摘要
庐山变质核杂岩体的抬升与大别隆起的南移是九瑞地区中生代的两次构造事件。九瑞地区中生代构造是这两次构造事件所形成的构造复合作用的结果。依据其复合情况将该区划分出３种控岩控矿断裂构造类型，并阐述构造性质与岩浆侵位和成矿类型三者之间的关系。
Two tectonic events have taken place in Jiurui area since Mesozoic:one was the elevation of Lushan metamorphic core complex body in the south, which resulted in the formation of extensional structure in its neighboring areas;the other was the sliding and napping of Dabie uplift onto Yangtze massif in the north under the influence of the left lateral translation of Tanlu fault, which formed southward compressional structure. Compounding occurred between the NEE trending decollement stripping faults formed by the former event and a set of NE and NW trending compresso shear faults formed by the latter event, in which the NE trending faults frequently yielded to the NEE trending ones, while NW striking faults commonly assumed discontinued tracing distribution due to the interference of the NEE striking ones. In consequence, a network fault system composed of NEE and NW trending faults was formed in this area. According to the compounding conditions of the faults, three types of rock controlling and ore controlling faults can be recognized in this system:(1) simple faults, viz. NEE , NE and NW trending faults not subjected to compounding, which are mainly related to lenticular and veinlike injected intrusives that chiefly contain small sized S and Cu mineralizations;(2) intersection faults, with the intersections between the NEE trending decollement stripping faults and the NW trending compresso shear faults having the greatest significance. The relevant intrusive bodies are mostly inverted drop shaped stoping emplaced rock bodies associated primarily with fairly large sized skarn, porphyry and hydrothermal Cu, S, Mo and Au mineralizations; (3) compound faults formed by the compounding between NEE and NE striking faults, which are mainly related to stratoid injected rock bodies associated mostly with medium and small sized veinlike Pb, Zn, Ag, Cu and Au mineralizations.
出处
《矿床地质》
CAS
CSCD
北大核心
1999年第2期129-137,共9页
Mineral Deposits
基金
国家攻关项目
关键词
变质核杂岩体
大别隆起
伸展构造
矿床成矿
成岩
complex body of metamorphic core, Dabie uplift, extensional structure, Jiurui in Jiangxi
