Unveiling the Secrets of the Maodeng Mo-Bi-Sn-Cu Deposit in China's Great Xing'an Range

Strategic Insights -

Research has shed new light on the geological composition of the Maodeng Mo-Bi-Sn-Cu deposit in China's Great Xing'an Range, revealing the presence of porphyritic monzogranite, granite porphyry, and alkali feldspar granite. The study, conducted by a team of researchers from Inner Mongolia University of Technology, aimed to uncover the petrogenetic relationships among different lithologies in the Alubaogeshan complex. The findings provide valuable insights into the magmatic evolution of the deposit and its potential for mineralization.

Key Takeaways:

  • The Maodeng Mo-Bi-Sn-Cu deposit in China's Great Xing'an Range consists of porphyritic monzogranite, granite porphyry, and alkali feldspar granite.
  • The ore-associated Alubaogeshan complex has been identified, which consists of PMG, GP, and AFG.
  • The biotites in the Alubaogeshan complex have a magmatic origin and exhibit a diverse array of compositions, spanning from lepidomelane to protolithionite-zinnwaldite.
  • The total aluminum content and the Fe/(Fe + Mg) values in biotites rise gradually from PMG to GP and then to AFG, indicating a progressive degree of magmatic evolution.
  • The trend of increasing magmatic differentiation from PMG to AFG is manifested by the decline in K/Rb and Nb/Ta ratios and the increase in contents of Rb, Cs, Sn, W, and Li in biotites.
  • The highly fractional crystallization, intense exsolution of Cl-bearing fluid, and enrichment of the F element in the ore-related granite may exert a crucial role in mineralization in the Maodeng deposit.

Statistics:

  • The Maodeng Mo-Bi-Sn-Cu deposit lies in the southern part of the Great Xing'an Range.
  • The study involved a team of researchers from Inner Mongolia University of Technology, including Xiang-Guo Guo, Gen-Yuan Ji, Si-Hong Jiang, Peng-Cheng Yan, Lin-Jun Chen, and Si-Zi Li.
  • The research was supported by the Deep Earth Probe and Mineral Resources Exploration-National Science and Technology Major Project, China.
  • The study was published in Ore Geology Reviews, 2025; 184.

Sources:

  • Geochemical Characteristics and Their Implications On Mineralization of Biotite From the Maodeng Mo-bi-sn-cu Deposit, Southern Great Xing'an Range, China. Ore Geology Reviews, 2025; 184.
  • NewsRx. Investigators at Inner Mongolia University of Technology Report Findings in Ore Geology (Geochemical Characteristics and Their Implications On Mineralization of Biotite From the Maodeng Mo-bi-sn-cu Deposit, Southern Great Xing'an Range, China). China Weekly News. September 2, 2025; p 195.