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TitleField mapping of the Eastern Highlands Shear Zone, Cape Breton Island, Nova Scotia
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPiette-Lauzière, N; Larson, K P; Kellett, D AORCID logo
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; by Rogers, N (ed.); Geological Survey of Canada, Open File 8358, 2018 p. 23-29, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative: 2017 report of activities, volume 1
File formatpdf
ProvinceNova Scotia
NTS11K/09; 11K/10
AreaCanadian Appalachians; Cape Breton Island
Lat/Long WENS -60.7492 -60.4144 46.7467 46.5644
Subjectseconomic geology; tectonics; structural geology; mineral deposits; mineral exploration; mineral potential; porphyry deposits; polymetallic ores; ore mineral genesis; ore controls; structural controls; structural features; shear zones; faults; lineations; tectonic evolution; tectonic setting; metamorphism; deformation; brecciation; hydrothermal alteration; magmatism; intrusions; emplacement; accretion; kinematic analysis; fabric analysis; trend surface analysis; bedrock geology; lithology; igneous rocks; intrusive rocks; granites; granodiorites; tonalites; diorites; volcanic rocks; rhyolites; tuffs; sedimentary rocks; greywackes; volcano-sedimentary strata; metasedimentary rocks; psammites; metamorphic rocks; marbles; amphibolites; gneisses; orthogneisses; garnet; Eastern Highlands Shear Zone; Bras-d'Or Terrane; Aspy Terrane; Ganderia; Appalachian Accretionary Belt; Avalonia; Acadian Orogeny; Roper Brook Diorite; Appalachian Orogeny; Phanerozoic; Paleozoic; Devonian; Silurian
Illustrationsgeoscientific sketch maps; cross-sections; photographs; photomicrographs
ProgramTargeted Geoscience Initiative (TGI-5) Knowledge Management Coordination
ProgramTargeted Geoscience Initiative (TGI-5) Porphyry systems
Released2018 01 19
AbstractThe Eastern Highlands shear zone (EHSZ) is located on Cape Breton Island where it separates rocks of the Bras-d'Or and Aspy terranes within Ganderia in the Appalachian accretionary belt. It records late Silurian to Early Devonian shear with east-over-west kinematics (D1) and a second deformation event (D2) with oblique dextral and west-over-east kinematics of unknown timing. Field mapping and thin section observations identified a third deformation event (D3) with brittle ductile fabrics, brecciation and hydrothermal alteration of a granite on the Aspy side of the EHSZ. These new mapping results contribute to our understanding of the later stages of deformation and their interplay with hydrothermal alteration. They also provide the framework for further studies attempting to reconstruct the postorogenic reactivation of the EHSZ and the associated magmatic-hydrothermal processes that may have contributed to the mineral endowment of the orogen.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is directed towards providing next generation knowledge and methods to facilitate more effective targeting of buried mineral deposits. The program aims to enhance the effectiveness of exploration for Canada¿s major mineral systems by resolving foundational geoscience problems that constrain the geological processes responsible for the liberation metals from their source region, transportation of these ore metals and control their eventual deposition. TGI supports projects on gold, Ni-Cr-PGE, porphyry-style mineralization, uranium and volcanic- and sedimentary-hosted base metal mineralization ore systems, with each project divided into subprojects focused on resolving specific knowledge gaps by integrating data and studies from multiple sites across Canada. Herein, we present interim results and interpretations from a selection of the research activities currently being conducted under the auspices of TGI.

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