.... In the Deloro pluton assimilation of gabbro-diabase by the granite magma accounts for the syenitic western border, but magmatic differentiation by fractional crystallization caused a systematic trend of acidification toward the central and eastern parts of the pluton and the location of the Q-Pl-Kf plots...

... of assimilation–fractional crystallization.Peralkaline granite of the Deloro pluton includes a hypersolvus phase with high, scattered δ 18 O values (9.1–11.8‰) and a subsolvus counterpart attributed to late influx of water that induced isotopic reequilibration toward a more constrained range (δ 18 O = 9.2–10.2...

... (Figs. 1 , 5 ; Ayer et al., 2005b ). In this interpretation, a fault on the northern, outward-dipping contact of the lens of Deloro assemblage strata is characterized by normal, dip-slip displacement. Normal displacement is consistent with apparent offset of the floor of the pluton. At the northern...

... plutonic rocks (gabbro-diorite, tonalite, and granite) alternating with east-trending bands of turbiditic wackes ( MER-OGS, 1984 ; Ayer et al., 2002a ; Daigneault et al., 2004 ; Goutier and Melançon, 2007 ). Most of the volcanic and sedimentary strata dip vertically and are generally separated...

... surveys image the full crust down to 36-km depth to reveal a heterogeneous architecture. Three crustal-scale layers include a resistive (10 4 –10 5 Ωm) upper crust of granite-greenstone rocks, a low-resistivity (~10–50 Ωm) middle crust dominated by granitic plutons for which low resistivity is attributed...

... of the Deloro Assemblage (2734–2724 Ma), which occur south of the PDDZ ( Figs. 1 and 3 ) ( Pyke 1982 ; Brisbin 1997 , 2000 ; Bateman et al. 2008 ; Ayer et al. 2002 , 2003 a , 2005 ; Thurston et al. 2008 ; Dubé et al. 2017 ). Most gold deposits of the Timmins–Porcupine camp, however, occur north...

...W.J. Davis; S. Lacroix; C. Gariépy; N. Machado Abstract Nine new U–Pb ages are reported for plutons of the central granite–gneiss zone of the Abitibi belt in Quebec. The large plutonic complex along Lithoprobe seismic reflection line 28 formed by multiple intrusion over at least 40 million years...

... Egypt contains at least 11 alkaline ring complexes and five A-type granitic plutons. A much larger number of anorogenic alkaline complexes was emplaced within the shield rocks of the Sudan and Saudi Arabia (e.g. Almond et al. , 1983 ; Vail, 1985 a ; O’Halloran, 1985 ; Harris, 1985 ). The area...

... Abdel-Rahman (2006) , Eyal et al. (2010) , and references therein. Note that the study area at Mount Hamr (i) is located at the intersection of faults and shear zones. This detailed study focuses on a typical example of alkaline A-type granites from the ANS, the Mount Hamr pluton ( Figs. 1...

... texture. Discordant, highly magnetic, late- to post-tectonic granites (1030 Ma), alkalic composite (felsic–mafic) plutons (1005– 989 Ma), and coeval felsic and mafic dikes (>974 Ma) intrude the Manitou Complex ( Gobeil et al. 2003 ; Wodicka et al. 2003 ; D.W. Davis, unpublished data, 2004...

... at 2690 Ma, synchronous with emplacement of a suite of syntectonic granitic plutons ( Corfu, 1993 ; Bleeker, 1999 ; Heather, 2001 ; Ayer et al., 2002a ). Typically north-trending early folds include the broad anticline cored by the Kenogamissi batholith ( Ames et al., 1997 ), F 1 folds with cleavage...

... . Abdel-Rahman , A. M. & Martin , R. F. 1987b . The Deloro anorogenic igneous complex, Madoc, Ontario. I. Geochemistry and feldspar mineralogy of the felsic plutonic rocks . Canadian Mineralogist 25 , 321 – 36 . Abdel-Rahman , A. M. & Martin , R. F. 1990a...

... 2.94 2 92-HNB-68a1 Chester trondhjemite 1 Magnetite-bearing trondhjemite Yeo 427675 5266766 2740 44.26 9.23 0.1261 0.511495 2.6 2.86 2.72 3 92-HNB-26b Somme pluton 1 Layered biotite granite/granodiorite Desrosiers 425681 5292323 2676 17.97 2.85 0.0958 0.510960 2.0...

... in intrusions of <2690 Ma that predate shearing. The data and interpretations presented herein provide a baseline that can be widely utilized in future studies of Au deposits. The Abitibi greenstone belt was constructed during six volcanic episodes (2750–2735 Ma, Pacaud; 2734–2724 Ma, Deloro; 2723–2720 Ma...

... deposits; ( ii ) Fe–Ti, Ni, Cr, and platinum group element (PGE)-bearing magmatic deposits; ( iii ) sedimentary–exhalative (SEDEX) zinc deposits; and ( iv ) IOCG deposits. Application of either the plume model or the crustal-tongue model to anorthosite–mangerite–charnockite–granite (AMCG) plutons...

...–2704 Ma) were hydrated by hot fluids (200–300 ºC), replacing the primary olivine and pyroxenes by serpentine + magnetite. Accretion and thrusting between neighbouring subprovinces was followed by pulses of granitic magmatism between 2692 Ma and 2677 Ma and by the subsequent devolatilization...

... formation was accompanied by widespread emplacement of porphyritic dikes with compositions ranging from trondhjemite to tonalite to granodiorite ( MacDonald et al. 2005 ). As orogeny progressed, adakitic magmas rapidly gave way to quartz syenite – quartz monzonite granite series (“sanukitoid” plutons senso...

... veins. Widespread albite-pyrite-carbonate alteration in all of the gold deposits temporally overlapped with gold mineralization. New U-Pb zircon geochronology data reveal that ~2719 to 2712 Ma volcanism was followed by granitic magmatism and emplacement of a series of ~2683 to 2672 Ma dikes. One Re-Os...

...Yonggang Feng; Iain M. Samson Abstract The Thor Lake rare-element (Y-REE-Nb-Ta-Zr-Be) deposit, Northwest Territories, Canada, is a world-class deposit hosted by alkaline syenite and granite and has two main mineralized zones, namely the Nechalacho and T Zones deposit. The T Zone is shown to have...

... and dolomite, with minor magnetite, whereas the matrix is intensively chloritized. The Abitibi belt, a major subprovince of the Archean Superior Province, is a typical granite–greenstone terrane comprising basalt-dominated supracrustal sequences intruded by granitic plutons. The Abitibi belt has been...