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Yalakom Fault

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Journal Article

Latest Cretaceous to early Tertiary dextral strike-slip faulting on the southeastern Yalakom fault system, southeastern Coast Belt, British Columbia Available to Purchase

Paul J. Umhoefer, Paul Schiarizza
Journal: GSA Bulletin
Published: 01 July 1996
GSA Bulletin (1996) 108 (7): 768–785.
DOI: https://doi.org/10.1130/0016-7606(1996)108<0768:LCTETD>2.3.CO;2
...Paul J. Umhoefer; Paul Schiarizza Abstract The Yalakom fault system cuts the Cadwallader, Bridge River, and Methow terranes for 300 km along the northeast side of the Coast Belt in southwestern British Columbia. The fault system had major dextral slip after middle Cretaceous contractional...
View PDF for article title, Latest Cretaceous to early Tertiary dextral strike-slip <span class="search-highlight">faulting</span> on the southeastern <span class="search-highlight">Yalakom</span> <span class="search-highlight">fault</span> system, southeastern Coast Belt, British Columbia
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Journal Article

Possible pre-Cenozoic left-lateral slip on the Yalakom fault, southwestern British Columbia Available to Purchase

Martin G. Miller
Journal: Geology
Published: 01 July 1988
Geology (1988) 16 (7): 584–587.
DOI: https://doi.org/10.1130/0091-7613(1988)016<0584:PPCLLS>2.3.CO;2
...Martin G. Miller Abstract The Yalakom fault strikes northwest for nearly 250 km in southern British Columbia. Immediately north of the town of Lillooet, between the Yalakom and Fraser faults, structures within Jurassic and Cretaceous clastic rocks suggest that the Yalakom fault had a history...
View PDF for article title, Possible pre-Cenozoic left-lateral slip on the <span class="search-highlight">Yalakom</span> <span class="search-highlight">fault</span>, southwestern British Columbia
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Journal Article

The Jackass Mountain Group of south-central British Columbia: depositional setting and evolution of an Early Cretaceous deltaic complex 1 This article is one of a series of papers published in this Special Issue on the theme of New insights in Cordilleran Intermontane geoscience: reducing exploration risk in the mountain pine beetle-affected area, British Columbia . 2 Earth Science Sector (ESS) Contribution 20100280. Available to Purchase

Catherine I. MacLaurin, J. Brian Mahoney, James W. Haggart, J. Russell Goodin, Peter S. Mustard
Published: 22 June 2011
Canadian Journal of Earth Sciences (2011) 48 (6): 930–951.
DOI: https://doi.org/10.1139/e11-035
... Cordillera. Two Jackass Mountain Group successions, exposed in the Camelsfoot Range and Chilko Lake regions and separated by ∼125 km across the northwest–southeast-trending Yalakom fault, provide details of stratigraphy, sedimentology, petrography, and geochemistry of the group. Restoring dextral movement...
FIGURES | View All (13)
View PDF for article title, The Jackass Mountain Group of south-central British Columbia: depositional setting and evolution of an Early Cretaceous deltaic complex 1 This article is one of a series of papers published in this Special Issue on the theme of New insights in Cordilleran Intermontane geoscience: reducing exploration risk in the mountain pine beetle-affected area, British Columbia . 2 Earth Science Sector (ESS) Contribution 20100280.
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Add to Citation Manager for The Jackass Mountain Group of south-central British Columbia: depositional setting and evolution of an Early Cretaceous deltaic complex 1 This article is one of a series of papers published in this Special Issue on the theme of New insights in Cordilleran Intermontane geoscience: reducing exploration risk in the mountain pine beetle-affected area, British Columbia . 2 Earth Science Sector (ESS) Contribution 20100280.
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Journal Article

Cretaceous sedimentation and tectonics, Tyaughton–Methow Basin, southwestern British Columbia Free

Karen L. Kleinspehn
Published: 01 February 1985
Canadian Journal of Earth Sciences (1985) 22 (2): 154–174.
DOI: https://doi.org/10.1139/e85-014
...Karen L. Kleinspehn Abstract The Mesozoic Tyaughton–Methow Basin straddles the Fraser–Yalakom–Pasayten – Straight Creek (FYPSC) strike-slip fault zone between six tectono-stratigraphic terranes in southwestern British Columbia. Data from Hauterivian–Cenomanian basin fill provide constraints...
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Journal Article

Interpretation of structures in the southeastern Nechako Basin, British Columbia, from seismic reflection, well log, and potential field data 1 This article is one of a series of papers published in this Special Issue on the theme of New insights in Cordilleran Intermontane geoscience: reducing exploration risk in the mountain pine beetle-affected area, British Columbia . 2 Geological Survey of Canada Contribution 20100002. Available to Purchase

Nathan Hayward, Andrew J. Calvert
Published: 30 June 2011
Canadian Journal of Earth Sciences (2011) 48 (6): 1000–1020.
DOI: https://doi.org/10.1139/e11-022
... rocks of >3 km. This structural pattern is consistent with regional observations that suggest the transfer of slip from the Yalakom fault to the north via a series of en echelon strike-slip faults. In the Middle to Late Eocene, faults associated with a change in the direction of stress, echoed...
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View PDF for article title, Interpretation of structures in the southeastern Nechako Basin, British Columbia, from seismic reflection, well log, and potential field data 1 This article is one of a series of papers published in this Special Issue on the theme of New insights in Cordilleran Intermontane geoscience: reducing exploration risk in the mountain pine beetle-affected area, British Columbia . 2 Geological Survey of Canada Contribution 20100002.
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Add to Citation Manager for Interpretation of structures in the southeastern Nechako Basin, British Columbia, from seismic reflection, well log, and potential field data 1 This article is one of a series of papers published in this Special Issue on the theme of New insights in Cordilleran Intermontane geoscience: reducing exploration risk in the mountain pine beetle-affected area, British Columbia . 2 Geological Survey of Canada Contribution 20100002.
Journal Article

The conglomerate of Churn Creek: Late Cretaceous basin evolution along the Insular–Intermontane superterrane boundary, southern British Columbia Available to Purchase

J.W. Riesterer, J. Brian Mahoney, Paul Karl Link
Published: 18 December 2000
Canadian Journal of Earth Sciences (2001) 38 (1): 59–73.
DOI: https://doi.org/10.1139/e00-079
... floor assemblage located to the southwest of Churn Creek, south of the Yalakom fault. Gradationally overlying the lower member throughout much of the basin is a mixed chert, plutonic, and volcaniclastic lithofacies of the upper member. Plutonic debris was provided to the mixed and plutonic lithofacies...
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View PDF for article title, The conglomerate of Churn Creek: Late Cretaceous basin evolution along the Insular–Intermontane superterrane boundary, southern British Columbia
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Journal Article

Contrasting tectono-stratigraphy and structure in the Coast Belt near Chilko Lake, British Columbia: unrelated terranes or an arc – back-arc transect? Free

Paul J. Umhoefer, Margaret E. Rusmore, G. J. Woodsworth
Published: 01 November 1994
Canadian Journal of Earth Sciences (1994) 31 (11): 1700–1713.
DOI: https://doi.org/10.1139/e94-152
... in the west, but only has minor expression in the east. Most of the structures in the east are part of the latest Cretaceous(?) to early Tertiary dextral-strike-slip, Yalakom fault system. These differences were most likely caused by the Late Cretaceous change from nearly orthogonal subduction to a dextral...
Add to Citation Manager for Contrasting tectono-stratigraphy and structure in the Coast Belt near Chilko Lake, British Columbia: unrelated terranes or an arc – back-arc transect?
Journal Article

Metal distribution patterns across the eastern flank of the Coast plutonic complex, South-central British Columbia Available to Purchase

G. J. Woodsworth, D. E. Pearson, A. J. Sinclair
Journal: Economic Geology
Published: 01 April 1977
Economic Geology (1977) 72 (2): 170–183.
DOI: https://doi.org/10.2113/gsecongeo.72.2.170
... events, whereas porphyry molybdenum deposits formed during the Miocene. Principal movements along the Yalakom fault predated mineral deposition in the Bridge River camp. Late Tertiary porphyry molybdenum deposits appear genetically related to Cascade volcanism rather than to plutonism of the Coast...
View PDF for article title, Metal distribution patterns across the eastern flank of the Coast plutonic complex, South-central British Columbia
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Locations of basement samples from Jurassic–Cretaceous batholiths in the Pacific Northwest. Sampling location numbers correspond to Table 2. Alphabetical listing of abbreviations: FSF—Fraser/Straight Creek fault; HLF—Harrison Lake fault; PF—Pasayten fault; YF—Yalakom fault.

Locations of basement samples from Jurassic–Cretaceous batholiths in the Pa... Open Access

Published: 08 November 2021
Figure 2. Locations of basement samples from Jurassic–Cretaceous batholiths in the Pacific Northwest. Sampling location numbers correspond to Table 2 . Alphabetical listing of abbreviations: FSF—Fraser/Straight Creek fault; HLF—Harrison Lake fault; PF—Pasayten fault; YF—Yalakom fault.
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Fig. 1.

Terrane map of the British Columbian Cordillera, showing the location of th... Available to Purchase

Published: 16 November 2015
Fig. 1. Terrane map of the British Columbian Cordillera, showing the location of the Newton Au deposit in the southern Stikinia terrane. Modified from Nelson and Colpron (2007) . FF, Fraser fault; YF, Yalakom fault. [Colour figure available online.]
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General location map showing Mesozoic batholiths and major faults of western North America (after Wheeler et al., 1991; Reed et al., 2005; Ortega-Gutiérrez et al., 2014; Painter et al., 2014). Locations of Figures 2 and 3 are indicated by the unfilled rectangles. Faults, belts, and basins are italicized. Alphabetical listing of abbreviations: FSF—Fraser/Straight Creek fault; HG—Haida Gwaii; HLF—Harrison Lake fault; PF—Pasayten fault; SAF—San Andreas fault; V—Vancouver; VI—Vancouver Island; YF—Yalakom fault.

General location map showing Mesozoic batholiths and major faults of wester... Open Access

Published: 08 November 2021
, belts, and basins are italicized. Alphabetical listing of abbreviations: FSF—Fraser/Straight Creek fault; HG—Haida Gwaii; HLF—Harrison Lake fault; PF—Pasayten fault; SAF—San Andreas fault; V—Vancouver; VI—Vancouver Island; YF—Yalakom fault.
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Reconstruction map and proposed plate tectonic setting at ca. 44–40 Ma based on features in Figures 2 and 3. The ancestral Cascades arc (“Cascadia”) has initiated, scattered basins extend from the western to eastern belts, and magmatism has ended in the North Cascades and almost all of the Challis-Kamloops belt. The Farallon-Pacific ridge is migrating to the northwest relative to North America. Ff—Fraser River fault; LCfz—Lewis and Clark fault zone; Pg—Puget Group; Rb—Roslyn Basin; SCf—Straight Creek fault; Yf—Yalakom fault. States and provinces: BC—British Columbia; ID—Idaho; MT—Montana; OR—Oregon; WA—Washington.

Reconstruction map and proposed plate tectonic setting at ca. 44–40 Ma base... Open Access

Published: 06 July 2023
of the Challis-Kamloops belt. The Farallon-Pacific ridge is migrating to the northwest relative to North America. Ff—Fraser River fault; LCfz—Lewis and Clark fault zone; Pg—Puget Group; Rb—Roslyn Basin; SCf—Straight Creek fault; Yf—Yalakom fault. States and provinces: BC—British Columbia; ID—Idaho; MT—Montana
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Regional geologic framework of the Coast plutonic complex and location of the study area. SR—Shames River fault; EB—Eastern Boundary detachment system; CSZ—Coast shear zone; KF—Kitkatla fault; PLF—Principe-Laredo fault; GCF—Grenville Channel fault; YF—Yalakom fault; TF—Tchaikazan fault; TA—Talchako fault; MW—Mount Waddington map area. Figure is modified from Boghossian and Gehrels (2000); Chardon et al. (1999); Gehrels et al. (2009); Rusmore and Woodsworth (1994); Rusmore et al. (2005); and van der Heyden et al. (1994).

Regional geologic framework of the Coast plutonic complex and location of t... Available to Purchase

Published: 01 July 2013
Figure 1. Regional geologic framework of the Coast plutonic complex and location of the study area. SR—Shames River fault; EB—Eastern Boundary detachment system; CSZ—Coast shear zone; KF—Kitkatla fault; PLF—Principe-Laredo fault; GCF—Grenville Channel fault; YF—Yalakom fault; TF—Tchaikazan fault
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Fig. 1.

Regional geologic map of the southern Canadian Cordillera, showing the dist... Available to Purchase

Published: 22 June 2011
Fig. 1. Regional geologic map of the southern Canadian Cordillera, showing the distribution of terranes and major structural features: YF, Yalakom fault; F-SCF, Straight Creek – Fraser fault system; PF, Pasayten fault; HF, Hozameen fault; RLF, Ross Lake fault. The blue star shows the location
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Map of biotite K-Ar and 40Ar/39Ar cooling ages from Jurassic and Cretaceous batholithic rocks of the Pacific Northwest (see Figs. 2 and 10). Alphabetical listing of abbreviations: B—Boise; FSF—Fraser/Straight Creek fault; H—Helena; HLF—Harrison Lake fault; K—Kelowna; PF—Pasayten fault; V—Vancouver; VI—Vancouver Island; YF—Yalakom fault. For full biotite K-Ar and 40Ar/39Ar age database, see Table S7 (see text footnote 1). Data sources for this figure in addition to this study can be found in Table S8 (text footnote 1).

Map of biotite K-Ar and 40 Ar/ 39 Ar cooling ages from Jurassic and Cretac... Open Access

Published: 08 November 2021
—Pasayten fault; V—Vancouver; VI—Vancouver Island; YF—Yalakom fault. For full biotite K-Ar and 40 Ar/ 39 Ar age database, see Table S7 (see text footnote 1 ). Data sources for this figure in addition to this study can be found in Table S8 (text footnote 1 ).
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A series of paleogeography and tectonic reconstructions for the three formations of the Relay Mountain Group. Maps (A)–(D) are based on a reconstruction of strike-slip faults after Umhoefer and Schiarizza (1996). The paleogeography data are based on the data presented in this study and in the references in Fig. 13. The base maps in (E)–(G) are reconstructed assuming 100% shortening in a 50–230° direction of the base maps in (A)–(D). The grey lines in (E)–(G) are the present latitude and longitude after the two restorations. See text for discussion of the maps. Open circles cities: H, Hope; L, Lillooet; P, Pemberton. Small circles type locations of Relay Mountain Group: PR, Potato Range; RM, Relay Mountain. Faults: Hzf, Hozameen fault; Pf, Pasayten fault; Tchf, Tchaikazan fault; Yf, Yalakom fault. CBTS, major central thrust fault of the Coast Belt thrust system of Journeay and Friedman (1993).

A series of paleogeography and tectonic reconstructions for the three forma... Available to Purchase

Published: 09 August 2002
, Lillooet; P, Pemberton. Small circles type locations of Relay Mountain Group: PR, Potato Range; RM, Relay Mountain. Faults: Hzf, Hozameen fault; Pf, Pasayten fault; Tchf, Tchaikazan fault; Yf, Yalakom fault. CBTS, major central thrust fault of the Coast Belt thrust system of Journeay and Friedman ( 1993 ).
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Generalized tectonic map of Paleogene rock types, structures, and tectonics of the greater Pacific Northwest region considered in this study. Note the location of Siletzia (including subsurface), near-trench intrusions, major dextral strike-slip faults, basins, magmatic rocks, and metamorphic core complexes and bounding normal faults. Western, central, and eastern belts are subdivisions used in text. An—Anaconda core complex; Br—Bitterroot lobe of Idaho batholith; Cb—Chelan block of North Cascades crystalline core; Csz—Coast shear zone; Ef—Entiat fault; Ff—Fraser River fault; K—Kettle core complex; LCfz—Lewis and Clark fault zone; Ok—Okanogan core complex; P—Priest River core complex; Pf—Pasayten fault; RLf—Ross Lake fault; SCf—Straight Creek fault; Sh—Shuswap core complex; V—Valhalla complex; VI—Vancouver Island; Wb—Wenatchee block of North Cascades crystalline core; Yf—Yalakom fault. Box shows location of Figure 3. States and provinces: BC—British Columbia; ID—Idaho; MT—Montana; OR—Oregon; WA—Washington.

Generalized tectonic map of Paleogene rock types, structures, and tectonics... Open Access

Published: 06 July 2023
core complex; LCfz—Lewis and Clark fault zone; Ok—Okanogan core complex; P—Priest River core complex; Pf—Pasayten fault; RLf—Ross Lake fault; SCf—Straight Creek fault; Sh—Shuswap core complex; V—Valhalla complex; VI—Vancouver Island; Wb—Wenatchee block of North Cascades crystalline core; Yf—Yalakom
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(A) Map of the Canadian Cordillera shows heat-flow contours (data from Majorowicz and Grasby, 2010), Holocene volcanic centers (American Geological Institute, 2003), thermal springs (Woodsworth and Woodsworth, 2014), and major faults discussed in this paper. The region considered in this study (black rectangle) lies within the Columbia Mountains of southeastern British Columbia, where there is a heat-flow anomaly and a cluster of thermal springs but no volcanic centers. (B) Detail of major fault segments in southeastern British Columbia considered in this study and key to subsequent figure locations. Fault abbreviations: AF—Adit fault; BF—Beaver River fault; CLF—Champion Lakes fault; CMTF—Cascadia Megathrust fault; CSF—Chatham Strait fault; CSZ—Coast Shear Zone; CRF—Columbia River fault; DF—Denali fault; FSCF—Fraser–Straight Creek fault; HLSZ—Harrison Lake Shear Zone; LSF—Lakeshore fault; NRMTF—Northern Rocky Mountain Trench fault; PF—Pasayten fault; PT—Purcell Thrust; PTF—Purcell Trench fault; QCF—Queen Charlotte fault; RWF—Redwall fault; SRMTF—Southern Rocky Mountain Trench fault; SLF—Slocan Lake fault; TAF—Thompson Albreda fault; TF—Tintina fault; YF—Yalakom fault.

(A) Map of the Canadian Cordillera shows heat-flow contours (data from Maj... Available to Purchase

Published: 29 November 2022
fault; NRMTF—Northern Rocky Mountain Trench fault; PF—Pasayten fault; PT—Purcell Thrust; PTF—Purcell Trench fault; QCF—Queen Charlotte fault; RWF—Redwall fault; SRMTF—Southern Rocky Mountain Trench fault; SLF—Slocan Lake fault; TAF—Thompson Albreda fault; TF—Tintina fault; YF—Yalakom fault.
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(A) Reconstruction map at ca. 51 Ma based on features in Figures 2 and 3. By 51 Ma, the ridge has reached Vancouver Island, and Siletzia has collided with the continental margin. The Swauk Basin has begun to invert, and Challis-Kamloops magmatism is active, as are core complexes and extensional basins in the eastern zone. (B) Proposed plate tectonic setting. Note the position of major faults (both active and nonactive) in gray for reference. Green—Paleocene–Eocene basin; orange—Eocene volcanic rock; pink—metamorphic core complex. An—Anaconda core complex; Br—Bitterroot core complex; Cb—Chelan block of North Cascades crystalline core; Csz—Coast shear zone; Ef—Entiat fault; K—Kettle core complex; LCfz—Lewis and Clark fault zone; Ok—Okanogan core complex; P—Priest River core complex; Pf—Pasayten fault; RLf—Ross Lake fault; Sh—Shuswap core complex; V—Valhalla complex; VI—Vancouver Island; Wb—Wenatchee block of North Cascades crystalline core; Yf—Yalakom fault. States and provinces: BC—British Columbia; CA—California; ID—Idaho; MT—Montana; NV—Nevada; UT—Utah; WA—Washington.

(A) Reconstruction map at ca. 51 Ma based on features in Figures 2 and 3... Open Access

Published: 06 July 2023
; Wb—Wenatchee block of North Cascades crystalline core; Yf—Yalakom fault. States and provinces: BC—British Columbia; CA—California; ID—Idaho; MT—Montana; NV—Nevada; UT—Utah; WA—Washington.
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(A) Simplified geologic map of the Chilcotin Ranges (Tyaughton basin), the regions adjacent to them, and the main exposures of the Relay Mountain Group (mainly taken from Schiarizza et al. 1997, 2001). Large bold numbers are keyed to stratigraphic columns in Fig. 6A. The Relay Mountain and Potato Range areas discussed in this paper are numbered 7 and 2 on the map, respectively. The terrane names in the explanation (A) lie directly above the more detailed stratigraphic columns of each area shown in (B). The Chilcotin Ranges lie along the northeast side of the Coast Mountains defined by the Coast Belt plutons here, and they lie along the southwest side of the Yalakom fault shown here. (B) Names of stratigraphic units and simplified standard patterns for lithologies. Abbreviations on the left in the stratigraphic column: T, Tertiary; K, Cretaceous; J, Jurassic; TR, Triassic; P, Permian; IP, Pennsylvanian; M, Mississippian.

(A) Simplified geologic map of the Chilcotin Ranges (Tyaughton basin), the ... Available to Purchase

Published: 09 August 2002
defined by the Coast Belt plutons here, and they lie along the southwest side of the Yalakom fault shown here. (B) Names of stratigraphic units and simplified standard patterns for lithologies. Abbreviations on the left in the stratigraphic column: T, Tertiary; K, Cretaceous; J, Jurassic; TR, Triassic; P