摘要
墨西哥地质格局由古老的基底残片与古洋壳不断增生拼合而成,共划分为斑岩型、角砾岩型,脉状、浸染状Cu-Mo-Au成矿带;岩浆热液型浸染状、脉状及网脉状Cu-Au-Ag成矿带;喷流型、接触交代型脉状及层状Pb-Zn-Cu-Ag成矿带;块状硫化物型Cu-Pb-Zn-Au-Ag成矿带;碱性金属和贵金属成矿带;IOCG铁矿床成矿带6个成矿带。并根据侵入岩侵位特征及相关矿床分布,确定中生代晚期及新生代岩浆岩矿床主要分布在墨西哥中西部西马德雷—南马德雷岛弧带上,矿床类型以斑岩型、夕卡岩型、浅成低温热液型、块状硫化物型、热液交代型、喷流沉积型、铁氧化物铜金型(IOCG)为主。文章介绍了墨西哥的地质概况、成矿分带、与侵入岩相关的矿床分布规律及特征。
The geological framework in Mexico is composed of old basement fragments and the continuous accretion of ancient ocean crust.The metallogenic zoning in Mexico can be divided into following belts：Cu-Mo-Au metallogenic belt including porphyry type,breccia type disseminated and vein type deposits ; Au-Ag-Cu metallogenic belt compositing magmatic hydrothermal disseminated,vein,and veinlets type deposits ; Zn-Pb-Ag-Cu metallogenic belt including exhalitive type and contact replacement type vein type and layered type deposits; VMS type Au-Ag-Zn-Cu-Pb metallogenic belt; alkaline metals and noble metal metallogenic belt; IOCG type iron metallogenic belt.According to the characteristics of intrusive rocks emplacement and distribution of associated ore deposits,it is determined that the magmatic ore deposits of Mesozoic and Cenozoic periods are mainly distributed in Sierra Madre Occidental-Sierra Madre del Sur Island arc belt,the deposit types include porphyry type,skarn type,epithermal type,massive sulfide type,hydrothermal metasomatic type,SEDEX type and iron oxide copper gold （IOCG） in this belt.This paper introduces the geological characteristics,metallogenic zoning and distribution regularities and characteristics of ore deposits related to magmatic intrusions.
出处
《矿产勘查》
2014年第4期663-671,共9页
Mineral Exploration
关键词
成矿分带
侵入岩
墨西哥
metallogenic zoning
intrusive rock
Mexico
