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本文阐述火山凹地银-多金属矿与流纹岩次火山侵入体形成过程的关系,指出矿床属于斑岩型银矿床,而矿床定位则取决于含矿流纹岩体穹窿部分的形态和内部结构。近10—15年来,许多国家(美国、加拿大、墨西哥等)都查明了一批网脉状银矿床,并正在对这类矿床积极地进行研究。这类银矿床与硅铝质褶皱基底上的陆缘火山带和内陆火山带有关,通常赋存于一些有大量流纹质和英安质次火山岩体的、火山-构造成因的局部破火口型构造中。矿体以细脉-浸染
This paper describes the relationship between volcanic Au-Ag-polymetallic ore and rhyolite subvolcanic intrusive bodies, and points out that the deposit belongs to the porphyry-type silver deposit. The ore deposit orientation depends on the morphology and internal structure of the ore-bearing rhyolite dome . In the past 10 to 15 years, many countries (the United States, Canada, Mexico, etc.) have identified a number of reticulated silver deposits and are actively studying such deposits. These silver deposits are associated with the marginal volcanic belt and the inland volcanic belt on the silico-aluminum folds, and usually occur in some volcanic-tectonic local breakers with a large number of rhyolitic and quartz amphibolite bodies In construction. Ore body with vein - dip