Earth Science Frontiers ›› 2019, Vol. 26 ›› Issue (5): 206-221.DOI: 10.13745/j.esf.sf.2019.9.17

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

QI Nan,CHEN Yanjing,WANG Pin,WU Yanshuang,XU Chen,ZHAN Enpeng   

  1. 1. Key Laboratory of Orogenic Belt and Crustal Evolution, Peking University, Beijing 100871, China
    2. Key Laboratory of Ocean and Marginal Sea Geology, Chinese Academy of Sciences; South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
    3. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, rümqi 830011, China
  • Received:2019-02-28 Revised:2019-06-25 Online:2019-09-28 Published:2019-09-28
  • Supported by:

Abstract: 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 =1.001.51) and Al2O3 (A/CNK=1.121.17) and low MgO (Mg#=2634) 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=0.840.97) 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 2.31.7 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.


Key words: Houhe granite, Xiaoshan, zircon U-Pb age, zircon Hf isotope, geochemistry

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