Zircon U-Pb age and Hf isotopic characteristics of the Huangtuliang monzonitic granite, North Hebei Province, China  

作　　者：HU Huabin NIU Shuyin ZHANG Zhanyang TIAN Ye LIU Xiaoyu CHEN Xicai CHEN Haijiao 

机构地区：[1]College of Resources,Shijiazhuang University of Economics [2]Congli Zhijin Mining Industry Limited Liability Co

出　　处：《Chinese Journal Of Geochemistry》2014年第1期1-8,共8页中国地球化学学报

基　　金：financially supported jointly by the Geological Investigation Item sponsored by the China Geological Survey (No. 1212011220492);the Scientific Research Base of China’s Typical Metallic Ores (No. 200911007);the National Natural Science Foundation of China (40872137)

摘　　要：The Huangtuliang monzonitic granite outcrops on the northern side of the Huangtuliang gold mining district, Chicheng, North Hebei Province. Our predecessors only made isotopic age determination using the K-Ar method. Through LA-MC-ICP-MS zircon U-Pb dating and zircon Hf isotopic composition determination, this study acquired the age of 244.8±2.0 Ma(MSWD=0.57) on the basis of the weighed mean 206Pb/238U ratio, indicating that the Huangtuliang monzonitic granite was formed during the Middle Triassic period, which is the product of Early Indosinian magmatic activities in the region of North Hebei. εHf(t) values vary relatively evenly, within the range of-10.65--14.03, with an average of-12.14. The two-stage evolution model ages, tDM2, vary between 1943 and 2144 Ma, implying that the rock-forming materials of the Huangtiliang monzonitic granite mainly came from the Paleoproterozoic recirculated crustal materials, though a small quantity of enriched-mantle materials would have been involved.The Huangtuliang monzonitic granite outcrops on the northern side of the Huangtuliang gold mining district, Chicheng, North Hebei Province. Our predecessors only made isotopic age determination using the K-Ar method. Through LA-MC-1CP-MS zircon U-Pb dating and zircon Hf isotopic composition determination, this study acquired the age of 244.8：k2.0 Ma （MSWD=0.57） on the basis of the weighed mean ^206pb/238U ratio, indicating that the Huangtuliang monzonitic granite was formed during the Middle Triassic period, which is the product of Early Indosinian magmatic activities in the region of North Hebei. eHf（t） values vary relatively evenly, within the range of -10.65- -14.03, with an average of-12.14. The two-stage evolution model ages, tDM2, vary between 1943 and 2144 Ma, implying that the rock-forming materials of the proterozoic recirculated crustal materials, though a involved. Huangtiliang monzonitic granite mainly came from the Paleo- small quantity of enriched-mantle materials would have been

关 键 词：锆石U-Pb年龄 二长花岗岩 冀北地区 同位素特征 HF 锆石U-Pb定年 同位素年龄测定 加权平均值 

分 类 号：P588.121[天文地球—岩石学]