| | Journal (article/letter/editorial) | 2000, 18, 79ā90 Hydration of eclogite, Pam Peninsula, New Caledonia C . J. C A R SON , 1, * G . L . C L...barroisite-bearing eclogite facies metabasites in northern New Caledonia. The mineralogical evolution can be modelled...P#9 kbar. Key words: eclogite; glaucophanite; New Caledonia; pseudosection. I N T R O D U C T IO N Garnet...located on the Pam Peninsula, northern New Caledonia (Fig. 1a). Rocks of the Pam Peninsula have been divided...Department of Geology and Geophysics, Yale University, New Haven, Connecticut 06511, USA. Ā© Blackwell Science | | | Journal (article/letter/editorial) | metamorphic sequence? New high-spatial resolution petrological data for the New Caledonia case study A. Vitale...2013 Abstract The metamorphic belt of northern New Caledonia represents one of the best-exposed example...as major tectonic discontinuities. We present a new and extensive metamorphic dataset acquired by means...7193, UPMC Sorbonne UniversiteĢs, 75005 Paris, France e-mail: alberto.vitale-brovarone@impmc.upmc.fr...GeĢosciences Montpellier, UMR 5243, 34095 Montpellier, France Present Address: A. Vitale Brovarone IMPMC, CNRS-IRD | | | Journal (article/letter/editorial) | evolution of peridotites and serpentinites of NE New Caledonia: prograde interaction between continental margin...ABSTRACT The PoueĢbo and Diahot terranes of NE New Caledonia mostly comprise eclogite to blueschist facies...been linked with the SW-directed obduction of the New Caledonian Ophiolite, an extensive ultramaļ¬c nappe...Serpentinite emplacement accompanied burial of the NE New Caledonian margin at T<500 C and P<16 kbar. The...olivine was stable and coarse-grained garnetāomphacite-rich assemblages developed in low strain domains | | | Journal (article/letter/editorial) | eclogite facies mineral equilibria, Pam Peninsula, New Caledonia B. A. MARMO, 1 G. L. CLARKE 1 A N D...maps collected using eclogite samples from northern New Caledonia in order to determine the chemical composition...proportions and mineral textures observed in the New Caledonian eclogites can be closely modelled by progressively...assemblages. Keywords: eclogite; mineral equilibria; New Caledonia; NCFMASH; pseudosection. IN TROD UCTI ON Metamorphic...chemical composition of its equilibrium-volume. In the New Caledonian eclogites, inclusions of lawsonite, chlorite | | TSUJIMORI, T, SISSON, V, LIOU, J, HARLOW, G, SORENSEN, S (2006) Very-low-temperature record of the subduction process: A review of worldwide lawsonite eclogites. Lithos, 92 (3) 609-624 doi:10.1016/j.lithos.2006.03.054 | Journal (article/letter/editorial) | History, Central Park West at 79th Street, New York, New York 10024-5192, USA Department of Mineral Sciences...lawsonite-eclogite facies mineral assemblages (garnet + omphacite + lawsonite + rutile) typically occur in prograde-zoned...assemblages are Early Paleozoic in Spitsbergen and the New England fold belt of Australia; this suggests that...āeclogiteā for any metabasite in which garnet and omphacite are present as an equilibrium assemblage, regardless...Brueckner et al. (2005) reported NdāSm garnetā omphaciteāwhole rock isochron ages of 132 Ma for peak eclogite-facies | | | Journal (article/letter/editorial) | in the context of high-P Eocene rocks in northern New Caledonia (Fitzherbert et al., 2005). The pseudosections...HIGH-P ROCKS IN NORTHERN NEW CALEDONIA High-P rocks of the Pam Peninsula in NE New Caledonia can be divided...The Diahot metabasites change from lawsoniteāomphaciteāglaucophane-bearing assemblages (zone 1; 7ā10...and ļ¬nally to clinozoisiteāalmandineāhornblendeāomphacite-bearing assemblages (zones 3 & 4; 16ā18 kbar,...assem- blages (zone 2) to almandineāepidoteāomphaciteāalbite-bearing assemblages (zone 3; NE). Mineral | | | Journal (article/letter/editorial) | 1093/petrology/egg060 Lawsonite---Omphacite-Bearing Metabasites of the Pam Peninsula, NE New Caledonia: Evidence for Disrupted...lawsonite--albite-bearing schists in the SW and omphacite--garnet-bearing schists in the NE. The Diahot...all rights reserved The Diahot terrane of NE New Caledonia contains an interbedded sequence of Cretaceous...lowest-grade parts of the Diahot terrane contain M1 omphacite, chlorite, lawsonite and glaucophanebearing assemblages...are divided into four zones: (1) lawsonite---omphacite; (2) lawsonite---clinozoisite---spessartine; (3) | | | Journal (article/letter/editorial) | application to the PoueĢbo Terrane, Pam 2 3 2 2 Peninsula, New Caledonia C . J . C A R S O N1, R . POW EL...medium-T PoueĢbo terrane of the Pam Peninsula, northern New Caledonia includes barroisite- and glaucophane-bearing...words: CNFMASH; eclogites; H O availability; New Caledonia; pseudosections. 2 I NTR O D U CT I O N The...of GoĢmezPugnaire et al. (1997; Nerkau Complex, northern Urals) and Meyre et al. (1997; Adula Nappe, Central...metabasic eclogites of the PoueĢbo terrane, New Caledonia. As a basis for this, a quantitative petrogenetic | | | Journal (article/letter/editorial) | com/locate/lithos High-pressure veins in eclogite from New Caledonia and their significance for fluid migration in...eclogite in the PouĆ©bo Eclogite Melange of northern New Caledonia. Isotopic and geochemical evidence indicates...garnetāquartzāphengite veins that are enveloped by garnet-poor, omphacite-rich selvages or bleach zones. Petrography, thermometry...Elsevier B.V. All rights reserved. Keywords: New Caledonia; Eclogite; Veins; Subduction; Fluid flow 1...the blueschistāeclogiteāfacies belt of northern New Caledonia. In this work, we outline the petrology | | | Journal (article/letter/editorial) | record of high-pressure metasedimentary rocks of New Caledonia: Implications for regional tectonics of the...record of highpressure metasedimentary rocks of New Caledonia: Implications for regional tectonics of the...record of high-pressure metasedimentary rocks of New Caledonia: implications for regional tectonics of the...high-pressure metamorphic belt of CE Northern New Caledonia. We use these data to evaluate the sedimentary...eastwards and accumulated into the East RI New Caledonia Basin. Palaeozoic and Precambrian zircon grains | | | Journal (article/letter/editorial) | metabasite during exhumation, Diahot terrane, NE New Caledonia J.A. Fitzherberta,T, G.L. Clarkea, R. Powellb...High-P metabasites of the Diahot terrane, NE New Caledonia occur as spatially restricted (cm to km-scale)...assemblages in the metabasites range from lawsoniteāomphaciteāglaucophane-bearing assemblages (Zone 1; P=7ā10...finally to clinozoisiteāalmandineāhornblendeāomphacite-bearing assemblages (Zones 3 and 4; P=16ā18 kbar...biteāchlorite (Zone 2) and almandineāepidoteāomphaciteāalbitebearing (Zone 3) lithologies. Mineral inclusion | | | Journal (article/letter/editorial) | insights from high-pressure mafic rocks from New Caledonia Carl Spandler a,*, JoĢrg Hermann b, Richard...blueschist and garnet amphibolite rocks from northern New Caledonia has been determined in order to geochemically...with equivalent igneous rocks from western New Caledonia demonstrates that the main chemical variations...All rights reserved. Keywords: Subduction; New Caledonia; Oceanic crust; Trace elements; Metamorphism;...eclogite-facies mafic rocks from northeastern New Caledonia. These rocks are part of an extensive high-P | | | Journal (article/letter/editorial) | eclogite regional deformation/metamorphism in New Caledonia, as indicated by progressively developed porphyroblast...Department of Geology, University of Auckland, Auckland, New Zealand Abstract. The mid-Tertiary blueschists,... eclogites and eclogitic gneisses of northern New Caledonia are the products of four phases of regional...regional metamorphism and deformation (D,--D4).Omphacite, lawsonite and Mn-rich garnet isogradic surfaces...T-prograde metamorphic environment of the D, phase, omphacite altered to albite and chlorite; as a result, a | | | Journal (article/letter/editorial) | NCKMnFMASHO system to contain glaucophane, garnet, omphacite, lawsonite, phengite and quartz, with chlorite...controlled by lawsonite + omphacite = glaucophane + epidote + H2O. Lawsonite and omphacite breakdown will be...proportions in true eclogite (i.e. rocks with garnet + omphacite >70%). However, further evaluation is required...law ā lawsonite, mu ā phengitic muscovite, o ā omphacite, pl ā plagioclase, q ā quartz, ta ā talc, tn ā...presenting a useful barometer. However, in the omphacite-absent assemblages, i.e. glāgāchlālaw ā ep and | | | Journal (article/letter/editorial) | Paragneisses between Yambe and Cape Colnett, New Caledonia by E. D. GHENT, 1 P. M. BLACK, 2 R. N. BROTHERS...coastal belt, 175 km by 35 km, in northeastern New Caledonia. Metamorphic grade ranges from lawsonite-albite...schists through glaucophane-epidote schists to omphacite-garnet-quartz gneisses. In the eclogitic terrane...albite-epidote-garnet Ā± glaucophane and barroisite. Omphacite is partly retrogressed to albite and ferromagnesian...thermometry between omphacite and garnet suggests temperatures between 520 and 600 Ā°C. Omphacite + quartz (mol | | | Journal (article/letter/editorial) | high-pressure/lowtemperature vein system in eclogite from New Caledonia: insights into intraslab fluid flow processes...rocks of the PoueĢbo Eclogite Melange (northern New Caledonia) records the prograde blueschist-to-eclogite...geochronology Mass-balance calculations New Caledonia Communicated by Othmar MuĢntener. Electronic...of the PoueĢbo Eclogite MeĢlange (PEM), NE New Caledonia. This HP/LT meĢlange zone represents an excellent...transition in a subducting slab. Geological setting New Caledonia (Fig. 1), located in the south-western Pacific | | | Journal (article/letter/editorial) | similar mineral assemblages involving garnet, omphacite, glaucophane, epidote, phengite, rutile/sphene...paragonite. Eclogite assemblages generally contain omphacite >50 vol.% and a small amount of glaucophane (<5...glaucophane over 30 vol.% with a small amount of omphacite which is even absent in the matrix. The coexisting...results in epidote growth, glaucophane increase and omphacite decrease in the blueschist, or in an overprinting...Corsica (Caron & Pequignot, 1986) and Pam Peninsula in New Caledonia (Clarke et al., 1997). In many cases | | Tsujimori, T., Matsumoto, K., Wakabayashi, J., Liou, J. G. (2006) Franciscan eclogite revisited: Reevaluation of the PāT evolution of tectonic blocks from Tiburon Peninsula, California, U.S.A. Mineralogy and Petrology, 88 (1) 243-267 doi:10.1007/s00710-006-0157-1 | Journal (article/letter/editorial) | PāT evolution of tectonic blocks from Tiburon Peninsula, California, U.S.A. T. Tsujimori1 , K. Matsumoto2...mineral assemblage contains prograde-zoned garnet Ć¾ omphacite Ć¾ epidote hornblende (katophoritic and barroisitic...stable in the eclogite stage. New calculations based on garnet-omphacite-phengite thermobarometry and...2ā2.5 GPa and T Ā¼ 550ā620 C; porphyroclastic omphacite with inclusions of garnet and paragonite yields...Available geochronologic data combined with our new insight for the maximum pressure suggest an average | | Chen, Y., Ye, K., Wu, T. F., Guo, S. (2013) Exhumation of oceanic eclogites: thermodynamic constraints on pressure, temperature, bulk composition and density. Journal of Metamorphic Geology, 31 (5) 549-570 doi:10.1111/jmg.12033 | Journal (article/letter/editorial) | a typical peak mineral assemblage of garnet + omphacite + lawsonite + coesite + phengite + rutile glaucophane...have a typical mineral assemblage of garnet + omphacite + lawsonite + glaucophane + phengite + quartz...29ā0.38 12 Samana, Dominica Republic Pam Peninsula, New Caledonia 1.6/360 g + o + law + gl + pa + phe...21 22 23 24 25 Abbreviations: g: garnet; o: omphacite; law: lawsonite; law*: lawsonite pseudomorph;...usually have a peak mineral assemblage of garnet + omphacite + epidote + amphibole (glaucophane, barroisite | | | Journal (article/letter/editorial) | high-pressure, low-temperature metamorphic rocks from New Caledonia. Samples examined include maļ¬c and pelitic rocktypes...trace-element hosts. Chlorite, albite, amphibole and omphacite contain very low concentrations of the investigated... but are also responsible for the generation of new crust in associated magmatic arcs (Taylor and McLennan...geological map of the high-pressure belt of northern New Caledonia. Also shown are the location of samples...during mineral dehydration. In north-eastern New Caledonia lies one of the worldās largest and most continuous | | | Journal (article/letter/editorial) | characterized by different modal amounts of amphibole, omphacite, zoisite, garnet, and phengite, constituting the...degree of fabric evolution. This is the case for omphacite occurrence, which is constrained by plagioclase...the protoliths, whereas the increase in modal omphacite and the concomitant decrease in modal amphibole...values, the co-existence of amphibole with garnet, omphacite, and epidote occurs only for low-to-medium strain...exclusively as armoured inclusions in garnets and omphacite porphyroclasts. Thus, amphibole persists in the | | Brown, Julie L, Dyer, Sabastien C, Mungall, James E, Christy, Andrew G, Ellis, David J (2020) High-pressure CuāFeāS Phase Equilibria: some Experimental and Thermodynamic Constraints on Sulfides in Subduction Zones and the Lithospheric Mantle. Journal of Petrology, 61 (4) doi:10.1093/petrology/egaa043 | Journal (article/letter/editorial) | GPa, and pyrite Ć¾ bornite at 19 GPa, observed in New Caledonian rocks, is precluded by tie-lines between...reaction between 10 and 17 GPa, being replaced by a new assemblage of bornite, pyrite, and pyrrhotite. Our...GPa, 500 C and dominates assemblages in the omphacite mineral zone from 15 to 17 GPa, and from 550...Location map of the high-pressure belt in northern New Caledonia showing the positions of silicate isograds...(cād). Pyrrhotite dominates assemblages in the omphacite zone, and is copper-rich in metabasaltic rocks | | | Journal (article/letter/editorial) | associated with blueschists and eclogites, northern New Caledonia EDWARD D. GHENT AND MAVIS Z. STOUT, Department... University of Auckland, Private Bag, Auckland, New Zealand Abstract. Chloritoid-bearing metasedimentary...Tertiary high-pressure metamorphic belt of northern New Caledonia. The typical assemblage of chloritoid-bearing...quartzchlorite-muscovite-garnet-chloritoid. In the omphacite zone, epidote is an additional member of the chloritoid-bearing...an upper temperature limit near 560" C in the omphacite zone and a minimum temperature limit near 450" | | | Journal (article/letter/editorial) | eclogite has a peak mineral assemblage of garnetļ¼omphaciteļ¼glaucophaneļ¼epidoteļ¼quartzļ¼ rutile Ā± phengite...calculated phase diagram, a trivariant field of garnetļ¼omphaciteļ¼glaucophaneļ¼zoisite occurs within the high-pressure...high-pressure divariant field of garnetļ¼omphaciteļ¼ glaucophaneļ¼hornblendeļ¼sensu latoļ¼ ļ¼zoisite - it is consistent...blueschists from the Ile de Groixļ¼Armorican Massif, Franceļ¼ :a potential geobarometer. Jour. Metam. Geol.... application to the PouĆ©bo Terrane, Pam Peninsula, New Caledonia. Jour. Metam. Geol., 17, 9-24. Carson | | | Journal (article/letter/editorial) | of barroisitic amphibole in an eclogite from New Caledonia, to examine aspects of equilibration during...they are not suitable for use in petrology. The new generation of fast personal computers offers the...housed at the Electron Microscope Unit, University of New South Wales. Standard operating procedures involved...appropriatesized matrix for the element map. The new matrix is then presented graphically in Matlab using...on the different standards need to be entered and new b-factors for these standards need to be calculated |
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