scholarly journals Determination of work index of Filin Kokuwa Gold Deposit in Toro Local Government, Bauchi State Nigeria

2021 ◽  
Vol 40 (3) ◽  
pp. 387-392
Author(s):  
D.M. Bwala ◽  
F. Abdulfattah ◽  
O.O. Alabi ◽  
B.O. Adewuyi
Keyword(s):  
Ball Mill ◽  
Reference Sample ◽  
Milling Machine ◽  
Ore Deposit ◽  
Gold Ore ◽  
Sieve Size ◽  
Work Index ◽  
Gold Ore Deposit ◽  
Reference Samples

This report shows the work index of Filin Kokuwa Gold ore sample in Bauchi State, Nigeria. The “reference sample (granites)” were sourced from outcrops of granites around Toro town. The samples were crushed, ground, and pulverized using appropriate laboratory milling machine. 80% passing size for the gold ore and granites samples were obtained at 100μm sieve size for the ball mill feeds and products respectively. The work indexes of reference samples i.e. granites were used to calculate the work index of the Filin Kokuwa gold ore sample. The values of 13.277kWh/ton and 15.192kWh/ton were obtained respectively for the two different reference granites samples used and 14.21kWh/ton as their average which is the value of the work index of the Filin Kokuwa gold ore deposit. The energy required for grinding the ore was found to be 3.581kW.

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 40AR/39AR age of the Albyn gold ore deposit (eastern part of the Mongol-Okhotsk fold belt)

2019 ◽  
Vol 485 (4) ◽  
pp. 468-473
Author(s):  
A. Yu. Kadashnikova ◽  
А. А. Sorokin ◽  
A. V. Ponomarchuk ◽  
А. V. Travin ◽  
V. А. Ponomarchuk ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Fold Belt ◽  
Eastern Asia ◽  
Ore Deposit ◽  
Gold Ore ◽  
Gold Ore Deposit

It was established that the age of hydrothermal metasomatites of the Albyn gold deposit, one of the most famous in eastern Asia, can be estimated at 135-131 Ma. It is assumed that the formation of this deposit is associated with dislocations and metamorphism of volcanogenic-sedimentary strata of the Mongol-Okhotsk belt.

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.

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