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Relevant bibliographies by topics / Carbonatites - Ontario

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Academic literature on the topic 'Carbonatites - Ontario'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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Journal articles on the topic "Carbonatites - Ontario"

1

Moecher, David P., Eric D. Anderson, Claudia A. Cook, and Klaus Mezger. "The petrogenesis of metamorphosed carbonatites in the Grenville Province, Ontario." Canadian Journal of Earth Sciences 34, no. 9 (1997): 1185–201. http://dx.doi.org/10.1139/e17-095.

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Veins and dikes of calcite-rich rocks within the Central Metasedimentary Belt boundary zone (CMBbz) in the Grenville Province of Ontario have been interpreted to be true carbonatites or to be pseudocarbonatites derived from interaction of pegmatite melts and regional Grenville marble. The putative carbonatites have been metamorphosed and consist mainly of calcite, biotite, and apatite with lesser amounts of clinopyroxene, magnetite, allanite, zircon, titanite, cerite, celestite, and barite. The rocks have high P and rare earth element (REE) contents, and calcite in carbonatite has elevated Sr,

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2

Jones, James M. C., Elizabeth A. Webb, Michael D. J. Lynch, Trevor C. Charles, Pedro M. Antunes, and Frédérique C. Guinel. "Does a carbonatite deposit influence its surrounding ecosystem?" FACETS 4, no. 1 (2019): 389–406. http://dx.doi.org/10.1139/facets-2018-0029.

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Carbonatites are unusual alkaline rocks with diverse compositions. Although previous work has characterized the effects these rocks have on soils and plants, little is known about their impacts on local ecosystems. Using a deposit within the Great Lakes–St. Lawrence forest in northern Ontario, Canada, we investigated the effect of a carbonatite on soil chemistry and on the structure of plant and soil microbial communities. This was done using a vegetation survey conducted above and around the deposit, with corresponding soil samples collected for determining soil nutrient composition and for a

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3

Bell, Keith, John Blenkinsop, S. T. Kwon, G. R. Tilton, and R. P. Sage. "Age and radiogenic isotopic systematics of the Borden carbonatite complex, Ontario, Canada." Canadian Journal of Earth Sciences 24, no. 1 (1987): 24–30. http://dx.doi.org/10.1139/e87-003.

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Rb–Sr and U–Pb data from the Borden complex of northern Ontario, a carbonatite associated with the Kapuskasing Structural Zone, indicate a mid-Proterozoic age. A 207Pb/206Pb age of 1872 ± 13 Ma is interpreted as the emplacement age of this body, grouping it with other ca. 1900 Ma complexes that are the oldest known carbonatites associated with the Kapuskasing structure. A 206Pb–238U age of 1894 ± 29 Ma agrees with the Pb–Pb age but has a high mean square of weighted deviates (MSWD) of 42. A Rb–Sr apatite–carbonate–mica whole-rock isochron date of 1807 ± 13 Ma probably indicates later resetting

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4

Mitchell, Roger H., Rudy Wahl, and Anthony Cohen. "Mineralogy and genesis of pyrochlore apatitite from The Good Hope Carbonatite, Ontario: A potential niobium deposit." Mineralogical Magazine 84, no. 1 (2019): 81–91. http://dx.doi.org/10.1180/mgm.2019.64.

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AbstractThe Good Hope carbonatite is located adjacent to the Prairie Lake alkaline rock and carbonatite complex in northwestern Ontario. The occurrence is a heterolithic breccia consisting of diverse calcite, dolomite and ferrodolomite carbonatites containing clasts of magnesio-arfvedsonite + potassium feldspar, phlogopite + potassium feldspar together with pyrochlore-bearing apatitite clasts. The apatitite occurs as angular, boudinaged and schlieren clasts up to 5 cm in maximum dimensions. In these pyrochlore occurs principally as euhedral single crystals (0.1–1.5 cm) and can comprise up to 2

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5

WU, FU-YUAN, ROGER H. MITCHELL, QIU-LI LI, CHANG ZHANG, and YUE-HENG YANG. "Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada." Geological Magazine 154, no. 2 (2016): 217–36. http://dx.doi.org/10.1017/s0016756815001120.

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AbstractAlkaline rock and carbonatite complexes, including the Prairie Lake complex (NW Ontario), are widely distributed in the Canadian region of the Midcontinent Rift in North America. It has been suggested that these complexes were emplaced during the main stage of rifting magmatism and are related to a mantle plume. The Prairie Lake complex is composed of carbonatite, ijolite and potassic nepheline syenite. Two samples of baddeleyite from the carbonatite yield U–Pb ages of 1157.2±2.3 and 1158.2±3.8 Ma, identical to the age of 1163.6±3.6 Ma obtained for baddeleyite from the ijolite. Apatite

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6

Symons, D. T. A. "Age of the Firesand River carbonatite complex from paleomagnetism." Canadian Journal of Earth Sciences 26, no. 11 (1989): 2401–5. http://dx.doi.org/10.1139/e89-205.

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The 2.3 km diameter Firesand River complex intrudes Archean volcanics and granites of the Wawa Subprovince in the Superior Province about 8 km east of Wawa, Ontario. It has given differing Middle Proterozoic K–Ar biotite ages of 1018 ± 50 and 1097 Ma. Alternating-field and thermal step demagnetization of specimens from three calcific carbonatite sites, five ferruginous dolomitic carbonatite sites, and one lamprophyre dike site isolated a stable mean direction of 290°, 33 °(α95 = 12°). Isothermal remanent magnetization tests indicate the remanence is held by single-to pseudosingle-domain magnet

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7

PRESSACCO, R. "Geology of the Cargill Township Residual Carbonatite-associated Phosphate Deposit, Kapuskasing, Ontario." Exploration and Mining Geology 10, no. 1-2 (2001): 77–84. http://dx.doi.org/10.2113/10.1-2.77.

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8

Symons, D. T. A. "Paleomagnetism of the Keweenawan Chipman Lake and Seabrook Lake carbonatite complexes, Ontario." Canadian Journal of Earth Sciences 29, no. 6 (1992): 1215–23. http://dx.doi.org/10.1139/e92-097.

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The Chipman Lake complex crops out as a series of carbonatite and related alkalic mafic dikes in the Wabigoon Subprovince of the Superior Province, whereas the Seabrook Lake complex crops out as an alkalic syenite – carbonatite stock in the Abitibi Subprovince. Paleomagnetic analysis was done on specimens from 23 and 19 sites located in and around the Chipman Lake and Seabrook Lake complexes, respectively, using detailed alternating-field and thermal step demagnetization and isothermal remanent magnetization tests. Contact tests with adjacent Archean host rocks show that both complexes retain

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9

Garth Platt, R. "Perovskite, loparite and Ba-Fe hollandite from the Schryburt Lake carbonatite complex, northwestern Ontario, Canada." Mineralogical Magazine 58, no. 390 (1994): 49–57. http://dx.doi.org/10.1180/minmag.1994.058.390.05.

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AbstractWithin a suite of felsic-free, mica-rich alkaline ultramafic rocks of the Schryburt Lake carbonatite complex of northwestern Ontario, loparite and Ba-Fe hollandite occur in intimate association with perovskite. The host rocks have variable modal proportions of Mg-olivine, phlogopite, magnetite, ilmenite, apatite and carbonate (generally calcite) with minor Mg-salite. Thus, they correspond to ultramafic lamprophyres (i.e. aillikites), in the sense of Rock (1990) or the lamprophyric facies of the melilitite clan, in the sense of Mitchell (1993).Perovskite is the principal titanate phase,

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10

Ford, K. L., R. N. W. Dilabio, and A. N. Rencz. "Geological, geophysical and geochemical studies around the Allan Lake carbonatite, Algonquin Park, Ontario." Journal of Geochemical Exploration 30, no. 1-3 (1988): 99–121. http://dx.doi.org/10.1016/0375-6742(88)90054-4.

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