scholarly journals DISCOVERY, DEVELOPMENT AND STUDY OF THE KIROVSKYI GOLD ORE DEPOSIT OF AMUR PROVINCE (AMUR REGION, RUSSIA)

2021 ◽  
pp. 108-116
Author(s):  
VITALY ALEKSEEVICH STEPANOV ◽  
◽  
ANTON VLADIMIROVICH MELNIKOV ◽  
Keyword(s):  
Gold Mineralization ◽  
Isotopic Age ◽  
Ore Deposit ◽  
Gold Ore ◽  
Ore Bodies ◽  
History Of ◽  
Gold Ore Deposit ◽  
Gold Sulfide ◽  
Sr Method ◽  
Gold Bearing

The history of the discovery, development and study of the Kirovskyi gold ore deposit in the Priamur gold-bearing province is considered. The deposit is attributed to the gold-bismuth type of vein deposits of the gold-sulfide-quartz formation. Gold mineralization is genetically related to the formation of the Dzhalinda intrusion of Early Cretaceous granitoids or a series of later dikes of «variegated» composition. The isotopic age of gold mineralization, determined by the Rb-Sr method, is in the fork 131-126 Ma. Further prospects of the deposit are associated with the search for large-volume deposits with stockwork type ore bodies.

scholarly journals HISTORY OF DISCOVERY AND STUDY OF «ZOLOTAYA GORA» DEPOSIT OF PRIAMUR GOLD-BEARING PROVINCE (AMUR REGION, RUSSIA)

2021 ◽  
pp. 87-95
Author(s):  
ANTON VLADIMIROVICH MELNIKOV ◽  
◽  
VITALY ALEKSEEVICH STEPANOV ◽  
Keyword(s):  
Amur Region ◽  
Isotopic Age ◽  
Ore Deposit ◽  
Quartz Veins ◽  
Ore Bodies ◽  
History Of ◽  
Gold Ore Deposit ◽  
Gold Sulfide ◽  
Sr Method ◽  
Gold Bearing

Information about the history of discovery, development and study of the gold ore deposit «Zolotaya Gora» in Priamur gold-bearing province is present. The deposit is represented by six gold-sulfide-quartz veins located in the zone of crumpling and diaphthoresis along the gneisses and crystalline schists of the Archean. Ore bodies intersect with diorite porphirites of the Mesosoic age. The deposit had the richest gold-sulfide-quartz ores in the Amur region with an average gold grade of about 120-140 g/t. The isotopic age of mineralization, determined by Rb-Sr method, is 155±7 million years.

scholarly journals ON THE AGE AND GEODYNAMIC FACTORS OF THE FORMATION OF GOLD MINERALIZATION AT THE MALINOVKA DEPOSIT

2021 ◽  
Vol 40 (3) ◽  
pp. 28-40
Author(s):  
K.N. Dobroshevsky ◽  
◽  
N.A. Goryachev ◽  
◽  
Keyword(s):  
Gold Mineralization ◽  
Structural Features ◽  
Ore Deposits ◽  
Geodynamic Setting ◽  
Ore Deposit ◽  
Gold Ore ◽  
Shear Structures ◽  
Ore Bodies ◽  
Transform Margin ◽  
Gold Ore Deposit

An interpretation of the first obtained Re-Os dating of pyrite and arsenopyrite of the Malinovsky gold ore deposit is given. A comparison of the obtained data and the known dates of the ore-bearing granitoids of the ore field made it possible to determine the age of mineralization at 100-90 Ma. This age corresponds to the time of completion of the Alb-Cenomanian transform margin of Asia continent geodynamic setting with significant left-shear kinematics, as indicated in the article by the structural features of the localization of ore bodies and magmatic bodies. The distribution of gold ore deposits in this time within the Sikhote-Alin orogenic belt and in the shear structures of the south of the Korean Peninsula are noticeably shown.

scholarly journals «PIONEER» GOLD ORE DEPOSIT: HISTORY OF DISCOVERY, GEOLOGICAL STRUCTURE AND ORE COMPOSITION

2020 ◽  
pp. 58-63
Author(s):  
VITALY ALEKSEEVICH STEPANOV ◽  
Keyword(s):  
Gold Deposit ◽  
Late Jurassic ◽  
Geological Structure ◽  
Sulfide Mineralization ◽  
Ore Deposit ◽  
Terrigenous Rocks ◽  
Ore Bodies ◽  
History Of ◽  
Gold Ore Deposit ◽  
Gold Sulfide

Brief information about the history of the discovery of the large Pioner gold deposit in the Amur province is given. The main features of the geological structure of the deposit, located at the contact of the multiphase granitoid intrusion of the Early Cretaceous age and terrigenous rocks of the Middle-Late Jurassic, are shown. Ore bodies are linear stockworks of silicified and carbonated rocks with gold sulfide mineralization. Gold is both free in the form of large, small and micron-sized particles, and in bound form in pyrite. In common ores, its fineness ranges from 650 to 880 units, in rich ores it rises to 870 - 915‰.

scholarly journals DISCOVERY AND STUDY HISTORY POKROVSKY GOLD ORE DEPOSIT IN THE AMUR REGION

2020 ◽  
pp. 63-72
Author(s):  
ANTON VLADIMIROVICH MELNIKOV ◽  
◽  
VITALY ALEKSEEVICH STEPANOV ◽  
DMITRIY VALERYEVICH YUSUPOV ◽  
◽  
...  
Keyword(s):  
Native Gold ◽  
Amur Region ◽  
Near Surface ◽  
Ore Deposit ◽  
Gold Ore ◽  
Gold Silver ◽  
History Of ◽  
Typical Composition ◽  
Gold Ore Deposit

A brief history of the discovery and study of the large Pokrovsky gold ore deposit of the Amur Region, from the ores of which about 63 tons of gold were extracted, is given. The role of scientific and production organizations and individual geologists in the discovery of the deposit is shown. According to the results of almost half a century of research, the deposit is classified as a near-surface gold-silver formation with a typical composition of ores, near-ore metasomatites and native gold for deposits of this type. The closest analogue of Pokrovka is the Kubak deposit of the Omolonsky gold-silver province.

scholarly journals DEPENDENCE OF QUALITATIVE AND QUANTITATIVE INDICATORS OF ORE RESERVES ON THE MAXIMUM PERMISSIBLE INTERVAL OF UNCONDITIONAL ORES OF THE SOTK GOLD ORE DEPOSIT

2021 ◽  
pp. 106-115
Keyword(s):  
Bulk Density ◽  
Spatial Location ◽  
Gold Content ◽  
Ore Deposit ◽  
Gold Ore ◽  
Content Ratio ◽  
Ore Bodies ◽  
Gold Ore Deposit ◽  
Host Rocks ◽  
Enclosing Rocks

At the Sotk gold ore deposit, the following morphological types of ore bodies can be distinguished: vein zones; veins and vein-like bodies; mineralized dykes and a vein zone in gabbro - massifs. The deposit is characterized by rather difficult mining and technical conditions. The enclosing rocks of the near-ore bodies have undergone intense hydrothermal changes at a distance of 5,0...10,0 m to 50,0 m, as a result of which, within the boundaries of these zones, the enclosing rocks have lost their strength and stability. The stability of the host rocks is also greatly influenced by postore tectonic faults, which are widespread in the field. The ore is also volatile. The strength factor of ore and host rocks varies from 3 to 20, with a predominance of 8...13. Hydrothermally altered metasomatites, which make up the mineralized zones, are prone to caking. The ore loosening factor is 1,25...1,40. The average bulk density of ore is 2,6 t / m3, and the bulk density of the host rocks is 2,3... 3,2 t / m3. At the deposit, conditioned and substandard intervals alternate with each other and there is no clearly expressed regularity of their spatial location, which predetermines the use of the ore-bearing factor when calculating ore reserves. The ore content ratio is determined by the ratio of the amount of conditioned ores to the total amount of ore mass, and the amount of conditioned ores is determined using the condition parameter “maximum - allowable range of substandard ores or waste rocks” included in the reserve calculation. For the Sotk gold ore deposit, the regularities of changes in ore reserves in the subsoil, the gold content in the ore massif and the ore content factor from the “maximum allowable to an increase in ore reserves in the subsoil and the ore content ratio with a decrease in the gold content in the ore massif and vice versa are revealed.

scholarly journals Mineralogy of the Drazhnoye gold ore deposit, the Republic of Sakha (Yakutia)

2019 ◽  
pp. 57-63
Author(s):  
V. Yu. Chikatueva ◽  
S. A. Sitkevich
Keyword(s):  
Native Gold ◽  
Hydrothermal Solutions ◽  
Mineral Formation ◽  
Ore Deposit ◽  
Gold Ore ◽  
Ore Mineralization ◽  
The Republic ◽  
Deep Source ◽  
Gold Ore Deposit ◽  
Gold Bearing

New data on the mineral composition of the Drazhnoye gold deposit, located within the Taryn ore field, have been presented. The samples from the central and flank areas of the deposit, which characterize ore and barren zones, have been studied. Based on the detailed studies of the interrelationship and the form of mineral exhalations and their aggregates, the stages of mineral formation have been proposed, including two main stages: sediment-diagenetic and hydrothermal-metasomatic. It has been revealed that the main precipitator of early native gold was pyrrhotite, which later, with an increase in fugacity of sulfur, was almost replaced by later pyrite. At the end of hydrothermalmetasomatic stage, native gold is formed from gold-bearing solutions and is located often in quartz and quartzcarbonate veinlets as independent precipitates, less commonly associated with polymetallic minerals, pyrite and arsenopyrite. Previous researchers of the Drazhnoye deposit established its genetic relationship with hydrothermal solutions. The data obtained confirm this. According to the type of gold ore mineralization and the type of prospective deep source of solution, this field is previously attributed to a hydrothermal pluton-related gold — quartz formation.

scholarly journals U AND TH IN METASOMATITE OF POKROVKA GOLD DEPOSIT (THE AMUR REGION)

2020 ◽  
pp. 80-84
Author(s):  
NATALIA VALENTINOVNA MOISEENKO ◽  
Keyword(s):  
Rare Earth ◽  
Correlation Analysis ◽  
Gold Deposit ◽  
Negative Correlation ◽  
Amur Region ◽  
Radioactive Elements ◽  
Ore Deposit ◽  
Gold Ore ◽  
Gold Ore Deposit ◽  
Gold Bearing

Data on the content of radioactive elements in the metasomatites of the Pokrovskoe gold ore deposit were obtained. It was found that U and Th are scattered in gold-bearing metasomatites. According to the results of the correlation analysis, a positive and negative correlation of U and Th with rare, rare-earth and ore elements in the metasomatites of the deposit was established.

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