Abstract:

Located in the western part of the Min-Li metallogenic belt in the Western Qinling Mountains, the Mawu gold deposit is a medium carlin-type disseminated gold deposit discovered in recent years. Based on a study of the thermoelectric characteristics of pyrites in No.8 orebody, the authors put forward the following conclusions. The thermoelectric properties of pyrites in No.8 orebody are mainly of the N type, with a total content of 71.2%. The ore-forming temperature of the deposit ranges from 200 to 300 ℃，indicating that the deposit is a medium temperature gold deposit. The thermoelectricity characteristics imply that the lower to middle parts of the orebody have been eroded, and there exists an extension of No.8 orebody in the deep. The frequency of P-type pyrite is reducing, and then increasing and finally decreasing from top to bottom. The high average gold grade corresponds with the high P-type pyrite thermoelectric coefficient value and the high thermoelectric coefficient dispersion value.

Key words: pyrite, thermoelectricity, gold deposit, Mawu, Gansu