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利用原子力显微镜 (AFM)对缅甸硬玉进行表面观察 ,研究其纳米级范围内矿物晶体的超显微结构及构造特征 ,探讨其形成的动态过程和物理化学等外部条件。结果发现在缅甸硬玉表面存在大量残余变形现象 ,尤其是以典型的扭折带、亚晶粒、晶粒扭曲结构为特征 ,反映了硬玉晶体内聚集了大量的位错。这些现象表明硬玉在其结晶之后曾在高压及较高温的地壳深处经历了强烈的塑性变形过程 ,它们与地表或近地表低温、低压条件下形成的以脆性破裂为主的变形方式有本质的差别。硬玉中大量的塑性变形现象表明了它是在比较复杂的动态地质环境中形成的 ,深部的这种复杂变形作用使得缅甸硬玉有别于世界上其它地方的硬玉 ,其独特的地质形成过程造就了本区为世界上典型的也是最大的翡翠矿床。
Atomic force microscopy (AFM) was used to observe the surface of Burma jadeite, and to investigate the ultra-microstructure and structural features of the mineral crystals in the nanoscale range. The dynamic processes and physicochemical conditions were also discussed. The results show that there are a large number of residual deformations on Burma jadeite surface, especially typical kink bands, subgrains and grain distortions, which reflect a large number of dislocations accumulated in the jadeite crystals. These phenomena indicate that after its crystallization, jadeites experienced strong plastic deformation processes in the high and high temperature crustal depths. They are essential to the brittle fracture-dominated deformation mode formed at low temperature and low pressure on the surface or near the surface difference. The large amount of plastic deformation in jadeite indicates that it is formed in a relatively complex dynamic geological environment. The complex deformation in the depths makes Burmese jadeite different from jadeite in other parts of the world, and its unique geological formation has resulted in This area is the world’s largest and largest jade deposit.