河南省方城县桃园金多金属矿地质特征及成因

研究区位于河南省方城县，大地构造位置处于伏牛山东麓，熊背-拐河金多金属成矿带。区内构造活动强烈，岩浆活动频繁，集地层、构造和岩浆活动于一体，是金多金属矿的成矿有利地区。区内燕山期花岗岩极为发育，两侧早期存在的两条规模巨大的韧性剪切带：黄土岭-郭沟和上官庄-薄地川韧性剪切带，明显构成“一体两带”的有利成矿环境。矿区成矿热液来源于上地幔岩浆水，并混合了部分热卤水，经多期分溢、沉淀，最终在构造有利部位形成矿体。研究认为矿区分为南、北两个成矿带，各个成矿带存在不同的成矿特征及矿化富集规律。

Geological characteristics and genesis of the Taoyuan Au polymetallic deposit in Fangcheng County,Henan Province

The studying area located in Fangcheng County of Henan Province with its tectonic location in the Xiongbei-Guaihe Au polymetallic mineralization belt on east pidmont of Funiushan. The area is favorable for the formation of Au polymetallic deposit because of its strong tectonic activities, frequent magma activities, and the incorporation of activities of strata, structure and magma. The Yanshanian granite develops well in this area, on the both side of which there are two gigantic ductile shear zones, that are Huangtuling-Guogou and Shangguanzhuang-Bodichuan ductile shear zones which obviously formed a favorable metallogenic environment of ＂one body and two zones＂. The ore-forming hydrotherm in the ore area came from upper mantle magmatic water and were mixed with some hot brine, then spilled and deposited for multi-periods, and formed orebody in favorable tectonic places at last. The research has believed that the ore area can be classified into south and north metallogenic zones with each having different ore-forming characteristics and mineralization with enrichment rules.