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TitleStratigraphy and lithogeochemistry of rocks from the Nugget Pond Deposit area, Baie Verte Peninsula, Newfoundland
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMueller, C; Piercey, S JORCID logo; Babechuk, M G; Copeland, D
SourceTargeted Geoscience Initiative 5: grant program final reports (2018-2020); by Targeted Geoscience Initiative Coordination Office; Geological Survey of Canada, Open File 8755, 2021 p. 217-234, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative 5: grant program final reports (2018-2020)
File formatpdf
ProvinceNewfoundland and Labrador
AreaIsland of Newfoundland; Baie Verte Peninsula; Betts Cove
Lat/Long WENS -55.8000 -55.7333 49.8667 49.8333
Subjectseconomic geology; geochemistry; stratigraphy; tectonics; Science and Technology; Nature and Environment; mineral exploration; mineral deposits; gold; sulphide deposits; volcanogenic deposits; ore mineral genesis; mineralization; ore controls; stratigraphic analyses; lithogeochemistry; drillholes; bedrock geology; lithology; igneous rocks; volcanic rocks; basalts; mafic volcanic rocks; lava flows; pillow lavas; tholeiites; breccias, volcanic; volcano-sedimentary strata; volcaniclastics; intrusive rocks; gabbros; sedimentary rocks; siltstones; cherts; iron formations; clastics; mafic rocks; structural features; faults; unconformities; tectonic history; magmatism; hydrothermal systems; intrusions; iron geochemistry; aluminum geochemistry; geochemical anomalies; cerium geochemistry; trace element geochemistry; depositional environment; alteration; models; Nugget Pond Deposit; Nugget Pond Mine; Appalachian Province; Snooks Arm Group; Mount Misery Formation; Scrape Point Formation; Nugget Pond Member; Iapetus Ocean; Betts Cove Complex; Goldenville Deposit; Phanerozoic; Paleozoic; Ordovician; Cambrian
Illustrationslocation maps; geoscientific sketch maps; stratigraphic columns; lithologic logs; tables; geochemical plots; ternary diagrams
ProgramTargeted Geoscience Initiative (TGI-5) Knowledge Management Coordination
Released2021 10 27
AbstractStratigraphic and lithogeochemical data were collected from selected drill core from the Nugget Pond gold deposit in the Betts Cove area, Newfoundland. The stratigraphy consists of a lower unit of basaltic rocks that are massive to pillowed (Mount Misery Formation). This is overlain by sedimentary rocks of the Scrape Point Formation that consist of lower unit of turbiditic siltstone and hematitic cherts/iron formations (the Nugget Pond member); the unit locally has a volcaniclastic rich-unit at its base and grades upwards into finer grained volcaniclastic/turbiditic rocks. This is capped by basaltic rocks of the Scrape Point Formation that contain pillowed and massive mafic flows that are distinctively plagioclase porphyritic to glomeroporphyritic. The mafic rocks of the Mount Misery Formation have island arc tholeiitic affinities, whereas Scrape Point Formation mafic rocks have normal mid-ocean ridge (N-MORB) to backarc basin basalt (BABB) affinities. One sample of the latter formation has a calc-alkalic affinity. All of these geochemical features are consistent with results and conclusions from previous workers in the area. Clastic sedimentary rocks and Fe-rich sedimentary rocks of the Scrape Point Formation have features consistent with derivation from local, juvenile sources (i.e., intra-basinal mafic rocks). The Scrape Point Formation sedimentary rocks with the highest Fe/Al ratios, inferred to have greatest amount of hydrothermally derived Fe, have positive Ce anomalies on Post-Archean Australian Shale (PAAS)-normalized trace element plots. These features are consistent with having formed via hydrothermal venting into an anoxic/ sub-oxic water column. Further work is needed to test whether these redox features are a localized feature (i.e., restricted basin) or a widespread feature of the late Cambrian-early Ordovician Iapetus Ocean, as well as to delineate the role that these Fe-rich sedimentary rocks have played in the localization of gold mineralization within the Nugget Pond deposit.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is a collaborative federal geoscience program that provides industry with the next generation of geoscience knowledge and innovative techniques, which will result in more effective targeting of buried mineral deposits. This compendium is the result of the TGI Grant Recipients 2018-2020.

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