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TitleAn overview of geochronological constraints on gold mineralization on the Island of Newfoundland and their implications
AuthorSandeman, H A I; Honsberger, I WORCID logo
SourceGeological Association of Canada, Program and Abstracts vol. 58, 2022 p. 53
Alt SeriesNatural Resources Canada, Contribution Series 20220653
PublisherGeological Association of Canada
Mediapaper; digital; on-line
File formatpdf
ProvinceNewfoundland and Labrador
SubjectsScience and Technology; mineralogy; metallic minerals; gold; mineralization
ProgramTargeted Geoscience Initiative (TGI-6) Ore systems
Released2022 03 30
AbstractAlthough gold exploration on the island of Newfoundland started in the early 1900’s, it did not gain significant momentum until the 1977 discovery of gold along the Cape Ray Fault Zone. Exploration in the late 1980's and 1990's led to many new discoveries; however, until the recent exploration boom only a select few gold-related projects had been episodically explored. These were largely restricted to the known auriferous areas of western Newfoundland and on the Avalon Peninsula. The emerging Newfoundland gold district contains numerous gold occurrences spatially associated with Paleozoic crustal-scale fault zones and their subsidiaries. These encompass a number of mined deposits and developed prospects having variably developed resources, and include: 1) Pine Cove Mine (3.63 Mt @ 1.3-2.0g/t for 154,132 oz Au mined); 2) Valentine Lake (~86 Mt at 1.72 g/t Au for ~4.7 Moz Au, measured and indicated); 3) Cape Ray (3.5 Mt @ 3.15g/t for 0.918 Moz Au; measured and indicated); 4) Reid Zone (9.75 Mt @ 0.56 g/t for 176,000 oz Au, indicated); 5) Nugget Pond Mine (0.43 Mt @ 10.5 g/t, 168,748 oz mined); 6) Hammerdown Mine (291,400 t@ 15.83 g/t Au for143,000 oz Au mined); 7) Rattling Brook (5.46 Mt at 1.45g/t for 255,000 oz; indicated); 8) Mosquito Hill (4.47 Mt @ 0.53 g/t for 75,600 oz Au, indicated); 9) Thor (0.357Mt @ 3.19g/t for 36,600 oz Au, indicated); 10) Argyle (0.529 Mt @ 1.99g/t for 33,850 oz Au, probable) and; 11) Stog’er Tight (191,500 oz @ 2.39 g/t for 14,740 oz Au, probable). In addition to these deposits there are numerous other, in some cases newly discovered, gold discoveries in the central Newfoundland Appalachians including, for example, those associated with the Queensway, Moosehead, Kingsway and Toogood exploration projects; extensive drilling is underway on these targets. This contribution summarizes current geochronological constraints on gold mineralization on the Island, evaluates their type and dependability and discusses their implications with respect to our current knowledge of the timing, and broad kinematics, of the geotectonic controls on orogenesis and mineralization. Future research must emphasize the integration of diverse datasets, including: regional and local geological observations; ore parageneses; fluid inclusion analyses; stable and radiogenic isotopic analyses; sulphide trace element analyses; geochronological studies and; ore - host rock lithogeochemical investigations to better constrain the origin of the individual gold mineralized zones.
Summary(Plain Language Summary, not published)
This contribution reviews existing ages for gold mineralization across Newfoundland, and provides new ages as well.

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