Geology and Hydrothermal Alteration of the World-Class Canadian Malartic Gold Deposit: Genesis of an Archean Stockwork-Disseminated Gold Deposit in the Abitibi Greenstone Belt

2017 ◽  
Author(s):  
Stéphane De Souza ◽  
Benoît Dubé ◽  
Vicki McNicoll ◽  
Céline Dupuis ◽  
Patrick Mercier-Langevin ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Hydrothermal Alteration ◽  
Greenstone Belt ◽  
Abitibi Greenstone Belt ◽  
The World ◽  
World Class

Hydrothermal Alteration Mineralogy and Geochemistry of the Archean World-Class Canadian Malartic Disseminated-Stockwork Gold Deposit, Southern Abitibi Greenstone Belt, Quebec, Canada

2019 ◽  
Vol 114 (6) ◽  
pp. 1057-1094 ◽  
Author(s):  
Stéphane De Souza ◽  
Benoît Dubé ◽  
Patrick Mercier-Langevin ◽  
Vicki McNicoll ◽  
Céline Dupuis ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Fault Zone ◽  
Hydrothermal Alteration ◽  
Greenstone Belt ◽  
Gold Mineralization ◽  
Amphibolite Facies ◽  
Alteration Zone ◽  
Gold Deposition ◽  
Abitibi Greenstone Belt ◽  
World Class

Abstract The Canadian Malartic stockwork-disseminated gold deposit is an Archean world-class deposit located in the southern Abitibi greenstone belt. It contains over 332.8 tonnes (t; 10.7 Moz) of Au at a grade of 0.97 ppm, in addition to 160 t (5.14 Moz) of past production (1935–1981). Although the deposit is partly situated within the Larder Lake-Cadillac fault zone, most of the ore occurs up to ~1.5 km to the south of the fault zone. The main hosts of the mineralized zones are greenschist facies turbiditic graywacke and mudstone of the Pontiac Group (~2685–2682 Ma) and predominantly subalkaline ~2678 Ma porphyritic quartz monzodiorite and granodiorite. These intrusions were emplaced during an episode of clastic sedimentation and alkaline to subalkaline magmatism known as the Timiskaming assemblage (<2680–2670 Ma in the southern Abitibi). The orebodies define two main mineralized trends, which are oriented subparallel to the NW-striking S2 cleavage and the E-striking, S-dipping Sladen fault zone. This syn- to post-D2 ductile-brittle to brittle Sladen fault zone is mineralized for more than 3 km along strike. The ore mainly consists of disseminated pyrite in stockworks and replacement zones, with subordinate auriferous quartz veins and breccia. Gold is associated with pyrite and traces of tellurides defining an Au-Te-W ± Ag-Bi-Mo-Pb signature. The orebodies are zoned outward, and most of the higher-grade (>1 ppm Au) ore was deposited as a result of iron sulfidation from silicates and oxides and Na-K metasomatism in carbonatized rocks. The alteration footprint comprises a proximal alteration envelope (K- or Na-feldspar-dolomite-calcite-pyrite ± phlogopite). This proximal alteration zone transitions to an outer shell of altered rocks (biotite-calcite-phengitic white mica), which hosts sub-ppm gold grades and reflects decreasing carbonatization, sulfidation, and aNa+/aH+ or aK+/aH+ of the ore fluid. Gold mineralization, with an inferred age of ~2664 Ma (Re-Os molybdenite), was contemporaneous with syn- to late-D2 peak metamorphism in the Pontiac Group; it postdates sedimentation of the Timiskaming assemblage along the Larder Lake-Cadillac fault zone (~2680–2669 Ma) and crystallization of the quartz monzodiorite. These chronological relationships agree with a model of CO2-rich auriferous fluid generation in amphibolite facies rocks of the Pontiac Group and gold deposition in syn- to late-D2 structures in the upper greenschist to amphibolite facies. The variable geometry, rheology, and composition of the various intrusive and sedimentary rocks have provided strain heterogeneities and chemical gradients for the formation of structural and chemical traps that host the gold. The Canadian Malartic deposit corresponds to a mesozonal stockwork-disseminated replacement-type deposit formed within an orogenic setting. The predominance of disseminated replacement ore over fault-fill and extensional quartz-carbonate vein systems suggests that the mineralized fracture networks remained relatively permeable and that fluids circulated at a near-constant hydraulic gradient during the main phase of auriferous hydrothermal alteration.

scholarly journals Geology, hydrothermal alteration, and genesis of the world-class Canadian Malartic stockwork-disseminated Archean gold deposit, Abitibi, Quebec

2015 ◽  
Author(s):  
S De Souza ◽  
B Dubé ◽  
V J McNicoll ◽  
C Dupuis ◽  
P Mercier-Langevin ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Hydrothermal Alteration ◽  
The World ◽  
World Class

scholarly journals (Day 5 - part I) Geology and disseminated-stockwork gold mineralization at the world-class Canadian Malartic mine, Abitibi greenstone belt, Canada

2017 ◽  
Author(s):  
S De Souza ◽  
B Dubé ◽  
V McNicoll ◽  
P Mercier-Langevin ◽  
R A Creaser ◽  
...  
Keyword(s):  
Greenstone Belt ◽  
Gold Mineralization ◽  
Abitibi Greenstone Belt ◽  
The World ◽  
World Class

scholarly journals Fluid signature of the shear zone–controlled Veio de Quartzo ore body in the world-class BIF-hosted Cuiabá gold deposit, Archaean Rio das Velhas greenstone belt, Brazil: a fluid inclusion study

2020 ◽  
Vol 55 (7) ◽  
pp. 1441-1466 ◽  
Author(s):  
Carolin Kresse ◽  
Lydia M. Lobato ◽  
Rosaline C. Figueiredo e Silva ◽  
Steffen G. Hagemann ◽  
David Banks ◽  
...  
Keyword(s):  
Fluid Inclusion ◽  
Gold Deposit ◽  
Shear Zone ◽  
Greenstone Belt ◽  
Fluid Inclusion Study ◽  
Ore Body ◽  
The World ◽  
Inclusion Study ◽  
World Class

scholarly journals The structural history and mineralization controls of the world-class Geita Hill gold deposit, Geita Greenstone Belt, Tanzania

2016 ◽  
Vol 52 (2) ◽  
pp. 257-279 ◽  
Author(s):  
I. V. Sanislav ◽  
M. Brayshaw ◽  
S. L. Kolling ◽  
P. H. G. M. Dirks ◽  
Y. A. Cook ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Greenstone Belt ◽  
The World ◽  
Structural History ◽  
World Class

Alteration paragenesis and the timing of mineralised quartz veins at the world-class Geita Hill gold deposit, Geita Greenstone Belt, Tanzania

2017 ◽  
Vol 91 ◽  
pp. 765-779 ◽  
Author(s):  
Matthew R. van Ryt ◽  
Ioan V. Sanislav ◽  
Paul H.G.M. Dirks ◽  
Jan M. Huizenga ◽  
Marwa I. Mturi ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Greenstone Belt ◽  
Quartz Veins ◽  
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

In situ pyrite sulfur isotope and trace element analyses of the world-class Dachang gold deposit, northern Qinghai-Tibetan Plateau: implications for metallogenesis

2021 ◽  
pp. 104347
Author(s):  
Wei Zhai ◽  
Si-qi Zheng ◽  
Ling-yu Zhang ◽  
Xiao-ming Sun ◽  
Jin-long Liang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Trace Element ◽  
Gold Deposit ◽  
Sulfur Isotope ◽  
The World ◽  
World Class

The world-class Musselwhite BIF-hosted gold deposit, Superior Province, Canada: New high-precision U–Pb geochronology and implications for the geological setting of the deposit and gold exploration

2016 ◽  
Vol 272 ◽  
pp. 133-149 ◽  
Author(s):  
Vicki McNicoll ◽  
Benoît Dubé ◽  
Sébastien Castonguay ◽  
William Oswald ◽  
John Biczok ◽  
...  
Keyword(s):  
Gold Deposit ◽  
High Precision ◽  
Superior Province ◽  
Gold Exploration ◽  
Geological Setting ◽  
The World ◽  
World Class

Geochronological Constraints on Pre-, Syn-, and Postmineralization Events at the World-Class Cleo Gold Deposit, Eastern Goldfields Province, Western Australia

2002 ◽  
Vol 97 (3) ◽  
pp. 541-559 ◽  
Author(s):  
S. M. Brown ◽  
I. R. Fletcher ◽  
H. J. Stein ◽  
L. W. Snee ◽  
D. I. Groves
Keyword(s):  
Gold Deposit ◽  
Western Australia ◽  
The World ◽  
World Class ◽  
Geochronological Constraints
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