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Thetford

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Journal Article
Journal: Geology
Published: 01 March 2012
Geology (2012) 40 (3): 275–278.
... Lake mine, Thetford Mines, Québec, Canada. The venting areas are inconspicuous, except in winter when the vents form snow-free areas of unfrozen ground, each with a surface area of 1–15 m 2 . The temperature and chemical composition of the warm air vents have been monitored from March 2009 to July 2010...
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Journal Article
Journal: Economic Geology
Published: 01 November 2009
Economic Geology (2009) 104 (7): 997–1018.
...Philippe Pagé; Sarah-Jane Barnes Abstract The Thetford Mines Ophiolite is interpreted as a fragment of a fore-arc oceanic lithosphere. This complete ophiolitic sequence consists of a thick mantle sequence, a plutonic crustal component, and a volcano-sedimentary sequence dominated by boninitic...
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Series: Geological Society, London, Special Publications
Published: 01 January 2003
DOI: 10.1144/GSL.SP.2003.218.01.13
EISBN: 9781862394667
... Abstract The Ordovician Thetford Mines Ophiolite Complex (TMOC) is an oceanic terrane accreted to the Laurentian margin during the Taconic Orogeny and is affected by syn-obduction (syn-emplacement) deformation and two post-obduction events (Silurian backthrusting and normal faulting...
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Journal Article
Journal: GSA Bulletin
Published: 01 June 2000
GSA Bulletin (2000) 112 (6): 915–928.
...J. Whitehead; G.R. Dunning; J.G. Spray Abstract We integrate new and existing age data from ophiolite and subophiolite rocks in the Thetford Mines region, Québec Appalachians, to determine the timing of: (1) oceanic crust formation; (2) oceanic decoupling; (3) ophiolite emplacement onto...
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Journal Article
Published: 01 September 1997
Canadian Journal of Earth Sciences (1997) 34 (9): 1258–1271.
...Valérie Olive; Réjean Hébert; Michel Loubet Abstract The Mont Ham Massif (part of the Thetford Mines ophiolite, south Quebec) represents a magmatic sequence made up of tholeiitic and boninitic derived products. A geochemical study confirms the multicomponent mixing models that have been classically...
Journal Article
Published: 01 June 1994
The Canadian Mineralogist (1994) 32 (2): 307–317.
Journal Article
Published: 01 September 1990
The Canadian Mineralogist (1990) 28 (3): 579–595.
Journal Article
Published: 01 September 1990
The Canadian Mineralogist (1990) 28 (3): 597–605.
Journal Article
Published: 01 June 1987
Canadian Journal of Earth Sciences (1987) 24 (6): 1270–1273.
Journal Article
Published: 01 June 1987
Canadian Journal of Earth Sciences (1987) 24 (6): 1273–1275.
Series: DNAG, Centennial Field Guides
Published: 01 January 1987
DOI: 10.1130/0-8137-5405-4.369
EISBN: 9780813754116
... Location and Accessibility Thetford Mines is 50 mi (80 km) due south of Québec City (Fig. 1). The road log for each stop begins (0.0 mi; 0.0 km) at the turnoff from Québec 112, a given distance from the junction of Québec 112 and Québec 267 in Thetford Mines. Stop 1. Scenic View–Mine Lac...
Journal Article
Journal: Economic Geology
Published: 01 July 1986
Economic Geology (1986) 81 (4): 931–945.
...I. O. Oshin; James H. Crocket Abstract The gold, silver, iridium, palladium, and platinum contents of basic volcanics and argillaceous sedimentary rocks from the Lac de l'Est, Thetford Mines area, Quebec, were determined by radiochemical neutron activation analysis. Copper and sulfur were also...
Journal Article
Published: 01 February 1986
Canadian Journal of Earth Sciences (1986) 23 (2): 202–213.
...I. O. Oshin; J. H. Crocket Abstract The Cambro-Ordovician age Thetford Mines Complex from the Quebec Appalachians, Canada, preserves a remarkably complete section of ophiolites at Lac de l'Est, where mafic volcanics overlie a plutonic mafic–ultramafic plate. The basaltic volcanics consist...
Journal Article
Published: 01 September 1985
Canadian Journal of Earth Sciences (1985) 22 (9): 1257–1261.
...David A. Clague; Charles S. Frani El; Jacqueline S. Eaby Abstract The Thetford Mines ophiolite in southern Quebec was obducted in Early Ordovician time during the closing of the proto-Atlantic. The tectonized peridotite lower unit of the ophiolite is intruded by felsic dikes and pods including...
Journal Article
Published: 01 October 1984
Canadian Journal of Earth Sciences (1984) 21 (10): 1114–1125.
...Roger Laurent; Mehmet F. Taner; Jean Bertrand Abstract Sheets of granite are confined to shear zones in the tectonite peridotite unit of the Thetford Mines ophiolite complex. Their orientation is parallel to the thrust plane at the base of the complex. The granite, which is calc-alkaline and rich...
Journal Article
Published: 01 August 1983
Canadian Journal of Earth Sciences (1983) 20 (8): 1327–1339.
...Maurice K. Seguin Abstract The present study, based on detailed gravity anomaly (Bouguer and residual) and magnetic maps of the Thetford Mines area, seeks to explain the mechanism by which the Lac Bécancour structural unit was emplaced. The Bouguer anomaly map shows: (1) generally more positive...
Journal Article
Journal: Economic Geology
Published: 01 October 1982
Economic Geology (1982) 77 (6): 1556–1570.
...I. O. Oshin; J. H. Crocket Abstract The gold, iridium, palladium, and platinum contents of ophiolites from the Thetford mines area, Quebec, were determined by radiochemical neutron activation analysis. The main lithologies studied are the tectonite peridotites (harzburgites) of the lower structural...
Journal Article
Published: 01 December 1981
Canadian Journal of Earth Sciences (1981) 18 (12): 1878–1892.
...Tomas Feininger Abstract Amphibolite in the Quebec Appalachians at Belmina Ridge (45°58′N; 71°28′W) constitutes a steeply dipping, allochthonous sheet as much as 800 m thick, between the obducted Thetford Mines Ophiolite Complex to the east and rocks of the allochthonous Caldwell Group to the west...
Journal Article
Published: 01 March 1981
Canadian Journal of Earth Sciences (1981) 18 (3): 469–486.
...David Clague; Jason Rubin; Russell Brackett Abstract The Thetford Mines ophiolite in southern Quebec is partially underlain by an 800 m thick amphibolite aureole. Rocks in the metamorphic unit grade inward towards the base of the ophiolite from chlorite–muscovite schist, epidote amphibolite...
Journal Article
Published: 01 August 1975
Canadian Journal of Earth Sciences (1975) 12 (8): 1406–1420.
... stable dans les zones internes des coussins rendant possible une étude paléomagnétique régionale du complexe ophiolitique de Thetford-Mines. ...