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Articles de revues sur le sujet « Schiste de (Canada) »

Auteur : Grafiati

Publié le 25 juillet 2024

Mis à jour le 31 juillet 2025

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1

Petrie, Meredith Blair, Jane A. Gilotti, William C. McClelland, Cees Van Staal, and Sierra J. Isard. "Geologic Setting of Eclogite-facies Assemblages in the St. Cyr Klippe, Yukon–Tanana Terrane, Yukon, Canada." Geoscience Canada 42, no. 3 (2015): 327. http://dx.doi.org/10.12789/geocanj.2015.42.073.

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The St. Cyr area near Quiet Lake hosts well preserved to variably retrogressed eclogite found as sub-metre to hundreds of metre-long lenses within quartzofeldspathic schist in south-central Yukon, Canada. The St. Cyr klippe consists of structurally imbricated, polydeformed and polymetamorphosed units of continental arc crust and ultramafic–mafic rocks. Eclogite-bearing quartzofeldspathic schist forms thrust slices in a 30 km long by 6 km wide, northwest-striking outcrop belt. The schist unit comprises metasedimentary and felsic intrusive rocks that are intercalated on the metre to tens of metr

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KRETZ, R. "A garnet population in Yellowknife schist, Canada." Journal of Metamorphic Geology 11, no. 1 (1993): 101–20. http://dx.doi.org/10.1111/j.1525-1314.1993.tb00134.x.

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Seppälä, Matti. "Rock pingos in northern Ungava Peninsula, Quebec, Canada." Canadian Journal of Earth Sciences 25, no. 4 (1988): 629–34. http://dx.doi.org/10.1139/e88-060.

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The author reports the first pingos found in Ungava Peninsula, Quebec. The pingos, 15–30 m high, are open-system rock pingos built of very fractured schist and hornblende gabbro. At the time of observation, water was draining out of their slopes. Peat from the top of the smaller pingo was dated at 2880 ± 100 years BP.

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Erdmer, Philippe, Larry Heaman, Robert A. Creaser, Robert I. Thompson, and Ken L. Daughtry. "Eocambrian granite clasts in southern British Columbia shed light on Cordilleran hinterland crust." Canadian Journal of Earth Sciences 38, no. 7 (2001): 1007–16. http://dx.doi.org/10.1139/e01-005.

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The Spa Creek assemblage is a distinctive thin pericratonic succession that crosses the Okanagan Valley in the hinterland of the southern Cordilleran Orogen in Canada. The succession was ductilely deformed and metamorphosed before deposition of overlying Triassic dark metaclastic strata. A metaconglomerate within the succession, locally composed of more than 90% biotite granite clasts, yielded five fractions of euhedral zircon that define a precise UPb upper intercept of 555.6 ± 2.5 Ma, inferred to be the age of a nearby pluton. Other clasts in the metaconglomerate are generally more abundant

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RUTHERFORD, G. K., and D. J. THACKER. "CHARACTERISTICS OF TWO MAFIC SAPROLITES AND THEIR ASSOCIATED SOIL PROFILES IN CANADA." Canadian Journal of Soil Science 68, no. 2 (1988): 223–31. http://dx.doi.org/10.4141/cjss88-022.

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Two soil profiles developed from mafic saprolites were examined at Economy Mountain, Nova Scotia and Kamloops, British Colombia. The underlying rocks, a tholeiitic basalt in Nova Scotia and a basic greenstone schist at Kamloops, were apparently transformed to predominantly smectitic saprolites in pre-Holocene times. During the Wisconsinan glacial stage the sola and a significant portion of the saprolites were removed. Holocene pedogenesis has produced new sola on the saprolites. In Nova Scotia, the solum may have some locally derived till or colluvium component. Key words: Mafic pedogenesis, P

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Jattiot, Romain, Nathalie Coquel-Poussy, Isabelle Kruta, Isabelle Rouget, Alison J. Rowe, and Jean-David Moreau. "The first gladius-bearing coleoid cephalopods from the lower Toarcian “Schistes Cartons” Formation of the Causses Basin (southeastern France)." PeerJ 12 (February 26, 2024): e16894. http://dx.doi.org/10.7717/peerj.16894.

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The fossil record of gladius-bearing coleoids is scarce and based only on a few localities with geological horizons particularly favourable to their preservation (the so-called Konservat-Lagerstätten), which naturally leads to strongly limited data on geographical distributions. This emphasizes the importance of every new locality providing gladius-bearing coleoids. Here, we assess for the first time the gladius-bearing coleoid taxonomic diversity within the lower Toarcian “Schistes Cartons” of the Causses Basin (southeastern France). The material includes two fragmentary gladii, identified as

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Minter, D. W., and P. F. Cannon. "Myriospora scabrida . [Descriptions of Fungi and Bacteria]." Descriptions of Fungi and Bacteria 227 (January 2021): 2265. http://dx.doi.org/10.1079/dfb/20210391610.

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Abstract A description is provided for Myriospora scabrida , a lichen-forming species occurring on various rock types, particularly sandstone, often but not exclusively associated with heavy metal deposits in old mine spoil heaps and on worked stone. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (Tunisia, Greenland, Norway, Afghanistan, Iran, Russia, Austria, Bosnia-Hercegovina, Czech Republic, Finland, France, Germany, Iceland, Irish Republic, Italy, Norway, Russia, Spain, Sweden, Ukraine, UK, Canada (N

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Pan, Yuanming, Michael E. Fleet, and Neil D. Macrae. "Oriented monazite inclusions in apatite porphyroblasts from the Hemlo gold deposit, Ontario, Canada." Mineralogical Magazine 57, no. 389 (1993): 697–707. http://dx.doi.org/10.1180/minmag.1993.057.389.14.

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AbstractOriented inclusions of monazite occur in the dark core of apatite porphyroblasts in a muscovite schist from the Archaean Hemlo gold deposit, Ontario, Canada. The monazite inclusions are elongated along the b-axis and parallel to the c-axis of the apatite host; the complete orientation relationship of the monazite/apatite intergrowth is bMnz//cAp, cMnz//aAp. From analysis by SIMS and EMP, the dark core of the apatite porphyroblasts is depleted in LREE (LaN/YbN = 0.56). The monazite inclusions are correspondingly enriched in LREE, but markedly depleted in HREE, compared with monazite gra

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Charan, S. N., S. M. Naqvi, and S. L. Ramesh. "Geology and Geochemistry of Spinifex-Textured Peridotitic Komatiite from Mayasandra Schist Belt, Karnataka." Journal Geological Society of India 32, no. 4 (1988): 343–50. http://dx.doi.org/10.17491/jgsi/1988/320407.

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Abstract Spinifex-textured peridotitic komatiite occurs on the southeastern margin of Mayasandra schist belt near Nagamangala in Karnataka. Preservation of spinifex-texture made up of pseudomorphically altered phenocrysts of olivine and less commonly clinopyroxene set in a groundrnass of skeletal augite and devitrified glass in the komatiite, is essentially perfect in spite of alteration, deformation and metamorphism. Petrography shows dissimilar shapes and dimensions of the crystals, with more than one pattern of crystal arrangement in the texturally layered komatiite, clearly indicating that

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Srikantia, S. V., and S. S. Bose. "Archaean Komatiites from Banasandra Area of Kibbanahalli Arm Of Chitradurga Supracrustal Belt in Karnataka." Journal Geological Society of India 26, no. 6 (1985): 407–17. http://dx.doi.org/10.17491/jgsi/1985/260605.

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Abstract The Banasandra Komatiites occur within the Kibbanahalli arm of the Chitradurga supracrustal Belt in Karnataka. They apparently overlie the Bababudan Group and the Peninsular Gneiss and occur in two isolated exposures, (i) east of Birasandra, and (ii) near Kodihalli - Kunikenahalli. Ultramafic rock types include pillowed serpentinites, spinifex-textured komatiite, massive and schistose serpentinite and talc-tremolite-chlorite schist. Certain quartz-antigorite (birbirite ?), quartz-amphibole, and high-magnesian chlorite rocks are also closely associated with the ultramafics. The major e

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Kretz, R. "THE MORPHOLOGY AND GROWTH OF GARNET, (Fe0.74Mg0.13Mn0.09Ca0.04)3Al2Si3O12, IN ARCHEAN SCHIST NEAR YELLOWKNIFE, NORTHWEST TERRITORIES, CANADA." Canadian Mineralogist 48, no. 3 (2010): 537–48. http://dx.doi.org/10.3749/canmin.48.3.537.

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Kretz, R., R. Hartree, and P. Jones. "Metasomatic crystallization of muscovite in granite and tourmaline in schist related to pegmatite emplacement near Yellowknife, Canada." Contributions to Mineralogy and Petrology 102, no. 2 (1989): 191–204. http://dx.doi.org/10.1007/bf00375340.

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Percival, John A. "A regional perspective of the Quetico metasedimentary belt, Superior Province, Canada." Canadian Journal of Earth Sciences 26, no. 4 (1989): 677–93. http://dx.doi.org/10.1139/e89-058.

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Alternating greenstone–granite and metasedimentary gneiss belts are a first-order tectonic feature of the southern Superior Province. The tectonic development of the Quetico metasedimentary belt is reviewed with regard to depositional, structural, and metamorphic–plutonic history. Over its 1200 km length, the belt consists of marginal metasedimentary schists of turbiditic origin and interior metasedimentary migmatite and peraluminous leucogranite. Polyphase deformation has resulted in a steep easterly-striking foliation and regional, gently east-plunging stretching lineation. Metamorphic grade

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Marquis, P., C. Hubert, A. C. Brown, and D. M. Rigg. "Overprinting of early, redistributed Fe and Pb–Zn mineralization by late-stage Au–Ag–Cu deposition at the Dumagami mine, Bousquet district, Abitibi, Quebec." Canadian Journal of Earth Sciences 27, no. 12 (1990): 1651–71. http://dx.doi.org/10.1139/e90-174.

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The Dumagami Au–Ag–Cu deposits are hosted by strongly deformed and altered Archean felsic metavolcanites of the Blake River Group (BRG), southern Abitibi greenstone belt, Canada. Textural and structural features recorded within the lithologies of the BRG at Dumagami indicate that two stages of hydrothermal alteration, separated by a dynamometamorphic event, have affected the volcanic protoliths in the deposit area. Advanced argillic and sericitic alteration zones, massive pyrite bodies, and massive sphalerite–galena bodies resulted from the first stage of hydrothermal activity. Sericitic shell

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Adoze, U. J., F. Abubakar, G. D. Ochu, O. A. Danga, M. L. Adamu, and Y. Baba. "Geological and geochemical analyses of pegmatites in Egbe, Isanlu (sheet 225), Southwestern Nigeria." Scientia Africana 23, no. 2 (2024): 188–206. http://dx.doi.org/10.4314/sa.v23i2.17.

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The hitherto pegmatite of the Egbe area has been known to bear valuable economic minerals. They are associated with other rock types including banded gneiss, schist, amphibolite, and granites. These pegmatites and the host rocks were studied in detail to elucidate their petrochemical and geochemical features and also to assess the mineralization of Tantalum- iobium and other minerals. Geological field mapping was done, thin section-petrographic analysis of ten representative rock samples was performed and nineteen whole-rock samples were analyzed for major and trace elements including REES aid

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Schetselaar, Ernst, and Pejman Shamsipour. "Interpretation of borehole gravity data of the Lalor volcanogenic massive sulfide deposit, Snow Lake, Manitoba, Canada." Interpretation 3, no. 3 (2015): T145—T154. http://dx.doi.org/10.1190/int-2014-0188.1.

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We have acquired borehole gravity data along five drillholes intersecting the Lalor volcanogenic massive sulfide deposit hosted in the eastern Flin Flon greenstone belt at Snow Lake, Manitoba, Canada. Inverted apparent interval density (IAID) logs were calculated from the borehole gravity data and compared with lithofacies and [Formula: see text] logs; the latter of which is a geochemical proxy for differentiating volcanic rocks of felsic to mafic composition. The IAID anomalies predominantly reflect alternating mafic and felsic volcanic rock units in the footwall and hanging wall of the massi

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Dusel-Bacon, Cynthia, and Kari M. Cooper. "Trace-element geochemistry of metabasaltic rocks from the Yukon-Tanana Upland and implications for the origin of tectonic assemblages in east-central Alaska." Canadian Journal of Earth Sciences 36, no. 10 (1999): 1671–95. http://dx.doi.org/10.1139/e99-077.

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We present major- and trace- element geochemical data for 27 amphibolites and six greenstones from three structural packages in the Yukon-Tanana Upland of east-central Alaska: the Lake George assemblage (LG) of Devono-Mississippian augen gneiss, quartz-mica schist, quartzite, and amphibolite; the Taylor Mountain assemblage (TM) of mafic schist and gneiss, marble, quartzite, and metachert; and the Seventymile terrane of greenstone, serpentinized peridotite, and Mississippian to Late Triassic metasedimentary rocks. Most LG amphibolites have relatively high Nb, TiO2, Zr, and light rare earth elem

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Stern, R. A., N. Machado, E. C. Syme, S. B. Lucas, and J. David. "Chronology of crustal growth and recycling in the Paleoproterozoic Amisk collage (Flin Flon Belt), Trans-Hudson Orogen, Canada." Canadian Journal of Earth Sciences 36, no. 11 (1999): 1807–27. http://dx.doi.org/10.1139/e99-028.

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U-Pb zircon ages have been compiled for magmatic and sedimentary rocks from the low metamorphic grade portion of the Flin Flon greenstone belt, now recognized as a Paleoproterozoic tectonic collage. The "Amisk collage" formed in two major magmatic periods that were separated by an interval of intraoceanic accretionary tectonics. Pre-accretionary volcanic and plutonic rocks of arc and ocean-floor tectonic affinities have crystallization ages of 1.906-1.901 and 1.888-1.881 Ga; the earlier period was dominated by juvenile tholeiitic arc basalts and related back-arc-basin basalts, and the younger

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Pascal, Marjolaine, Marie-Christine Boiron, Kevin Ansdell, et al. "Fluids preserved in variably altered graphitic pelitic schists in the Dufferin Lake Zone, south-central Athabasca Basin, Canada: implications for graphite loss and uranium deposition." Mineralium Deposita 51, no. 5 (2015): 619–36. http://dx.doi.org/10.1007/s00126-015-0628-6.

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Moynihan, D. P., and D. R. M. Pattison. "An automated method for the calculation of P-T paths from garnet zoning, with application to metapelitic schist from the Kootenay Arc, British Columbia, Canada." Journal of Metamorphic Geology 31, no. 5 (2013): 525–48. http://dx.doi.org/10.1111/jmg.12032.

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S´áenz-Romero, Cuauhtémoc, Lorena F. Ruiz-Talonia, Jean Beaulieu, Nahum M. Sánchez-Vargas, and Gerald E. Rehfeldt. "GENETIC VARIATION AMONG Pinus patula POPULATIONS ALONG AN ALTITUDINAL GRADIENT. TWO ENVIRONMENT NURSERY TESTS." Revista Fitotecnia Mexicana 34, no. 1 (2011): 19. http://dx.doi.org/10.35196/rfm.2011.1.19.

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Aiming to determine if there is genetic differentiation among Pinus patula Schiede et Chamizo populations along an altitudinal gradient and for quantifying the genotype x environment interaction, 13 Pinus patula populations were sampled from forests of the Native Indian Community of Ixtlán de Juárez, Oaxaca, state of México, along an altitudinal gradient (2400 m to 3000 m), cones being collected on groups of trees on every 50 m of altitudinal step). Seedlings were grown in tree pots in two different environments: a shadehouse located at Ixtlán de Juárez, and in a greenhouse and then in a shade

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Mezger, Jochen E., Robert A. Creaser, Philippe Erdmer, and Stephen T. Johnston. "A Cretaceous back-arc basin in the Coast Belt of the northern Canadian Cordillera: evidence from geochemical and neodymium isotope characteristics of the Kluane metamorphic assemblage, southwest Yukon." Canadian Journal of Earth Sciences 38, no. 1 (2001): 91–103. http://dx.doi.org/10.1139/e00-076.

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The Coast Belt of the northern Cordillera in Canada is the locus of the boundary between accreted and ancient North American margin rocks. The largest exposure of metasedimentary rocks in the Coast Belt is the Kluane metamorphic assemblage (KMA), a northwest-striking belt 160 km long of graphitic micaquartz schist and gneiss with minor interfoliated olivine serpentinite. The KMA does not appear to correlate with other sedimentary or metamorphic rock assemblages in the Canadian Cordillera. To determine its tectonic setting and protolith provenance, we analyzed trace element, rare earth element

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Pascal, Marjolaine, Marie-Christine Boiron, Kevin Ansdell, et al. "Erratum to: Fluids preserved in variably altered graphitic pelitic schists in the Dufferin Lake Zone, south-central Athabasca Basin, Canada: implications for graphite loss and uranium deposition." Mineralium Deposita 51, no. 5 (2016): 637. http://dx.doi.org/10.1007/s00126-016-0651-2.

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Mueller, Andreas G., Neal J. McNaughton, and Janet R. Muhling. "Albite ± Actinolite-Altered Porphyry Dykes in Archean Gold Deposits of the Boulder Lefroy-Golden Mile Fault System, Yilgarn Craton, Western Australia: Petrography, Chronology, and Comparison to Canadian Albitites." Minerals 11, no. 11 (2021): 1288. http://dx.doi.org/10.3390/min11111288.

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The Boulder Lefroy-Golden Mile fault system in the Archean Yigarn Craton is the most productive gold-mineralized structure in Australia (>2300 t Au). The New Celebration deposit (51 t Au) is part of a group of hematite- and anhydrite-bearing mesothermal deposits and Fe-Cu-Au skarns associated with monzodiorite-tonalite intrusions in the strike-slip fault system. Ore-grade biotite-carbonate and late sericite-carbonate-alkali feldspar replacement is bound to the contacts of a felsic (low Cr, Ni, V) quartz-plagioclase porphyry dyke dated at 2676 ± 7 Ma. The sodic-potassic alteration of the fel

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Couëslan, Chris G. "Affinity and Petrogenesis of the Huzyk Creek Metal-Enriched Graphite Deposit: A Metamorphosed Metalliferous Black Shale in the Trans-Hudson Orogen Of Manitoba, Canada." Canadian Mineralogist 60, no. 6 (2022): 853–80. http://dx.doi.org/10.3749/canmin.2100001.

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ABSTRACT The Huzyk Creek area is situated along the boundary between the Reindeer Zone and the Superior Boundary Zone of the Paleoproterozoic Trans-Hudson Orogen, where the Precambrian rocks are overlain by Phanerozoic cover. Two drill holes intersect graphite schist that is enriched in V, as well as U, Zn, Mo, and Cu, and is hosted by a metamorphosed wacke-mudstone sequence interleaved with variably altered mafic rocks. Whole-rock lithogeochemistry and Sm-Nd isotope chemistry suggest that the wacke-mudstone package is related to the turbidite-derived Burntwood Group of the Kisseynew Domain an

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Artemenko, G. V., L. V. Shumlyanskyy, and L. S. Dovbysh. "Th e age of detrital zircon from metasedimentary rocks of the Ternuvate strata (West Azov block of the Ukrainian Shield)." Reports of the National Academy of Sciences of Ukraine, no. 3 (July 11, 2023): 49–59. http://dx.doi.org/10.15407/dopovidi2023.03.049.

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The Ternuvate strata comprise metamorphic rocks that make up the Haichur arcuate structure, which is about 72 km long. Its western part lies within the Andriivka fault zone, which separates the Vovcha and Huliaipole blocks, while the eastern part is located within the Ternuvate fault zone, traced on the Remivka block. The rocks composing the Haichur structure have irregular and laterally variable composition, changeable thickness, and exhibit dynamometamorphic structures of boudinage and schistosity. The upper part of the Ternuvate strata mainly consists of metasedimentary rocks, including gne

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Parkinson, Dave. "Age and isotopic character of Early Proterozoic basement gneisses in the southern Monashee Complex, southeastern British Columbia." Canadian Journal of Earth Sciences 28, no. 8 (1991): 1159–68. http://dx.doi.org/10.1139/e91-106.

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The southern Monashee Complex is a fault-bounded exposure of upper-amphibolite-grade basement gneisses (core gneisses) and unconformably overlying mantling metasedimentary gneisses. The eastern margin is marked by the Early Eocene ductile to brittle Columbia River fault zone; the western and southern margins are marked by the Monashee Decollement and structurally higher Selkirk allochthon.The basement gneisses are exposed in the cores of large, northeast-verging nappes that subsequently have been overprinted towards the east by the Columbia River fault zone. The basement gneisses are a supracr

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Kovacs, Nikolett, Murray M. Allan, James L. Crowley, et al. "Carmacks Copper Cu-Au-Ag Deposit: Mineralization and Postore Migmatization of a Stikine Arc Porphyry Copper System in Yukon, Canada." Economic Geology 115, no. 7 (2020): 1413–42. http://dx.doi.org/10.5382/econgeo.4756.

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Abstract Late Triassic to Early Jurassic porphyry Cu mineralization is common in British Columbia, yet there are few age-equivalent porphyry occurrences in Yukon. This study presents new data for the enigmatic Carmacks Copper Cu-Au-Ag deposit in south-central Yukon, Canada, which is hosted in amphibolite facies metamorphic inliers within the Early Jurassic Granite Mountain batholith. Sulfide mineralization occurs mainly as net-textured bornite and chalcopyrite in leucosome, and as chalcopyrite ± pyrite blebs and disseminations in amphibolite and quartz-plagioclase-biotite schist. Several studi

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Artemenko, G. V., L. V. Shumlyanskyy, and L. S. Dovbysh. "THE AGE OF ZIRCON FROM METASEDIMENTARY ROCKS OF THE TERNUVATE STRATA (WEST AZOV BLOCK OF THE UKRAINIAN SHIELD)." Mineralogical Journal 45, no. 3 (2023): 51–59. http://dx.doi.org/10.15407/mineraljournal.45.03.051.

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In the West Azov the Ternuvate strata comprises metamorphic rocks that builds up the Haichur arcuate structure, which is about 72 km long. Its western part lies within the Andriivka fault zone, which separates the Vovcha and Huliaipole blocks, while the eastern part is located within the Ternuvate fault zone, which is traced on the Remivka block. The rocks composing the Haichur structure have irregular and laterally variable composition and changeable thickness, and show dynamometamorphic structures of boudinage and schistosity. The upper part of the Ternuvate strata is composed mainly of meta

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Geiger, Charles A., and George R. Rossman. "Micro- and nano-size hydrogarnet clusters in calcium silicate garnet: Part II. Mineralogical, petrological, and geochemical aspects." American Mineralogist 105, no. 4 (2020): 468–78. http://dx.doi.org/10.2138/am-2020-7257.

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Abstract The nominally anhydrous, calcium-silicate garnets, grossular (Ca3Al2Si3O12), andradite (Ca3Fe23+Si3O12), schorlomite (Ca3Ti24+[Si,Fe23+]O12), and their solid solutions can incorporate structural OH-, often termed “water.” The IR single-crystal spectra of several calcium silicate garnets were recorded between 3000 and 4000 cm–1. Spectroscopic results are also taken from the literature. All spectra show various OH- stretching modes between 3500 and 3700 cm–1 and they are analyzed. Following the conclusions of Part I of this study, the garnets appear to contain local microscopic- and nan

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Armstrong, Richard Lee, Randall R. Parrish, Peter van der Heyden, Krista Scott, Dita Runkle, and Richard L. Brown. "Early Proterozoic basement exposures in the southern Canadian Cordillera: core gneiss of Frenchman Cap, Unit I of the Grand Forks Gneiss, and the Vaseaux Formation." Canadian Journal of Earth Sciences 28, no. 8 (1991): 1169–201. http://dx.doi.org/10.1139/e91-107.

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The protolith age of high-grade metamorphic rocks exposed in structurally deep parts of the Omineca Crystalline Belt has been the subject of investigation and controversy for decades. We have applied multiple isotopic dating techniques to rocks of three structural culminations: the Monashee complex (which includes the Frenchman Cap and Thor–Odin gneiss domes), the Grand Forks horst, and the Vaseaux Formation, which lies in the footwall of the Okanagan Valley fault.Frenchman Cap core gneisses contain highly radiogenic Sr that scatters about a 2206 ± 117 Ma (1σ) Rb–Sr isochron with 87Sr/86Sr ini

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Crous, P.W., E.R. Osieck, R.G. Shivas, et al. "Fungal Planet description sheets: 1478-1549." Persoonia 50 (June 29, 2023): 158–310. https://doi.org/10.3767/persoonia.2023.50.05.

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Novel species of fungi described in this study include those from various countries as follows: <strong>Australia</strong>, <em>Aschersonia mackerrasiae</em> on whitefly,<em> Cladosporium corticola</em> on bark of<em> Melaleuca quinquenervia</em>,<em> Penicillium nudgee</em> from soil under<em> Melaleuca quinquenervia</em>,<em> Pseudocercospora blackwoodiae</em> on leaf spot of<em> Persoonia falcata</em>, and<em> Pseudocercospora dalyelliae</em> on leaf spot of<em> Senna alata</em>.<strong> Bolivia</strong>,<em> Aspicilia lutzoniana</em> on fully submersed siliceous schist in high-mountain str

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Côté, Charles-Emmanuel. "Investissement." Canadian Yearbook of International Law/Annuaire canadien de droit international, October 23, 2023, 1–24. http://dx.doi.org/10.1017/cyl.2023.10.

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L’année 2022 est marquée par l’accélération de l’apurement du contentieux d’investissement visant le Canada sur le fondement de l’Accord de libre-échange nord-américain entre le gouvernement du Canada, le gouvernement des États-Unis et le gouvernement du Mexique (ALÉNA).1 Pas moins de quatre affaires connaissent leur dénouement avec des sentences arbitrales qui rejettent toutes les réclamations des investisseurs américains, dont une sentence très attendue dans l’affaire Lone Pine Resources c Canada,2 concernant l’interdiction par le Québec du gaz de schiste. Avec la fin en 2023 du régime trans

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Gagnon, Christiane, and Majella-J. Gauthier. "Inventaire et vulnérabilité territoriale des basses terres du Saint-Laurent (Québec, Canada) face au projet d’exploitation des gaz de schiste." IdeAs, no. 8 (December 13, 2016). http://dx.doi.org/10.4000/ideas.1764.

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Kośmińska, Karolina, Jane A. Gilotti, William C. McClelland, Matthew A. Coble, and Jay B. Thomas. "P–T–t Path of Unusual Garnet-Kyanite-Staurolite-Amphibole Schists, Ellesmere Island, Canada – Quartz Inclusion in Garnet barometry and Monazite Petrochronology." Journal of Petrology, July 26, 2022. http://dx.doi.org/10.1093/petrology/egac068.

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Abstract Garnet-kyanite-staurolite assemblages with large, late porphyroblasts of amphibole form garbenschists in Ordovician volcaniclastic rocks lying immediately south of the Pearya terrane on northernmost Ellesmere Island, Canada. The schist, which together with carbonate olistoliths makes up the Petersen Bay Assemblage, displays a series of parallel isograds that mark an increase in metamorphic grade over a distance of 10 km towards the contact with Pearya; however, a steep, brittle Cenozoic strike-slip fault with an unknown amount displacement disturbs the earlier accretionary relationshi

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McKenzie, Will F., Brendan Dyck, H. Daniel Gibson, and Kyle Larson. "A record of Late Cretaceous to early Paleogene Insular terrane accretion within the northern Cordillera: Insights from monazite petrochronology across the Kluane Schist, southwest Yukon, Canada." Geological Society of America Bulletin, February 8, 2024. http://dx.doi.org/10.1130/b37198.1.

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The Kluane Schist is a metamorphosed package of siliciclastic and lesser calcareous rocks that lies between the inboard pericratonic Intermontane terranes and outboard Insular terranes of the North American Cordillera within Yukon, Canada. The metamorphic sequence of the Kluane Schist preserves a record of the tectono-thermal evolution and timing of Insular terrane accretion. Here we document the timing of metamorphism and deformation across the Kluane Schist using in situ laser ablation−inductively coupled plasma−mass spectrometry U-Th-Pb monazite petrochronology. Monazite-bearing samples col

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Minter, D. W., and P. F. Cannon. "Gyalidea roseola . [Descriptions of Fungi and Bacteria]." IMI Descriptions of Fungi and Bacteria, October 10, 2021, Sheet 2264. http://dx.doi.org/10.1079/dfb/20210391609.

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A description is provided for Gyalidea roseola, a lichen-forming fungus occurring on rock in natural and undisturbed environments and also on mining spoil. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (Austria, Finland, Italy, Sweden, UK and Canada (British Columbia)) and associated organisms and substrata (lead mining spoil, rock (calcareous, schist, siliceous), soil and Cystococcus- or Leptosira-like photobionts).

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Belley, Philippe M., Ofure C. Onodenalore, and Wouter Bleeker. "Corundum in Sulfide Ore at the Thompson Mine, Manitoba, Canada: An Unusual Occurrence of Cr- and Ni-Bearing Corundum." Canadian Journal of Mineralogy and Petrology, May 30, 2024. http://dx.doi.org/10.3749/2300017.

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ABSTRACT A novel type of corundum host environment is described from the Thompson Mine, northern Manitoba, where corundum occurs within a high-grade metamorphic reaction zone between boudinaged metaperidotite bodies, sulfide ore, and Al-rich pelitic schist of the Pipe Formation (Ospwagan Group). Zoned corundum porphyroblasts, up to 20 mm across, contain coevally formed sulfide inclusions, zircon, rutile, abundant exsolved rutile needles, and secondary sulfide inclusions formed within fractures. Retrograde alteration products of corundum include greenish muscovite (in contact with the schist) a

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Mills, Andrea J., Greg R. Dunning, and Hamish A. Sandeman. "Lithogeochemical, isotopic, and U–Pb (zircon) age constraints on arc to rift magmatism, northwestern and central Avalon Terrane, Newfoundland, Canada: implications for local lithostratigraphy." Canadian Journal of Earth Sciences, December 23, 2020, 1–23. http://dx.doi.org/10.1139/cjes-2019-0196.

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The northwestern Avalon Terrane, Newfoundland, is underlain by Neoproterozoic rocks traditionally divided into older Love Cove Group, medial Connecting Point Group, and the unconformably overlying Musgravetown Group. New lithogeochemical, isotopic, and updated U–Pb (zircon) age data demand changes to stratigraphic nomenclature and maps and help constrain the tectonomagmatic evolution. U–Pb age constraints include 620 ± 2 Ma for the calc-alkaline Broad Island Group (former Love Cove Group); 605 ± 1.2 Ma for rhyolite from near Bull Arm (type area, Bull Arm Formation, lower Musgravetown Group); 5

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Ketchum, John W. F., Wouter Bleeker, Hendrik Falck, and Valerie A. Jackson. "The Yellowknife greenstone belt and underlying Central Slave Cover Group, Slave craton, Canada: constraints and questions arising from a U-Pb dating study." Canadian Journal of Earth Sciences, May 29, 2024. http://dx.doi.org/10.1139/cjes-2024-0028.

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Legacy U-Pb isotopic data are reported for the Mesoarchean Central Slave Cover Group and Neoarchean Yellowknife greenstone belt, Slave craton, Northwest Territories, Canada. In two locations north of the City of Yellowknife, exposures of cover group rocks occur beneath mafic volcanic and subvolcanic units traditionally assigned to the basal Chan Formation of the Kam Group. Both cover group occurrences contain felsic volcanic tuff units that yield eruption ages of 2853 +2/-1.5 Ma and 2826 ± 1.5 Ma. The younger tuff is underlain by felsic volcaniclastic schist with a dominant, basement-aged detr

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Crous, P. W., E. R. Osieck, R. G. Shivas, et al. "Fungal Planet description sheets: 1478–1549." Persoonia - Molecular Phylogeny and Evolution of Fungi, 2023. http://dx.doi.org/10.3767/persoonia.2023.50.05.

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Novel species of fungi described in this study include those from various countries as follows: Australia, Aschersonia mackerrasiae on whitefly, Cladosporium corticola on bark of Melaleuca quinquenervia, Penicillium nudgee from soil under Melaleuca quinquenervia, Pseudocercospora blackwoodiae on leaf spot of Persoonia falcata, and Pseudocercospora dalyelliae on leaf spot of Senna alata. Bolivia, Aspicilia lutzoniana on fully submersed siliceous schist in high-mountain streams, and Niesslia parviseta on the lower part and apothecial discs of Erioderma barbellatum on a twig. Brazil, Cyathus bons

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