scholarly journals New insights on the structural and geological setting of the world-class Musselwhite gold deposit, Superior Province, northwestern Ontario

2014 ◽  
Author(s):  
W Oswald ◽  
B Dubé ◽  
S Castonguay ◽  
V McNicoll ◽  
J Biczok ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Superior Province ◽  
Geological Setting ◽  
Northwestern Ontario ◽  
The World ◽  
World Class

The world-class Natalka gold deposit, northeast Russia: REE patterns, fluid inclusions, stable oxygen isotopes, and formation conditions of ore

2008 ◽  
Vol 50 (5) ◽  
pp. 362-390 ◽  
Author(s):  
N. A. Goryachev ◽  
O. V. Vikent’eva ◽  
N. S. Bortnikov ◽  
V. Yu. Prokof’ev ◽  
V. A. Alpatov ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Oxygen Isotopes ◽  
Fluid Inclusions ◽  
Stable Oxygen Isotopes ◽  
Northeast Russia ◽  
The World ◽  
World Class ◽  
Stable Oxygen ◽  
Formation Conditions ◽  
Ree Patterns

scholarly journals Geology of the world-class Kiaka polyphase gold deposit, West African Craton, Burkina Faso

2017 ◽  
Vol 126 ◽  
pp. 96-122 ◽  
Author(s):  
Arnaud Fontaine ◽  
Aurélien Eglinger ◽  
Koumangdiwè Ada ◽  
Anne-Sylvie André-Mayer ◽  
Laurie Reisberg ◽  
...  
Keyword(s):  
Burkina Faso ◽  
Gold Deposit ◽  
West African ◽  
West African Craton ◽  
The World ◽  
World Class

scholarly journals Mineralizing Events of the World-Class Volta Grande Gold Deposit, Southeastern Amazonian Craton, Brazil

2021 ◽  
Vol 6 (1) ◽  
pp. 19
Author(s):  
Hugo Paiva Tavares de Souza ◽  
Carlos Marcello Dias Fernandes ◽  
Ricardo de Freitas Lopes ◽  
Stéphane Amireault ◽  
Marcelo Lacerda Vasquez
Keyword(s):  
Gold Deposit ◽  
Native Gold ◽  
Gold Deposits ◽  
Quartz Veins ◽  
The World ◽  
Intrusive Rocks ◽  
Amazonian Craton ◽  
World Class ◽  
High Level ◽  
Southeastern Region

The southeastern region of the Amazonian Craton has been the target of several metallogenetic surveys, which recently led to the identification of the world-class Volta Grande gold deposit with gold reserves of ~3.8 Moz at 1.02 g/t. This deposit is located ~60 km southeast of Altamira city, Pará state, and is hosted by the Três Palmeiras intrusive greenstone belt that is located in the northern Bacajá tectonic domain (2.24–2.0 Ga). The mineralization is hosted by a high-level intrusive and mylonitized suite. Local kinematic indicators suggest dip-slip movement in which the greenstone moves up relative to the intrusive rocks. Native gold mostly occurs as isolated grains in centimeter-wide quartz veins and veinlets associated with pervasive carbonate alteration that was synchronous with dynamic metamorphism. Part of the gold is also associated with disseminated sulfides in this generally low-sulfide mineralization. These relationships are compatible with orogenic lode-type gold systems elsewhere. New petrographic studies from core samples along a stratigraphic profile reveal the presence of lava flows and dykes of rhyodacite, rhyolite, and plutonic rocks such as quartz monzonite, granodiorite, monzodiorite, and subordinate microgranite crosscutting an earlier style of mineralization. These rocks are characterized by potassic, propylitic, intermediate argillic, and/or carbonate hydrothermal alterations in selective, pervasive, or fracture-controlled styles. Within the hydrothermal volcano-plutonic sequence, gold occurs as disseminated isolated grains or replacing sulfides. Both native gold and sulfides are also present in centimetric quartz veinlets. Such features of the deposit are similar to those from porphyry-type and low- to intermediate-sulfidation epithermal systems already identified in the Amazonian Craton. The Volta Grande deposit data suggest a second mineralizing event, common in large-tonnage gold deposits, and can represent a new exploration guide.

scholarly journals New Constraints on the Main Mineralization Event Inferred from the Latest Discoveries in the Bor Metallogenetic Zone (BMZ, East Serbia)

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 672
Author(s):  
Banješević ◽  
Cvetković ◽  
von Quadt ◽  
Ljubović Obradović ◽  
Vasić ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Fractional Crystallization ◽  
Parental Magma ◽  
Simplified Model ◽  
The South ◽  
Epithermal Mineralization ◽  
The World ◽  
Phase 1B ◽  
World Class

This study aims at better constraining the link between magmatism and metallogeny in the south-easternmost sector of the Bor Metallogenetic Zone (BMZ), where the world-class copper and gold deposit of Čukaru Peki was recently discovered. The obtained U/Pb zircon ages confirm the earlier knowledge that the major Cu–Au porphyry and epithermal mineralization in the BMZ is genetically related to the first volcanic phase (‘Timok andesite’; 85–90 Ma). However, the data also suggest that during this phase, two subgroups of andesite porphyry were formed; they are named volcanic phase 1A (V1A) and volcanic phase 1B (V1B). The V1A andesite (89–90 Ma) is plagioclase-hornblende phyric, holocrystalline and ubiquitously hydrothermally altered and/or mineralized, whereas the V1B (85–86 Ma) is hornblende-plagioclase phyric, holo- to hypocrystalline, fresh, and non-mineralized. According to our simplified model, the contrasting productivity of the V1A and V1B is explained by fluctuations during AFC (assimilation-fractional crystallization) processes of water-rich parental magma, which have controlled the order of crystallization of hornblende and plagioclase in the V1A and V1B andesite.

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