Zircon U-Pb geochronology and geochemistry of Houhe granite in the Xiaoshan area, southern North China Craton and their implication for regional metallogenic potential

被引：0
|
作者：
Qi N. [1 ]
Chen Y. [1 ]
Wang P. [2 ]
Wu Y. [3 ]
Xu C. [1 ]
Zhan E. [1 ]
机构：
[1] Key Laboratory of Orogenic Belt and Crustal Evolution, Peking University, Beijing
[2] Key Laboratory of Ocean and Marginal Sea Geology, Chinese Academy of Sciences, South China Sea Institute of Oceanology, Guangzhou
[3] Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Ürümqi
来源：
Earth Science Frontiers | 2019年 / 26卷 / 05期
关键词：
Geochemistry; Houhe granite; Xiaoshan; Zircon Hf isotope; Zircon U-Pb age;
D O I：
10.13745/j.esf.sf.2019.9.17
中图分类号：
学科分类号：
摘要：
The Houhe granitiod is located in the northern Xiaoshan area, southern North China Craton, intruding into the Archean Taihua Group. It mainly consists of biotite-quartz monzonite and biotite-monzogranite, with LA-ICP-MS zircon U-Pb ages of 127.9±1.4 and 131.0±1.8 Ma, respectively. The geochemical and isotopic data show that the two types of granites are similar geochemically-they are both peraluminous high-K calc-alkaline rocks, having high K2O (K2O/Na2O =1.00-1.51) and Al2O3 (A/CNK=1.12-1.17) and low MgO (Mg#=26-34) contents. They are enriched in Ba, K, U, Th, Pb and light rare earth elements and depleted in high field strength (eg. Nb, Ta and Ti) and heavy rare earth elements, with nearly no Eu anomalies (δEu=0.84-0.97) and high Sr/Y and (La/Yb)N ratios. Isotopic analysis of zircons from the granite yielded εHf(t) value of -17.8 to -9.5 and TDM2(Hf) ages of 2.3-1.7 Ga. In conclusion, the Houhe granite originated primarily from partial melting of thickened continental crust, as tectonic settings transferred from post-collisional to intraplate anorogenic dynamics at the southern margin of the North China Craton. © 2019, Editorial Office of Earth Science Frontiers. All right reserved.
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页码：206 / 221
页数：15
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