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Canadian shield rock

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Journal Article
Published: 10 November 2011
Canadian Journal of Earth Sciences (2011) 48 (12): 1543-1560.
... corals in the northeast, near exposed Canadian Shield rocks, and stromatoporoids further out in the basin. Detailed facies analyses of each reef type shows distinct differences in their biological makeup, energy regimes, and carbonate sedimentation rates. Geochemical analyses (stable isotopes and rare...
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Journal Article
Published: 01 November 1971
Canadian Journal of Earth Sciences (1971) 8 (11): 1355-1372.
..., the path that the pole took in Neohelikian time relative to the Canadian Shield. Other poles well defined magnetically, but less well dated, from rocks of this era, fit the curve quite well.Analysis of available data supports the hypothesis that the relative polar movement that gave rise to the Logan Loop...
Journal Article
Journal: GSA Bulletin
Published: 01 September 1971
GSA Bulletin (1971) 82 (9): 2457-2472.
... magnetizations. After structural correction according to overlying Cambrian sediments, an over-all mean paleomagnetic pole from four dikes is obtained at 121° W., 43° N., which is in agreement with poles from Canadian Shield rocks of similar age. There is evidence in two of the dikes for a remagnetization...
Journal Article
Published: 01 May 2008
American Mineralogist (2008) 93 (5-6): 779-783.
... from the Skrikerum Cu-Ag-Tl selenide deposit, Smaland, southeastern Sweden . Canadian Mineralogist , 43 , 1373 – 1377 . Boone , S. and Kleppa , O.J. ( 1992 ) Enthalpies of formation for Group IV selenides (GeSe 2 , GeSe 2 (am), SnSe, SnSe 2 , PbSe) by direct-combination drop...
Journal Article
Journal: AAPG Bulletin
Published: 01 January 1966
AAPG Bulletin (1966) 50 (1): 159-165.
...Ervin G. Otvos Abstract The Upper Cambrian Potsdam Formation (orthoquartzitic sandstone and conglomerate) in eastern Ontario, southwestern Quebec, and northern New York State, was deposited during an early Paleozoic transgression over the Precambrian surface of the Canadian shield. Rock types...
Journal Article
Published: 29 May 2002
Canadian Journal of Earth Sciences (2002) 39 (5): 563-567.
...R.J. Wardle; J. Hall Abstract The Lithoprobe Eastern Canadian Shield Onshore–Offshore Transect (ECSOOT) has focused on studies of the processes by which the northeastern Canadian (Laurentian) Shield evolved, firstly by the 1.9–1.8 Ga coalescence of Archean cratons and then by the addition...
Journal Article
Journal: GSA Bulletin
Published: 01 May 1988
GSA Bulletin (1988) 100 (5): 630-638.
...O. VAN BREEMEN; A. DAVIDSON Abstract Granite and rhyolite ranging in age from ∼1.8-1.34 m.y. are known to underlie much of mid-continental North America west of the Phanerozoic Michigan Basin. U-Pb zircon ages of similar rocks exposed adjacent to the Grenville Province in Ontario suggest...
Journal Article
Journal: Geology
Published: 01 December 1989
Geology (1989) 17 (12): 1076-1079.
.... Dates on monazite are 17-19 Ma and are interpreted to have remained near their closure temperature of about 700 °C for several million years after emplacement, resulting in Pb loss by diffusion. We suggest that the granite was emplaced into rocks which were at high temperature and that they remained so...
Journal Article
Published: 01 October 1997
Exploration and Mining Geology (1997) 6 (4): 285-296.
Journal Article
Published: 01 December 1972
Canadian Journal of Earth Sciences (1972) 9 (12): 1650-1669.
...G. D. Jackson; F. C. Taylor Abstract Several groups of Aphebian layered rocks in the northeastern Canadian Shield have been correlated because of lithologic and stratigraphic similarities and alignment of groups and structural trends. Most of these layered rocks lie in three distinct fold belts...
Journal Article
Published: 01 July 2015
American Mineralogist (2015) 100 (7): 1578-1583.
... The rare earth elements (RE) include lanthanides, yttrium, and scandium. Geochemically classified as incompatible elements, they do not readily substitute into major rock-forming minerals but partition into minor phases and are important petrologic indicators of processes involving melting ( McLennan 1998...
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Journal Article
Journal: GSA Bulletin
Published: 01 September 2014
GSA Bulletin (2014) 126 (9-10): 1259-1274.
...Yvette D. Kuiper; Caroline D. Shields; Michael N. Tubrett; Venessa Bennett; Robert Buchwaldt Abstract We present a U-Pb detrital zircon age and provenance study of a sequence of metasedimentary rocks in the northwestern Thor–Odin high-grade gneiss dome within the Omineca crystalline belt...
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Series: GSA Memoirs
Published: 01 January 1982
DOI: 10.1130/MEM156-p27
...-northeast-trending structural grain of the older rocks and crossed the boundary between two very different geologic provinces. The northern part of the rift, including all the rift in the immediate vicinity of Lake Superior, formed on rocks of the Superior Province or where Superior Province rocks...
Journal Article
Published: 01 November 1978
Canadian Journal of Earth Sciences (1978) 15 (11): 1773-1782.
...Yuch-Ning Shieh; Henry P. Schwarcz Abstract The average 18 O/ 16 O ratios of the major rock types of the surface crystalline rocks in different parts of the Canadian Precambrian Shield have been determined, using 47 composite samples prepared from 2221 individual rock specimens. The sampling areas...
Journal Article
Published: 01 May 1977
Canadian Journal of Earth Sciences (1977) 14 (5): 927-931.
...Yuch-Ning Shieh; Henry P. Schwarcz Abstract The O 18 /O 16 ratios of the plutonic and supracrustal rocks from a large segment of the Superior province of the Canadian Precambrian Shield in Ontario (total area 111 000 km 2 ) have been determined, using 8 composite samples prepared from 8076...
Journal Article
Published: 01 April 2000
The Canadian Mineralogist (2000) 38 (2): 319-344.
... of the metamorphic history of Proterozoic orogenic belts and rock sequences in the Canadian Shield in Ontario, with a focus on rocks of the Southern and Grenville provinces. Metamorphism in the Southern Province has generally been attributed to the Penokean orogeny (~1879–1820 Ma), although the timing...
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Journal Article
Published: 01 December 1988
Canadian Journal of Earth Sciences (1988) 25 (12): 2075-2088.
... within these areas and elsewhere in the western Wabigoon Subprovince of the Canadian Shield. Dans la région des lacs Cameron – Rowan, la cartographie géologique, les études pétrographiques et les particularités lithogéochimiques des roches volcaniques archéennes ont permis de reconnaître trois...
Journal Article
Published: 01 June 1977
Canadian Journal of Earth Sciences (1977) 14 (6): 1356-1373.
...Rosaline Frith; R. A. Frith; R. Doig Abstract Archean granitic rocks along the southern Bear–Slave boundary fall into three age groups: the oldest are 3000 Ma old intrusive tonalites and granodiorites that form the basement to the Yellowknife Supergroup; the second are syn-volcanic granitic...
Journal Article
Published: 01 October 1992
Canadian Journal of Earth Sciences (1992) 29 (10): 2186-2199.
...O. van Breemen; W. J. Davis; J. E. King Abstract Granitoid rocks in the Slave Province consist of 4.0–2.8 Ga granitoid gneisses that predate the 2.71–2.65 Ga volcanic and turbiditic rocks of the Yellowknife Supergroup and 2.70–2.58 Ga granitoid plutons that intrude the Yellowknife Supergroup. U–Pb...
Journal Article
Published: 01 July 1985
Canadian Journal of Earth Sciences (1985) 22 (7): 1048-1065.
... analyses from 39 representative whole rocks from the suite suggest it was derived by batch melting of the crust, producing a parental magma of tonalitic or granodioritic composition. By analysing REE from different parts of a zoned pluton, it was concluded that REE distribution was controlled by early...