沉积与特提斯地质2024，Vol.44Issue(2)：437-453,17.DOI:10.19826/j.cnki.1009-3850.2024.04006
滇东南薄竹山矿集区晚白垩世岩浆活动及锡银铅锌钨多金属成矿作用
The Late Cretaceous magmatism and Sn-Ag-Pb-Zn-W polymetallic mineralization in Bozhushan ore concentration area,southeast Yunnan
摘要
Abstract
The tin-silver-lead-zinc-tungsten polymetallic ore concentration area of Bozhushan is located at the western edge of the South China Fold System and is an important part of the magmatic-mining belt in southeast Yunnan.The mineral resources in the area are rich,mainly tin-silver-zinc-tungsten deposits,and some other metal minerals(e.g.lead-zinc-iron-copper minerals).All the deposits are distributed around the Bozhushan rock body,among which the Bainiuchang ultra-large silver-polymetallic mine and the Guanfang large tungsten mine are the most typical.Studies have shown that the formation of the tin-silver-lead-zinc-tungsten deposits in the Bozhushan ore district is closely related to the Late Cretaceous magmatism,with the complex rock formations dating back to 91.2 to 84.1 Ma ago,and are the product of Late Cretaceous magmatism.The Late Cretaceous acidic magma was massively intruded along the intersection of the core of the Bozhushan anticline and the north-west trending fracture zone,and eventually led to the formation of the Bozhushan complex granite body and the Bainiuchang concealed granite body under the top-supporting and bottom-splitting action of the magma.The granite bodies of the Bozhushan unit show consistent geochemical characteristics with the Bainiuchang monzonitic granite and granite porphyry,as well as the Tuanshan and Guanfang granites,which are silica-rich(SiO2 content of 65.48%～74.92% )and potassium-rich(K2O content of 4.17%～6.06% ).The rocks are enriched in light rare earth elements(LREEs),clearly enriched in large ion lithophile elements(LILEs),and relatively deficient in high field strength elements(HFSEs),with moderate negative europium anomalies.They belong to calcium alkaline to high potassium calcium alkaline quasi-aluminous to peraluminous S-type granites which formed in a geotectonic context of synclinal orogeny and transition to a post-collisional orogenic environment,being the result of orogeny.The migration and enrichment of mineralised material in the area mainly revolves around the granite bodies,led to the formation of siliciclastic W,Sn,and Fe deposits in the granite contact zone,magmatic hydrothermal Ag,Pb-Zn,Sn,and Cu in the clastic-carbonate construction and low-temperature hydrothermal Sb ores in the peripheral strata,which constitute a relatively complete magmatic hydrothermal mineralization system related to granite intrusion in the region.关键词
晚白垩世/花岗岩/构造岩浆活动/锡银铜铅锌多金属矿/薄竹山矿集区Key words
The Late Cretaceous/granite-tectonic magmatic activity/Sn-Ag-Pb-Zn-W polymetallic deposit/Bozhushan ore concentration area/southeast Yunnan分类
天文与地球科学引用本文复制引用
刘学龙,陆波德,刀俊山,刘益,陈显超,李文昌,张世涛,龙启和,蒙光志,张红,周杰虎,程家龙,朱俊..滇东南薄竹山矿集区晚白垩世岩浆活动及锡银铅锌钨多金属成矿作用[J].沉积与特提斯地质,2024,44(2):437-453,17.基金项目
昆明理工大学"双一流"科技专项课题"薄竹山燕山晚期岩浆成矿系统及成矿规律研究"(202202AG050006-2) （202202AG050006-2）
云南省高层次科技人才及创新团队选拔专项(202305AT350004-4) （202305AT350004-4）
云南省三江成矿系统与评价顶尖团队培育项目(202305AS350015) （202305AS350015）
云南省万人计划"青年拔尖人才"专项(20190028) （20190028）
