贵州省冗里软玉矿的发现及意义

The discovery of the Rongli nephrite deposit in Guizhou Province and its significance

冗里透闪石玉是近年贵州首次发现的高档软玉,软玉矿体产于基性岩与燧石灰岩的接触变质带上。矿石中的透闪石含量大于95%,具放射状纤维变晶结构、毛毡状变晶交织结构,致密块状构造。玉石种类主要有白玉、青白玉及青玉,具弱油脂-油脂光泽,偶见蜡状光泽。矿体规模大、玉石品质佳,其成因与新疆和田玉及青海软玉不同,属于基性侵入岩与钙质碳酸盐岩接触交代型矿床,是近年国内新发现的另一种成因类型的透闪石软玉矿床,具有重要的研究价值和广阔的开发利用前景。

The Rongli tremolite jade deposit is the only high-grade nephrite deposit in Guizhou Province, which was discovered in the last year by the authors. The Rongli nephrite deposit occurs in the contact metamorphic belt between basic rock and flint limestone. The tremolite content of the ore exceeds 95 %. The nephrite jade has radiated fibrous blastic texture, felt-like blastic texture and compact massive structure. White jade, grayish white jade and gray jade constitute major species of the Rongli jade, which has weak greasy and greasy luster as well as rare wax luster. The ore bodies are large, and the nephrite jade is of top quality. The Rongli nephrite jade is genetically different from Hetian jade and Qinghai nephrite jade in that the Rongli tremolite jade deposit resulted from contact metasomatism between basic intrusive rock and calcium carbonate rock, thus belonging to a new genetic type of tremolite jade deposit discovered for the first time in China. The Rongli jade has important research value and favorable exploration and utilization prospects.