 | | Report (chapter) | | Université Laval on July 10, 2015 Glaucophane and barroisite eclogites from the Upper Kaghan nappe: implications...and mineral chemical study of glaucophane- and barroisite-bearing eclogites from the Upper Kaghan nappe...glaucophane eclogite and garnet-omphacite-zoisiterutile _+kyanite _+phengite _+ankerite in barroisite eclogite...peak assemblage and is barroisite in most samples, but in relatively Fe-rich eclogite it is glaucophane with...Garnet displays strong prograde zoning in the barroisite eclogites, with Mg increasing and Fe decreasing |  | | Report (chapter) | | glaucophane-bearing eclogite, and 16 kbar at 600 + 50 8C for the Tin Hama phengite eclogite, values indicative...medium-temperature metamorphic overprint characterized by barroisite–paragonite assemblages; that is, of same grade...high-pressure metamorphism. We describe here the first occurrence of Precambrian glaucophane sensu stricto and...metapelites and quartz-schists, with the local occurrence of Mn-rich garnet in metapelites and of pale...the east of the Bourré massif. The ubiquitous occurrence of phengite þ garnet þ rutile mineral assemblages |  | | Journal (article/letter/editorial) | | Petrology of the nyb6ite-bearing eclogite in the Donghai area, Jiangsu Province, eastern China T . HIRAJIMA...Geology and Mineralogy, Kyoto University, Kyoto 606, Japan R. ZHANG, J. Ll AND B. CONG Institute of Geology...Nyb6ite occurs as porphyroblasts in the Jianchang eclogite in the Donghai area, northeastern Jiangsu Province...Province, eastern China. The Jianchang eclogite contains some inclusions of quartz after coesite in clinopyroxene...associated with jadeitic pyroxene in the Jianchang eclogite, although other porphyroblastic amphiboles in | | | Journal (article/letter/editorial) | | Petrology of the nyb6ite-bearing eclogite in the Donghai area, Jiangsu Province, eastern China T . HIRAJIMA...Geology and Mineralogy, Kyoto University, Kyoto 606, Japan R. ZHANG, J. Ll AND B. CONG Institute of Geology...Nyb6ite occurs as porphyroblasts in the Jianchang eclogite in the Donghai area, northeastern Jiangsu Province...Province, eastern China. The Jianchang eclogite contains some inclusions of quartz after coesite in clinopyroxene...associated with jadeitic pyroxene in the Jianchang eclogite, although other porphyroblastic amphiboles in |  | | Journal (article/letter/editorial) | | s ev i e r. c o m / l o c a t e / l i t h o s Eclogite from the ultrahigh-pressure metamorphic unit at...Cignana ransmission electron microscopy Coesite–eclogite Crystal defects Omphacite Amphibole a b s t r...metamorphism. We have studied the minerals of two eclogite samples from this unit using transmission electron...our TEM-study we found omphacite, amphibole (barroisite, glaucophane, hornblende), clinozoisite, garnet...deformation microstructures from the UHP Lago di Cignana eclogite and other HP occurrences, it is unlikely that |  | John, Timm, Scherer, Erik E., Schenk, Volker, Herms, Petra, Halama, Ralf, Garbe-Schönberg, Dieter (2010) Subducted seamounts in an eclogite-facies ophiolite sequence: the Andean Raspas Complex, SW Ecuador. Contributions to Mineralogy and Petrology, 159 (2) 265-284 doi:10.1007/s00410-009-0427-0 | Journal (article/letter/editorial) | | -0 ORIGINAL PAPER Subducted seamounts in an eclogite-facies ophiolite sequence: the Andean Raspas Complex...Lu–Hf ages of a blueschist, a metapelite, and an eclogite overlap at around 130 Ma and date high-pressure...exhibit seamount-like characteristics, and the eclogite-facies peridotites seem to represent depleted...Germany e-mail: timm.john@uni-muenster.de MORB-type eclogite, seamount-type blueschist, serpentinized peridotite...ophiolite Seamount subduction Blueschist Eclogite Serpentinite Slab dismembering Earthquakes |  | | Journal (article/letter/editorial) | | metamorphism. Assemblages range from well-preserved eclogite, with minor growth of Na±Ca amphibole, to strongly...laser-probe analyses on rock chips from a well-preserved eclogite and a slightly retrogressed one reveal the presence...rutile ages obtained from the same well-preserved eclogite sample suggest that the oldest Na±Ca amphibole...that there was about a 10-Ma interval between the eclogite facies stage (at ³1.5 GPa) and the Ca amphibole-hydration...applied to amphibole from one of the well-preserved eclogite samples previously investigated by the Sm±Nd and |  | | Journal (article/letter/editorial) | | homepage: http://www.tandfonline.com/loi/tigr20 Eclogite varieties and petrotectonic evolution of the northern...Martens, Tatsuki Tsujimori & Juhn G. Liou (2016): Eclogite varieties and petrotectonic evolution of the northern...http://dx.doi.org/10.1080/00206814.2016.1245592 Eclogite varieties and petrotectonic evolution of the northern...Sendai, Japan ABSTRACT ARTICLE HISTORY Field and petrologic characteristics of two new eclogite localities...locality exposes a coherent body of retrogressed eclogite hundreds of metres long that is associated with |  | | Journal (article/letter/editorial) | | multiplicity faults in deformed omphacite from eclogite WOLFGANG FRIEDRICH MÜLLER1*, FRANK E. BRENKER2...Abstract: Deformed and recovered omphacite from an eclogite sample of the Lower Schist Cover of the Tauern...acting as slip planes is given. The frequent occurrence of CMFs in omphacite suggests that 1/2[011](010)...Tauern Window. 1. Introduction The rheology of eclogite plays a major role in subduction zones (see, e...their fabric and microstructural study of four eclogite samples representative of different strain types |  | | Report (chapter) | | February 27, 2015 Fluid-mediated alteration of eclogite lenses in subduction complexes: a case from the...emplacement of the composing units. Recognition of the eclogite-bearing mélange character of the BC (Săbău...types could be distinguished in the BC: (a) common eclogite (some occurrences described by Gherasi et al....derived eclogites (Săbău 2000); (b) Cr-bearing eclogite (Costin & Luffi 2001; Negulescu et al. 2007) consisting...SĂBĂU & Săbău 2012); (c) (meta)gabbronorite and eclogite representing E-MORB-derived rocks (Negulescu et |  | | Journal (article/letter/editorial) | | region of the central Tauern Window, east of the Eclogite Zone. A four-stage metamorphic evolution has been...570°C, slightly below those reported from the Eclogite Zone (around 600°C, 20 kbar). In several instances...occurred during uplift, apparently still within the eclogite facies (stage III). As it is impossible to reconcile...(symplectite formation), transformed most of the eclogite bodies into garnet amphibolites and even greenschists...most evidence of the earlier PT-path. Evidence of eclogite-facies metamorphism of the country rocks has been |  | | Journal (article/letter/editorial) | | 1111/jmg.12089 Coexistence of garnet blueschist and eclogite in South Tianshan, NW China: dependence of P–T...cn) ABSTRACT Coexisting garnet blueschist and eclogite from the Chinese South Tianshan high-pressure...hornblendic amphibole with or without paragonite. Eclogite assemblages generally contain omphacite >50 vol...absent in the matrix. The coexisting blueschist and eclogite show dramatic differences in the bulk-rock compositions...A/CNK [=Al2O3/(CaO + Na2O + K2O)] (0.35– 0.56) in eclogite, but with lower X(CaO) (0.09–0.30) and higher |  | Di Vincenzo, G., Palmeri, R., Talarico, F., Andriessen, P.A.M., Ricci, G.A. (1997) Petrology and Geochronology of Eclogites from the Lanterman Range, Antarctica. Journal of Petrology, 38 (10) 1391-1417 doi:10.1093/petroj/38.10.1391 | Journal (article/letter/editorial) | | remains unconstrained. In the well-preserved eclogite samples the reaction textures testify to three...three main metamorphic stages: (1) an eclogite facies stage, (2) a medium-pressure amphibolite facies stage...data place both the formation and exhumation of eclogite within a convergent plate margin setting, thus...chronology; eclogite; high-pressure metamorphism; Ross Orogen INTRODUCTION Metabasites with eclogite assemblages...38 during the high-pressure event (the in situ eclogite model) or whether the mafic eclogites were tectonically |  | Bröcker, Michael, Fotoohi Rad, Gholamreza, Burgess, Ray, Theunissen, Stephanie, Paderin, Ilya, Rodionov, Nikolay, Salimi, Zohre (2013) New age constraints for the geodynamic evolution of the Sistan Suture Zone, eastern Iran. Lithos, 170. 17-34 doi:10.1016/j.lithos.2013.02.012 | Journal (article/letter/editorial) | | schists. Some mélange blocks were affected by eclogite-, blueschist- and/or epidote amphibolite-facies...epidote-biotite assemblage in an overprinted domain of an eclogite. Ion probe U\Pb zircon ages for two eclogites...m in size) blocks and lenses were affected by eclogite-, blueschist- and/or epidote amphibolite-facies...data of white mica and calcic amphibole from four eclogite and amphibolite facies samples indicated a considerable...blueschists and epidote amphibolites Major eclogite occurrence Orbitolina limestone (Lower Cretaceous) |  | | Journal (article/letter/editorial) | | interstitial copper mineralization. The only other eclogite occurrence recorded in Brazil, at Pouso Alegre, state...paper. The comparison with the only other eclogite occurrence known in Brazil (Hoppe et al., 1989), and...and with the cupriferous titanomagnetite ore occurrence at Serrote da Lage, state of Alagoas (Horbach and...geological setting. The Fazenda Boa Esperan~a-Bodoc6 occurrence Some lenses of metamorphosed mafic to ultramafic...Bodooco STAGES Igneous M Garnet Hornblende Barroisite Omphacite(P-2) Zoisite Phengite Rutile Apatite |  | Stanek, Klaus P., Maresch, Walter V., Scherer, Erik, Krebs, Martin, Berndt, Jasper, Sergeev, Sergey S., Rodionov, Nikolay, Pfänder, Jörg, Hames, Willis E. (2019) Born in the Pacific and raised in the Caribbean: construction of the Escambray nappe stack, central Cuba. A review. European Journal of Mineralogy, 31 (1) 5-34 doi:10.1127/ejm/2019/0031-2795 | Journal (article/letter/editorial) | | in the Yayabo amphibolites and 25 kbar in the eclogite-bearing Gavilanes Unit. The diachronous timing...Hertwig et al., 2016). In the second type of occurrence (see Fig. 1a), the oceanic subduction-accretionary...serpentinized ultramafic rocks surrounding rare blocks of eclogite (e.g., Garcı́a-Casco et al., 2002), shown as the...Escambray Mountains expose the largest contiguous occurrence of metamorphic rocks along the northern Caribbean...Felicidad Formation (Somin & Millan, 1974; (2) Occurrence of jadeite-rich blueschists in the SSD (Somin |  | | Journal (article/letter/editorial) | | metamorphic rocks, including garnet peridotite, eclogite, HP granulite, and HP amphibolite, are important...garnet amphibolite, 358 F 10 Ma, two samples of eclogite, 341 F 8 and 344 F 7 Ma, and garnet peridotite...Application of commonly accepted thermobarometers to eclogite (grt + cpx F ky F phn F pg F zo) yields a range...2003 Elsevier B.V. All rights reserved. Keywords: Eclogite; Garnet peridotite; Sm – Nd geochronology; Variscan;...Variscan; South Carpathians 1. Introduction Eclogite facies metamorphism is a well-documented feature |  | Halama, Ralf, John, Timm, Herms, Petra, Hauff, Folkmar, Schenk, Volker (2011) A stable (Li, O) and radiogenic (Sr, Nd) isotope perspective on metasomatic processes in a subducting slab. Chemical Geology, 281 (3) 151-166 doi:10.1016/j.chemgeo.2010.12.001 | Journal (article/letter/editorial) | | December 2010 Editor: B. Bourdon Keywords: Subduction Eclogite Metasomatism Seafloor alteration Lithium isotopes...High-pressure (HP) minerals from this type of eclogite have highly variable oxygen isotope compositions...MORB-type rocks. Zoisite eclogites, the second eclogite type from the Raspas Complex, are characterized...(Fig. 1) and constitutes the only known eclogite occurrence among the Andean HP rocks (Arculus et al... and the El Toro Formation, which consists of eclogite-facies, serpentinized peridotites (Feininger, |  | | Book | | developed in the marginal areas of the Pacific Ocean in Japan, Kamchatka and the Koryak Mts. (Fig. 5), Alaska...crystallinity degree of illite) ; and on the occurrence of mineral pairs which may show a variable composition...low-pressure portion the boundary is indicated by the occurrence of orthopyroxene, enstatite and diopside instead...garnet-amphibolites, granulite facies and part of the eclogite facies. 4. Facies series of high-pressure metamorphism...the lower grades and of omphacite with garnet (eclogite facies) at the higher grades. According to the |  | | Book | | pipes. Rao and Phadtre (1963) report the occurrence of eclogite and peridotite xenoliths from this locality...strongly suggests it is heazelwoodite (Ni3S2). The occurrence of this phase is believed to be due to late stage...original olivine (0.2 - 0.3 wt% NiO). The geological occurrence, plus the petrographic character of these rocks...of Tokyo, Roppongi 7-22-1, Minato-ku, Tokyo 106, Japan) Pyroxene-garnet solid solution equilibria have...correlation in time and place between kimberlite occurrence and large-scale volcanic activity (such as the |  | | Book (volume) | | ..................... Diamond and Graphite in Eclogite Xenoliths From Kimberlite, Derek N. Robinson... XENOLITHS FROM THE COLORADO 300 PLATEAU Eclogite,PyroxeniteandAmphiboliteInclusions in the SullivanButtesLatite.......... 345 Garnet Clinopyroxenite- Chlorite Eclogite Transition in a Xenolith From MosesRock: Further...anelasticity structure beneath western South America and Japan, Phys. Earth Planet. Interiors• 9, 211-219, 1974...close to Cpx+Pypwould lose [Opx] and become an "eclogite" and a compositionclose to Opx+Pyp would lose |
|
