Mineral composition of Paleoproterozoic metamorphosed massive sulfide ore in the Kola Region (a case study of the Bragino Occurrence, South Pechenga)

Kompanchenko, Alena Arkadievna; Аркадьевна, Компанченко Алёна; Voloshin, A. V.; Васильевич, Волошин Анатолий; Bazai, Ayya V.; Валериевна, Базай Айя

doi:10.30695/zrmo/2019.1485.04

Cited by 2 publications

(5 citation statements)

References 9 publications

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“…In the oxidation zone, pyrrhotite is replaced by a pyrite-marcasite intergrowth with "bird's eye" structure (up to 18 % of this ore) (3 in Figure 2a-c). The mineral composition of this ore type is rather poor, 2 % is accessory minerals: chalcopyrite, galena, molybdenite, coulsonite, Vbearing phlogopite and clinochlore intergrowth, Sc-V-bearing senaite, and W-V-bearing rutile [23].…”

Section: Resultsmentioning

confidence: 93%

“…Pyrite contains a lot of inclusions of individual minerals (sulfides, oxides, quartz, etc.) and a mineral association observed only in these pyrite ores [23]. The morphology of coulsonite-III is extremely diverse.…”

Section: Coulsonite-iiimentioning

confidence: 91%

“…It was found in massive pyrrhotite ores of type II and massive pyrite ores. Massive pyrrhotite ores of type II differ from the type I by a strong cracking, presence of relics of quartz-albite veins, hexagonal pyrrhotite predominance (Figure 6a,b), and more diversified mineral composition [23]. The major minerals of this ore type are pyrrhotite, chalcopyrite, sphalerite, pyrite, and marcasite.…”

Section: Coulsonite-iiimentioning

confidence: 97%

“…A detailed description of the geological setting was given in [23], therefore in this work only brief overview is presented.…”

Section: Geological Settingmentioning

confidence: 99%

“…Massive ores are the most common. This ore type can be divided into three subtypes based on their mineralogical composition: massive pyrrhotite ores of type I (mPo-I), massive pyrrhotite ores of the type II (mPo-II), and massive pyrite ores [23]. These ore types will be considered below.…”

Section: Geological Settingmentioning

confidence: 99%

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Coulsonite FeV2O4—A Rare Vanadium Spinel Group Mineral in Metamorphosed Massive Sulfide Ores of the Kola Region, Russia

Kompanchenko

2020

Minerals

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This work presents new data on a rare vanadium spinel group mineral, i.e., coulsonite FeV2O4 established in massive sulfide ores of the Bragino occurrence in the Kola region, Russia. Coulsonite in massive sulfide ores of the Bragino occurrence is one of the most common vanadium minerals. Three varieties of coulsonite were established based on its chemical composition, some physical properties, and mineral association: coulsonite-I, coulsonite-II, and coulsonite-III. Coulsonite-I forms octahedral crystal clusters of up to 500 µm, and has a uniformly high content of Cr2O3 (20–30 wt.%), ZnO (up to 4.5 wt.%), and MnO (2.8 wt.%), high microhardness (743 kg/mm2) and coefficient of reflection. Coulsonite-II was found in relics of quartz–albite veins in association with other vanadium minerals. Its features are a thin tabular shape and enrichment in TiO2 of up to 18 wt.%. Coulsonite-III is the most common variety in massive sulfide ores of the Bragino occurrence. Coulsonite-III forms octahedral crystals of up to 150 µm, crystal clusters, and intergrowths with V-bearing ilmenite, W-V-bearing rutile, Sc-V-bearing senaite, etc. Chemical composition of coulsonite-III is characterized by wide variation of the major compounds—Fe, V, Cr. In some crystals of coulsonite-III, relics of chromite are observed. The microhardness of coulsonite-III is 577 kg/mm2, the reflection coefficient changes in relation to iron, vanadium, and chromium content.

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Section: Resultsmentioning

confidence: 93%

Section: Coulsonite-iiimentioning

confidence: 91%

Section: Coulsonite-iiimentioning

confidence: 97%

“…A detailed description of the geological setting was given in [23], therefore in this work only brief overview is presented.…”

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

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Coulsonite FeV2O4—A Rare Vanadium Spinel Group Mineral in Metamorphosed Massive Sulfide Ores of the Kola Region, Russia

Kompanchenko

2020

Minerals

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Study of the composition of glasses produced at the Zhabinsky factory in the first third of the 18<sup>th</sup> century

Дроздов

Andreev

Ratnikov³

2022

Zavod. lab., Diagn. mater.

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The results of studying the composition of glasses from the site of the Zhabinsky factory, one of the first Russian glass factories founded in the north-west of Russia, are presented. More than 200 samples of historical glass fragments of dishes, as well as the remains of glass on the walls of melting pots were studied using X-ray fluorescence analysis. The data obtained made it possible to classify glasses depending on the recipe and the raw materials used in their production. The reliability of the determination of the compositions was confirmed on randomly selected samples by the ICP AES method. The presence of cobalt impurities was qualitatively determined from the characteristic bands in the absorption spectra of the visible region. The main group of finds is represented by potash-calcium glass obtained using plant ash (ash glass) or purified potash (potash glass). A separate group includes potash-lime glasses obtained through addition of lime to the batch. The nature of the coloration of the studied glasses with iron (+2), iron (+3), cobalt (+2), and also due to the charge transfer iron (+3) — sulfur (–2) is discussed. Potassium-lead glasses with a high lead content found at the site of the plant serve as an example of the first Russian colorless lead crystal. The results represent the first systematic study of the composition of glass produced in Russia in the time of Peter the Great. A comparative analysis of the compositions of glasses from the Zhabinsky and Lavinsky factories has been carried out.

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Mineral composition of Paleoproterozoic metamorphosed massive sulfide ore in the Kola Region (a case study of the Bragino Occurrence, South Pechenga)

Cited by 2 publications

References 9 publications

Coulsonite FeV2O4—A Rare Vanadium Spinel Group Mineral in Metamorphosed Massive Sulfide Ores of the Kola Region, Russia

Coulsonite FeV2O4—A Rare Vanadium Spinel Group Mineral in Metamorphosed Massive Sulfide Ores of the Kola Region, Russia

Study of the composition of glasses produced at the Zhabinsky factory in the first third of the 18<sup>th</sup> century

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