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Geoscience ›› 2011, Vol. 25 ›› Issue (4): 712-719.

• igneous petrology • Previous Articles     Next Articles

LA-ICP-MS UPb Age of the Monzonitic Granite from Liangkeshu  Iron Deposit and Its Geological Implications in Altay, Xinjiang

JIANG Liping1, CHAI Fengmei1, YANG Fuquan2, LIU Feng2, ZHANG Zhixin2,  GENG Xinxia2, Lv Shujun3   

  1. 1.College of Geology﹠Prospecting Engineering Program,Xinjiang University,Urumqi, Xinjiang830049,China;
     2.MLR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,
    Beijing100037,China; 3. School of Earth Sciences and Resources, China University of Geosciences, Beijing100083,China
  • Received:2011-04-06 Revised:2011-06-30 Online:2011-08-29 Published:2011-08-31

Abstract:

The Liangkeshu iron deposit in Xinjiang Uygur Autonomous Region is located in the Kelang basin at the south margin of Altay orogenic belt. It occurs in pegmatite dikes found in the contacts between the monzonitic granite pluton and stratum. LAICPMS zircon UPb method yields a (3767±13) Ma age of granite crystallization. This age indicates that the granite is the product of  magmatic activities occurred in late Middle Devonian, meanwhile the age limits that Liangkeshu pegmatite iron deposit formed in late Middle Devonian. The granite has the same tectonic background as the contemporary granite, namely formed in active continental margin environment.

Key words: LA-ICP-MS;monzonitic granite, pegmatite iron deposit, the south margin of Altay;Xinjiang

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