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Buchan group

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Journal Article
Published: 01 October 1966
Micropaleontology (1966) 12 (4): 441-460.
...G. M. Philip Abstract The material for this systematic study of conodonts from eastern Victoria comes from localities in Buchan Caves limestone, Taravale mudstone, and Murrindal limestone members of the Buchan group, which previously had been regarded as middle Devonian in age. In comparison...
Journal Article
Published: 01 March 1984
Canadian Journal of Earth Sciences (1984) 21 (3): 284-296.
...Godfrey S. Nowlan; J. Geoffrey Thurlow Abstract Conodonts have been recovered from carbonate clasts within breccia units in the Buchans Group of central Newfoundland. The assemblage is characterized by specimens of " Cordylodus " horridus Barnes and Poplawski and Histiodella holodentata Ethington...
Journal Article
Published: 16 August 2013
Canadian Journal of Earth Sciences (2013) 50 (11): 1116-1133.
...J.B. Whalen; A. Zagorevski; V.J. McNicoll; N. Rogers Abstract The Buchans Group, central Newfoundland, represents an Ordovician continental bimodal calc-alkaline arc sequence that hosts numerous volcanogenic massive sulfide (VMS) occurrences, including both in situ and mechanically transported...
Image
Concordia diagrams for the <b>Buchan</b> <b>Group</b> rhyolite zircons showing total Pb, ...
Published: 01 February 2000
F ig . 7 a,b . Concordia diagrams for the Buchan Group rhyolite zircons showing total Pb, radiogenic Pb (open symbols) as corrected by Dunning and Krogh (1991) , and as corrected using ~2% lower common 204 Pb/ 206 Pb.
Journal Article
Published: 01 June 1987
Canadian Journal of Earth Sciences (1987) 24 (6): 1175-1184.
...-bearing black shales.New U–Pb zircon ages of and 473 ± 2 Ma for rhyolites of the Buchans and Roberts Arm groups, respectively, show them to be correlative early Ordovician sequences. These ages serve to refute both the previous Rb–Sr whole-rock isochron ages of 447 Ma and the idea that these groups were...
Journal Article
Journal: GSA Bulletin
Published: 01 March 2006
GSA Bulletin (2006) 118 (3-4): 324-342.
...) preserves a fragment of younger, more mid-ocean-ridge–like backarc-oceanic crust than the adjacent, structurally overlying Annieopsquotch ophiolite belt. The Lloyds River ophiolite complex originated as a backarc to the Buchans Group (ca. 473 Ma) ensialic bimodal calc-alkaline arc. The panels containing...
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Journal Article
Published: 01 September 1992
Canadian Journal of Earth Sciences (1992) 29 (9): 2022-2037.
... Lake. This shallow, north-dipping sole thrust forms the structural base of the Buchans Group and brings it above a younger fossiliferous Llanvirn volcanic sequence. This fault is not itself the Red Indian Line but is one of a series of faults that collectively effect substantial geological contrasts...
Journal Article
Published: 01 March 1979
Canadian Journal of Earth Sciences (1979) 16 (3): 599-606.
... the central mobile belt of Newfoundland that occurred in late Middle or early Late Ordovician time. If the Buchans Group is of Silurian age and correlative with the Roberts Arm Group then this lithostratigraphic unit is probably diachronous, younging to the south. Les roches felsiques du groupe de...
Journal Article
Published: 01 May 2000
Scottish Journal of Geology (2000) 36 (1): 39-49.
... for interpreting Buchan-type metamorphic conditions ( Hudson 1985 ; Kearns 1989 ), occur amongst the Southern Highland Group rocks and are particularly well displayed in the andalusite and staurolite zones on the coastal section at Banff ( Fig. 1 ). Calc-silicate assemblages may develop by metamorphism of bedded...
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Journal Article
Journal: Geology
Published: 01 May 2000
Geology (2000) 28 (5): 459-462.
... of the Caledonian Buchan and Barrovian tectonometamorphism in their type areas as contemporaneous at 467 ± 2.5 Ma. Detrital garnet from the neighboring Southern Uplands flysch terrane has the same radiometric age and occurs in 465 ± 2.5 Ma molasse in the Midland Valley. We show that the entire Grampian episode...
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Journal Article
Published: 01 January 2016
Journal of the Geological Society (2016) 173 (1): 76-93.
... geochronological data ( n = 8) for felsic volcanic rocks representing three distinct tectonostratigraphic units (the Mary March Brook group, the Buchans Group and the Red Indian Lake Group) indicate deposition over a short interval between 465 and 462 Ma. These tectonostratigraphic units are characterized...
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Series: Geological Society, London, Special Publications
Published: 01 January 2004
DOI: 10.1144/GSL.SP.2004.225.01.21
EISBN: 9781862394735
... of Nottinghamshire ( Land 1966 ). Buchan himself spent a lot of his time in these early days publicising the work of his Department. He lectured to groups and organisations such as the Geologists’ Association, the Institution of Sanitary Engineers, the British Waterworks Association and the Institution of Water...
FIGURES
Journal Article
Published: 05 May 2016
Journal of the Geological Society (2016) 173 (5): 773-782.
... of the upper Dalradian rocks (Argyll and Southern Highland Groups). The source areas of sediments on the Buchan Block are not dissimilar to those for Dalradian rocks elsewhere; although the Buchan Block may conceivably have been translated significant distances into its current position during Grampian...
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Journal Article
Journal: GSA Bulletin
Published: 09 November 2017
GSA Bulletin (2017) 130 (3-4): 678-704.
...Marc R. St-Onge; William J. Davis Abstract The internal metamorphic-plutonic zone of the middle Paleoproterozoic Wopmay orogen, northwestern Canadian Shield, exposes an oblique section through a prograde Buchan-type metamorphic sequence. New petrographic, petrologic, and geochronologic analyses...
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Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP403.8
EISBN: 9781862396791
... The seismic sequence analysis in this study is reliant on the recognition and interpretation of boundaries, reflection terminations and internal stacking patterns in order to group depositional sequences into their relevant systems tracts (e.g. Mitchum 1977 ; Vail et al. 1977...
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Journal Article
Published: 01 March 1985
Canadian Journal of Earth Sciences (1985) 22 (3): 486.
Journal Article
Published: 01 March 1985
Canadian Journal of Earth Sciences (1985) 22 (3): 484-485.
Published: 01 January 2018
DOI: 10.1144/SP472.11
EISBN: 9781786204127
... for intracontinental rifts, as in the Jaibaras trough ( Oliveira & de Mohriak 2003 and references cited therein). They cannot be considered as precursor rifts for the late Ordovician Serra Grande Group because the present contact of this sequence is erosional and overlaps all the structures ( Vaz et al . 2007...
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Journal Article
Published: 01 September 2004
Journal of the Geological Society (2004) 161 (5): 743-746.
...ALANS. COLLINS; CRAIG BUCHAN Abstract U–Th–Pb Secondary Ion Mass Spectrometry (SIMS) data from detrital zircons extracted from the South Stack Group, Anglesey, UK, indicate that: (1) the maximum depositional age of the Holyhead Formation (South Stack Group, Monian Supergroup) is 501 ± 10 Ma; (2...
FIGURES
Journal Article
Published: 01 March 2012
Journal of the Geological Society (2012) 169 (2): 213-226.
...Ian McDougall; Francis H. Brown; Paulo M. Vasconcelos; Benjamin E. Cohen; David S. Thiede; Michael J. Buchanan Abstract Six tuffaceous beds within the Omo Group of the Omo–Turkana Basin have been dated using the 40 Ar/ 39 Ar single crystal total fusion method on anorthoclase, yielding eruption ages...
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