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Robust Timing Constraints for Granitic Magmatism and Hydrothermal Mineralization in the Tieshanlong W-Sn Ore Field,Eastern Nanling Range,South China

引用

Acta Geologica Sinica(English Edition) 2024年第5期98卷 1255-1269页

作者： LI Wei TANG Juxing GuO Na LANG Xinghai SONG Shiwei Wu Zhongru PENG Linlin FANG Xiang CHEN Binfeng LIAN Dunmei Lu Jie The Seventh Geological Brigade of Jiangxi Bureau of Geology Key Laboratory of Ionic Rare Earth Resources and EnvironmentGanzhouJiangxi 341000China College of Earth and Planetary Sciences Chengdu University of TechnologyChengdu 610059China Jiangxi Province Key Laboratory of Exploration and Development of Critical Mineral Resources Nanchang 330036China MNR Key Laboratory of Metallogeny and Mineral Resource Assessment Institute of Mineral ResourcesCAGSBeijing 100037China Institute of Earth Sciences China University of GeosciencesBeijing 100083China Jiangxi Geological Bureau Nanchang 330036China Chinese Academy of Geological Sciences Beijing 100037China

The Tieshanlong ore field is an important part of the Nanling Range,which is famous worldwide for its W-Sn ***,the mineralization age of the Tieshanlong ore field is not well constrained,and our field investigation reveals that granitic emplacement occurred at different ***,previous studies have not distinguished these multiple stages of *** Tieshanlong granite complex is closely related to the Huangsha quartz vein-type W-Sn deposit and Tongling skarn-type Cu-W-Sn deposit in this *** field investigations and isotopic age analyses,this work studies the relationship between multistage magmatic activity and mineralization in the Tieshanlong ore ***-ICP-MS zircon u-pb isotope analyses revealed that the first-and second-staged granites formed at 154.2±0.6 Ma(MSDW=1.4)and 151.2±0.4 Ma(MSDW=1.5),with zirconε_(Hf)(t)values ranging from-13.1 to-10.5 and from-14.7 to-11.1,*** data suggest that the Tieshanlong granite complex was derived from the partial melting of ancient crustal ***-ICP-MS u-pb dating of wolframite and cassiterite reveals that W-Sn mineralization occurred at 160-150 Ma,which agrees well with the u-pb dating results of the second-staged granite within analytical *** magmatic activity in this ore field can be divided into three stages:175-154 Ma,154-150 Ma and 150-145 *** quartz vein-and skarn-type W-Sn mineralization is closely related to second-staged fine-grained twomica granite,and formed earlier than skarn-type *** study establishes a metallogenic model for the Tieshanlong ore field,and this model has important practical significance for identifying concealed W-Sn(-Cu)deposits around other granitic complexes in the Nanling Range.

关键词： zircon u-pb-Hf isotopes wolframite u-pb ages cassiterite u-pb ages metallogenic model Tieshanlong ore field Nanling Range

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