scholarly journals Nonacho Basin with NTGS to Nova Scotia Cobequid-Chedabucto Fault Zone with TGI-6

2021 ◽  
Author(s):  
E Adlakha
Keyword(s):  
Nova Scotia ◽  
Fault Zone

scholarly journals Dating Hydrothermal Alteration Attending IOCG Mineralization Along a Terrane Bounding Fault Zone: The Copper Lake Deposit, Nova Scotia

10.4138/10090 ◽  
2009 ◽  
Vol 44 (1) ◽  
pp. 146 ◽  
Author(s):  
Daniel. J. Kontak ◽  
Douglas A. Archibald ◽  
Robert A. Creaser ◽  
Larry M. Heaman
Keyword(s):  
Nova Scotia ◽  
Fault Zone ◽  
Hydrothermal Alteration

Anatomy of a terrane boundary: an integrated structural, geographic information system, and remote sensing study of the late Paleozoic Avalon-Meguma terrane boundary, mainland Nova Scotia, Canada

1998 ◽  
Vol 35 (7) ◽  
pp. 787-801 ◽  
Author(s):  
T L Webster ◽  
J B Murphy ◽  
S M Barr
Keyword(s):  
Remote Sensing ◽  
Information System ◽  
Nova Scotia ◽  
Geographic Information System ◽  
Fault Zone ◽  
System Analysis ◽  
Geographic Information ◽  
Radar Images ◽  
Meguma Terrane ◽  
Shaded Relief

Remote sensing and geographic information system analysis complimented by geological mapping have resulted in a new interpretation of the Late Carboniferous evolution of the Avalon-Meguma terrane boundary (known as the Minas Fault Zone) in the Canadian Appalachian Orogen. Various images, including optical, radar, and shaded-relief elevation, have been integrated with magnetic and gravity data to compliment mapping in the vicinity of the exposed terrane boundary in mainland Nova Scotia. Throughout much of the region, the style of deformation is typical of dextral motion along the east-west Chedabucto Fault, the most prominent structure in the Minas Fault Zone. Lineament analysis of the shaded-relief elevation and radar images has identified an important lineament trending east-northeast which corresponds to the axial trace of folds that rotate clockwise into parallelism with the Chedabucto Fault. However, in eastern mainland Nova Scotia, the shaded-relief and geophysical images, together with field data, suggest that the Chedabucto Fault was offset by sinistral motion along the north-northwest-trending Country Harbour Fault. Following this event, the region in the vicinity of this offset became a restraining bend during renewed dextral motion along the Chedabucto Fault, resulting in the formation of a positive flower structure represented by the exposure of Early Devonian volcanic and sedimentary rocks in the Guysborough block. The processes described are probably typical of recurrent motions along terrane boundaries.

scholarly journals Stratigraphic evolution of provenance in a thick conglomerate-dominated Carboniferous succession in the southern Isle Madame area, Nova Scotia, and paleogeographic implications

2014 ◽  
Vol 50 ◽  
pp. 104 ◽  
Author(s):  
Eric Force
Keyword(s):  
Nova Scotia ◽  
Fault Zone ◽  
High Grade ◽  
Crustal Rocks ◽  
Fine Grained ◽  
Drainage Patterns ◽  
Clastic Sediments ◽  
Stratigraphic Position ◽  
Provenance Variations ◽  
Stratigraphic Evolution

  Thick conglomerate-dominated sedimentary successions of the Horton and lower Windsor groups in the southern Isle Madame area show provenance variations with stratigraphic position, based on pebble counts, petrographic observations, and facies trends throughout the conglomeratic units. These coarse clastic sediments were deposited in a transtensional basin that formed south of a splay of the Minas Fault Zone, now repeated by younger faults in the study area. A stratigraphic section 1300 m thick that includes the base of the Horton Group was derived mostly, if not entirely, from units in the Avalonian Mira terrane to the east. Similar provenance indications continue stratigraphically upward in this section and elsewhere on Isle Madame through the thick lower and central parts of the Horton Group. In the upper part of the Horton Group, an influx of high-grade metamorphic and deformed plutonic clasts is recorded in the conglomerates, and the percentage of this material continues to increase above a dark fine-grained interval and into the overlying Windsor Group. The metamorphic clasts strongly resemble local basement rocksexposed as belts between conglomeratic domains in Isle Madame, indicating that these deeper crustal rocks were unroofed within the former basin in the late Tournaisian, resulting in redirected drainage patterns. Paleocurrent and facies information suggest that the Mira terrane sources were located to the northwest at the time of deposition. Hence, paleogeographic reconstruction for the area involves not only unroofing of the deeper crustal rocks, but also dextral transcurrent movement to place the appropriate parts of the Mira terrane at the northwestern corner of exposed parts of the basin. This movement was along a subsequently deformed part of the Minas Fault Zone. 

scholarly journals Controls on Barite Mineralization in a Major Intracontinental Shear Zone: Carboniferous of the Cobequid Highlands, Nova Scotia

Minerals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1413
Author(s):  
Georgia Pe-Piper ◽  
David J. W. Piper
Keyword(s):  
Nova Scotia ◽  
Shear Zone ◽  
Fault Zone ◽  
Isotope Geochemistry ◽  
Common Origin ◽  
Late Carboniferous ◽  
Brittle Deformation ◽  
The South ◽  
History Of ◽  
Fluid Interaction

Prominent veins of late Carboniferous barite, associated with fluorite and calcite, outcrop close to older granite plutons along an intracontinental shear zone that was active throughout the Carboniferous in southeastern Canada. Some barite is stratigraphically constrained to younger than 315 Ma and final mineralization is constrained by a published Rb–Sr isochron of 300 ± 6 Ma. Barite occurrences in the Carboniferous basins of central Nova Scotia, 50 km to the south, are synchronous with or post-date ankerite-siderite-magnetite-pyrolusite and Pb-Zn mineralization, which was facilitated by fluid interaction with thick evaporites. This study aims to determine controls on the distribution of barite in the shear zone, from field relationships, vein petrography and isotope geochemistry of minerals. The isotope chemistry of shear zone barite is similar to that occurring in Pb-Zn-Mn-Ba mineralization to the south, suggesting a common origin. Veins of barite, associated with fluorite, represent the youngest and regionally coolest phase of a 70 Ma history of Carboniferous mineralized veins along the Minas Fault Zone. Their prominence close to granite plutons reflects brittle deformation of the deeply-rooted granites in a complexly deforming fault zone, but the origin of abundant F remains uncertain.

Sense of displacement on the Cobequid–Chedabucto fault system, Nova Scotia, Canada

1987 ◽  
Vol 24 (2) ◽  
pp. 217-223 ◽  
Author(s):  
C. K. Mawer ◽  
J. C. White
Keyword(s):  
Nova Scotia ◽  
Fault Zone ◽  
Shear Bands ◽  
Fault System ◽  
Progressive Development ◽  
The North ◽  
Ductile Shearing ◽  
History Of ◽  
Appalachian Orogen ◽  
Meguma Terrane

The Cobequid–Chedabucto fault system of the Canadian Appalachians is a major anastomosing fault system over 300 km in length. It separates the Meguma Terrane of southern Nova Scotia from the Avalon Terrane to the north. These terranes are distinct tectonic and lithological entities in the Appalachian Orogen. Two areas at either end of this fault system have been examined in detail to determine the sense and history of offset along it. Both areas are situated on major component fault zones of the system, and both exhibit structures due to early intense ductile shearing that are overprinted by semi-brittle to brittle structures caused by later faulting. Along the eastern Chedabucto fault zone (area A), ductile structures were examined. This area is characterized by the progressive development of S–C textures and shear bands, rotated syntectonic porphyroblasts, and asymmetric minor folds, features indicative of and caused by ductile shearing. Along the western Cobequid fault zone (area B), semi-brittle and brittle structures were studied. A distinctive asymmetric geometrical package of faults, self-similar at a variety of scales, is developed throughout this part of the fault system. Ductile and brittle displacement sense (kinematic) indicators at both sites indicate a protracted history of dextral strike-slip movement. No evidence was observed for major sinistral movement.

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