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Geoscience ›› 2019, Vol. 33 ›› Issue (03): 476-486.DOI: 10.19657/j.geoscience.1000-8527.2019.03.02

• Ore Deposits and Petrology • Previous Articles     Next Articles

Formation Environment and Genesis of the Lifang Barite Deposit in Fujian Province

LUO Kun(), LI Dungpeng(), WANG Liyuan, XIAO Aifang, KONG Lingtian, WANG Zhiqi   

  1. Zijin Mining College, Fuzhou University, Fuzhou,Fujian 350108, China
  • Received:2018-10-15 Revised:2019-03-11 Online:2019-06-23 Published:2019-06-24
  • Contact: LI Dungpeng

Abstract:

For the purpose of understanding the genesis of the Lifang barite deposit in Fujian Province and the source of its metallogenic materials, this thesis has conducted a study on the main elements, rare earth elements, trace elements and sulfur isotope of the barite single mineral in the deposit. The results indicate that the barite single mineral is characterized by rich Al2O3, SiO2 and TFe2O3, relatively low ΣREE with rich LREE, a positive δEu anomaly and a negative δCe anomaly, and rich Ba, Rb ,Nb, Th, P and deficient K and Zr. The average of all midpiece δ34S is greater than 32.6‰, and only one main peak is displayed in the histogram. The genetic diagram of the barite single mineral, ΣREE-La/Yb respectively indicate barite single mineral form from hydrothermal sedimentation and sedimentary rocks contributing to most of its barium content. The ratios of SiO2/Al2O3, MnO/TFe2O3, U/Th, etc.indicate alkalescent-alkaline oxidizing environment. The ratios of (La/Ce)N, Al/(Al+Fe), etc. indicate continental margin environment. This thesis concludes that the Lifang barite deposit was formed by hydrothermal sedimentation in a continental margin environment with sedimentary rocks contributing to most of its barium content and Cambrian seawater being the major source of sulfur; this formation process is accompanied by a relatively large terrigenous input.

Key words: barite single mineral, geochemistry, hydrothermal sedimentation, origin of metallogenic material, tectonic setting

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