山东招远-掖县地区蚀变岩型金矿找矿评价中用黄铁矿晶体形貌填图的初试

一、地质矿物填图的意义和任务地质矿物填图是苏联最近报导过的地质领域内的新事件.国外文献只见简要的叙述,实例不多.国内地质界尚未作过这方面的尝试.由于地表露头矿日益减少,地质找矿的难度逐年增大,探寻隐伏矿已成为当前地质科研工作的重要课题.苏联学者用矿物学方法进行矿产评价并将这方面的理论和方法总结成为一门新的地质学分支——找矿矿物学.地质矿物填图就是应用找矿矿物学的知识,把矿物标型特征填在地质图上,通过资料分析以评价矿床.

A PRIMARY TEST OF GEOLOGICAL MAPPING APPLYING PYRITE CRYSTAL, FORM FEATURES IN EVALUATING ALTERED TYPE GOLD DEPOSITS AT ZHAO-YE DISTRICT, SHANDONG PROVINCE

The research about pyrite crystal form from five major gold deposits and some other ones has shown that the pyrite crystal form changes with the depth of orebodies.Octahedron appears in the upper part of the orebody,with the combinate form of octahedron and cubeo,a(111)+(100)next to it,followed by the combinate form of octahedron and pentagohal dodecahedron o,e(111)+(210),with the pentagonal-dodecahedron next to it,and in the root part is pentagonal-dodecahedron-cube,a,e(100)+(210).According to this criterion,in the vertical section of an orebody if the mark of upper part is absent,one might conclude that it must have undergone erosion.If the pyrite crystal form appears abhormal,two situations could be presumed:(1)the orebody was moved to the upper part by a reverse faulting;(2)blind ores occurred in the depth.