内蒙古格鲁其堆山铅锌银矿床地质特征与矿床成因分析

Geological Characteristics and Genesis of the Pb-Zn-Ag Deposits in Geluqidui Mountain of Inner Mongolia

格鲁其堆山位于额尔古纳地块中部,出露地层主要为新元古界、志留系、石炭系、白垩系、第四系地层;构造表现为褶皱和断裂构造,走向以NE向为主;侵入岩主要包括黑云母花岗岩和黑云母二长花岗岩;矿区内共发现3条铅锌银矿体,分别为Ⅱ-1、Ⅱ-2、Ⅺ-1号矿体,其中Ⅱ-1、Ⅱ-2号矿体产出在G-HT-2号异常中,Ⅺ-1号矿体产出在G-HT-Ⅺ异常中,围岩蚀变以中-低温蚀变为主,矿床成因类型为中低温热液矿床。

The Geluqidui mountain is located in the central Eergu＇Na block, the exposed strata are mainly Neoproterozoic, Silurian, Carboniferous and Cretaceous and Quaternary strata; structure displays the folds and faults to NE to the main; intrusive rocks mainly include biotite granite and biotite granite two mining area were found in 3 ; a lead zinc silver orebody, respectively, II -1, II -2, Xi -1 ore body,＇ wherein the II -1, II -2, orebody in G-HT-2 abnormality, Xi No. -1 orebody at G-HT- Xi anomaly, wall rock alteration in middle low temperature alteration, the genetic type of deposit is a meso epithermal deposit.