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TitleGeological overview of the Dog Bay Line - Appleton Fault Zone gold corridor, northeast-central Newfoundland, Canada
AuthorHonsberger, I WORCID logo; Sandeman, H A I
SourceAtlantic Geoscience vol. 59, 2023 p. 80, Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesNatural Resources Canada, Contribution Series 20220675
PublisherAtlantic Geoscience
Mediapaper; digital; on-line
File formatpdf
ProvinceNewfoundland and Labrador
SubjectsScience and Technology; metallic minerals; gold; fault zones
ProgramTargeted Geoscience Initiative (TGI-6) Ore systems
Released2023 05 03
AbstractThe Dog Bay Line and Appleton Fault Zone in the eastern Dunnage Zone of northeast-central Newfoundland are adjacent structural zones of focused deformation that host significant orogenic gold mineralization. Targeted exploration along the Dog Bay Line - Appleton Fault Zone gold corridor is uncovering well-preserved orogenic gold systems with high potential for continued discoveries. Auriferous host rocks along the Dog Bay Line - Appleton Fault Zone gold corridor include structurally imbricated, clastic sedimentary rock slices with numerous mafic and silicic intrusions. The sedimentary rocks consist of sandstone, siltstone, shale, and locally conglomeratic, sequences of the Ordovician Davidsville Group and stratigraphically overlying Indian Islands Group and Ten Mile Lake Formation. Regionally, these sedimentary rocks are variably deformed, but retain a penetrative, steeply southeast-dipping, tightly spaced cleavage that likely coincides with thrust imbrication during the Acadian orogenic cycle. The mafic intrusions consist of Ordovician to Devonian, variably textured, tholeiitic to calc-alkaline gabbros and hypabyssal dykes that occur proximal to the trace of the Dog Bay Line. Small sills of syenogranite also occur locally. Within the gold-mineralized deformation zones, the sedimentary host rocks are typically shale-rich, with local mélange, and the mafic intrusions are commonly strongly altered to low-grade, sulphide-bearing, secondary mineral assemblages. Orogenic gold mineralization is characterized by numerous structurally controlled, gold-bearing quartz vein-filled fracture networks that cut both the sedimentary and igneous host rocks. Gold mineralization is at least post-Ordovician and may be as young, or younger than, Late Devonian, with multiple gold-mineralizing events possible. Future research along the Dog Bay Line - Appleton Fault Zone gold corridor will include systematic analysis and synthesis of structural, geophysical, lithogeochemical, and mineralogical data. Furthermore, integration of geochronological and petrological datasets with structural information will aid in the development of a comprehensive tectonic model for orogenic gold mineralization along the corridor.
Summary(Plain Language Summary, not published)
This contribution summarizes the geological setting of gold mineralization along prospective fault zones in northeast-central Newfoundland.

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