中文摘要:我国东部斑岩型矿床主要分布在几条板内断裂岩浆带内。成矿岩浆系由不同比例的幔源物质和壳源物质重熔而成。形成Fe、Cu和Mo矿床的岩浆以幔源物质为主，形成铀，锡和钨矿床的岩浆则以壳源物质为主。与各种矿床有关的岩浆岩的D1和S1有一定的变化范围。热液是由岩浆水和雨水混合而成。成矿溶液的盐度，一般较高(可达40—69 wt%NaCl当量)，但钨矿和金矿有时甚低(2—3 wt.％NaCl当量)。成矿流体的成分主要为H2O、Na、K、Ca、C1、F、SO42-和CO2。矿石是在近中性的弱还原环境中形成的。整个成矿过程的温度变化范围很大，但矿石的形成温度很窄，变化在150～400℃之间。由于成矿系统时而开放时而封闭，成矿压力变化很大，并引起多次矿液沸腾、围岩蚀变和金属矿物的沉淀。
Abstract:The porphyry deposits are mainly located in several intraplate fracture-magma belt. The ore-forming magma was formed as a result of remelting of mantle materials and crustai material in different proportions. Cu, Mo, Fe deposits were formed from magTna of mantle origin, while W, Sn, U deposits mahdy from magma of crustal origin. D1 and S1 of ore-related maffma in different kinds of deposits vary in a limited range. The hydrothermal fluid is amixture of magmatiC water and meteoric water. Salinity of fluids is generally high and can even reach 40一69 wt％NaCl equiv．in Cu and Sn deposits; nevertheless, in Au and W deposits, it is sometimes extremely low, and even as low as 2—3 wt％NaCI equiv．Hydrothermal fluid consists mainly of H2O, Na, K, Ca, Ci, F, SO42-and CO2. Fluid inclusion studes show that ore was formed in a weak reduction environment, and that although the temperature of the whole metallogenic process varied greatly, the ores were formed in a narrow temperature range: varying between 150℃and 400℃. The pulsating open and closed ore-forming system resulted in considerable drop of pressure, repeated boiling of ore fluid, wall rock alteration and precipitation of metallic minerals.
文章编号：
中图分类号：
文献标志码：
引用文本：
李秉伦，谢奕汉，李若梅，王英兰.1989.我国东部中生代斑岩型矿床的基本特征[J].矿床地质,8(3):3~13.1989.Basic characteristics of mesozoic porphyry-type deposjts in eastern China[J].Mineral Deposits8(3):3~13
图/表
