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Geoscience ›› 2018, Vol. 32 ›› Issue (01): 66-76.DOI: 10.19657/j.geoscience.1000-8527.2018.01.06

• Ore Deposits and Mineralogy • Previous Articles     Next Articles

Thermoelectricity and Trace Element Characteristics of Pyrites from Tiyier Gold Deposit in West Junggar, Xinjiang and Their Geological Significance

YU Wenlin1(), GE Wensheng2(), LIAO Hua3, HU Weixing2, LU Shudong4, LIU Xu2, LI Lei5, WANG Quanle4   

  1. 1. Jiangxi Station of Geo-environment Monitoring, Nanchang,Jiangxi 330095, China
    2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
    3. Jiangxi College of Applied Technology, Ganzhou,Jiangxi 341000, China
    4. China National Gold Group Co.Ltd., Beijing 100011,China
    5. Tuoli Jinfu Mining Co.Ltd., Tacheng, Xinjiang 834500, China
  • Received:2017-06-25 Revised:2017-09-14 Online:2018-02-10 Published:2018-02-05

Abstract:

Pyrite is the main gold-bearing mineral in Tiyier gold deposit, the typomorphic characteristics of which is of great significance to deep prospecting. In this paper, the thermoelectricity and trace element characteristics of pyrite were systematically studied from the perspective of mineralogy and mineral geochemistry. The results show that the conductivity type of pyrite is mainly P-N hybrid type, and the occurrence rate of P-type pyrite gradually increases from the shallow to the deep part. Combining the vertical change of gold grade of different drilling, it is well known that the occurrence rate of P-type pyrite is positively correlated with the high gold grade. Moreover, the occurrence rate of P-type pyrite is consistent with the direction of lateral volts of orebody, which indicates that the ore body has some extension to the deep part. The ore-forming temperatures range from 100 to 330 ℃, which belong to epithermal deposit. The vertical projection contours of trace elements (As+Sb+Se+Te, Cu+Pb+Zn and Ti+Ni+Co+Cr) from pyrite show that the great prospecting potential existed under -250 m elevation between exploration line 1 and line 2 to northwest. Given the above, the typomorphic characteristics of the pyrite are significant for deep gold prospecting in the Tiyier gold deposit.

Key words: pyrite, thermoelectricity, trace element, Tiyier gold deposit, West Junggar

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