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Gold Science and Technology ›› 2014, Vol. 22 ›› Issue (2): 17-23.doi: 10.3969/j.issn.1005-2518.2014.02.017

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Geochemical Characteristics of Ore-bearing Rocks in Longtoushan Gold Deposit,Guangxi Province

ZHANG Chunpeng1,ZENG Nanshi2   

  1. 1.Shenyang Institute of Geology and Mineral Resources,Shenyang   110034,Liaoning,China;
    2.College of Earth Sciences,Guilin University of Technology,Guilin   541004,Guangxi,China
  • Received:2013-11-20 Revised:2014-02-17 Online:2014-04-28 Published:2014-08-26

Abstract:

Longtoushan gold deposit occurs in a late Mesozoic residual volcanic neck.The characteristics of Mesozoic volcanic-subvolcanic rocks,such as their types,space distributions and petrology etc.have been analyzed.The data of petrography and geochemistry shows that the SiO2 contents range from 62.77% to 75.24%, the La/Ce and Rb/Ti ratios are basically not changed.The right dipping of REE partitioning curves shows rich in light rare earth elements,and Europium loses a lot.These rocks are formed mainly by rhyodacitic magma,and indicate that they might result from the same magma chamber.The division of trace elements reflect that formation of the volcanic-subvolcanic rocks has a tectonic background of VGA-Syn-COLD type.The genetic series of these granitic rocks may belong to that of mixed crust-mantle derivation.

Key words: volcanic-subvolcanic rock, petrology, tectonic environment, metallogenic rock body, Longtoushan gold deposit, Guangxi Province

CLC Number: 

  • P618.51

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