Electrically anisotropic structure of the Rocky Mountain Trench near Valemount, British Columbia inferred from magnetotellurics: implications for geothermal exploration
Canadian Journal of Earth Sciences
by Benjamin Lee, Martyn Unsworth, Theron Finley, Wenxin Kong, Darcy Cordell
1w ago
Canadian Journal of Earth Sciences, Ahead of Print. Canoe Reach is a region of high geothermal potential on a segment of the Southern Rocky Mountain Trench fault (SRMTF) with highly metamorphosed and structurally complex wall rocks, near Valemount, British Columbia. This study contains analyses of magnetotelluric data collected at Canoe Reach accounting for electrical anisotropy, which is not often considered during geothermal exploration. Isotropic and anisotropic 3D inversions are used due to signs of electrical anisotropy in the Canoe Reach magnetotelluric data and the presence of visibly a ..read more
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Geochemistry, geochronology, and radiogenic isotopes of the Balmer and Confederation assemblages of the Laird Lake Area, Red Lake greenstone belt, Canada: implications for Archean tectonic evolution
Canadian Journal of Earth Sciences
by Brigitte R. Gélinas, Pete Hollings, Richard Friedman
3w ago
Canadian Journal of Earth Sciences, Ahead of Print. The Laird Lake property, southwest Red Lake greenstone belt, straddles the contact between the Balmer (2.99–2.96 Ga) and the Confederation (2.74–2.73 Ga) assemblages. The property is 10 km along strike from the Madsen and Starrat–Olsen Au mines that are hosted near the contact. The Balmer assemblage consists of fine-grained, aphyric, locally pillowed mafic volcanic rocks, ultramafic intrusive and volcanic rocks with flow breccia textures hosting local spinifex-bearing clasts, and banded-iron formations. In contrast, the Confederation assembla ..read more
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Description of a tetrapod trackway from the early Carboniferous Bonaventure Formation of New Brunswick, Canada
Canadian Journal of Earth Sciences
by Louis-Philippe Bateman, Richard Cloutier, Hans C.E. Larsson
3w ago
Canadian Journal of Earth Sciences, Ahead of Print. The Bonaventure Formation is an early Carboniferous fossil-bearing rock unit that crops out in northern New Brunswick and eastern Quebec, eastern Canada. Here, we describe CMNFV 10013, a tetrapod trackway found in Bonaventure Formation outcrops on Heron Island, New Brunswick, by Robert Wheelock Ells in 1879. The specimen shows at least seven prints including two pes–manus couples, one of which is sufficiently well preserved to be attributable to Hylopus isp. Several underprints significantly depart from typical Hylopus tracks and emphasise th ..read more
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Líl̓wat oral traditions of Qw̓elqw̓elústen (Mount Meager): Indigenous records of volcanic eruption, outburst flood, and landscape change in southwest British Columbia
Canadian Journal of Earth Sciences
by Michael C. Wilson, Bill Angelbeck, Johnny Jones / Yaqalatqa7
3w ago
Canadian Journal of Earth Sciences, Ahead of Print. Indigenous oral traditions of the Líl̓wat Nation recount observations of Qw̓elqw̓elústen (Mount Meager), a Garibaldi Volcanic Belt volcano in southwestern British Columbia, Canada; and associated eruptive activity, mass-wasting, and outburst flooding. We present Líl̓wat observations relating to Qw̓elqw̓elústen’s ∼2360 cal year B.P. eruption and its aftermath, a devastating outburst flood down the Lillooet valley. The Copper Canoe story correlates with the event sequence of pyroclastic damming of the Lillooet River and an outburst flood t ..read more
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An ankylosaur femur from the mid-Cretaceous of the peace region of northeastern British Columbia
Canadian Journal of Earth Sciences
by Emily G. Cross, Victoria M. Arbour
1M ago
Canadian Journal of Earth Sciences, Ahead of Print. Dinosaur skeletal material from the mid-Cretaceous of Canada is rare; however, the Cenomanian-aged Dunvegan Formation of northeastern British Columbia and northwestern Alberta is rich with ichnofossils attributed to nodosaurid ankylosaurs. A long bone (Hudson's Hope Museum specimen HH 2017.010.002) collected in 1993 from the Murray River of northeastern British Columbia is identified here as an ankylosaur femur. Femoral measurements of the bone plotted against femoral measurements of major dinosaur clades, combined with observations on femora ..read more
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Origin of a glacially influenced shallow marine chromite placer, Port au Port Bay, western Newfoundland, Canada
Canadian Journal of Earth Sciences
by Mehmet Duyan, Nick Eyles
1M ago
Canadian Journal of Earth Sciences, Ahead of Print. Detrital chromite is currently accumulating in the wave-influenced gravel-dominated shoreface of eastern Port au Port Bay of western Newfoundland adjacent to the mouth of Fox Island River. Chromium (Cr) concentrations of up to 7485 ppm occur in modern cross-bedded shallow marine gravel and pebbly sand facies sourced from rapidly eroding coastal cliffs cut in a lateglacial and early postglacial fan delta and raised beach facies. These sediments fill a broad coastal embayment and were deposited by a glacially influenced Fox Island River du ..read more
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Present-day kinematics of the northwest Moroccan Atlantic Margin from GNSS data: west southwest extrusion at the western end of the High Atlas
Canadian Journal of Earth Sciences
by Khalid Lakhouidsi, Abdelali Fadil, Abdelilah Tahayt, Abderrahmane Soulaimani
1M ago
Canadian Journal of Earth Sciences, Ahead of Print. The Global Navigation Satellite System (GNSS) has emerged as a practical and effective technique for studying slow and steady geodynamic movements, enabling continuous monitoring and precise quantification of deformation over different timescales. In Morocco, a network of GNSS stations has been established, offering valuable insights into tectonic processes. This paper focuses on investigating the geodynamic motion of the northwest Moroccan Atlantic Margin. By utilizing GNSS data, subsidence rates and horizontal velocity fields were determine ..read more
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Sedimentary characteristics, lithofacies, and paleogeography of the Middle–Lower Cambrian in the Tarim Basin, NW China
Canadian Journal of Earth Sciences
by Tianyu Ji, Wei Yang, Xueqiong Wu, Dejiang Li, Mancang Liu, Chengpeng Song, Xi Chen
1M ago
Canadian Journal of Earth Sciences, Ahead of Print. The Cambrian pre-salt dolomite sequence in the Tarim Basin is a target zone of great strategic significance for hydrocarbon exploration in the basin. Using the results of the interpretation of 3D seismic data from Lunnan and 2D seismic data covering the whole basin, and based on a synthesis of outcrop data, drilling data, well logs, core data, and thin-section data, and the findings from previous studies, this paper studies the characteristics of the facies of the Middle–Lower Cambrian in the platform area in the Tarim Basin, the formation an ..read more
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LA-ICP-MS zircon U–Pb ages, geochemistry, and genesis of Paleozoic granites from Biezhentao Mountain, Western Tianshan, Xinjiang
Canadian Journal of Earth Sciences
by Xiang Li, Fang Xia, Ling-Ling Gao, Chuan Chen, Xiao-Fei Du, Shun-Da Li
1M ago
Canadian Journal of Earth Sciences, Volume 61, Issue 4, Page 505-523, April 2024. The geologic history of the Western Tianshan region is important for understanding the evolution of the Central Asian Orogenic Belt and accretionary orogenesis. Paleozoic and Mesozoic igneous rocks are present along the northern margin of the Yili Block; however, studies of Paleozoic subduction and collisional events have been relatively limited. Published geochronologies of Middle Devonian magmatic rocks in this region are also lacking. Therefore, this study analyzed the zircon U–Pb ages and major and trace elem ..read more
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Net evolution of subglacial sediment transport in the Quebec–Labrador sector of the Laurentide Ice Sheet
Canadian Journal of Earth Sciences
by Jessey M. Rice, Martin Ross, Heather E. Campbell, Roger C. Paulen, M. Beth McClenaghan
3M ago
Canadian Journal of Earth Sciences, Ahead of Print. The Laurentide Ice Sheet's (LIS) interior had a dynamic polythermal base, but the spatiotemporal variations of subglacial processes related to ice divide migration and other transient changes remain largely unknown, limiting our understanding of regional glacial dynamics. Previous studies focused on the regional glacial landform record, while ice sheet models lacked detailed parameterization within these regions, leading to an overestimation of cold-based subglacial conditions' extent and duration. In this study, glacial sediment dispersal pa ..read more
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