Regional metamorphism of the Appalachian Humber zone of Gaspé Peninsula: 40Ar/39Ar evidence for crustal thickening during the Taconian orogeny

2003 ◽  
Vol 40 (2) ◽  
pp. 301-315 ◽  
Author(s):  
Alix Pincivy ◽  
Michel Malo ◽  
Gilles Ruffet ◽  
Alain Tremblay ◽  
Paul E Sacks
Keyword(s):  
Regional Metamorphism ◽  
Late Ordovician ◽  
Crustal Thickening ◽  
Single Grain ◽  
Laurentian Margin ◽  
Gaspe Peninsula ◽  
Gaspé Peninsula ◽  
Canadian Appalachians

Geochronological studies on the timing of deformation and metamorphism along the Laurentian margin have shown that the ages of metamorphic events change along-strike within the Newfoundland – southern Quebec segment of the Canadian Appalachians. The Gaspé Peninsula is located at mid-point of the two extremities of this segment. New single-grain laser 40Ar/39Ar plateau ages solely reflect latest Middle–Late Ordovician metamorphism. Samples taken within the internal Humber zone in the Shickshock Group rocks yield 40Ar/39Ar muscovite and hornblende ages ranging from 457 to 454 Ma. Samples from the Amphibolite du Diable, the metamorphic sole of the Mont Albert ophiolite, yield 40Ar/39Ar muscovite and hornblende ages ranging from 459 to 457 Ma. Ordovician ages of the internal Humber zone are consistent with 40Ar/39Ar ages from southern Quebec and are interpreted as the result of the emplacement onto the margin of both the ophiolite and its metamorphic sole.

Carlin-like gold mineralization in the Gaspé Peninsula, Canadian Appalachians

2005 ◽  
pp. 549-552
Author(s):  
M. Malo ◽  
B. Dubé ◽  
V. Garnier ◽  
A. Chagnon
Keyword(s):  
Gold Mineralization ◽  
Gaspe Peninsula ◽  
Gaspé Peninsula ◽  
Canadian Appalachians

Carlin-type gold mineralization at Saint-André-de-Ristigouche, Gaspé Peninsula (Québec), Canadian Appalachians

2007 ◽  
Vol 42 (6) ◽  
pp. 639-662 ◽  
Author(s):  
V. Garnier ◽  
M. Malo ◽  
B. Dubé ◽  
A. Chagnon ◽  
G. Beaudoin
Keyword(s):  
Gold Mineralization ◽  
Gaspe Peninsula ◽  
Gaspé Peninsula ◽  
Canadian Appalachians

Taconic and Acadian Folds in Northern and Western Gaspé Peninsula, Quebec

1973 ◽  
Vol 10 (4) ◽  
pp. 498-509 ◽  
Author(s):  
A. Carrara ◽  
W. K. Fyson
Keyword(s):  
Late Ordovician ◽  
Metamorphic Rocks ◽  
Low Grade ◽  
Tectonic Structures ◽  
Middle Ordovician ◽  
Taconic Orogeny ◽  
Gaspe Peninsula ◽  
Axial Surface ◽  
Gaspé Peninsula ◽  
Shape And Size

The earliest tectonic structures recognized in northern and western Gaspé Peninsula are intrafolial, isoclinal folds with an axial-surface schistosity or slaty cleavage closely parallel to bedding. Most of these structures are confined to low-grade metamorphic rocks in the lower part of a Cambro–Ordovician volcanic and flysch succession; locally they affect rocks of a formation that is dated elsewhere as mainly Middle Ordovician. Later folds of variable shape and size, usually with steep axial surfaces, affect all the succession. Both fold sets are reinterpreted to have developed during the Taconic orogeny (mid to late Ordovician).Acadian (mid-Devonian) folds in cover rocks trend closely parallel to those in the Taconic basement, but deformation of the basement was mainly limited to late warping, which formed major anticlinoria and synclinoria that determine the outcrop pattern.

Weather and Outbreaks of the Spruce Budworm in the Province of Quebec from 1939 to 1956

1961 ◽  
Vol 93 (2) ◽  
pp. 118-123 ◽  
Author(s):  
J. G. Pilon ◽  
J. R. Blais
Keyword(s):  
Choristoneura Fumiferana ◽  
Abies Balsamea ◽  
Spruce Budworm ◽  
Balsam Fir ◽  
The Past ◽  
Forest Regions ◽  
Tree Component ◽  
Gaspe Peninsula ◽  
Gaspé Peninsula

Nearly all forest regions in the Province of Quebec where balsam fir (Abies balsamea (L.) Mill.) is an important tree component have been subjected to severe defoliation by the spruce budworm, Choristoneura fumiferana (Clem.), during the past 20 years. These outbreaks have followed an easterly direction beginning near the Ontario-Quebec border in 1939 and ending in the Gaspé Peninsula in 1958.

scholarly journals Reconnaissance P,T studies of Proterozoic crustal evolution of the Ammassalik area, East Greenland

1989 ◽  
Vol 146 ◽  
pp. 48-53
Author(s):  
A.P Nutman ◽  
C.R.L Friend
Keyword(s):  
Regional Metamorphism ◽  
Crustal Thickening ◽  
Mobile Belt ◽  
Crustal Evolution ◽  
Intrusive Complex ◽  
East Greenland ◽  
Early Proterozoic ◽  
Northern Half

The Ammassalik area of East Greenland lies in the centre of a 300 km wide early Proterozoic mobile belt, dominated by Archaean gneisses and early Proterozoic metasediments. Regional Proterozoic synkinematic metamorphism was associated with crustal thickening by southerly-directed thrusting and isoclinal folding. Maximum P, T conditions recorded during the regional metamorphism are found in the northern half of the mobile belt and are 9.5 kbar (equivalent to 30 km burial) and c. 700°C. Following some erosion and uplift, the late kinematic 1885 Ma Ammassalik Intrusive Complex (AIC) was intruded at pressures of c. 7 kbar (equivalent to a depth of 20 km). Temperatures in the metamorphic aureole of the AIC reached 800°C. Following further erosion and uplift, post kinematic, c. 1575 Ma granite-diorite-gabbro complexes were intruded, under pressures of 2.5 kbar (equivalent to a depth of 8 km).

Gaspe Peninsula

1924 ◽  
Vol 14 (2) ◽  
pp. 325
Author(s):  
F. J. Alcock ◽  
J. M. Clarke
Keyword(s):  
Gaspe Peninsula ◽  
Gaspé Peninsula

Copper prospects in Gaspe Peninsula, Quebec

1924 ◽  
Author(s):  
F J Alcock
Keyword(s):  
Gaspe Peninsula ◽  
Gaspé Peninsula
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