Fabric Variation in the Lubec–Belleisle Zone of Southern New Brunswick

1973 ◽  
Vol 10 (11) ◽  
pp. 1591-1599 ◽  
Author(s):  
John A. Garnett ◽  
Richard L. Brown
Keyword(s):  
New Brunswick ◽  
Middle Devonian ◽  
Finite Strain ◽  
Horizontal Displacement ◽  
Strike Slip ◽  
Finite Strains ◽  
Structural Fabric ◽  
Major Strike

Variations in structural fabric adjacent to part of the Lubec–Belleisle fault are interpreted in terms of a single protracted heterogeneous strain. Zones of shallow and intermediate pitch of lineation in steep to vertical surfaces occur between a region of steeply pitching lineations and a region of unstrained rock. Finite strain in the zone of steeply pitching lineations is greater than in the intermediate or shallow pitching zones. The variation in magnitude and orientation of the finite strains is probably due to a buttressing effect of adjacent unstrained granitic rocks.The fabric zones formed in Middle Devonian times, and predate brittle movement of the Lubec–Belleisle fault. Since the zones do not display appreciable horizontal displacement, the possibility of major strike-slip movements along this fault must be ruled out.

Possible earthquake-induced soft-sediment faulting and remobilization in Pennsylvanian alluvial strata, southern New Brunswick, Canada

1985 ◽  
Vol 22 (6) ◽  
pp. 907-912 ◽  
Author(s):  
A. G. Plint
Keyword(s):  
New Brunswick ◽  
Lake Sediments ◽  
Strike Slip ◽  
Soft Sediment ◽  
Braided River ◽  
The North ◽  
Playa Lake ◽  
Different Depths ◽  
Major Strike ◽  
Strike Slip Movement

Braided river, sheetflood, and playa lake sediments of the Tynemouth Creek Formation (Lower Pennsylvanian) show superficial synsedimentary faulting and subsurface post-depositional sediment remobilization. A prominent palaeosol has been offset 90 cm on two faults, movement on which clearly preceded deposition of the overlying beds. Seventeen to 25 m below this horizon, large load structures, upward-branching siltstone intrusions, and three types of sandstone dike are recognised. Intrusion occurred on several occasions at different depths of burial and was the result of rapid, probably earthquake-induced dewatering. This interpretation is supported by the location of the study area, only a few kilometres to the north of the Cobequid–Chedabucto Fault, on which major strike-slip movement occurred during the Pennsylvanian.

The Catamaran Fault, North-Central New Brunswick

1972 ◽  
Vol 9 (10) ◽  
pp. 1278-1286 ◽  
Author(s):  
F. D. Anderson
Keyword(s):  
New Brunswick ◽  
Compressive Stress ◽  
Middle Devonian ◽  
Fracture Analysis ◽  
Strike Slip ◽  
Maritime Provinces ◽  
North Central ◽  
The Core ◽  
Principal Compressive Stress ◽  
Metamorphic Core

The Catamaran Fault cuts pre-Carboniferous rocks of the Miramichi Geanticline in north-central New Brunswick. It has been examined for about 60 miles (100 km) across the intrusive and metamorphic core of the geanticline and into the Siluro-Devonian flank rocks. The fault strikes easterly in the core and northeasterly in the flanks.Where displacement could be determined movement on the fault is mainly right lateral strike-slip. There is no evidence for major dip-slip. Fracture analysis indicates that faulting was in response to a northwest-southeast trending principal compressive stress similar to that deduced for other faults in the Maritime Provinces. Latest movement along the fault was post-Middle Devonian (i.e. post-dates the emplacement of the Acadian granite) and pre-Pennsylvanian.The Catamaran Fault may extend eastward along a fault possibly underlying Miramichi Bay and continuing under the Gulf of St. Lawrence, and westward along a southwesterly trending fault in western New Brunswick. As such the Catamaran Fault may exceed 250 miles (400 km) in length.

Acadian strike-slip tectonics in the Gaspé region, Quebec Appalachians

1989 ◽  
Vol 26 (9) ◽  
pp. 1764-1777 ◽  
Author(s):  
Michel Malo ◽  
Jacques Béland
Keyword(s):  
Middle Devonian ◽  
High Strain ◽  
Structural Features ◽  
Fault Zones ◽  
Strike Slip ◽  
Structural Units ◽  
Middle Ordovician ◽  
Southern Margin ◽  
Intense Deformation ◽  
Dextral Strike Slip

At the southern margin of the Cambro-Ordovician Humber Zone in the Quebec Appalachians, on Gaspé Peninsula, three structural units of Middle Ordovician to Middle Devonian cover rocks of the Gaspé Belt are in large part bounded by long, straight longitudinal faults. In one of these units, the Aroostook–Percé anticlinorium, several structural features, which can be ascribed to Acadian deformation, are controlled by three subparallel, dextral, strike-slip longitudinal faults: Grande Rivière, Grand Pabos, and Rivière Garin. These faults follow bands of intense deformation, contrasting with the mildly to moderately deformed intervals that separate them.Most of the structural features observed – rotated oblique folds and cleavage, subsidiary Riedel and tension faults, and offsets of markers – can be integrated in a model of strike-slip tectonics that operated in ductile–brittle conditions. A late increment of deformation in the form of conjugate cleavages and minor faults is restricted to the bands of high strain. An anticlockwise transection of the synfolding cleavage in relation to the oblique hinges may be a feature of the rotational deformation.The combined dextral strike slip that can be measured within the three major longitudinal fault zones amounts to 138 km, to which can be added 17 km of ductile movement in the intervals, for a total of 155 km.

scholarly journals Stress sensitivity of fault seismicity: A comparison between limited-offset oblique and major strike-slip faults

1999 ◽  
Vol 104 (B9) ◽  
pp. 20183-20202 ◽  
Author(s):  
Tom Parsons ◽  
Ross S. Stein ◽  
Robert W. Simpson ◽  
Paul A. Reasenberg
Keyword(s):  
Stress Sensitivity ◽  
Strike Slip ◽  
Major Strike

PETROLEUM GEOLOGY OF WESTERN NEW SOUTH WALES

1977 ◽  
Vol 17 (1) ◽  
pp. 42 ◽  
Author(s):  
P. R. Evans
Keyword(s):  
Middle Devonian ◽  
New South ◽  
New South Wales ◽  
Early Carboniferous ◽  
Strike Slip ◽  
Petroleum Potential ◽  
Shallow Marine ◽  
Marine Deposits ◽  
South Wales ◽  
Petroleum Generation

The only area of Western New South Wales considered to have petroleum potential is the intracratonic, fault-bounded Darling Basin, which evolved during Late Silurian to Early Carboniferous time and which contains up to 7000 m of sediments. Initially deposition was controlled by a shallow marine transgression from the east. Regression during the Middle Devonian was followed by basin-wide extension of alluvial sedimentation, which prevailed until the Early Carboniferous. Strike slip movements during Late Devonian time along old basement trends fragmented the basin into distinct troughs. Movements along the same trends during the Carboniferous modified the troughs' configuration. Permian, Mesozoic and Cenozoic sag-like downwarps in various parts of the region had negligible effect on bedding attitudes.The only play of the Basin thought to have a chance for significant petroleum generation and entrapment lies in the Lower and (?) Middle Devonian, where marginal marine deposits flank highs created by strike slip movements. This play is regarded as one of high risk for modest returns, but its continued exploration seems warranted in view of proximity to markets and to the Moomba-Sydney pipeline.

Lateral P-Velocity Gradients near Major Strike-Slip Faults in California

Science ◽  
1981 ◽  
Vol 213 (4504) ◽  
pp. 207-209 ◽  
Author(s):  
D. J. STIERMAN ◽  
S. O. ZAPPE
Keyword(s):  
Strike Slip ◽  
Velocity Gradients ◽  
Major Strike
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