地质通报2024，Vol.43Issue(6)：885-895,11.DOI:10.12097/gbc.2022.04.032
黑龙江多宝山铜矿区韧性剪切变形时代及其对铜矿化改造的约束
The age of ductile shear deformation and its constraint on Cu mineralization transformation in Duobaoshan Cu deposit,Heilongjiang Province
摘要
Abstract
The Duobaoshan porphyry Cu deposit is mainly found in Ordovician granodiorite,with minor occurrences in Ordovician granodiorite porphyry and andesite of the Duobaoshan Formation.The copper mineralization is primarily disseminated and levee-disseminated.The metallogenic process encompasses a porphyry stage and a shear deformation stage.A ductile shear deformation zone exists in the mining area,involving the Duobaoshan Formation,granodiorite,granodiorite porphyry,andesitic tuff breccia,and ore bodies.New sericite minerals develop along the shear plane.The plateau age,isochron ages and inverse isochron ages of sericite are 280.1±1.2 Ma,281.4±1.3 Ma,and 281.3±1.3 Ma,respectively,which are consistent within error ranges.The ductile shear deformation occurred during the Early Permian(about 280 Ma).The primary mineralization of the Duobaoshan porphyry copper deposit formed in the Early Ordovician(about 475 Ma).The Early Permian ductile shear deformation reshaped the original copper mineralization,further enriching the copper content and increasing the grade.关键词
韧性剪切带/Ar-Ar年龄/斑岩型铜矿床/多宝山/黑龙江/矿产勘查工程Key words
ductile shear zone/Ar-Ar age/porphyry Cu deposit/Duobaoshan deposit/Heilongjiang Province/mineral exploration engineering分类
天文与地球科学引用本文复制引用
刘宝山,张春鹏,寇林林,李成禄,韩仁萍,王宇利,杨宏智..黑龙江多宝山铜矿区韧性剪切变形时代及其对铜矿化改造的约束[J].地质通报,2024,43(6):885-895,11.基金项目
国家重点研发计划课题《典型矿集区三维地质结构与矿体定位》(编号:2017YFC0601305)和中国地质调查局项目《东北地区铜金稀有金属战略性矿产资源调查》(编号:DD20230028) （编号:2017YFC0601305）
