Journal article
The timing of sinistral displacement of the Pearya Terrane along the Canadian Arctic Margin
Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, Vol.163(3), pp.251-259
2012
DOI: 10.1127/1860-1804/2012/0163-0251
Abstract
The Pearya Terrane, northern Ellesmere Island, is a composite terrane accreted to the northern margin of Laurentia. Terrane amalgamation occurred between 475 and 460 Ma and accretion occurred by 425 Ma. Mylonites exposed at Cape Columbia are interpreted as the eastern continuation of the Pearya Shear Zone. The mylonitic fabrics in orthogneiss preserve clear evidence of sinistral displacement and are cross-cut by leucocratic pegmatite dikes that give a U-Pb zircon age of 453 ± 3.5 Ma. Quartz and feldspar deformation textures coupled with the orientation of a studied dike are consistent with emplacement during late sinistral deformation. Displacement on the Pearya Shear Zone at or prior to 450 Ma records translation of the Pearya Terrane toward or along the north Laurentian margin in the early stages of the Baltica-Laurentia Caledonian collision.
Details
- Title: Subtitle
- The timing of sinistral displacement of the Pearya Terrane along the Canadian Arctic Margin
- Creators
- William C. McClellandShawn J. MaloneWerner von GosenKarsten PiepjohnAndreas Läufer
- Resource Type
- Journal article
- Publication Details
- Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, Vol.163(3), pp.251-259
- DOI
- 10.1127/1860-1804/2012/0163-0251
- ISSN
- 1860-1804
- Language
- English
- Date published
- 2012
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9984229968002771
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