论文部分内容阅读
中国南部黑鎢矿脈狀矿床的圍岩蝕變現象以云英岩化,矽化及絹云母化为主。茲分別就其存在的地質条件,岩石的形态及大小、物理性質、矿物成分、化学成分、形成过程及其含矿性等作如下的分析研究。一云英岩化 (一) 云英岩化存在的地質条件云英岩化主要形成在花崗岩、石英斑岩、閃長岩、閃長玢岩、变質砂岩、板岩、千枚岩以及砂岩等岩石中的矿脈边部及其附近,或呈單獨在。它們常常出現在不大的侵入體中,或是岩基的岩鏡等部,或是向上滲入很远而至侵入體的岩枝和它的上复岩层中。
Wall rock alteration in the wolframite vein-type deposits in southern China is dominated by kyanite, silicification and sericitization. The following are the analysis of the geological conditions of their existence, the shape and size of rock, physical properties, mineral composition, chemical composition, formation process and its ore content. Geotectonicism of a Yunyanite (a) Precipitation of the Yunyanite Geotectonicization of the Yunying Formation occurs mainly in granite, quartz porphyry, diorite, diorite, metamorphic sandstone, slate, phyllite and sandstone The edge of the veins in and around the rock, or in isolation. They often appear in small intrusions, rock basses and other parts of the rock or infiltrate upward into the intruding rock branches and its upper strata.