翡翠矿床的地质特征及经济价值  

GEOLOGICAL CHARACTERISTICS AND ECONOMIC VALUES OF JADETITE DEPOSITS

作　　者：沙淑清[1] 黄磊[1] 毛建林[1] 张境花[1] 

机构地区：[1]中国地质大学地质过程与成矿作用国家重点实验室,北京100083

出　　处：《资源与产业》2009年第4期88-91,共4页Resources & Industries

基　　金：地质过程与成矿作用国家重点实验室基金项目(GPMR0537)

摘　　要：翡翠是以硬玉为主的集合体,翡翠原生矿床是伴随着印度板块与欧亚板块碰撞过程中形成的。是超基性岩沿俯冲带断裂呈岩墙贯入,并在压扭性应力作用下经较低级变质作用形成的。本文研究得出矿床呈脉状产在蛇纹石化橄榄岩脉体中,硬玉的形成与超基性岩并无成因关系,仅是位置上的共生。矿床成矿后的保存决定了矿床的价值,超基性岩体顶部及上部的硬玉矿体质量好,其剥蚀冲积沉积中的矿体也好;岩体中下部所产硬玉质量下降,说明达宝石级的硬玉已剥蚀完。最后分析了当前金融危机形势下翡翠的保值性。Jadeitite is a kind of jadeite aggregates. The primary jadeitite deposits were formed during the collision between Indian plate and Eursian plate. The ultrabasic rocks intruded as dikes along faults, and underwent low-grade metamorphism under a compresso-shear stress. The deposits occur as veins in the serpentinized peridotite. The formation of jadeite has no genesis with ultrabasic rocks, only coexisting in location. The post-mineralization preservation plays a vital role in the values. Good quality jadeitites are always located at the upper to top of uhrabasic rocks, and also are found in alluvium by erosion. This paper discusses the depreciation-proof nature of jadeitite under the global financial crisis.

关 键 词：翡翠 硬玉 成矿系统 保值 

分 类 号：F426.1[经济管理—产业经济] P619.283[天文地球—矿床学]