墨西哥纳亚里特州La Yesca锰银多金属矿床地质特征及找矿远景  

GEOLOGICAL CHARACTERISTICS AND PROSPECTING POTENTIAL OF LA YESCA MANGANESE-SILVER POLYMETALLIC DEPOSIT IN NAYARIT, MEXICO

作　　者：刘登锋[1] 毕启尊 韩天成[1] 魏远[1] LIU Deng-feng;BI Qi-zun;HAN Tian-cheng;WEI Yuan(The First Geological Institute,Henan Bureau of Geology and Mineral Exploration and Development,Zhengzhou 450000,China)

机构地区：[1]河南省地质矿产勘查开发局第一地质勘查院,河南郑州450000

出　　处：《地质与资源》2021年第4期443-449,442,共8页Geology and Resources

基　　金：Infini Resources S.A.de C.V.Mexico(墨西哥英菲尼资源有限公司)“墨西哥纳亚里特州La Yesca矿区银多金属矿普查”项目.

摘　　要：墨西哥纳亚里特州La Yesca银多金属矿床位于墨西哥马德里造山带东南端,是近年来发现的大型银锰多金属矿床.矿床产出于新生代中—中酸性火山碎屑岩组中,矿体形态、规模、产状严格受新生代岩浆活动和北西向断裂构造控制.水系沉积物测量圈定出3个综合异常,经地表探槽和钻探验证,在其中2个异常区内均发现工业矿体.通过对区域地质背景、矿床地质特征及控矿因素的分析研究,认为该矿床为与新生代火山活动有关的浅成低温热液银锰多金属矿床,且矿床深部及外围仍具有较大的找矿潜力,具有发现特大型浅成低温热液型银多金属矿床的可能.La Yesca silver polymetallic deposit,located in the southeast of Madrid orogenic belt in Nayarit,Mexico,is a large Mn-Ag polymetallic deposit discovered in recent years.The deposit is occurred in the Cenozoic acid intermediate-intermediate pyroclastic rock formation,with shape,scale and occurrence of orebodies strictly controlled by Cenozoic magmatism and NW-trending faults.Three comprehensive anomalies are delineated by stream sediment survey,from two of which,industrial ore bodies are found by surface trenching and drilling verification.Through analysis of regional geological background,geological characteristics and ore-controlling factors of deposit,it is considered that the deposit is an epithermal Ag-Mn polymetallic one related to Cenozoic volcanic activity,and there is still great prospecting potential in the deep and periphery of the deposit,with the possibility of finding super-large epithermal Ag polymetallic deposit.

关 键 词：地质特征 控矿因素 找矿标志 银锰多金属矿 La Yesca 墨西哥 

分 类 号：P618.32[天文地球—矿床学] P618.52[天文地球—地质学]