“广东绿”玉石的成矿地质特征与矿床成因初步研究  

GEOLOGICAL CHARACTERISTICS AND PRELIMINARY GENETIC DISCUSSION OF "GUANGDON GREEN" JADE

作　　者：郭清宏[1,2] 周永章[1] 曹姝旻[2] 徐志[2] 张余[2] 

机构地区：[1]中山大学地球环境与地球资源研究中心,广州510275 [2]广东省物料实验检测中心,广州510080

出　　处：《地质找矿论丛》2008年第4期314-319,共6页Contributions to Geology and Mineral Resources Research

基　　金：国家自然科学基金(编号:40573019)资助

摘　　要："广东绿"玉石矿床发育于广东省广宁县五指山地区。玉石矿脉的空间分布受岩性控制,赋存于花岗闪长斑岩或花岗斑岩中;玉石原石色彩多样,岩石以显微鳞片变晶结构和块状构造为主;矿区围岩蚀变发育,具有绢云母化、高岭土化和黄铁矿化的蚀变分带现象。矿物学分析表明,"广东绿"是一种特殊的云母质玉石,主要由绢云母和水白云母组成,其全岩地球化学特征和云母的矿物化学组成相一致。成矿作用分析表明,晚期侵入的岩浆岩脉、剪切断裂带和中低温酸性流体活动构成了玉石矿形成的主要地质条件。研究认为"广东绿"玉石是一种特殊的绢云英岩化产物,即花岗质岩石遭受岩浆期后浅成中低温热水溶液蚀变和强烈的水化作用而成。The ＂Guangdong green＂ jade deposit is situated in Wuzhishan area, Ningxian county, Guangdong Province. It occurs in granodioritic porphyre and granitic porphyre and the spatial distribution of the jade veins are controlled by lithology. The raw jade is in multi-colors with scaly blastic and massive textures under microscope. Wallrock alteration is developed and characterized by zoning as sericitization, kaolinization and pyritization. Mineral study shows that the ＂Guangdong green＂ jade is a special micaceous jade mainly consisting of sericite and hydro-muscovite. The whole rock geochemical characteristic is coincided with the chemical composition of mica. The metallogenic analysis indicates that the jade formation condition includes late magmatic dykes, shearing faulting and acidic medium-low hydrothermal activity. The ＂Guangdong green＂ jade is a special sericite greisenized product and it is formed by granitic rock that was exposed to late magmatic epi-meso-hydrothermal alteration and strong hydration.

关 键 词：“广东绿” 玉石 绢云母 交代作用 广东省 

分 类 号：P589.2[天文地球—岩石学] P619.283[天文地球—地质学]