Zircon Hf Isotope Mapping for Understanding Crustal Architecture and Its Controls on Mineralization during Early Cretaceous in the Southern Great Xing'an Range,NE China  

作　　者：Feng Yuan Huanan Liu Shengjin Zhao Mingjing Fan 

机构地区：[1]State Key Laboratory of Geological Processes and Mineral Resources,Collaborative Innovation Center for Exploration of Strategic Mineral Resources,School of Earth Resources,China University of Geosciences,Wuhan 430074,China [2]State Key Laboratory of Geological Processes and Mineral Resources,School of Earth Sciences and Resources,China University of Geosciences,Beijing100083,China [3]No.10 Institute of Geological Exploration,Inner Mongolia Bureau of Geology and Mineral Resources,Chifeng 024000,China [4]Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China

出　　处：《Journal of Earth Science》2024年第1期41-50,共10页地球科学学刊（英文版）

基　　金：funded by the National Natural Science Foundation of China(No.41903043);China Postdoctoral Science Foundation(No.2018M642948);Program of China Geological Survey Bureau:1:50000 Regional Geological Survey of Tubuqin,Bayar Tuhushuo,Hadayingzi,Alahada,and Yidanjialaga in Inner Mongolia(No.DD20160048-15)。

摘　　要：Voluminous Early Cretaceous granitoids and associated large-scale ore deposits are distributed within the southern Great Xing'an Range(SGXR),NE China.Based on previously published geochronology and zircon Hf-isotope data,Hf isotope mapping is undertaken to improve our understanding of crustal architecture and its controls on ore deposits.The ore-related Early Cretaceous granitoids were sourced predominantly from juvenile crust,with the involvement of variable proportions of ancient crustal materials.The crustal architecture,as inferred from Hf isotopic contour maps,indicates two distinct Hf isotopic domains in SGXR,including(1)a higher-ε_(Hf)(+7 to+11)juvenile crust containing minor ancient crustal material,and(2)a lower-ε_(Hf)(+2 to+6)juvenile crust containing a greater proportion of ancient crustal materials.The Hf isotopic maps identify links between crustal architecture and regional metallogeny.Copper deposits and other deposits with significant Cu production are restricted mainly to the higher-ε_(Hf)juvenile crustal regions in the northern and eastern SGXR.Deposits dominated by other metals(e.g.,Mo,Sn,W,Pb,Zn,and Ag)occur mainly in the lower-ε_(Hf)juvenile crustal regions in the southern and western SGXR.Interaction between juvenile crust-derived melts and ancient crustal components played an important role on the distribution of various ore metals.

关 键 词：Hf isotope mapping crustal architecture large-scale Early Cretaceous granitoids distribution of ore deposits southern Great Xing'an Range zircon 

分 类 号：P612[天文地球—矿床学] P534.53[天文地球—地质学] P542