缅甸翡翠原生矿床成因机制新探

The new genesis model of jadeite in Burma

缅甸翡翠质量好,产量大,众多国内外学者基于不同的资料和对资料的不同理解,曾对其原生矿床成因提出过不同的假说。现通过对已知翡翠原生矿成因模式中存在问题的分析,结合野外资料、大洋钻探成果以及对翡翠微观结构观测的结果,认为地质时期缅北地区板块缝合部位的混杂堆积是硬玉成岩的物源,并经历了俯冲熔融—折返冷却结晶的成岩过程;同时提出后期构造运动的改造是影响成玉质量的主要因素。

Burma jadeite is well known of its excellent quality and mass production. Lots of the researchers have worked out different models to explain the genesis of it. Through the analysis of the problems exist in those models, considering the new findings come up due to the carry out of the ODP program and the using of the microscope, we discussed the material resources and PT conditions of the formation of jadeite. Also we think that the tectonic movement has great influence on the quality of the jadeite.