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Gold Science and Technology ›› 2014, Vol. 22 ›› Issue (3): 23-29.doi: 10.11872/j.issn.1005-2518.2014.03.023

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LA-ICP-MS Zircon，U-Pb Age and Geochemical Characteristics of Quartz Monzonite of Shouwangfen Copper Mine in North Hebei Province

ZHANG Yunqiang，CHEN Haiyan，LIU Yinglong，ZHANG Liguo，ZHANG Jianzhen，DONG Hongkai，LIU Guang， LIU Silin   

  1. Hebei Institute of Regional Geological and Mineral Resource Survey，Langfang   065000，Hebei，China
  • Received:2014-02-21 Revised:2014-04-17 Published:2014-11-04

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Abstract:

The Shouwangfen composite pluton presented the Mesozoic complex massif that was ore surrounding rock，which had close relationship with mineralization.In this study，petrography，lithogeochemistry，zircon genetic mineralogy，U-Pb chronology of uartz monzonite，lithogenesis and source region were all analyzed. Chronology results demonstrated that the 206Pb/238U weighted average age of magmatic zircon was（133.48±0.53）Ma（MSWD=0.70），and the era was the Early Cretaceous Epoch in the study area；lithogeochemistry results showed that the quartz monzonite was with the characteristic of low K2O/Na2O（0.74~0.89），low P（P2O5=0.09%~0.40%），higher A/CNK（1.24~1.38）and it belonged to the alkali peraluminous rock.Moreover，rare earth element content is higher （262.14×10-6~279.83×10-6） with enrichment of light rare earth，∑LREE/∑HREE=12.12～17.41，and the partition curve tended to the right gently.The abnormal of Eu and Ce was not obvious（δEu=0.83～1.26，δCe=0.78～0.93），which was similar to the characteristic of rare earth element in upper crust，and it was a kind of typical crust source genetic types.Therefore，after comprehensive analysis，the coupling relationship between mineralogenetic epoch and geochemical characteristics，magmatic emplacement age of quartz monzonite should represent the regional response of large-scale magmatic evolution and mineralization during Mesozoic in the east of north China.

Key words: quartz monzonite, zircon U-Pb dating, crustal source cause, rare earth element, mineralization

CLC Number: 

  • P618.51

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