| | Journal (article/letter/editorial) | Publishers B.V., Amsterdam An empirical sapphirine-spinel Mg-Fe exchange thermometer and its application...to high grade xenoliths in the Popes Harbour dyke, Nova Scotia, Canada J. V i c t o r O w e n a a n d...of Geology, Saint Mary's University, Halifax, N.S., B3H 3C3, Canada ~Department of Geological Sciences...University of Saskatchewan, Saskatoon, Sask., S7N OWO, Canada ( Received January 30, 1990; revised and accepted...Greenough, J.D., 1991. An empirical sapphirine-spinel Mg-Fe exchange thermometer and its application | | | Journal (article/letter/editorial) | Analysis of the Weekend Dykes, Eastern Shore, Nova Scotia, Canada Department of Geological Sciences, University...B.C., Canada VI V 1 V7 2 Department of Geology, Saint Mary's University, Halifax, N.S., Canada B3H 3C3...Box 41, Station M, 5112 Prince Street, Halifax, N.S., Canada B3J 2L4 (Received 9 March 1992; revised...as the Weekend dykes, on the Eastern Shore of Nova Scotia contain panidiomorphic textures and mineral (amphibole...distance of 175 km along the Eastern Shore of Nova Scotia (Fig. 1; Ruffman & Greenough, 1990). The dykes | | | Journal (article/letter/editorial) | Ages from a Diorite Xenolith of the Popes Harbour Dyke, Nova Scotia: Implications for Late Ediacaran Arc...Ages from a Diorite Xenolith of the Popes Harbour Dyke, Nova Scotia: Implications for Late Ediacaran Arc...Maryâs University, 923 Robie Street, Halifax, NS B3H 3C3, Canada Correspondence: jarda.dostal@smu.ca ...Northern Appalachians as it is only identified in Nova Scotia. It was thrust over the Avalon terrane during...Hosted within the Late Devonian lamprophyric Popes Harbour dyke of the Meguma terrane are xenoliths of | | | Journal (article/letter/editorial) | plutonic complexes R.H. Mitchell (Thunder Bay, Ont., Canada) ...................................................................... An empirical sapphirine-spinel Mg-Fe exchange thermometer and its application...xenoliths in the Popes Harbour dyke, Nova Scotia, Canada J. Victor Owen (Halifax, N.S., Canada) and J.D. Greenough...Greenough (Sasketoon, Sask., Canada) ................................................. Author Index Volume | | Dostal, Jaroslav, Keppie, Duncan J., Jutras, Pierre, Miller, Brent V., Murphy, Brendan J. (2006) Evidence for the granuliteâgranite connection: Penecontemporaneous high-grade metamorphism, granitic magmatism and core complex development in the Liscomb Complex, Nova Scotia, Canada. Lithos, 86 (1) 77-90 doi:10.1016/j.lithos.2005.04.002 | Journal (article/letter/editorial) | complex development in the Liscomb Complex, Nova Scotia, Canada Jaroslav Dostala,*, Duncan J. Keppieb, Pierre...Geology, Saint Maryâs University, Halifax, Nova Scotia B3H 3C3, Canada Instituto de Geologia, Universidad...Francis Xavier University, Antigonish, Nova Scotia B2G 2W5, Canada b Received 11 June 2004; accepted 14...gneisses and granites of the Liscomb Complex (Nova Scotia, Canada), which are exposed in a core complex within...the CambroâOrdovician Meguma Group of southern Nova Scotia, yielded concordant UâPb zircon/monazite ages | | | Journal (article/letter/editorial) | Lamaque, Bureau 1.02, Val-dâOr, QuĂ©bec J9P 3L4, Canada WALTER E. TRZCIENSKI JR. DĂ©partement de GĂ©ologie...MontrĂ©al, QuĂ©bec H3T 1J4, Canada JEAN H. BĂDARD Commission GĂ©ologique du Canada, C.P. 7500, Ste-Foy, QuĂ©bec...QuĂ©bec G1V 4C7, Canada NORMAND GOULET DĂ©partement des Sciences de la Terre et de lâAtmosphĂšre, UniversitĂ©...201 PrĂ©sident Kennedy, MontrĂ©al, QuĂ©bec H2X 3Y7, Canada ABSTRACT A clast containing sapphirine has been...volcano-sedimentary slivers and rafts. The Douglas Harbour Domain contains the FaribaultâThury tonaliteâtrondhjemite | | | Journal (article/letter/editorial) | V. and Greenough, J.D., An empirical sapphirine-spinel Mg-Fe exchange thermometer and its application...to high grade xenoliths in the Popes Harbour dyke, Nova Scotia, Canada .............................. | | | Journal (article/letter/editorial) | crust beneath the Meguma Lithoiectonic Zone, Nova Scotia: evidence from granulite facies xenoliths G.W...University, Halifax, Nova Scotia, Canada B3H 3J5 z Nova Scotia Department of Mines and Energy, Halifax, Nova...Nova Scotia, Canada B3J 2X1 Received January 29, 1990 / AcceptedApril 24, 1991 Abstract. Granulite-facies...Upper De- vonian lamprophyre dyke near Tangier, Nova Scotia, provide new information about the lower crust...contains garnet + graphite_+ [aluminosilicates + spinel + sapphirine (hight A1103 subgroups A1 and A2)] | | | Journal (article/letter/editorial) | assemblage contains cordierite-biotite-sapphirine-spinel-corundum-K-feldspar. Interpretation of multiphase...with the following reactions: biotite ĂŸ corundum ÂŒ spinel ĂŸ K-feldspar ĂŸ H2 O phlogopite Ă°in biotiteĂ ĂŸ corundum...corundum ÂŒ eastonite Ă°in biotiteĂ ĂŸ spinel ĂŸ cordierite spinel ĂŸ cordierite ÂŒ sapphirine2:2:1 cordierite...biotite ÂŒ cordierite ĂŸ spinel ĂŸ K-feldspar ĂŸ H2 O sapphirine ÂŒ cordierite ĂŸ spinel ĂŸ corundum The PâT evolution...perthite plagioclase quartz sanidine siliimanite spinel talc tremolite Introduction The new sapphirine | | | Journal (article/letter/editorial) | e exchange thermometry), are spinel-sapphirine-biotite-gedrite, spinel-corundum-sapphirine-cordierite...of primary spinel and rutile and/or ilmenite according to the generalised reaction: spinel + ilmenite/rutile...and HzO-contents. The partitioning of Zn between spinel and h6gbomite is not uniform and is considered...upon prevailing fo2 and aH2o. KEYWORDS: h6gbomite, spinel, secondary formation, oxidation, sapphifine-bearing...et al. (1989) and the numerous reports by Grew and co-workers (1987, 1989, 1990), describes the detailed | | | Journal (article/letter/editorial) | enclosed within plagioclase and contains inclusions of spinel and sillimanite, and is locally intergrown with...+ Crn. Temperatures estimated from sapphirine â spinel equilibria lie around 930 â 950ÂșC, suggesting ultrahigh...metamorphism and the nature of uplift. Rarely, sapphirine, spinel, and corundum coexisting with quartz have also...expose gneissic rocks with corundum, sapphirine and spinel. The sub â surface quarries and some of the pits...amphiboles, dark brownish spinel and small grains of plagioclase. Amphibole + spinel and plagioclase â rich | | | Journal (article/letter/editorial) | of gedrite within orthopyroxene associated with spinel, and corroded garnet in a variety of symplecitites...Similarly, fan-shaped patches of finely intergrown spinel + orthopyroxene + cordierite around ragged garnets...isolated from sapphirine by a reaction corona of spinel cordierite, the former nucleating on sapphirine...granular aggregates of cordierite with or without spinel. The widespread breakdown of garnet is evident...and sillimanite are separated by a narrow band of spinel + cordierite which + M I N E R A L CHEMISTRY | | | Journal (article/letter/editorial) | partitioning between coexisting sapphirine and spinel: an empirical geothermometer and its application...C at 800 MPa to grow coexisting sapphirine and spinel-bearing metapelitic assemblages in the KFMASH system...sapphirine-spinel need to be revised upward by 120â160 ° C. Key-words: sapphirine-spinel granulites,...lower crustal conditions, such as the sapphirine-spinel bearing granulites, are instrumental to the interpretation...dataset. In natural systems coexisting sapphirine and spinel have been reported from many high-grade terrains | | | Journal (article/letter/editorial) | Mineralogist, Volume 91, pages 375â384, 2006 Garnet-spinel intergrowths in ultrahigh-temperature granulite...other domain. Lamellar to vermicular intergrowth of spinel solid-solution occurs in garnet, particularly in...porphyroblast. Locally, sapphirine, overgrowing spinel, is also intergrown with garnet. Three possible...garnet-spinel intergrowth: (1) from early stabilized orthopyroxene + sillimanite; (2) spinel forming...Sapphirine is produced by a reaction involving spinel and aluminous pyroxene. Regardless of the exact | | OSANAI, Y., HAMAMOTO, T., MAISHIMA, O., KAGAMI, H. (1998) Sapphirineâbearing granulites and related highâtemperature metamorphic rocks from the Higo metamorphic terrane, westâcentral Kyushu, Japan. Journal of Metamorphic Geology, 16 (1) 53-66 doi:10.1111/j.1525-1314.1998.00064.x | Journal (article/letter/editorial) | sapphirineâ corundumâspinelâcordierite (2) corundumâspinelâcordierite (3) garnetâcorundumâspinelâcordierite (4)...(4) garnetâspinelâgedriteâcorundum, and (5) orthopyroxeneâspinelâgedrite. These metamorphic rocks are...rocks, characteristically containing corundum, spinel and other Al-rich ferromagnesian silicates of cordierite...(sapphirineâcorundumâspinelâcordierite granulite, corundumâspinelâcordierite granulite, garnetâcorundumâ spinelâcordierite...spinelâcordierite granulite, garnetâspinelâgedriteâcorundum granulite and orthopyroxeneâspinel granulite) occur as tectonic | | | Journal (article/letter/editorial) | melting produces peak assemblages orthopyroxene + spinel + quartz + melt and orthopyroxene + sapphirine...sapphirine + orthopyroxene + quartz + cordierite + spinel directly from F-rich biotite as a consequence of...(2000). The rock contains abundant orthopyroxene, spinel, cordierite, quartz, perthite (only in the leucosome...migmatite consists of orthopyroxene, sillimanite, spinel, sapphirine and cordierite, whereas the leucosome...porphyroblastic phase that forms aggregates with spinel + cordierite + quartz and sapphirine + cordierite | | | Journal (article/letter/editorial) | replaced by a symplectite of plagioclase, corundum, spinel and sapphirine. The sapphirine is amongst the most...eclogite is often replaced by a plagioclase" corundumq spinel " sapphirine symplectite Ćœe.g., Matthes et al....symplectite (S2 in Fig. 1a,b): Spinel has a composition intermediate between spinel ĆœMgAl 2 O4 . and hercynite...ratio equal to 0.49 ĆœTable 1.. As for corundum, spinel vermicules are disposed radially and perpendicular...irregular strip at the rim of the kyanite pseudomorph. Spinel also occurs in this outer zone. Plagioclase is | | | Journal (article/letter/editorial) | granites and ash-flow tufts (Montel et al., 1986). Spinel-bearing assemblages have been interpreted as products...Weber C, Pichavant M (1986) Biotite-sillimanite-spinel assemblages in highgrade metamorphic rocks: occurrences...JA, Greenough JD (1991) An empirical sapphirine-spinel M g-Fe exchange thermometer and its application...to high grade xenoliths in the Popes Harbour dyke, Nova Scotia, Canada. Lithos 26:317-332 Paolionieo A | | | Journal (article/letter/editorial) | characterized by UHT assemblage(s) sapphirine + quartz, spinel + quartz and sapphirine + orthopyroxene + quartz...suite. The mafic granulite itself and the associated co-deformed enderbitic gneiss record the postpeak near-isobaric...documented intergrowth textures involving garnetâspinelâsapphirine in coarse garnet porphyroblast from...+ cordierite + orthopyroxene + sillimanite and spinel + quartz + orthopyroxene were stabilized in domain...thermometer on coexisting sapphirine and spinel (Das et al., 2006a) from spinel-bearing assemblage of Bose et al | | | Journal (article/letter/editorial) | of Geology, Saint Maryâs University, Halifax, Nova Scotia, Canada B3H 3C3 Department of Earth Sciences...University of Western Ontario, London, Ontario, Canada N6A 5B7 c Department of Geology, Okanagan University...University College, Kelowna, British Columbia, Canada V1V 1V7 b Received 19 September 2002; accepted 14...corundum, spinel and/or sillimanite. Quartz occurs locally, but never in contact with corundum, spinel or sapphirine...Ilmenite occurs in a few samples. Spinel of the hercynite-common spinel series is comparatively rare, but | | | Journal (article/letter/editorial) | com/locate/gr Experimental calibration of sapphirineâspinel Fe 2+ âMg exchange thermometer: Implication for...distribution coefficients between sapphirine and spinel: KD ÂŒ Spr X Spl Fe X Mg Spr X Spl Mg X Fe ; ...+ Mg); XFe = Fe / (Fe + Mg)]. A new sapphirineâ spinel geothermometer has been obtained as: lnKD ÂŒ â1:257...reserved. Keywords: Fe2+âMg partitioning; Sapphirineâspinel exchange thermometer; Ultrahigh-temperature (UHT)...and spinel is commonly observed as a mineral assemblage of sapphirine corona that encloses spinel grains | | TAMASHIRO, Iwao, SANTOSH, M., SAJEEV, K., MORIMOTO, Taro, TSUNOGAE, Toshiaki (2004) Multistage orthopyroxene formation in ultrahigh-temperature granulites of Ganguvarpatti, southern India: implications for complex metamorphic evolution during Gondwana assembly. Journal of Mineralogical and Petrological Sciences, 99 (5) 279-297 doi:10.2465/jmps.99.279 | Journal (article/letter/editorial) | â 7.5 wt%) while orthopyroxenes associated with spinel possess values between 7.3 â 7.5 wt%. Late orthopyroxene...8 kbar and those associated with sapphirine and spinel symplectites show 850 â 900°C at a pressure around...orthopyroxene â sillimanite â quartz association (4) spinel â quartz direct association (5) presence of aluminous...consist mainly of garnet, cordierite, sillimanite and spinel. The Opx â Sil â Qtz granulite at Ganguvarpatti...values (6.9 â 7.5 wt%) while those associated with spinel possess values between 7.3 â 7.5 wt%. Late orthopyroxene | | | Journal (article/letter/editorial) | The enclave contains a disrupted layer of black spinel-orthopyroxene-phlogopite gneiss, which was truncated...composed of a sequence of mineral zones that contain spinel, orthopyroxene, sapphirine, cordierite and plagioclase...surrounding sapphirine and sapphirine surrounding spinel. The growth of the reaction band was controlled...pale brown orthopyroxene (60±70 modal%) and green spinel (30±35 modal%). Orthopyroxene grains have polygonal...anhedral forms, and are larger (0.3±0.6 mm) than spinel grains (0.1±0.4 mm). A few samples (e.g. RUM11) | | Dasgupta, , Sengupta, , Sengupta, PR., Ehl, , Raith, (1999) Petrology of gedrite-bearing rocks in mid-crustal ductile shear zones from the Eastern Ghats Belt, India. Journal of Metamorphic Geology, 17 (6) 765-778 doi:10.1046/j.1525-1314.1999.00226.x | Journal (article/letter/editorial) | 767 Table 1. Representative chemical analyses of co-existing minerals in enderbitic gneiss. Mineral Sample...more of quartz, biotite, ilmenite, plagioclase and spinel. Quartz and plagioclase form a coarse polygonal...composition to the rims of the porphyroblasts. Spinel included in the garnet is hercynite-rich with negligible...anor2 3 Table 3. Representative chemical analyses of co-existing minerals in leptynite. Mineral Sample Type...designated as orthopyroxene (Opx ). P P This mineral co-exists with garnet and cordierite but not with sillimanite | | | Journal (article/letter/editorial) | (2006) 524 â 536 www.elsevier.com/locate/lithos Spinelâsapphirineâquartz bearing composite inclusion within...of quartz, plagioclase, K-feldspar, sapphirine, spinel, orthopyroxene, and biotite, in porphyroblastic...four occurrences: (1) as anhedral mineral between spinel and quartz (Spr-1), (2) subhedral to euhedral needles...and P > 10 kbar during peak metamorphism. Coarse spinel (Spl-1) with irregular grain morphology and adjacent...of the rock shifted from the stability field of spinel + quartz to sapphirine + quartz. Petrogenetic grid |
|