地质与资源2018，Vol.27Issue(1)：48-53,6.
辽宁树基沟铜锌矿床成矿时代——来自斜长角闪片麻岩锆石U-Pb同位素的制约
METALLOGENIC AGE OF SHUJIGOU COPPER-ZINC DEPOSIT IN LIAONING PROVINCE: Constraints from the Zircon U-Pb Isotopes of Plagioclase Amphibolite Gneiss
路睿 1周瑾 1张学德 1于小亮 1保善斌 1李嘉泰 1杨延乾1
作者信息
摘要
Abstract
The Shujigou Cu-Zn deposit of VMS type occurs in the granite-greenstone belt in east section of northern margin of the North China Platform.The crystallization age of 2564±2 Ma for the host plagioclase amphibolite gneiss is obtained with LA-ICP-MS zircon U-Pb dating technique,which can approximately represent the metallogenic age.According to the published mantle zircon U-Pb age (2517-2529 Ma),it is considered that the Shujigou Cu-Zn deposit underwent metamorphism,deformation and remobilization during the later Anshan Orogeny.Combined with the geochemical characteristics and evolution of the host rock,it is inferred that the mineralization is involved with partial melting of mantle to form base metal-rich magma during plate subduction.With upward migration,convergence,eruption,consolidation and diagenesis of the magma,ore-forming elements leached by seawater are infiltrated and enriched in the igneous rocks,which then erupt to the surface along faults with deep permeability.Finally,the hydrothermal fluid is mixed with surrounding seawater,followed by further metamorphism and deformation to form the Cu-Zn deposit.关键词
树基沟铜锌矿床/斜长角闪片麻岩/成矿时间/锆石U-Pb定年/辽宁省Key words
Shujigou Cu-Zn deposit/plagioclase amphibolite gneiss/metallogenic age/zircon U-Pb dating/Liaoning Province分类
天文与地球科学引用本文复制引用
路睿,周瑾,张学德,于小亮,保善斌,李嘉泰,杨延乾..辽宁树基沟铜锌矿床成矿时代——来自斜长角闪片麻岩锆石U-Pb同位素的制约[J].地质与资源,2018,27(1):48-53,6.
