Origin of hypergene and technogene minerals in mining technogene systems (a case study of the Dalnegorsk Region, Primorye)

Zvereva V. P., Kostina A. M., Lysenko A. I.

Zapiski RMO (Proceedings of the Russian Mineralogical Society). 2019. V. 148. N 2. P. 50-60

https://doi.org/10.30695/zrmo/2019.1482.03

Full text is available on Journals.eco-vector.com

Language: Russian

Abstract

The paper displays results of modeling the physical-chemical parameters of crystallization for hypergene minerals in mine, slurry and drainage waters within mining technogene systems of sulfide-bearing ore deposits of the Dalnegorsk district. The modeling has been carried out with the software package «Selector». Eh and pH parameters were calculated, thermal conditions of the saturation of hypergenic minerals from solutions were determined, and mineral assemblages have been distinguished. It is shown that hypergenic and technogenic minerals crystallize in the wide range of temperatures (from –25º to +40ºC) with significant variations of Eh (from 0.6 to 1.2 V) and pH (0.3—13.7) values. The principal role in the formation of mineral parageneses belongs to the composition of ores and host rocks. The greater is grade of sulfides in tails of processing, the more acid solutions they are producing, and the greater is the number of newly formed secondary minerals.

Key words: hypergenic and technogenic minerals, tails of processing, physical-chemical modeling, mine, slurry, and drainage waters