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Pleasant Hills Pluton

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Journal Article
Journal: GSA Bulletin
Published: 01 April 1998
GSA Bulletin (1998) 110 (4): 523–536.
...Georgia Pe-Piper; Ioannis Koukouvelas; David J. W. Piper Abstract The 361–356 Ma (Late Devonian) Pleasant Hills pluton comprises a series of sheets of mafic, felsic, and hybrid intermediate plutonic rocks that were emplaced along a positive flower structure associated with the crustal-scale...
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Summary geological map of the area north of the Pleasant Hills pluton, showing the observed distribution of minor intrusions.
Published: 18 December 2000
Fig. 9. Summary geological map of the area north of the Pleasant Hills pluton, showing the observed distribution of minor intrusions.
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Fig. 3.
Published: 23 June 2015
fracture in the Pleasant Hills pluton. (D) A chlorite-filled fracture that is irregularly cut by a later magnetite veinlet in the North River pluton. (E) Grains of baryte found in a rare magnetite vein in the Wentworth granites. (F) Late magnetite filling a dismembered chlorite fracture in the Pleasant
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εNd vs. pressure (A), temperature (B), and estimated viscosity (C) for the calcic granites. PHP—Pleasant Hills pluton; WP—Wentworth pluton.
Published: 01 March 2016
Figure 8. ε Nd vs. pressure (A), temperature (B), and estimated viscosity (C) for the calcic granites. PHP—Pleasant Hills pluton; WP—Wentworth pluton.
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Chondrite-normalized rare earth element (REE) patterns for (A) sodic, (B) calcic, and (C) biotite granites from the Upper Paleozoic plutons of the Cobequid Highlands. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
Published: 01 March 2016
Figure 4. Chondrite-normalized rare earth element (REE) patterns for (A) sodic, (B) calcic, and (C) biotite granites from the Upper Paleozoic plutons of the Cobequid Highlands. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
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Pressure (estimated from plagioclase-melt barometer) vs. water-in-melt concentrations, demonstrating the systematic differences of those parameters between the calcic and biotite A-type granites. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
Published: 01 March 2016
Figure 6. Pressure (estimated from plagioclase-melt barometer) vs. water-in-melt concentrations, demonstrating the systematic differences of those parameters between the calcic and biotite A-type granites. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth
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Plots of the modeled fraction of extracted melt for the biotite and calcic granites vs. (A) Cr and (B) Zn, demonstrating the limited control of partial melting on the systematic variations of these elements. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
Published: 01 March 2016
Figure 10. Plots of the modeled fraction of extracted melt for the biotite and calcic granites vs. (A) Cr and (B) Zn, demonstrating the limited control of partial melting on the systematic variations of these elements. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton
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Plots of (A) estimated water-in-melt amounts and (B) zircon-saturation temperatures vs. the degree of partial melting for the calcic and the biotite granites, demonstrating the control of water availability and temperature on the fraction of produced melt. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
Published: 01 March 2016
; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
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Harker-type geochemical plots of selected trace elements such as (A) Ba, (B) Nb, (C) Cr, (D) Zn, (E) Ga, and (F) Sr for the different granitic types present in the Upper Paleozoic plutons of the Cobequid Highlands. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
Published: 01 March 2016
Figure 5. Harker-type geochemical plots of selected trace elements such as (A) Ba, (B) Nb, (C) Cr, (D) Zn, (E) Ga, and (F) Sr for the different granitic types present in the Upper Paleozoic plutons of the Cobequid Highlands. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills
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A-type discrimination diagrams (after Eby, 1992) for (A) sodic, (B) calcic, and (C) biotite granites. A1 field includes granites derived by fractionation of mafic melts, whereas A2 field is for granites derived by partial melting of crustal rocks. CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
Published: 01 March 2016
River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton.
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Concordia diagrams for samples A to O, using data from Table 1. Bk., Brook; Fm,Formation; Gp, Group; PHP, Pleasant Hills pluton; WMR, West Moose River. E and W in parentheses indicate east and west, respectively.
Published: 26 August 2002
Fig. 6. Concordia diagrams for samples A to O, using data from Table  1 . Bk., Brook; Fm,Formation; Gp, Group; PHP, Pleasant Hills pluton; WMR, West Moose River. E and W in parentheses indicate east and west, respectively.
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Geochemical classification diagrams for the Upper Paleozoic granites from the Cobequid Highlands showing (A) classification of the studied granites as A-type (after Whalen et al., 1987), and (B) the alkaline character of the sodic, calcic, and biotite granites (as in Maniar and Piccoli, 1989). CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton; ANK—molar Al/(Na+K); ACNK—molar Al/(Ca+Na+K).
Published: 01 March 2016
and Piccoli, 1989 ). CCP—Cape Chignecto pluton; NRP—North River pluton; PHP—Pleasant Hills pluton; WP—Wentworth pluton; ANK—molar Al/(Na+K); ACNK—molar Al/(Ca+Na+K).
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Geochemical character of igneous rocks in the New Annan tectonite and of hypabyssal intrusions north of the Pleasant Hills pluton. (a) Rock nomenclature after Winchester and Floyd (1977). (b) Rocks plotted on a Nb/Zr vs. Y/TiO2 diagram, with fields from Fig. 7d; (c) Plot of Zr/Y vs. Zr, tectonic environment discrimination for mafic rocks after Pearce and Norry (1979). (d) Nb/Zr vs. Y/TiO2 plot of all available analyses of volcanic and hypabyssal rocks of the Cobequid Highlands of Neoproterzoic and of upper Paleozoic age. Large field shows limit of Neoproterozoic rocks; small field is overlap of Neoproterozoic and upper Paleozoic rocks.
Published: 18 December 2000
Fig. 7. Geochemical character of igneous rocks in the New Annan tectonite and of hypabyssal intrusions north of the Pleasant Hills pluton. ( a ) Rock nomenclature after Winchester and Floyd ( 1977 ). ( b ) Rocks plotted on a Nb/Zr vs. Y/TiO 2 diagram, with fields from Fig.  7 d ; ( c ) Plot
Journal Article
Published: 23 June 2015
The Canadian Mineralogist (2014) 52 (6): 943–968.
... fracture in the Pleasant Hills pluton. (D) A chlorite-filled fracture that is irregularly cut by a later magnetite veinlet in the North River pluton. (E) Grains of baryte found in a rare magnetite vein in the Wentworth granites. (F) Late magnetite filling a dismembered chlorite fracture in the Pleasant...
FIGURES | View All (11)
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Detail of geology and new geochronology for the Gold Hill shear zone in the Mount Pleasant–High Rock Lake area; location is shown in Figure 2. Red lines—regional fold axial traces. CG—Cotton Grove granodiorite, Da—Denton anticline, GH—Gold Hill granitoid, GHf—Gold Hill fault, MP—Mount Pleasant granitoid, NLs—New London syncline, S—Southmont pluton, Sa—Salisbury pluton, SHf—Silver Hill fault, SVs—Silver Valley syncline.
Published: 01 May 2012
Pleasant granitoid, NLs—New London syncline, S—Southmont pluton, Sa—Salisbury pluton, SHf—Silver Hill fault, SVs—Silver Valley syncline.
Journal Article
Published: 26 August 2002
Canadian Journal of Earth Sciences (2002) 39 (8): 1219–1237.
...Fig. 6. Concordia diagrams for samples A to O, using data from Table  1 . Bk., Brook; Fm,Formation; Gp, Group; PHP, Pleasant Hills pluton; WMR, West Moose River. E and W in parentheses indicate east and west, respectively. ...
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Journal Article
Published: 18 December 2000
Canadian Journal of Earth Sciences (2001) 38 (1): 43–58.
...Fig. 9. Summary geological map of the area north of the Pleasant Hills pluton, showing the observed distribution of minor intrusions. ...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2016
GSA Bulletin (2016) 128 (3-4): 487–501.
...Figure 8. ε Nd vs. pressure (A), temperature (B), and estimated viscosity (C) for the calcic granites. PHP—Pleasant Hills pluton; WP—Wentworth pluton. ...
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Journal Article
Published: 26 March 2019
Canadian Journal of Earth Sciences (2019) 56 (10): 1061–1076.
... Formation, Pleasant Grove Schist, Prettyboy Schist, and Wissahickon Formation allow sediment provenance solely in Ediacaran Laurentia. We also present new zircon spot U–Pb and Lu–Hf isotopic data from western Newfoundland plutons for comparison with these types of data from the detrital zircon. Intrusion...
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Series: Geological Society, London, Special Publications
Published: 13 January 2021
DOI: 10.1144/SP503-2019-239
EISBN: 9781786209917
... Devonian–early Carboniferous, the strike-slip motion on the Rockland Brook Fault was likely to have been distributed in a step-over zone between the Pleasant Hills and West Moose River plutons ( Koukouvelas et al. 2006 ). The Cobequid Fault shows predominantly brittle deformation of mid-Serpukhovian...
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