of metallizing phase in the ore field was that ore-forming elements moved to the centre of the faults, and contents of elements decreased gradully away from the centre. Additionally, comparision variation chart of conents of the metallogenic elements with that of joint densities displays that they are synchronous, suggesting the mineralization is closely related with the development degree of the joints(Fig. 5,6).Statistics of the ore vein occurrences in the different levels in Yinluling deposit shows the NE-trending veins with NW-dip are dominant, and another set of SE-dipping conjugated veins are also developed. These two sets of veins make up the'X-type'structure in vertical section.

关 键 词：控矿作用 地质特征 锌矿 成矿元素 新华夏系 岩浆作用 矿床形成 矿化带 热液矿床 鹅湖岭组 

分 类 号：P5[天文地球—地质学]