scholarly journals Supplemental Material: A metasedimentary source of gold in Archean orogenic gold deposits

2021 ◽  
Author(s):  
Iain Pitcairn ◽  
et al.
Keyword(s):  
Black Shale ◽  
Gold Deposits ◽  
Orogenic Gold ◽  
Test Results ◽  
Orogenic Gold Deposits ◽  
Metamorphic Facies ◽  
Archean Orogenic Gold Deposits

Compositions of metasedimentary samples, and Table S2 (geochemical compositions of Pontiac, Porcupine and Cadillac samples collected in this study including sample locations, grid references and metamorphic facies grouping; black shale database including Au, As, and Sb data and sample name; and Mann-Whitney U-test results).<br>

scholarly journals Supplemental Material: A metasedimentary source of gold in Archean orogenic gold deposits

2021 ◽  
Author(s):  
Iain Pitcairn ◽  
et al.
Keyword(s):  
Black Shale ◽  
Gold Deposits ◽  
Orogenic Gold ◽  
Test Results ◽  
Orogenic Gold Deposits ◽  
Metamorphic Facies ◽  
Archean Orogenic Gold Deposits

Compositions of metasedimentary samples, and Table S2 (geochemical compositions of Pontiac, Porcupine and Cadillac samples collected in this study including sample locations, grid references and metamorphic facies grouping; black shale database including Au, As, and Sb data and sample name; and Mann-Whitney U-test results).<br>

A metasedimentary source of gold in Archean orogenic gold deposits

Geology ◽  
2021 ◽  
Author(s):  
Iain K. Pitcairn ◽  
Nikolaos Leventis ◽  
Georges Beaudoin ◽  
Stephane Faure ◽  
Carl Guilmette ◽  
...  
Keyword(s):  
Sedimentary Rock ◽  
Sedimentary Rocks ◽  
Gold Deposits ◽  
Metamorphic Grade ◽  
Orogenic Gold ◽  
Metal Source ◽  
Main Metal ◽  
Metasedimentary Rocks ◽  
Orogenic Gold Deposits ◽  
Archean Orogenic Gold Deposits

The sources of metals enriched in Archean orogenic gold deposits have long been debated. Metasedimentary rocks, which are generally accepted as the main metal source in Phanerozoic deposits, are less abundant in Archean greenstone belts and commonly discounted as a viable metal source for Archean deposits. We report ultralow-detection-limit gold and trace-element concentrations from a suite of metamorphosed sedimentary rocks from the Abitibi belt and Pontiac subprovince, Superior Province, Canada. Systematic decreases in the Au content with increasing metamorphic grade indicate that Au was mobilized during prograde metamorphism. Mass balance calculations show that over 10 t of Au, 30,000 t of As, and 600 t of Sb were mobilized from 1 km3 of Pontiac subprovince sedimentary rock metamorphosed to the sillimanite metamorphic zone. The total gold resource in orogenic gold deposits in the southern Abitibi belt (7500 t Au) is only 3% of the Au mobilized from the estimated total volume of high-metamorphic-grade Pontiac sedimentary rock in the region (25,000 km3), indicating that sedimentary rocks are a major contributor of metals to the orogenic gold deposits in the southern Abitibi belt.

Microscopic and NanoSIMS characterization of black shale-hosted pre-kinematic pyrites: possible gold source of the orogenic gold deposits in the Truchas Syncline (Variscan Iberian Massif)

2021 ◽  
pp. 104344
Author(s):  
Fernando Gómez-Fernández ◽  
John K. Cunningham ◽  
Pablo Caldevilla ◽  
Antonio Herrero-Hernández ◽  
Andrew D. Beard
Keyword(s):  
Black Shale ◽  
Gold Deposits ◽  
Orogenic Gold ◽  
Iberian Massif ◽  
Orogenic Gold Deposits
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