墨西哥锡那罗亚州圣胡安金银矿地质特征及矿床成因

Geological Characteristics and Genesis of Gold and Silver Deposits in San Juan, Sinaloa, Mexico

墨西哥锡那罗亚州圣胡安金银矿位于西马德雷火山岩带内,在区域成矿带划分上处于斑岩型Cu-Au-Mo成矿带向浅成低温热液型Au-Ag过渡区域。本文通过对矿区地质特征和矿床地质特征的综合研究,从构造、蚀变的特征和期次的划分入手,提出了圣胡安金银矿属于浅成低温热液型Au-Ag矿床,并分析了本区成矿演化阶段。

The San Juan gold and silver deposit in Sinaloa,Mexico,is located within the Shimadre volcanic belt and is divided between the porphyry Cu-Au-Mo mineralization zone and the epithermal Au-Ag transition zone in the regional metallogenic belt division.Based on the comprehensive study of the geological characteristics of the mining area and the geological characteristics of the deposit,this thesis starts with the structure,characteristics of the alteration and the division of phases,and proposes that the San Juan gold and silver deposit belongs to the epithermal Au-Ag deposit,and analyzes the District metallogenic evolution stage.