四川石棉矿蛇纹石矿物学研究

四川石棉矿产出四种蛇纹石矿物:纤蛇纹石,Povlen型纤蛇纹石、利蛇纹石和叶蛇纹石。它们的形态、结构、化学成分和红外光谱各具特征,本文对此进行了描述和讨论。纤蛇纹石以纵纤维脉和横纤维脉形式产出,以斜纤蛇纹石为主,含少量正纤和副纤蛇纹石。纵纤维蛇纹石可能由地壳浅层中的大气热水形成。Povlen型纤蛇纹石是蛇纹石族矿物的一个新变种,其形态、结构和化学成分都不同于其他蛇纹石矿物。

A MINERALOGICAL STUDY ON SERPENTINE MINERALS FROM THE SICHUAN ASBESTOS DEPOSIT

In the Sichuan asbestos deposit there have been identified four species of serpentine mineral: chrysotile, povlen-type chrysotile, lizardite and antigorite. Their characteristics pertaining to morphology, crystal structure, chemical composition and infrared spectrum are described and discussed in this paper. Chrysotile occurs in the form of slip-and cross-fiber veins and consists mainly of clino-chrysotile, with small amounts of ortho- and para-chrysotile. Slipfiber asbestos is probably formed by water of meteoric-hydrothermal derivation at relatively shallow levels in the crust. The povlen-type chrysotile is a new variety of serpentine mineral. Its morphology, crystal structure and chemical composition are different from those of other serpentine minerals.