缅甸翡翠阶地矿床的表生还原性水岩反应特征及其成因初探  

Study on Secondary Reducing Fluid-Rock Interaction in Jadeite Jade Bench Deposit in Burma

作　　者：胡楚雁[1] 陈钟惠[1] 

机构地区：[1]中国地质大学

出　　处：《宝石和宝石学杂志》2002年第1期1-5,49,共5页Journal of Gems & Gemmology

摘　　要：缅甸翡翠阶地矿床的表生还原性水岩反应主要发生于具黑乌沙皮壳的翡翠砾石层中 ,导致翡翠沿微裂隙产生绿泥石化和部分裂隙的愈合 ,出现灰绿色、暗绿色或蓝绿色 ,提高透明度 ,并显示出油青种或蓝水种翡翠的特征。表生还原性水岩反应是缅甸翡翠阶地矿床地球化学分带性的体现 ,其成因与当地的地理气候条件、表生风化作用和地下水的长期作用、翡翠中存在的微裂隙及其中微细矿物在表生水溶液的作用下的溶解和蚀变反应等因素密切相关。The secondary reducing fluid-rock interaction in the jadeite jade bench deposit in Burma is formed in the strata of jadeite jade gravels with Heiwusha shuck. In the process of the interaction, chlorite alteration is formed along the fractures of jadeite, some of which have been healed. So the colour of jadeite jade is changed to sage green, dim green or greenish blue, and the transparence is enhanced. Genesis of the interaction is related to the geochemical properties of the bench deposits, geographical conditions, long time weathering and groundwater action, fractures in jadeite jade, etc.

关 键 词：表生还原性水岩反应 成因 翡翠阶地矿床 缅甸 表生风化作用 地下水 蚀变作用 

分 类 号：P619.283[天文地球—矿床学]