Long-lived Nb-Ta mineralization in Mufushan,NE Hunan,South China:Geological,geochemical,and geochronological constraints

作     者：Nuerkanati Madayipu Huan Li Thomas J.Algeo Safiyanu Muhammad Elatikpo Rub'son N'nahano Heritier Hou-Xiang Zhou Han Zheng Qian-Hong Wu Nuerkanati Madayipu;Huan Li;Thomas J.Algeo;Safiyanu Muhammad Elatikpo;Rub'son N'nahano Heritier;Hou-Xiang Zhou;Han Zheng;Qian-Hong Wu

作者机构：Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring(Central South University)Ministry of EducationChangsha 410083China School of Geosciences and Info-PhysicsCentral South UniversitySouth Lushan RoadChangsha 410083China State Key Laboratory of Geological Processes and Mineral ResourcesSchool of Earth ResourcesChina University of GeosciencesWuhan 430074China State Key Laboratory of Biogeology and Environment GeologySchool of Earth SciencesChina University of GeosciencesWuhan 430074China Department of GeologyUniversity of CincinnatiCincinnatiOH 45221-0013 USA Hunan Provincial Institute of Land and Resources PlanningChangsha 410007China 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2023年第14卷第1期

页      面：310-326页

核心收录：

学科分类：070902[理学-地球化学] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 070901[理学-矿物学、岩石学、矿床学] 0708[理学-地球物理学] 

基　　金：the National Natural Science Foundation of China(No.92162103) the Natural Science Foundation of Hunan Province(No.2021J30699) the Geological Exploration Project of the Hunan Provincial Institute of Land and Resources Planning(Grant No.20190604) the Science and Technology Innovation program of the Hunan Province(Grant No.2021RC4055) the Fundamental Research Funds for the Central Universities of Central South University(Grant No.CX20200310) 

主　　题：Zircon Coltan Monazite Fluid evolution Pegmatite Rare-metal deposit 

摘      要：The Mufushan Complex(MFSC),located in northeastern Hunan,is a significant producer of Nb-Ta-Li-Be rare metals in South *** present study examines the genetic relationship,material provenance,fluid evolution,and metallogeny of the co-developed ore-free pegmatite(OFP)and ore-bearing pegmatite(OBP)in granite-related pegmatite-type Nb-Ta rare-metal deposits in *** minerals(columbite-tantalite(coltan),zircon,and monazite)were chosen for *** coltan grains display both primary crystallization structures(crystal homogeneity,oscillatory zonings,and primary growth rims)resulting from equilibrium and disequilibrium reactions due to localized changes in the physicochemical conditions and environment,as well as later replacement structures(alteration rims,patches,irregular zonations,and complex zonations)from metasomatic replacement processes related to hydrothermal fluid *** coltan yielded two weighted mean^(206)Pb/^(238)U ages of 138.1±2.1 Ma and 125.3±2.0 Ma corresponding to magmatic and hydrothermal Nb-Ta mineralization *** the OFP,zircons also yielded two weighted mean^(206)Pb/^(238)U ages of 138.4±0.8 Ma and 131.5±0.7 Ma,whereas monazite gave a weighted mean U-Pb age 142.9±1.2 *** ages of 142-138 Ma and 131 Ma represent the early and late stages of OFP crystallization and barren pegmatites in the MFSC,*** Lu-Hf isotopic compositions link rare-metal metallogenesis to the Lengjiaxi Group,which was the source material to the Mufushan composite ***ε_(Hf)(t)values and TDM2 ages from the OFP(-7.6 to-3.6 and 1676-1418 Ma,respectively)and the OBP(-14.1 to+4.9 and 2976-1548 Ma,respectively)are akin to those of schists and metasandstones of the metasedimentary Lengjiaxi *** propose a long-lived(ca.13-Myr)event involving two metallogenic episodes of Nb-Ta mineralization in the Mufushan *** study demonstrates the potential of zircon,coltan,and monazite for fingerprinting minerals and classifying the m