摘要
河南罗山县涩港镇白石坡银矿床是大别地区重要的银矿床之一,与区内中生代岩浆活动有着密切的时空、成因联系。本文应用SHRIMP方法对白石坡银矿区花岗斑岩中的锆石进行了U-Pb年龄测定,表明花岗斑岩形成于142.0±4.3Ma,这一年龄与附近花岗岩基及陈棚组火山岩的形成时代一致,反映它们是中生代同一岩浆成岩系统的产物,也记录了与银矿成矿作用有关的岩浆活动的时代。该区斑岩型钼矿、浅成火山热液型(金)银矿及膨润土等非金属矿具有密切成因联系,同属与中生代岩浆活动有关的矿床成矿亚系列。
The Baishipo Ag deposit, located in Luoshan County of Henan Province, is an important silver deposits related to Mesozoic magmatism temporal-spatially and genetically. A U-Pb age of zircons （140.6 Ma） from the ore-bearing granitic porphyry in the Baishipo silver deposit, dated by the SHRIMP II method, indicates that the ore-bearing granitic rocks formed at the same stage of a regional granitic batholith. That means the silver mineralization might happen in the Mesozoic and have a genetic relationship with granitic magmatism. All of the porphyry-type Mo deposits, epithermal-type Au-Ag deposits and bentonite deposits can be classified as a metallogenetic subseries of mineral deposits originally related to Mesozoic magamtism.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2007年第6期808-813,共6页
Acta Geologica Sinica
基金
中国地质调查局项目"我国西部重要成矿区带矿产资源潜力评估"(编号1212010535804)
"中国成矿体系综合研究"(编号1212010634002)
"我国重要矿产和区域成矿规律研究"(编号1212010633903)资助成果
