辽宁省莺歌地银铅锌多金属矿区地质特征与找矿远景研究

Geological characteristics and prospecting potential of Yinggedi Ag-Pb-Zn polymetallic deposit in Liaoning Province

本区位于辽东裂谷成矿带上,莺歌地银铅锌多金属矿的形成,经历了一个长期、多阶段的复杂地质作用过程。该矿床属于层控岩浆热液矿床,在岩浆热液的作用下,矿质发生活化转移并沿着周围的构造裂隙充填交代成矿。通过对该区成矿地质条件分析,认为成矿热液和矿区北部花岗闪长岩岩体活动密切相关。自Ⅳ号矿化带至Ⅰ号矿化带,硅化逐渐变弱,推测岩体下部有和它相连的隐伏岩体,并初步圈定了三个成矿远景区,为下一步找矿工作指明了方向。

This area is located in the Liaodong rift metallogenic belt,the mineralization of Ag-Pb-Zn in Yinggedi is a long-term and multi-stage geologic process which functioned complexly.The deposit belongs to stratabound magmatic hydrothermal deposit,under the action of magmatic hydrothermal fluid,the minerals are transferred to the whole body and filled with the surrounding structural fractures.Based on the analysis of the metallogenic geological conditions in this area,it is considered that the ore-forming fluid is closely related to the activity of granodiorite.From No.Ⅳto No.Ⅰ mineralized zone,silicification becomes weak,it is concluded that the rock body and concealed rock are connected,and the preliminary delineation of the three metallogenic province,pointed out the direction for further prospecting work.