Regional Geology of the McLeod Lake map area, British Columbia

Struik, L C

doi:10.4095/127458

Cited by 1 publication

(5 citation statements)

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“…MR. Mesilinka River. Fuller 1988;Taite 1989;Struik 1989Struik , 1990; Deville and Struik 1990;Struik and Northcote 1991) has confirmed that the northerly trending McLeod Lake fault system truncates the northwest-trending faults parallel to the Southern Rocky Mountain Trench as indicated by Muller and Tipper (1969) (Fig. 3).…”

Section: Introductionsupporting

confidence: 68%

“…1). These en echelon faults, namely the TintinaNorthern Rocky Mountain Trench -McLeod Lake Fault (Roddick 1967;Muller and Tipper 1969;Eisbacher 1985;Gabrielse 1985;Struik 1985b;Mansy 1986;Struik and Fuller 1988), the Pinchi Fault (Armstrong 1949;Paterson 1973Paterson , 1977Struik 1989), and the Fraser -Straight Creek Fault (Duffel and McTaggart 1952;Misch 1966;Tipper 1978;Kleinspehn 1985;Monger 1985;Coleman and Parrish 1990), appear to approximately parallel each other along concentric arcs, characteristic of transform plate boundaries (Price and Carmichael 1986). …”

Section: Regional Fault Geometry and Timingmentioning

confidence: 95%

“…Recent mapping by the Geological Survey of Canada in central British Columbia has added new kinematic and age constraints to several of these regional strike-slip and extension faults (Struik 1985a(Struik , 1985b(Struik , 1989Struik and Fuller 1988;Taite 1989;Deville and Struik 1990;Struik and Northcote 1991). In central British Columbia, regional strike-slip faults occupy a narrow zone between the Rocky Mountain Trench westward to the Pinchi Fault (Fig.…”

Section: Introductionmentioning

confidence: 97%

“…The rocks of these assemblages are described for the Pine Pass and McLeod Lake map areas in Struik (1989Struik ( , 1990Struik ( , 1992 and Struik and Northcote (1991). tain, Cassiar, McGregor, and Rockies assemblages (Struik 1990;Struik and Northcote 1991;Struik 1992).…”

Section: Introductionmentioning

confidence: 99%

“…3). Both the younger northerly and the older northwesterly trending faults have structures indicative of dextral strike-slip motion (Struik 1989;Taite 1989 Three of the western assemblages consist mainly of late Paleozoic through to Early Jurassic rift, trench, and arc basalt, diorite, gabbro, limestone, greywacke, and chert and are called Slide Mountain, Cache Creek, and Takla. Slide Mountain assemblage is here represented by the Slide Mountain Group of Slide Mountain Terrane.…”

Section: Introductionmentioning

confidence: 99%

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Intersecting intracontinental Tertiary transform fault systems in the North American Cordillera

Struik¹

1993

Can. J. Earth Sci.

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In central British Columbia, north-trending dextral strike-slip faults that cut Late Eocene granite also truncate northwesttrending dextral strike-slip faults. The northwest-trending strike-slip faults bound the Wolverine Metamorphic Complex (Wolverine Complex), which has been uplifted primarily by northwest-southeast Eocene crustal extension and somewhat by Late Eocene northerly extension. The crustal extension is indicated by shallow-dipping extensions faults, dyke complexes, and stretching lineations. The Wolverine Complex and its bounding faults define a crustal pull-apart in an en echelon dextral transform. The northwest-and north-trending dextral strike-slip faults in central British Columbia are the continuations of faults that transect the interior of the North American Cordillera, and they represent at least two distinct plate boundaries intermittently active during the Early to Middle Eocene, and the Late Eocene to Early Oligocene. Each of these systems consists of en echelon strike-slip faults linked by extensional pull-aparts, locally represented by metamorphic core complexes. These two plate-boundary systems represent two distinct plate-motion configurations between the North American and Kula-Pacific plates. The older plate boundary is truncated and disrupted by the younger one. These two systems may in turn be disrupted by a younger and different plate-motion configuration represented by the transverse Basin and Range extension complex and its northern and southern transform boundary faults.Les failles coulissantes dextres, de direction nord, dans le centre de la Colombie-Britannique, qui coupent les massifs de granite d'bge Cockne tardif, tronquent aussi les failles coulissantes dextres qui sont orientkes nord-ouest. Les failles coulissantes de direction nord-ouest encadrent le Complexe mktamorphique de Wolverine (Complexe de Wolverine), principalement souleve A 1'Eocbne par une extension crustale nord-ouest -sud-est, et partiellement A 1'Eocbne tardif par une extension vers le nord. Les failles de dktachement, les complexes filoniens et les lineations d'ktirement sont les tCmoins de I'extension crustale. Le Complexe de Wolverine et ses failles bordikres definissent un bassin transtension crustal, dCveloppC dans une faille transformante dextre en tchelons. Dans le centre de la Colombie-Britannique, les failles coulissantes dextres de direction nord-ouest et nord representent le prolongement des failles qui transectent I'intCrieur de la Cordillbre de 1'AmCrigue du Nord, et elles indique~t au moins deux bordures distinctes de plaques qui furent Lpisodiquement actives durant 1'Eockne moyen i precoce, et 1'Eockne tardif i I'Oligockne precoce. Chacun de ces systkmes comprend de failles coulissantes en CcheIons relites par des bassins de transtension extensifs, et localement ils correspondent h des noyaux de massifs mktamorphiques. Ces deux systbmes de bordures de plaques reprtsentent deux modes distincts de mouvements entre les plaques de 1'AmCrique du Nord et de Kula -Pacifique. La plus ancienne des b...

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