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最近在大别山北麓的皇城山,发现了产于陆相火山岩、次火山岩中的中低温热液银矿床,为河南增添了一新类型。其主要地质特征简介如下: 一、区域及矿区地质概况: 皇城山银矿地处华北地台南缘,秦岭地槽褶皱系的东段,紧邻桐柏——商城大断裂北侧,这里构造和火山活动均比较强烈。(图1) 矿区的南部,出露下古生界信阳群龟山组(Zg),为浅变质的白云石英片岩、含榴云母石英片岩夹斜长角闪片岩。地层倾向南南西。与歪庙组酸性熔岩呈构造接触。矿
Recently, in Huangcheng Mountain in the northern foot of the Dabie Mountains, the discovery of intermediate-low-temperature hydrothermal silver deposits in continental volcanic rocks and subvolcanic rocks has added a new type to Henan. The main geological features are summarized as follows: I. Geological overview of the region and its mining area: The Huangshanshan Silver Mine is located in the southern margin of the North China Platform and the eastern segment of the Qinling Gn-trough fold system and is adjacent to the north side of the Tongbai-Shangcheng Grand Fault. Volcano activity are more intense. In the southern part of the mining area (Fig. 1), the lower Guzhan Formation (Zg) of the Lower Paleozoic is exposed as a meta-metamorphic dolomite schist which contains plagioclase amphibolite with a pluvialite quartz schist. Stratigraphy South-west. And crooked temple group acidic lava tectonic contact. mine