华北板块南缘区域成矿模式及金矿地质基本特征

华北板块南缘自中元古代始，表现为沟弧盆体制的Ｂ型俯冲带，至中生代演化为大陆板块间碰撞挤压的Ａ型俯冲带。这一大地构造格局及其演化决定着板缘成矿区带划分，并控制着区内不同矿产种类、不同矿床类型的成生规律和时空构型。板块南缘内生矿产丰富，矿床类型甚多，分布有序。它们是以燕山期构造－热事件为成矿动因的具有成生联系的有色金属－贵金属矿产成矿系列。板缘金矿类型甚多，主要有石英脉型、构造蚀变岩型、斑岩－接触交代型。各类矿床都具有成矿物质多来源、成矿溶液多来源和成矿作用多期次多阶段的特点。金的沉淀富集作用取决于有利的构造部位和成矿溶液性质的改变，而引起这一改变的原因是不同性质溶液的混合作用和热液运移过程中温压条件，及所遇围岩性质发生了根本转变。金的载体矿物主要为石英和黄铁矿，但随着不同矿化阶段和矿化环境常形成多样的矿石类型。

REGIONAL METALLOGENIC MODEL ON THE SOUTH EDGE OF NORTH CHINA PLATE AND BASIC GEOLOGICAL CHARACTERISTICS OF GOLD DEPOSIT

The south edge of North China Plate shown B type zone of subduction with groove-arc-basin mechenism since Middle Proterozoic Era began,it evoluted as A type zone of subduc-tion with collision compressional between continental plate in Mesozoic Era. This geotectonicframework and its evolution resolved the devision of plate metallogenic zone,controled themetallogentic pattern and space-time type of different mineral sorts and genesis types. Thereare enriched endogenetic deposits on the edge of plate and many sorts of deposits,they dis-tributed in succession. They belong to mineral sequence with nonferrous metal and preciousmetal having relation to structral-heat event in Yanshan period.There are many sorts of golddeposits on the edge of plate,quartz vein,structral wall-rock altered,porphyry contact meta-somatic. Each type of deposit has characteristic of multiple source of metallogenic matter,hy-drothermal ore--forming solution,and multi-stage of mineralization,The gold sedimentary en-richment depended on good structral setting and characteristic changing of ore-forming solu-tion produced by mixing of different solution moving and turnment of wall-rock it met.Thegold-bearing mineral mainly consist of quartz and pyrite,but many sorts of ore formed in dif-ferent mineral periods and environment.