陕西镇安县甘脑沟银金矿地质特征及控矿因素分析

Geological characteristics and ore-controlling factors of Gannaogou silver-gold deposit in Zhen'an County,Shaanxi

甘脑沟银金矿地处南秦岭造山带边缘海盆中部,区内主要出露地层有泥盆系、石炭系。含矿地层主要为下泥盆—上石炭统九里坪组粉砂质板岩,受断裂构造控制。区域上成矿背景十分有利。区内外已发现矿(化)点、矿床较多,外围已发现并评价的矿产地有二台子矿床、铁炉沟金矿床等。已在区内九里坪组地层中发现了多条金、银矿体,成矿类型为构造—热液蚀变型。

The Gannaogou silver-gold deposit is located in the middle of the sea basin on the edge of the South Qinling orogenic belt.The main exposed strata in the area are Devonian and Carboniferous.The ore-bearing strata are mainly silty slate from the Lower Devonian to the Upper Carboniferous Jiuliping Formation,which is controlled by the fault structure.The regional metallogenic background is very favorable.There are many mineralization(chemical)spots and deposits in the area and outside.Ertaizi deposits and Tielugou gold deposits have been discovered and evaluated in the periphery.A number of gold and silver ore bodies have been found in the formation of the Jiliping Formation in the area.The metallogenic type is tectonic-hydrothermal alteration.