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TitleTectonostratigraphic controls on the Connaigre Peninsula of south-central Newfoundland and their implications for intrusion-related mineral resources
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorRogers, N; Kellett, D AORCID logo; McNicoll, V J; van Staal, CORCID logo; Ruberti, G; Kerr, A
SourceTGI 4 - Intrusion Related Mineralisation Project: new vectors to buried porphyry-style mineralisation; by Rogers, N (ed.); Geological Survey of Canada, Open File 7843, 2015 p. 59-78, Open Access logo Open Access
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in TGI 4 - Intrusion Related Mineralisation Project: new vectors to buried porphyry-style mineralisation
File formatpdf
ProvinceNewfoundland and Labrador
AreaConnaigre Peninsula
Lat/Long WENS -56.5000 -55.0000 48.0000 47.5000
Subjectseconomic geology; tectonics; geochronology; porphyry deposits; porphyry copper; mineral exploration; mineralization; alteration; indicator elements; tungsten; molybdenum; tin; bismuth; mineral deposits; structural interpretations; tectonic models; tectonic environments; tectonic elements; intrusive rocks; granitic rocks; tectonostratigraphic zones; uranium lead dates; Tickle Point Formation; Furby's Cove Intrusive Suite; Connaigre Bay Group; Simmons Brook Intrusive Suite; Harbour Breton Granite; Hardy's Cove Intrusive Suite; Grole Intrusive Suite; Long Harbour Group; Young's Cove Group; Pass Island Granite; Cinq Isles Formation; Great Bay de L'Eau Formation; Poole's Cove Formation; Old Woman Stock; Paleozoic; Devonian; Silurian
Illustrationslocation maps; plots; photographs; tables; cross-sections
ProgramTargeted Geoscience Initiative (TGI-4) Intrusion/Porphyry Ore Systems
Released2015 06 11; 2023 03 17
AbstractThe Connaigre Peninsula of south-central Newfoundland has long been considered to be amongst the most complete and best exposed sections of Neoacadian and older Avalonian rocks in the Appalachians. The rocks of this region range from the Cryogenian volcano-sedimentary rocks of the Tickle Point Formation (ca. 682 Ma rhyolite) to the Middle to Upper Devonian clastic sedimentary rocks of the Great Bay De L'Eau and Poole's Cove formations and Late Devonian Belleoram Granite and Old Woman Stock (ca. 380 Ma). However the recent age determination of the Pass Island Granite that shows it as Silurian (423 ± 4 Ma), contradicts earlier interpretations that the whole of the Connaigre Peninsula formed on the Avalonian microcontinent. It is now evident that the eastern portion exhibits a distinct Neoproterozoic to Lower Palaeozoic tectonostratigraphy.
Five distinct phases of granitoid emplacement are recorded across the Connaigre Peninsula. The oldest of these is the Furby's Cove Intrusive Suite (ca. 673 Ma) that intruded the Tickle Point Formation prior to deposition of the Connaigre Bay Group. The later unit is in turn cut by the ca. 620 Ma Simmons Brook Intrusive Suite. All of these units are cut by a series of ca. 570 Ma intrusive bodies belonging to the Grole and Hardy's Cove intrusive suites and Harbour Breton Granite. At the southern end of Hermitage Bay, Grole Intrusive Suite rocks are intruded by the Silurian Pass Island Granite. All of these units are restricted to a region between the Hermitage Bay Fault to the west and the White Horse - East Bay fault to the east. The youngest intrusive rocks in the region are the Late Devonian Belleoram and Old Woman granitic bodies, as well as a series of mafic sills and/or flows on the Boxey Point Promontory, and several minor granitic dykes and small bodies that are considered offshoots of the Belleoram Granite. These Late Devonian intrusions are only known to cut the Ediacaran Long Harbour Group, Latest Ediacaran to Upper Cambrian Young's Cove Group and Devonian Cinq Isles, Poole's Cove and Great Bay De L'Eau formations, which are restricted to (or in the case of the Cinq Isles and Poole's Cove formations partly overlap) the areas to the east of the White Horse - East Bay fault. Given the different pre-Devonian tectonostratigraphies on either side of the White Horse - East Bay fault, the Connaigre Peninsula is herein informally divided into the Deadman's Bight (western) and Wreck Cove (eastern) domains.
Intrusion related mineralisation on the Connaigre Peninsula is largely restricted to Mo +/- Cu and fluorite occurrences associated with the Old Woman Stock. Similar Mo deposits occur within the coeval Ackley Pluton to the north-east and the associated minor intrusion on Belle Island. However to date no Mo mineralisation has been identified within the age equivalent Belleoram Granite, although minor fluorite occurrences are observed.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI-4) is a collaborative federal geoscience program that provides industry with the next generation of geoscience knowledge and innovative techniques to better detect buried mineral deposits, thereby reducing some of the risks of exploration. This volume summarises research activities completed under the TGI 4 Intrusion Related Mineralisation Project that focused on porphyry-style ore systems related to the Cu- and Cu-Mo deposits of South-Central British Columbia and the Sn-W-Mo-In deposits in New Brunswick, Nova Scotia and Newfoundland.

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