scholarly journals The P-T Conditions of Late Stage Diagenesis and Low Grade Metamorphism in the Taconic Belt of the Gaspe Peninsula From Fluid Inclusions: Preliminary Results

1983 ◽  
Author(s):  
S Islam ◽  
R Hesse
Keyword(s):  
Fluid Inclusions ◽  
Late Stage ◽  
Low Grade ◽  
Grade Metamorphism ◽  
Preliminary Results ◽  
Gaspe Peninsula ◽  
Gaspé Peninsula

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.

scholarly journals Diagenetic - Low Grade Metamorphic Trends in the Acadian Belt of Gaspe - Peninsula

1990 ◽  
Author(s):  
R Hesse ◽  
E Dalton
Keyword(s):  
Low Grade ◽  
Gaspe Peninsula ◽  
Gaspé Peninsula

Low-grade metamorphism and accretion tectonics: Southern Uplands terrain, Scotland

1985 ◽  
Vol 49 (352) ◽  
pp. 335-344 ◽  
Author(s):  
A. E. S. Kemp ◽  
G. H. J. Oliver ◽  
J. R. Baldwin
Keyword(s):  
Subduction Zones ◽  
Structural Data ◽  
Low Grade ◽  
Structural Level ◽  
Concomitant Increase ◽  
Illite Crystallinity ◽  
Grade Metamorphism ◽  
Trench Slope ◽  
Reflectance Data ◽  
Trajectory Characteristic

AbstractPrevious studies of low-grade metamorphism in the Southern Uplands accretionary terrain indicated prehnite-pumpellyite facies/anchizone conditions developed throughout the area, except for local preservation of trench-slope sediments and an accreted seamount at zeolite facies/advanced diagenetic grade. New graptolite reflectance data are presented that show a general northward increase in temperature in the Southern Uplands. The results from two cross-strike traverses in the southern and central belts in contemporaneous sequences, using illite crystallinity, illite lateral spacing (bo) , and graptolite reflectance, indicate the development of systematic accretion-related low-grade metamorphism. Well-developed and constant anchizone conditions occur throughout the NE (Langholm) traverse, associated with common, F1 accretion-related folding and a regionally penetrative S1 cleavage. In the SW (Kirkcudbright) traverse, however, the youngest, last accreted packets are preserved at a transitional diagenetic stage and lack a penetrative S1 cleavage. Illite crystallinity, graptolite reflectance, and bo increase systematically northward through earlier accreted packets, reaching values of the NE traverse only at the northern end. The concomitant increase of bo with illite crystallinity suggests the relatively high P-low T trajectory characteristic of subduction zones. Integration of metamorphic and structural data relates increasing intensity of aceretion-related F1 folding, developmertt of S1 fabric, and onset of later fold phases to grade of metamorphism and structural level within the accretionary pile.

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.

Neodymium and strontium isotopic dating of diagenesis and low-grade metamorphism of argillaceous sediments

1994 ◽  
Vol 58 (5) ◽  
pp. 1471-1481 ◽  
Author(s):  
Urs Schaltegger ◽  
Peter Stille ◽  
Naoual Rais ◽  
Alain Piqué ◽  
Norbert Clauer
Keyword(s):  
Low Grade ◽  
Isotopic Dating ◽  
Grade Metamorphism
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