TY - JOUR

T1 - Типы руд золотосеребряных месторождений вулкано-плутонических комплексов складчатых поясов и методологические аспекты их выделения

AU - Подолян, Евгения Игоревна

AU - Котова, Ирина Клавдиевна

AU - Шелухина, Юлия Сергеевна

AU - Бороздин, Алексей Павлович

PY - 2022/1

Y1 - 2022/1

N2 - The study covers the ores of the three gold-silver type deposits, namely, Lichkvaz-Tei (Armenia), Nevenrekan and Perevalnoe (Rus-sia). These differ in both geological structure and ore localization conditions. Detailed mineralogical studies of these ores were conducted to establish their natural types. The material composition for the ore types, their structural and textural features, the mineral bal-ance of valuable components, and the grain-size composition of their constituent minerals may be used to predict the processing properties of ores at early exploration stages. Along with the traditional ap-proaches, the method of sample pre-classification by factor analysis based on geochemical associations of ore-forming elements was tested. This enabled the development of an algorithm for identifying certain types in each sample and, consequently, the preparation of composite samples for further mineralogical studies. With due account of the geochemical associations, four ore-geochemical types of ores were identified for the Lichkvaz-Tei deposit based on the statistical analysis. These are the gold-arsenide, gold-copper-base metal, copper-zinc, and gold-silver arsenide-antimonide-sulfide types. For all the objects studied, a general ore-mineral parageneses formation sequence has been established: the early pyrite type is re-placed by arsenopyrite-pyrite and chalcopyrite-sphalerite types, then by intermediate gold-chalcopyrite-galena-fahlite silver-bearing and late gold-silver-sulfosaline-fahlite and marcasite types. A wide range of natural types of ores have been established, such as: pyrite-ar-senopyrite, gold-arsenopyrite, gold-galena-sphalerite, chalcopyrite-sphalerite types for the Lichkvaz-Tei deposit; gold-pyrite-sulfosaline and oxidized gold-pyrite types for the Nevenrekan mineral occur-rence; silver-fahlite-chalcopyrite-galena-sphalerite type for the Per-evalnoe deposit. This diversity is due to the different quantitative ra-tios of ore-mineral parageneses in the composition of the ores.

AB - The study covers the ores of the three gold-silver type deposits, namely, Lichkvaz-Tei (Armenia), Nevenrekan and Perevalnoe (Rus-sia). These differ in both geological structure and ore localization conditions. Detailed mineralogical studies of these ores were conducted to establish their natural types. The material composition for the ore types, their structural and textural features, the mineral bal-ance of valuable components, and the grain-size composition of their constituent minerals may be used to predict the processing properties of ores at early exploration stages. Along with the traditional ap-proaches, the method of sample pre-classification by factor analysis based on geochemical associations of ore-forming elements was tested. This enabled the development of an algorithm for identifying certain types in each sample and, consequently, the preparation of composite samples for further mineralogical studies. With due account of the geochemical associations, four ore-geochemical types of ores were identified for the Lichkvaz-Tei deposit based on the statistical analysis. These are the gold-arsenide, gold-copper-base metal, copper-zinc, and gold-silver arsenide-antimonide-sulfide types. For all the objects studied, a general ore-mineral parageneses formation sequence has been established: the early pyrite type is re-placed by arsenopyrite-pyrite and chalcopyrite-sphalerite types, then by intermediate gold-chalcopyrite-galena-fahlite silver-bearing and late gold-silver-sulfosaline-fahlite and marcasite types. A wide range of natural types of ores have been established, such as: pyrite-ar-senopyrite, gold-arsenopyrite, gold-galena-sphalerite, chalcopyrite-sphalerite types for the Lichkvaz-Tei deposit; gold-pyrite-sulfosaline and oxidized gold-pyrite types for the Nevenrekan mineral occur-rence; silver-fahlite-chalcopyrite-galena-sphalerite type for the Per-evalnoe deposit. This diversity is due to the different quantitative ra-tios of ore-mineral parageneses in the composition of the ores.

KW - geometallurgy

KW - gold

KW - gold-silver ores

KW - mineralogy

KW - natural ore type

KW - ore types

KW - paragenetic associations

KW - polymetallic ores

KW - statistics

UR - https://www.rudmet.ru/journal/2090/article/34933/

UR - http://www.scopus.com/inward/record.url?scp=85127235970&partnerID=8YFLogxK

U2 - 10.17580/or.2022.01.06

DO - 10.17580/or.2022.01.06

M3 - статья

VL - 2022

SP - 31

EP - 40

JO - ОБОГАЩЕНИЕ РУД

JF - ОБОГАЩЕНИЕ РУД

SN - 0202-3776

IS - 1

ER -