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LI Ruojian, CHEN Yuanrong, GU Ruiqi, LI Jiacai, JIANG Xin, NONG Yuejin, WANG Zhanyu, YAN Xiang. 2020. Geochemical characteristics and metallogenic potential of Maoershan granite and its adjacent basement strata in Guangxi[J]. Geology in China, 47(2): 528-537. doi: 10.12029/gc20200218
Citation: LI Ruojian, CHEN Yuanrong, GU Ruiqi, LI Jiacai, JIANG Xin, NONG Yuejin, WANG Zhanyu, YAN Xiang. 2020. Geochemical characteristics and metallogenic potential of Maoershan granite and its adjacent basement strata in Guangxi[J]. Geology in China, 47(2): 528-537. doi: 10.12029/gc20200218
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Geochemical characteristics and metallogenic potential of Maoershan granite and its adjacent basement strata in Guangxi

  • College of Earth Sciences, Guilin University of Technology, Guilin 541006, Guangxi, China

    • Fund Project: Supported by National Science and Technology Support Project (No. 2014BAB05B00) and Engineering Research Center of Exploration for Hidden Non-ferrous and Precious Metal Ore Deposits, Ministry of Education Project (No. 2015GCZX006)
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  • Author Bio: LI Ruojian, male, born in 1992, master candidate, majors in geochemistry; E-mail:469112375@qq.com
  • Corresponding author: CHEN Yuanrong, male, born in 1963, doctor, professor, engages in the study of geochemical exploration; E-mail: chenyremail@163.com 
Received Date:  07 September 2018
Revised Date:  20 September 2019
Publish Date:  25 April 2020
    Abstract

  • Through studying the geochemical characteristics and metallogenic potential of Maoershan granite and its adjacent basement strata, it is found that the granite is characterized by high silicon (SiO2=67.61%-8.316%), rich potassium (K2O=3.75%-6.28%) and iron (FeOT=1.85%-5.38%), depleted sodium (Na2O=0.08%-3.06%), poor magnesium (MgO=0.14%-1.28%), peraluminous nature (the average of A/CNK being 1.49), relatively high total amounts of rare earth elements, and enriched light rare earth elements, with Eu negative anomaly (δEu=0.15-0.46), suggesting that it was formed in the post-orogenic tectonic environment and belonged to strongly peraluminous S-type granite. At the same time, the results show that the element assemblages and hydrocarbon composition of Maoershan granite and its adjacent basement strata had inherited relationship. The granite was mainly derived from the partial melting of the basement strata. W, Sn and Bi had good metallogenic potential. All these data show that the basement strata in this area not only provided a material basis for large-scale magmatic activities but also provided a source of ore-forming materials for further differentiation of granite pulp to form tungsten-tin polymetallic deposits.

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