影响碰撞造山成岩成矿模式的因素及其机制  

CONSTRAINTS AND THEIR MECHANISM ON THE PETROGENIC AND METALLOGENIC MODEL FOR COLLISION OROGENESIS

作　　者：陈衍景[1] 

机构地区：[1]北京大学地质学系

出　　处：《地学前缘》1998年第A08期109-118,共10页Earth Science Frontiers

基　　金：国家"九五"攀登预研95-预-39号项目;国家"九五"攻关;自然科学基金

摘　　要：基于分析陆内俯冲过程物质的活化迁移规律建立了碰撞造山成岩成矿模式，认为仰冲板片上依次出现热液矿床带、花岗岩基带和斑岩带。探讨了陆内俯冲的角度、速度、俯冲板片物质成分、地热梯度等因素对陆内俯冲成岩成矿模式空间分带模型的影响，推导了有关的变异形式，在充分显示碰撞造山成岩成矿模式之科学性和实用性的同时，为在碰撞造山带或陆内俯冲区进行实际找矿提供了理论参考。Based on analysis of activation and outward movement of materials of the intracontinental subducting slab, the petrogenic and metallogenic model was established for collision orogenesis. In the model, zones of hydrothermal deposits batholithic granites and porphyries develop at the overlapping slab as the distance increasing from the intracontinental subduction geosuture. This paper discusses its zonational variations and mechanisms with changes of angle, speed geothermal gradient and chemical composition of subducting slab, as well as imbrication of multiple intracontinental subduction regimes. The effectivity and rationality of the petrogenic and metallogenic model for collision orogenesis are clearly shown. It provides a theoretical guide for ore exploration in collision orogenic belts or intracontinental subducting areas.

关 键 词：碰撞造山作用 成岩 成矿模式 影响因素 

分 类 号：P581[天文地球—岩石学] P612[天文地球—地质学]