广西龙头山金矿床赋矿岩石地球化学特征

doi:10.3969/j.issn.1005-2518.2014.02.017

Abstract

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

ZHANG Chunpeng，ZENG Nanshi. Geochemical Characteristics of Ore-bearing Rocks in Longtoushan Gold Deposit，Guangxi Province[J].Gold Science and Technology, 2014, 22(2): 17-23.

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

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