scholarly journals Volcanic stratigraphy, structural geology, and gold mineralization in the Wolverine-Doris corridor, northern Hope Bay volcanic belt, Nunavut

2003 ◽  
Author(s):  
R L Sherlock ◽  
R L Carpenter ◽  
C Quang
Keyword(s):  
Structural Geology ◽  
Gold Mineralization ◽  
Volcanic Belt ◽  
Volcanic Stratigraphy ◽  
Hope Bay

scholarly journals Volcanic relationships and gold mineralization in the Wolverine-Madrid corridor, Hope Bay volcanic belt, Nunavut

2002 ◽  
Author(s):  
R L Sherlock ◽  
R L Carpenter ◽  
M Bardoux ◽  
E Flood ◽  
P Kleespies
Keyword(s):  
Gold Mineralization ◽  
Volcanic Belt ◽  
Hope Bay

Geochemistry and U/Pb geochronology of the Williams Brook area, Tobique-Chaleur zone, New Brunswick: stratigraphic and geotectonic setting of gold mineralization

2021 ◽  
Author(s):  
Dennis Sánchez-Mora ◽  
Christopher R.M. McFarlane ◽  
James A Walker ◽  
David R. Lentz
Keyword(s):  
New Brunswick ◽  
Gold Mineralization ◽  
Tectonic Setting ◽  
Volcanic Rocks ◽  
Crustal Contamination ◽  
Volcanic Belt ◽  
Temporal Variations ◽  
Lower Percentage ◽  
Oblique Convergence ◽  
Felsic Volcanic

Gold mineralization at Williams Brook in northern New Brunswick is hosted within the Siluro-Devonian, bimodal, volcano-sedimentary rocks of the Tobique-Chaleur Zone (Wapske Formation). Gold mineralization occurs in two styles: 1) as disseminations (refractory gold) in rhyolite, and 2) in cross-cutting quartz veins (free gold). Dating of the felsic volcanic host rocks by in situ LA-ICP-MS zircon U-Pb geochronology returned ages of 422 ± 3, 409 ± 2, 408 ± 3, 405 ± 2, 401 ± 9 Ma. Zr/Y of subvolcanic felsic intrusion (<8 for syn-mineralization and >8 for post-mineralization) suggests evolution from transitional to more alkalic affinities. Two mineralizing events are recognized; the first is a disseminated mineralization style formed at ~422–416 Ma and the second consists of quartz vein-hosted gold emplaced at 410–408 Ma. Felsic rocks from Williams Brook and elsewhere in the Tobique Group (i.e. Wapske, Costigan Mountain, and Benjamin formations), and the Coastal Volcanic Belt have similar Th/Nb ratios of ~0.1 to 1, reflecting similar levels of crustal contamination, and similar Nb and Y content, suggesting A-type affinities. These data indicate a similar environment of formation. Regionally, mafic rocks show similar within-plate continental signatures and an E-MORB mantle source that formed from partial melts of 10–30%. Mafic volcanic rocks from Williams Brook have a more alkaline affinity (based on Ti/V), and derivation from lower percentage partial melting (~5%). The chemical and temporal variations in the Williams Brook rocks suggest that they were erupted in an evolving transpressional tectonic setting during the oblique convergence of Gondwana and Laurentia.

Epithermal gold mineralization in Cretaceous volcanic belt, SE China: Insight from the Shangshangang deposit

2020 ◽  
Vol 118 ◽  
pp. 103355 ◽  
Author(s):  
Meng–Ting Chen ◽  
Jun–Hao Wei ◽  
Yan–Jun Li ◽  
Wen–Jie Shi ◽  
Nai–Zhong Liu
Keyword(s):  
Gold Mineralization ◽  
Volcanic Belt ◽  
Epithermal Gold ◽  
Se China

scholarly journals Role of metalliferous mudstones and detrital shales in the localization, genesis, and paleoenvironment of volcanogenic massive sulphide deposits of the Tally Pond volcanic belt, central Newfoundland, Canada

2016 ◽  
Vol 53 (4) ◽  
pp. 387-425 ◽  
Author(s):  
Stefanie Lode ◽  
Stephen J. Piercey ◽  
Gerald C. Squires
Keyword(s):  
Base Metal ◽  
Volcanic Belt ◽  
Hydrothermal Activity ◽  
Black Shales ◽  
Massive Sulphide ◽  
Volcanic Stratigraphy ◽  
Volcanogenic Massive Sulphide ◽  
Vms Deposits ◽  
Oxygenated Water ◽  
Structural Blocks

The Cambrian Tally Pond volcanic belt in central Newfoundland contains numerous volcanogenic massive sulphide (VMS) deposits and prospects associated with exhalative metalliferous mudstones. Deposits in the belt are bimodal felsic VMS deposits that are both base metal bearing (e.g., Duck Pond – Boundary), and base metal and precious metal bearing (Lemarchant). At the Lemarchant deposit, metalliferous mudstones are stratigraphically and genetically associated with mineralization. In the remainder of the Tally Pond belt, detrital shales occur predominantly in the northeastern part of the belt (mostly as unrelated mid-Ordovician structural blocks) in the upper sections of the Cambrian volcanic stratigraphy, but locally also are intercalated with metalliferous mudstones. Their relationships to massive sulphides are less obvious, with many spatially, but not necessarily genetically, related to mineralization. Upper Cambrian to Lower Ordovician black shales from Bell Island, which represent pelagic sedimentation not associated with hydrothermal activity and volcanism, are compared with the Tally Pond belt mudstones and shales. Exhalative mudstones, like those at Lemarchant, have elevated Fe/Al and base-metal values, and have shale-normalized negative Ce and positive Eu anomalies, indicative of deposition from high-temperature (>250 °C) hydrothermal fluids within an oxygenated water column. Mudstones and shales sampled from other Tally Pond prospects have more variable signatures, ranging from hydrothermal to nonhydrothermal black shales (no positive Eu anomalies, flat rare earth element patterns, low Fe/Al and base-metal contents), to those that have mixed signatures. Accordingly, mudstones from areas with a Lemarchant-like hydrothermal and vent-proximal character are more attractive exploration targets than mudstones and shales with predominantly detrital signatures.

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