Abstracts
Abstract
The Coldbrook Group is a unique suite of late Ediacaran volcanic and epiclastic rocks deposited in an extensional setting in the Avalonian Caledonia terrane of southern New Brunswick. It is informally divided into a lower part composed of mainly andesitic to dacitic tuffs and epiclastic sedimentary rocks intruded by bimodal plutons, and an upper part composed mainly of mafic flows and tuffs interlayered with but mainly overlain by rhyolitic flows and tuffs and minor epiclastic sedimentary rocks. Recent U–Pb (zircon) dating of four formations in the Coldbrook Group and a subvolcanic granitic dome led to the proposal that the lower and most of the upper Coldbrook Group and associated plutons were formed within <760 kyr at about 551.5 Ma whereas the uppermost rhyolite (Fundy Trail Parkway rhyolite) and underlying basalt of the Hosford Brook Formation formed in a younger event at about 549.5 Ma. Overlapping dates and chemical data also suggest that the subvolcanic granitic domes are the plutonic counterparts of the ca. 551.5 Ma felsic volcanic rocks whereas the other granitic plutons represent extracted melts that evolved separately. Whole-rock geochemical and isotopic data combined with previous field work and map information and integrated with the geochronological data provide new insights into the genesis of these magmas and their change from intermediate to bimodal magmatism. The data indicate that the volcanic and plutonic rocks are mainly tholeiitic and were derived from varying proportions of juvenile melts and recycled older arc lithosphere. The mafic rocks have chemical similarities to flood basalts which inherited some calc-alkalic signatures from older arc-like rocks. Intermediate magmas that formed much of the lower Coldbrook Group had larger lithospheric inputs and thus have mainly calc-alkalic signatures. The Vernon Mountain, Blackall Lake and Silver Hill area rhyolites represent evolved melts derived from the lower Coldbrook Group magmas, and their chemical differences are interpreted to result from melt extraction and solid-liquid dripping magmatic processes. Enhanced extension and thinning led to formation of less lithosphere-contaminated melts that formed the ca. 549.5 Ma bimodal units of the upper Coldbrook Group.
Résumé
Le groupe de Coldbrook est une succession de roches volcaniques et épiclastiques de l’Édiacarien tardif qui se sont déposées à l’intérieur d’un milieu de distension dans le terrane avalonien de Caledonia dans le sud du Nouveau-Brunswick. Le groupe est officieusement divisé en une section inférieure composée de tufs principalement andésitiques à dacitiques et de roches sédimentaires épiclastiques pénétrés par des plutons bimodaux, et en une section supérieure essentiellement constituée de tufs et de coulées mafiques interstratifiées avec des tufs et des coulées rhyolitiques ainsi qu’une quantité modeste de roches sédimentaires épiclastiques qui, toutefois, les recouvre principalement. Une datation U–Pb (sur zircon) des quatre formations dans le groupe de Coldbrook et d’un pluton granitique subvolcanique a abouti à la proposition que la section inférieure et la majeure partie de la section supérieure du groupe de Coldbrook et les plutons associés se sont formés il y a moins de 760 milliers d’années, soit il y a environ 551,5 Ma, alors que la rhyolite sommitale (rhyolite de la Promenade du Sentier Fundy) et le basalte sous-jacent de la Formation de Hosford Brook se sont formés au cours d’un épisode plus récent il y a environ 549,5 Ma. Les dates qui se chevauchent et les données chimiques permettent par ailleurs de supposer que les intrusions granitiques subvolcaniques constituent les équivalents plutoniques des roches volcanofelsiques d’il y a environ 551,5 Ma tandis que les plutons granitiques représentent des magmas extraits ayant évolué séparément. Des données isotopiques et géochmiques de roche totale combinées à de l’information cartographique et de l’information émanant de travaux sur le terrain antérieurs intégrées aux données chronologiques livrent de nouveaux renseignements sur la genèse de ces magmas et leur transformation d’un magmatisme intermédiaire à bimodal. Les données révèlent que les roches volcaniques et plutoniques sont principalement tholéiitiques et qu’elles sont provenues de proportions variables de magmas juvéniles et de la lithosphère d’un arc âgé recyclé. Les roches mafiques ont des similarités chimiques avec les basaltes de plateau et les signatures calco-alcalines héritées des roches d’arc volcanique âgées. Les magmas intermédiaires qui constituent la section inférieure du groupe de Coldbrook ont bénéficié d’afflux lithosphériques plus substantiels et affichent en conséquence des signatures essentiellement calco-alcalines. Les rhyolites des secteurs du mont Vernon, du lac Blackall et de la colline Silver représentent des magmas provenant de magmas de la section inférieure du groupe de Coldbrook et leurs différences chimiques sont interprétées comme un résultat des processus magmatiques de stillation solide-liquide et d’extraction de magma. L’extension et l’amincissement accrus ont entraîné la formation de magmas moins contaminés par la lithosphère qui ont créé les unités bimodales il y a environ 549,5 Ma dans la section supérieure du groupe de Coldbrook.
Appendices
Bibliography
- Acocella, V., Funiciello, R., Marotta, E., Orsi, G., and de Vita, S. 2004. The role of extensional structures on experimental calderas and resurgence. Journal of Volcanology and Geothermal Research, 129, pp. 199–217. https://doi.org/10.1016/S0377-0273(03)00240-3
- Aguirre-Díaz, G.J., Tristán-González, M., Gutiérrez-Palomares, I., Martí, J., López-Martínez, M., Labarthe-Hernández, G., and Nieto-Obregón, J. 2021. Graben type calderas: The Bolaños case, Sierra Madre Occidental, Mexico. Journal of Volcanology and Geothermal Research, 417, 107315. https://doi.org/10.1016/j.jvolgeores.2021.107315
- Álvaro, J.J., Johnson, S.C., Barr, S.M., Jensen, S., Palacios, T., Van Rooyen, D., and White, C.E. 2023. Unconformity-bounded rift sequences in Terreneuvian–Miaolingian strata of the Caledonian Highlands, Atlantic Canada. Geological Society of America Bulletin, 135, pp. 1225–1242. https://doi.org/10.1130/B36402.1
- Aribowo, S. 2018. The geometry of pull-apart basins in the southern part of Sumatran strike-slip fault zone. IOP Conference Series: Earth and Environmental Science, 118, 012002. https://doi.org/10.1088/1755-1315/118/1/012002
- Bachmann, O. and Bergantz, G.W. 2004. On the origin of crystal-poor rhyolites extracted from batholithic crystal mushes. Journal of Petrology, 45, pp. 1565–1582. https://doi.org/10.1093/petrology/egh019
- Barr, S.M. and White, C.E. 1999a. Field relations, petrology, and structure of Neoproterozoic rocks in the Caledonia Highlands, southern New Brunswick, Canada. Geological Survey of Canada Bulletin, 530, 101 p. https://doi.org/10.4095/210354
- Barr, S.M. and White, C.E. 1999b. Geological map of the Caledonia Highlands, southern New Brunswick, Canada. Geological Survey of Canada Open File 3615, 4 sheets, scale 1:50 000.
- Barr, S.M. and White, C.E. 2004. Bedrock geology of the Caledonian Highlands of southern New Brunswick. New Brunswick Department of Natural Resources, Minerals, Policy and Planning Divisions, Plate 2004-138, scale 1:100 000.
- Barr, S.M., Bevier, M.L., White, C.E., and Doig, R. 1994. Magmatic history of the Avalon terrane of southern New Brunswick, Canada, based on U–Pb (zircon) geochronology. Journal of Geology 102, pp. 399–409. https://doi.org/10.1086/629682
- Barr, S.M., Hamilton, M.A., White, C.E., and Samson, S.D. 2000. A Late Neoproterozoic age for the Caledonia Mountain Pluton, a high Ti-V layered gabbro in the Caledonia (Avalon) terrane, southern New Brunswick. Atlantic Geology, 36, pp. 157–166. https://doi.org/10.4138/2018
- Barr, S.M., Johnson, S.C., van Rooyen, D., White, C.E., and Park, A.F. 2019. U–Pb (zircon) dating in the Caledonia Highlands, southern New Brunswick – progress report. New Brunswick Energy and Resource Department, Information Circular 2019-1, pp. 10–14.
- Barr, S.M., Johnson, S.C., Dunning, G.R., White, C.E., Park, A.F., Walle, M., and Langille, A. 2020. New Cryogenian, Neoproterozoic, and mid-Paleozoic U–Pb zircon ages from the Caledonia terrane, southern New Brunswick: Better constrained but more complex volcanic stratigraphy. Atlantic Geology, 56, pp. 163–187. https://doi.org/10.4138/atlgeol.2020.007
- Barr, S.M., Johnson, S.C., van Rooyen, D., Escribano, A.P., Crowley, J.L., and White, C.E. 2023. U–Pb (zircon) dating in the Caledonia Highlands, southern New Brunswick-An update. In Geological Investigations in New Brunswick. Edited by E. Smith. New Brunswick Department of Natural Resources and Energy Development; New Brunswick Geological Survey, Geoscience Report 2023-1, pp. 1–29.
- Bea, F. 1996. Residence of REE, Y, Th and U in granites and crustal protoliths; Implications for the chemistry of crustal melts. Journal of Petrology, 37, pp. 521–552. https://doi.org/10.1093/petrology/37.3.521
- Beranek, L. P., Hutter, A.D., Pearcey, S., James, C., Langor, V., Pike, C., Goudie, D., and Oldham, L. 2023. New evidence for the Baltican cratonic affinity and Tonian to Ediacaran tectonic evolution of West Avalonia in the Avalon Peninsula, Newfoundland, Canada. Precambrian Research, 390, 107046. https://doi.org/10.1016/j.precamres.2023.107046
- Bevier, M.L. and Barr, S.M. 1990. U–Pb age constraints on the stratigraphy and tectonic history of the Avalon terrane, New Brunswick, Canada. Journal of Geology, 98, pp. 53–63. https://doi.org/10.1086/629374
- Bruand, E., Fowler, M., Storey, C., Laurent, O., Antoine, C., Guitreau, M., Heilimo, E., and Nebel, O. 2020. Accessory mineral constraints on crustal evolution: elemental fingerprints for magma discrimination. Geochemical Perspectives Letters, 13, pp. 7–12. https://doi.org/10.7185/geochemlet.2006
- Camp, V.E. 2013. Origin of Columbia River Basalt: Passive rise of shallow mantle, or active upwelling of a deep-mantle plume? In The Columbia River Flood Basalt Province. Edited by S.P. Reidel, V.E. Camp, M.E. Ross, J.A. Wolff, B.S. Martin, T.L. Tolan, and R.E. Wells. Geological Society of America Special Paper, 497, pp. 181–199. https://doi.org/10.1130/2013.2497(07)
- Collins, W.J., Beams, D., White, J.R., and Chappell, B.W. 1982. Nature and origin of A-type granites with particular reference to southeastern Australia. Contributions to Mineralogy and Petrology, 80, pp. 189–200. https://doi.org/10.1007/BF00374895
- Currie, K.L. and Eby, G.N. 1990. Geology and geochemistry of the Late Precambrian Coldbrook Group near Saint John, New Brunswick. Canadian Journal of Earth Sciences, 27, pp. 1418–1430. https://doi.org/10.1139/e90-151
- Dessimoz, M., Müntener, O., and Ulmer, P. 2012. A case for hornblende-dominated fractionation of arc magmas: the Chelan Complex (Washington Cascades). Contributions to Mineralogy and Petrology, 163, pp. 567–589. https://doi.org/10.1007/s00410-011-0685-5
- Dostal, J. and McCutcheon, S.R. 1990. Geochemistry of Late Proterozoic basaltic rocks from southeastern New Brunswick, Canada. Precambrian Research, 47, pp. 83–98. https://doi.org/10.1016/0301-9268(90)90032-L
- Eby, G.N. and Currie, K.L. 1996. Geochemistry of the granitoid plutons of the Brookville terrane, Saint John, New Brunswick, and implications for development of the Avalon Zone. Atlantic Geology, 32, pp. 247–268. https://doi.org/10.4138/2090
- Escribano, A.P. 2021. Petrology and age of felsic volcanic rocks of the Coldbrook Group and associated granitic plutons, Caledonia terrane, southern New Brunswick, Canada. Unpublished M.Sc. thesis, Acadia University, Wolfville, Nova Scotia, 263 p.
- Escribano, A.P., Barr, S.M., and Crowley, J.L. 2023. Precise U–Pb zircon dates from silicic super-eruptions during late Ediacaran extension in the Avalonian Caledonia terrane of southern New Brunswick, Canada. Canadian Journal of Earth Sciences, 60, pp. 442–462. https://doi.org/10.1139/cjes-2022-0100
- Grammatikopoulos, A.L. 1992. Petrogenesis, age, and economic potential of gabbroic plutons in the Avalon terrane in southern New Brunswick and southeastern Cape Breton Island. Unpublished M.Sc. thesis, Acadia University, Wolfville, Nova Scotia, 378 p.
- Grammatikopoulos, A.L., Barr, S.M., Reynolds, P., and Doig, R. 1995. Petrology and age of the Mechanic Settlement Pluton, Avalon terrane, southern New Brunswick. Canadian Journal of Earth Sciences, 32, pp. 2147–2158. https://doi.org/10.1139/e95-167
- Grammatikopoulos, T.A., Barr, S.M., Hiebert, R.S., Stanley, C.R., and Valeyev, O. 2007. Cu-Ni and PGE minerals in the Mechanic Settlement Pluton, southern New Brunswick, Canada. The Canadian Mineralogist, 45, pp. 775–792. https://doi.org/10.2113/gscanmin.45.4.775
- Guy, G.H. 1998. Chemical and textural variations in the Bonnell Brook pluton, Caledonian Highlands, southern New Brunswick. Unpublished B.Sc. Honours thesis, Acadia University, Wolfville, Nova Scotia, 131 p.
- Hallberg, J.A. 1984. A geochemical aid to igneous rock type identification in deeply weathered terrain. Journal of Geochemical Exploration, 20, pp. 1–8. https://doi.org/10.1016/0375-6742(84)90085-2
- Harris, N.B.W., Pearce, J.A., and Tindle, A.G., 1986. Geochemical characteristics of collision-zone magmatism. In Collision Tectonics. Edited by M.P. Coward and A.C. Rles. Geological Society, London, Special Publications, 19, pp. 67–81. https://doi.org/10.1144/GSL.SP.1986.019.01.04
- Hergt, J.M., Peate, D.W., and Hawkesworth, C.J. 1991. The petrogenesis of Mesozoic Gondwana low-Ti flood basalts. Earth and Planetary Science Letters, 105, pp. 134–148. https://doi.org/10.1016/0012-821X(91)90126-3
- Hiebert, R.S. 2005. Petrogenesis of the Mechanic Settlement Pluton, southern New Brunswick, and controls on associated PGE mineralization. Unpublished M.Sc. thesis, Acadia University, Wolfville, Nova Scotia, 232 p.
- Hiebert, R.S., Barr, S.M., and Stanley, C.R. 2008. Magma evolution and PGE mineralization in the Mechanic Settlement Pluton, southern New Brunswick. Atlantic Geology, 44, pp. 78–92. https://doi.org/10.4138/6507
- Holder, R.M., Hacker, B.R., Kylander-Clark, A.R.C., and Cottle, J.M. 2015. Monazite trace-element and isotopic signatures of (ultra)high-pressure metamorphism: Examples from the Western Gneiss region, Norway. Chemical Geology, 409, pp. 99–111. https://doi.org/10.1016/j.chemgeo.2015.04.021
- Holohan, E.P., van Wyk de Vries, B., and Troll, V.R. 2008. Analogue models of caldera collapse in strike-slip tectonic regimes. Bulletin of Volcanology, 70, pp. 773–796. https://doi.org/10.1007/s00445-007-0166-x
- Hughes, C.J. 1972. Spilites, keratophyres, and the igneous spectrum. Geological Magazine, 109, pp. 513–527. https://doi.org/10.1017/S0016756800042795
- Irvine, T.N. and Baragar, W.R.A. 1971. A guide to the chemical classification of the common volcanic rocks. Canadian Journal of Earth Sciences, 8, pp. 523–548. https://doi.org/10.1139/e71-055
- Jakes, O. and Gill, J. 1970. Rare earth elements and the island arc tholeiitic series. Earth and Planetary Science Letters, 9, pp. 17–28. https://doi.org/10.1016/0012-821X(70)90018-X
- Kelley, K.D., Scott, C.T., Polyak, D.E., and Kimball, B.E. 2017. Vanadium. In Critical Mineral Resources of the United States—Economic and Environmental Geology and Prospects for Future Supply. Edited by K.L. Schulz, J.H. DeYoung, Jr., R.R. Seal, and D.C. Bradley. U.S. Geological Survey Professional Paper 1802 pp. U1–U36.
- Landing, E. 1996. Reconstructing the Avalon continent: marginal to inner platform transition in the Cambrian of southern New Brunswick. Canadian Journal of Earth Sciences, 33, pp. 1185–1192. https://doi.org/10.1139/e96-089
- Landing, E. and Westrop, S.R. 1998. Cambrian faunal sequences and depositional history of Avalonian Newfoundland and New Brunswick: field workshop. In Avalon 1997 – the Cambrian Standard. Edited by E. Landing and S.R. Westrop. New York State Museum Bulletin, 492, pp. 5–75.
- Le Maitre, R.W., Bateman, P., Dudek, A.J. and Keller, M.J. 1989. A classification of igneous rocks and glossary of terms, Blackwell, Oxford, 193 p.
- Lesher, C.M., Goodwin, A.M., Campbell, I.H., and Gorton, M.P. 1986. Trace-element geochemistry of ore-associated and barren, felsic metavolcanic rocks in the Superior Province, Canada. Canadian Journal of Earth Sciences, 23, pp. 222–237. https://doi.org/10.1139/e86-025
- McBirney, A.R. 1984. Igneous Petrology. Freeman, Cooper, and Company. p. 270.
- McDonough, W.F. and Sun, S.S. 1995. The composition of the earth. Chemical Geology, 120, pp. 223–253. https://doi.org/10.1016/0009-2541(94)00140-4
- Melluso, L., Mahoney, J.J., and Dallai, L. 2006. Mantle sources and crustal input as recorded in high-Mg Deccan Traps basalts of Gujarat (India). Lithos, 89, pp. 259–274. https://doi.org/10.1016/j.lithos.2005.12.007
- Miller, B.V., Barr, S.M., Fyffe, L.R., and White, C.E. 2000. New U–Pb ages from southern New Brunswick: preliminary results. In Current Research 1999. Edited by B.M.W. Carroll. New Brunswick Department of Natural Resources and Energy, Minerals and Energy Division, Mineral Resource Report, 2000-4, pp. 39–50.
- Moroz, R. 1994. Petrology and tectonic setting of the Teahan unit and associated base metal mineralization, Caledonian Highlands, southern New Brunswick. Unpublished M.Sc. Thesis, Acadia University, Wolfville, Nova Scotia, 182 p.
- Mullen, E.D. 1983. MnO/TiO2/P2O5: a minor element discriminant for basaltic rocks of oceanic environments and its implications for petrogenesis. Earth and Planetary Science Letters, 62, pp. 53–62. https://doi.org/10.1016/0012-821X(83)90070-5
- Murphy, B.J. and Nance, D.R. 2002. Sm–Nd isotopic systematics as tectonic tracers: an example from West Avalonia in the Canadian Appalachians. Earth Science reviews 59, pp. 77–100. https://doi.org/10.1016/S0012-8252(02)00070-3
- Palacios, T., Jensen, S., Barr, S.M., White, C.E., and Miller, R.F. 2011. New biostratigraphical constraints on the lower Cambrian Ratcliffe Brook Formation, southern New Brunswick, Canada, from organic-walled microfossils. Stratigraphy, 8, pp. 45–60.
- Pankhurst, M.J., Schaefer, B.F. and Betts, P.G. 2011. Geodynamics of rapid voluminous felsic magmatism through time. Lithos, 123, pp. 92–101. https://doi.org/10.1016/j.lithos.2010.11.014
- Park, A.F., Barr, S.M., and White, C.E. 2008. Preliminary investigation of a major high-strain zone in the Caledonian Highlands, southern New Brunswick. Atlantic Geology, 44, pp. 127–140. https://doi.org/10.4138/9717
- Park, A.F., Treat, R.L., Barr, S.M., White, C.E., Miller, B.V., Reynolds, P.H., and Hamilton, M.A. 2014. Structural setting of the Partridge Island block, southern New Brunswick, Canada: a link to the Cobequid Highlands of northern mainland Nova Scotia. Canadian Journal of Earth Sciences, 51, pp. 1–24. https://doi.org/10.1139/cjes-2013-0120
- Park, A.F., Barr, S.M., White, C.E., and Johnson, S.C. 2017. The Cambrian to Ordovician Saint John Group east of St. Martins, Fundy Coast Parkway, Saint John County, New Brunswick. New Brunswick Department of Energy and Resource Development, Geoscience Report GR 2017-2, pp. 1–30.
- Pearce, J.A. 2014. Immobile element fingerprinting of ophiolites, Elements, 10, pp. 101–108. https://doi.org/10.2113/gselements.10.2.101
- Pearce, J.A. and Peate, D.W. 1995. Tectonic implications of the composition of volcanic arc magmas. Annual Review of Earth and Planetary Sciences, 23, pp. 251–285. https://doi.org/10.1146/annurev.ea.23.050195.001343
- Pearce, J.A., Harris, N.W.B., and Tindle, A.G. 1984. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology, 25, pp. 956–983. https://doi.org/10.1093/petrology/25.4.956
- Pollock, J.C., Sylvester, P.J., Barr, S.M., and Murphy, B. 2015. Lu–Hf zircon and Sm–Nd whole rock isotope constraints on the extent of juvenile arc crust in Avalonia: examples from Newfoundland and Nova Scotia, Canada. Canadian Journal of Earth Sciences, 52, pp. 1–21. https://doi.org/10.1139/cjes-2014-0157
- Pollock, J., Barr, S.M., van Rooyen, D., and White, C.E. 2022. Lu–Hf zircon isotopic constraints on crustal evolution in Avalonia and Ganderia in the Canadian Appalachian orogen. In New developments in the Appalachian-Caledonian-Variscan orogen. Edited by Y. Kuiper, J.B. Murphy, R. D. Nance, R.S. Strachan, and M.D. Thompson. Geological Society of America Special Paper 554, pp. 173–207. https://doi.org/10.1130/2021.2554(08)
- Ruitenberg, A.A., Giles, P.S., Venugopal, D.V., Buttimer, S.M., McCutcheon, S.R., and Chandra, J. 1979. Geology and mineral deposits, Caledonia area. New Brunswick Department of Natural Resources, Mineral Resources Branch, Memoir 1, 213 p.
- Samson, S.D. 1995. Is the Carolina terrane part of Avalon? In Current Perspectives in the Appalachian-Caledonian Orogen. Edited by J.P. Hibbard, C.R. van Staal, and P.A. Cawood. Geological Association of Canada, Special Paper 41, pp. 253–264.
- Samson, S.D., Barr, S.M., and White, C.E. 2000. Nd isotopic characteristics of terranes within the Avalon zone, southern New Brunswick. Canadian Journal of Earth Sciences, 37, pp. 1039–1052. https://doi.org/10.1139/e00-015
- Satkoski, A.M. 2008. Sm–Nd isotopic and whole-rock chemical compositions of late Neoproterozoic and Cambrian sedimentary and metasedimentary rocks of the Caledonian Highlands, southern New Brunswick. Unpublished M.Sc. thesis, Acadia University, Wolfville, Nova Scotia, 150 p.
- Satkoski, A.M., Barr, S.M., and Samson, S.D. 2010. Provenance of Late Neoproterozoic and Cambrian sediments in Avalonia: constraints from detrital zircon ages and Sm–Nd isotopic compositions in southern New Brunswick, Canada. The Journal of Geology, 118, pp. 187–200. https://doi.org/10.1086/649818
- Shellnutt, J.G., Bhat, G.M., Wang, K.-L., Brookfield, M.E., Jahn, B.-M., and Dostal, J. 2014. Petrogenesis of the flood basalts from the early Permian Panjal Traps, Kashmir, India: geochemical evidence for shallow melting of the mantle. Lithos, 204, pp. 159–171. https://doi.org/10.1016/j.lithos.2014.01.008
- Shervais, J.W. 2022. The petrogenesis of modern and ophiolitic lavas reconsidered: Ti-V and Nb-Th. Geoscience Frontiers, 13, 101319. https://doi.org/10.1016/j.gsf.2021.101319
- Stanley, C. 2017. Molar element ratio analysis of lithogeochemical data: a toolbox for use in mineral exploration and mining. In Proceedings of Exploration 17: Sixth Decennial International Conference on Mineral Exploration. Edited by V. Tschirhart and M.D. Thomas. Geochemistry Exploration Environment Analysis, 33, pp. 471–494.
- Sun, S.S. and McDonough, W.F., 1989. Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In Magmatism in the ocean basins. Edited by A.D. Saunders and M.J. Norry, M.J. Geological Society, London, Special Publication, 42, pp. 313–345. https://doi.org/10.1144/GSL.SP.1989.042.01.19
- Tanoli, S.K. and Pickerill, R.K. 1988. Lithostratigraphy of the Cambrian–Lower Ordovician Saint John Group, southern New Brunswick. Canadian Journal of Earth Sciences, 25, pp. 669–690. https://doi.org/10.1139/e88-064
- Taylor, S.R. and McLennan, S.M. 1985. The continental crust: Its composition and evolution. Blackwell, Oxford, 312 p.
- Tegner, C., Lesher, C.E., Larsen, L.M., and Watt, W.S. 1998. Evidence from the rare-earth-element record of mantle melting for cooling of the Tertiary Iceland plume. Nature, 395, pp. 591–594. https://doi.org/10.1038/26956
- van Staal, C.R., Barr, S.M., McCausland, P.J., Thompson, M.D. and White, C.E. 2021. Tonian–Ediacaran tectonomagmatic evolution of West Avalonia and its Ediacaran–Early Cambrian interactions with Ganderia: an example of terrane transfer due to arc-arc collision? Geological Society, London, Special Publications, 503, pp. 143–167. https://doi.org/10.1144/SP503-2020-23
- Wang, Z., Yan Hei Li, M., Ray Liu, Z-R., and Zhou, M.F., 2021. Scandium: Ore deposits, the pivotal role of magmatic enrichment and future exploration. Ore Geology Reviews, 128, 103906. https://doi.org/10.1016/j.oregeorev.2020.103906
- Whalen J.B., Currie K.L., and Chappell B.W. 1987. A-type granites: geochemical characteristics, discrimination and petrogenesis. Contributions to Mineralogy and Petrology, 95, pp. 407–419. https://doi.org/10.1007/BF00402202
- Whalen, J.B., Jenner, G.A., Currie, K.L., Barr, S.M., Longstaffe, F.J., and Hegner, E. 1994. Geochemical and isotopic characteristics of granitoids of the Avalon Zone, southern New Brunswick: Possible evidence of repeated delamination events. Journal of Geology, 102, pp. 269–282. https://doi.org/10.1086/629670
- White, C.E., Barr, S.M., Jamieson, R.A., and Reynolds, P.H. 2001. Neoproterozoic high pressure/ low‐temperature metamorphic rocks in the Avalon terrane, southern New Brunswick, Canada. Journal of Metamorphic Petrology, 19, pp. 519–530. https://doi.org/10.1046/j.0263-4929.2001.00326.x
- Willner, A.P., Barr, S.M., Gerdes, A., Massonne, H.-J., and White, C.E. 2013. Origin and evolution of Avalonia: evidence from U–Pb and Lu–Hf isotopes in zircon from the Mira terrane, Canada, and the Stavelot–Venn Massif, Belgium. Journal of the Geological Society, 170, pp. 769–784. https://doi.org/10.1144/jgs2012-152
- Winchester, J.A. and Floyd, P.A. 1977. Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chemical Geology, 20, pp. 325–343. https://doi.org/10.1016/0009-2541(77)90057-2
- Wolff, J.A., Ramos, F.C., Hart, G.L., Patterson, J.D. and Brandon, A.D. 2008. Columbia River flood basalts from a centralized crustal magmatic system. Nature Geoscience, 1, pp. 177–180. https://doi.org/10.1038/ngeo124