Structure and composition of picritic gabbro-dolerites of the Оctyabrskoye deposit central part

2021 ◽  
pp. 39-47
Author(s):  
Maria Nesterenko
Keyword(s):  
Sulfide Minerals ◽  
Actual Process ◽  
Formation Model ◽  
Magmatic System ◽  
Deposit Formation ◽  
Ore Formation ◽  
Structural Patterns ◽  
Formation Conditions

Issues relating to the genesis and deposit formation conditions in the Norilsk region are still debatable. At present, ore formation model in an open magmatic system is most popular. To study the actual process, the structure and composition of sulfide minerals in the Oktyabrskoye deposit central part were examined in two boreholes, RT-30 and RT-107, that reveal orebodies C-3 and C-4, respectively. Particular attention was paid to the structural patterns of disseminated ores in picritic gabbro-dolerites horizon. It has been established that sulfide inclusions are missing in the upper part of the horizon and their size and quantity gradually increase in depth, so that these inclusions grade into sulfide streaks in the lower part of the horizon. This indicates gravitational sulfide deposition in a closed magmatic system.

scholarly journals PHYSICAL-CHEMICAL FORMATION CONDITIONS OF URANIUM-TITANIUM-METAGEL MINERALIZATION AT THE GOLD-URANIUM ELKON DEPOSIT

2017 ◽  
pp. 52-57 ◽  
Author(s):  
M. M. Komarova ◽  
VL. B. Komarov ◽  
A. P. Aleshin ◽  
T. L. Krylova
Keyword(s):  
Crystalline Form ◽  
Fluid Regime ◽  
Ore Formation ◽  
Physical Chemical ◽  
Wide Range ◽  
Moderate Salinity ◽  
Formation Conditions ◽  
Carbonate Composition ◽  
Main Factor

A wide range of the temperatures of hydrothermal fluid regime (430-103 °C) has been revealed in the result of microthermometric study of the fluid inclusions in the minerals of pre-ore and post-ore stages developed at the Elkon deposit. Average temperatures, as well as the temperature variation are similar for both pre-ore and post-ore stages. It allows sure determination of temperatures of uranium ore formation as 400-120 °C. Fluids possessed Na-chloride, rarely Na-chloride-carbonate composition and moderate salinity (6-16 wt. % · NaCl equiv.). The wide range of tem-peratures confirms an assumption made before that various temperatures were the reason of formation of uranium mineralization both in the form of predominantly amorphous phase (U-Ti-metagel), as well as the rarely crystalline form (brannerite). Abrupt temperature decrease was apparently the main factor of the ore precipitation.

The fluid regime of ore formation in the Balei gold-bearing ore-magmatic system (eastern Transbaikalia, Russia)

2010 ◽  
Vol 51 (10) ◽  
pp. 1102-1109 ◽  
Author(s):  
A.M. Spiridonov ◽  
L.D. Zorina ◽  
S.P. Letunov ◽  
V.Yu. Prokof’ev
Keyword(s):  
Magmatic System ◽  
Fluid Regime ◽  
Ore Formation ◽  
Eastern Transbaikalia ◽  
Gold Bearing

LEAD AND ZINC DEPOSIT FORMATION CONDITIONS WITHIN ANGARA-BOLSHEPITSK MINERAGENIC ZONE, YENISEI RIDGE

2020 ◽  
pp. 52-67
Author(s):  
M. N. Zaitseva ◽  
V. V. Kuznetsov ◽  
V. D. Konkin ◽  
T. V. Seravina ◽  
A. V. Inyakin ◽  
...  
Keyword(s):  
Practical Interest ◽  
Yenisei Ridge ◽  
Organic Carbon Content ◽  
Structural Factors ◽  
Ore Formation ◽  
Factors Affecting ◽  
Lead And Zinc ◽  
Formation Conditions ◽  
The Relationship

The paper shows the main characteristics for geological and associated ore formations in the Tungusik formation complex. Ore formation deposit types and ore field types in the region are identified and described. Based on the identified lithofacies, the paleoenvironment of stratiform ore associations formation is characterized. The role of metamorphism and structural factors affecting prospecting conditions are shown. The relationship between the mineral type of ores and organic carbon content in ore-bearing strata for various geological and economic types has been revealed. The obtained and generalized data are of practical interest in designing forecasting/prospecting deposit models and improving prospecting efficiency.

VERTICAL ZONING OF THE COPPER-MOLYBDENUM FORMATION OF THE KUZNETSK ALATAU (KHAKASSIA)

2021 ◽  
pp. 3-11
Author(s):  
V. L. Khomichev ◽  
Keyword(s):  
General Model ◽  
Maximum Concentration ◽  
Deep Structure ◽  
Magmatic System ◽  
Ore Formation ◽  
First Approximation ◽  
Geological Features ◽  
Initial Content ◽  
Vertical Zoning

The previously identified zoning of the copper-molybdenum formation based on a comparison of geological features of the Sorskoye, Ipchulskoye and other deposits, is confirmed by a comparison of their deep structure and general model of the ore-magmatic system. As a result, it was possible to determine the distribution of ore matter and the degree of concentration of fluids and metals in the evolutionary chain in the first approximation: the initial granite melt-leucogranite residual chamber – ore-forming apophyse from the chamber. The maximum concentration in apophyse is 1000–2000 times higher than the initial content in an ordinary granite. This makes it possible to consider the fluidized apophyse melt as “ore magma” responsible for the ore formation.

Textural, Compositional, and Sulfur Isotope Variations of Sulfide Minerals in the Red Dog Zn-Pb-Ag Deposits, Brooks Range, Alaska: Implications for Ore Formation

2004 ◽  
Vol 99 (7) ◽  
pp. 1509-1532 ◽  
Author(s):  
K. D. Kelley ◽  
D. L. Leach ◽  
C. A. Johnson ◽  
J. L. Clark ◽  
M. Fayek ◽  
...  
Keyword(s):  
Sulfur Isotope ◽  
Sulfide Minerals ◽  
Brooks Range ◽  
Ore Formation

Golʼtsovoe Ag–Pb–Zn Deposit (Northeastern Russia): Geological Setting, Mineralogy, Geochemistry, and Ore Formation Conditions

2021 ◽  
Vol 63 (3) ◽  
pp. 185-211
Author(s):  
N. E. Savva ◽  
A. V. Volkov ◽  
N. G. Lyubimtseva ◽  
V. Yu. Prokofiev ◽  
A. A. Sidorov ◽  
...  
Keyword(s):  
Northeastern Russia ◽  
Ore Formation ◽  
Geological Setting ◽  
Formation Conditions
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