Kirkwood, Donna, Malo, Michel (1993) Across-strike geometry of the Grand Pabos fault zone: evidence for Devonian dextral transpression in the Quebec Appalachians. Canadian Journal of Earth Sciences, 30 (7) 1363-1373 doi:10.1139/e93-117
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Across-strike geometry of the Grand Pabos fault zone: evidence for Devonian dextral transpression in the Quebec Appalachians | ||
| Journal | Canadian Journal of Earth Sciences | ||
| Authors | Kirkwood, Donna | Author | |
| Malo, Michel | Author | ||
| Year | 1993 (July 1) | Volume | 30 |
| Issue | 7 | ||
| Publisher | Canadian Science Publishing | ||
| DOI | doi:10.1139/e93-117Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 482237 | Long-form Identifier | mindat:1:5:482237:4 |
| GUID | 0 | ||
| Full Reference | Kirkwood, Donna, Malo, Michel (1993) Across-strike geometry of the Grand Pabos fault zone: evidence for Devonian dextral transpression in the Quebec Appalachians. Canadian Journal of Earth Sciences, 30 (7) 1363-1373 doi:10.1139/e93-117 | ||
| Plain Text | Kirkwood, Donna, Malo, Michel (1993) Across-strike geometry of the Grand Pabos fault zone: evidence for Devonian dextral transpression in the Quebec Appalachians. Canadian Journal of Earth Sciences, 30 (7) 1363-1373 doi:10.1139/e93-117 | ||
| In | (1993, July) Canadian Journal of Earth Sciences Vol. 30 (7) Canadian Science Publishing | ||
| Abstract/Notes | The principal faults of southeastern Gaspé Peninsula in Quebec consist of a central high-strain zone that is characterized by mainly ductile deformation structures and bordered by low-strain zones each dominated by brittle deformation structures. The overall geometry of shear fractures within the low-strain zones is quite similar to the expected geometry of Riedel shear fractures. The brittle structures overprint the dominant C–S-type fabric of the high-strain zone, which implies that brittle deformation outlasted ductile deformation. The asymmetry of local micro- to meso-scale deformation features along the fault zones reflects the non-coaxiality of the shear. Other features described within the fault zone (stylolitic cleavage, shear bands, and reverse faults) are evidence for a component of shortening perpendicular or oblique to the fault zone. The geometry of the Grand Pabos fault zone (GPFZ), a major fault of southern Gaspé, indicates that deeper seated fault rocks (high-strain zone) have been brought up to higher crustal levels and are presently in contact with brittlely deformed fault rocks (low-strain zone). The proposed model for the evolution of the GPFZ involves Early to Late Devonian, dextral, transcurrent movement accompanied by relatively minor amounts of vertical slip within a dextral transpressive regime. The main pulse of the Acadian orogeny in Gaspé is restricted to the Devonian and therefore occurred later than elsewhere in the Canadian Appalachians. | ||
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