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为了解缅甸第三纪断陷盆地中的次生油青种翡翠的形成机理,利用ICP-MS分析、电子探针微区分析对缅甸次生翡翠矿床的油青色带及原生区部位的元素和矿物分布特征进行对比研究,利用成因矿物学原理推测出断陷盆地未抬升前的埋藏深度在1.2km～2.4km;与原生翡翠相比,次生油青色带中的微量元素Fe,Mg,Co,Mn,Ni,Ca,Ag,Sr,Ce,Y,Ag明显增多、Na,Al,Mo的明显减少;研究表明,翡翠砾石的油青色带形成于原生翡翠砾石被深埋于断陷盆地之后,形成油青色带所需要的铁族元素主要来自于一同深埋入断陷盆地中的超基性碎屑物质提供;断陷盆地中形成的流体经历了酸性阶段和晚期的碱性阶段,在从早期的酸性流体对深埋于其中的原生翡翠砾石进行溶蚀,并携带铁、镁等元素进入翡翠的颗粒间隙和裂隙中,后期,即深埋期流体性质变为碱性流体阶段,此阶段翡翠颗粒间隙中的Fe,Mg等元素发生沉淀形成绿泥石,从而形成了次生的油青种翡翠。
In order to understand the formation mechanism of jadeite from the secondary oil genus Jade in the Tertiary rift basin in Myanmar, ICP-MS analysis and electron probe microanalysis were used to analyze the oil cyan zone and the elements in the primary zone of Burma secondary jadeite deposit Mineral distribution characteristics of comparative study, the use of genetic mineralogy theory deduced that the depth of burial depth of the fault basin before being uplifted in the range of 1.2km ~ 2.4km; compared with the native emerald, the secondary oil cyan belt trace elements Fe, Mg, Co The contents of Mn, Ni, Ca, Ag, Sr, Ce, Y and Ag increased obviously and the contents of Na, Al and Mo decreased obviously. The research shows that the oil-green belt of emerald gravel was formed after the native emerald gravel was deeply buried in the rift basin The iron group elements required to form the oil-blue bands are mainly derived from the ultrabasic detrital material buried deep into the rift basin. The fluids formed in the rift basin experienced the acid phase and the late alkaline phase. From the early acid fluid, the deep buried in the original emerald gravel erosion, and carrying iron, magnesium and other elements into the jadeite particle gap and fracture, the latter, that the nature of the deep-buried fluid becomes alkaline fluid phase, this stage Jade particles in the gap Fe, Mg and other elements occur Sedimentation formed chlorite, which formed a secondary oil jade species.