Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (6): 1683-1695.doi: 10.13278/j.cnki.jjuese.20170336

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Geochronology and Metallogenic Epoch of Shenshan Fe-Cu Deposit in Zhalaite County, Inner Mongolia and Its Geological Significance

Lü Junchao1, Shu Guanglong1, Zhang Debao2, Zhao Yan1, Liu Guixiang1, Bi Zhongwei1   

  1. 1. Shenyang Center of Geological Survey, China Geological Survey, Shenyang 110034, China;
    2. No.6 Institute of Geological Mineral Exploration of Inner Mongolia, Hailar 021008, Inner Mongolia, China
  • Received:2017-12-27 Published:2018-11-26
  • Supported by:
    Supported by Geological Survey Project of China Geological Survey (12120113055600,DD20160047)

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Abstract: The Shenshan Fe-Cu deposit is the only skarn Fe-Cu deposit discovered in the Middle Great Hinggan Mountains, Inner Mongolia. We focused on the geochemistry features and zircon LA-ICP-MS U-Pb chronology of the intrusions related to the mineralization of the deposit. The Yilite intrusion in Shenshan district is of tonalite, potash rich calc-alkali and magnetite series. The tonalite is characterized by peraluminous, enriched in light rare earth elements, large ion lithophile elements, depleted of high field-strength elements. Its Ce anomalies (δCe) are 0.86-0.92 with no Eu anomalies (δEu of 0.97-1.17). The Zircon LA-ICP-MS U-Pb yields a concordant age of (155.3±1.3) Ma, which reveals that the Yilite intrusion formed in Late Jurassic. The results also show that the Shenshan Fe-Cu deposit was mineralized in Late Jurassic. The geochemistry characteristics of the Yilite intrusion reveal a tectonic setting of thicken crust and tectonic activation in Late Jurassic.

Key words: Shenshan Fe-Cu deposit, zircon U-Pb ages, geochemistry, Middle Great Hinggan Mountains

CLC Number: 

  • P618
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