 | | Journal (article/letter/editorial) | | fluids during retrograde metamorphism of eclogite-facies rocks ( Voltri Massif, Italian Western Alps) F. Vallis...Scienze della Terra, Corso Europa 26, 16132 Genoua, Italy Received 9 October 1995; accepted 15 May 1996 ...containing titanoclinohumite) and eclogites from the Voltri Massif (Ligurian Western Alps) retain primary,...re-equilibration of a fluid presumably trapped at eclogite-facies conditions. The inclusions kinetically...are retained in primary fluid inclusions within eclogite facies minerals crystallized in veins and in the |  | | Journal (article/letter/editorial) | | meta-ophiolites of Western Liguria (Italy), serpentinized ultramaÂŽtes host bodies of eclogite, metarodingite and...UniversitaĂ di Genova, Corso Europa 26, I-16132 Genova, Italy Tel.: 0039 10 3538315; Fax: 0039 10 352169; e-mail:...UniversitaĂ di Milano, Via Botticelli 23, I-20133 Milano, Italy Editorial responsibility: J. Hoefs indicate that...convergence and in many instances recrystallized at eclogite-facies conditions (Droop et al. 1990). Geological...primary maÂŽc composition (Evans et al. 1979). In the Voltri Massif of the Ligurian Alps, eclogites and metarodingites |  | | Journal (article/letter/editorial) | | zone (e.g., Pognante, 1985; Guillot et al., 2004; Voltri, Monviso, Rocciavre: Federico et al., 2007), shows...from Saas-Fee area (Switzerland) to the Aosta valley (Italy; Fig. 1c), belongs to the internal Liguroâ ...LiguroâPiemontese oceanic lithosphere (Monviso, Voltri, ZS) together with some rare continent-derived... Serpentinite breccias from the southern Aosta valley (Mont Avic area) described by Tartarotti et al...During subduction and recrystallization under eclogite-facies conditions, initial hydration and subsequent |  | Liang, J.L., Ding, X., Sun, X.M., Zhang, Z.M., Zhang, H., Sun, W.D. (2009) Nb/Ta fractionation observed in eclogites from the Chinese Continental Scientific Drilling Project. Chemical Geology, 268 (1) 27-40 doi:10.1016/j.chemgeo.2009.07.006 | Journal (article/letter/editorial) | | R.L. Rudnick Keywords: Nb/Ta fractionation Eclogite Rutile Amphibole CCSD Subduction a b s t r a c t...detailed analyses of Nb and Ta concentrations of 19 eclogite samples and their principal mineral constituents...suprachondritic Nb/Ta values in minerals, e.g., rutile (4.8â87), titanite (12â62) and amphibole (2.0â67)... Amphiboles in amphibolites (retrograded from eclogite) can be classiďŹed into two groups: a low Nb/Ta...in the presence of rutile and titanite. The signiďŹcant Nb/Ta fractionation in rutile and other minerals |  | | Journal (article/letter/editorial) | | both d18O and dD. Grnets from coesite-bearing eclogite are as low as 211â° (VSMOW) and rutiles are 215â°...were all subjected to metamorphism in the coesite-eclogite facies. Oxygen isotope fractionation between quartz...discovery of low 18O values at the First International Eclogite Workshop, Stanford University, in 1994 (Yui et...their ephemeral existence as a worldâs record for eclogite, however. The isotopic geochemistry of Qinglongshan...NNE-SSW for several kilometers with outcrops of eclogite flanked by quartz-feldspar-amphibole gneiss to |  | Tan, Zhou, Agard, Philippe, Gao, Jun, John, Timm, Li, JiLei, Jiang, Tuo, Bayet, LĂŠa, Wang, XinShui, Zhang, Xi (2017) PâTâtime-isotopic evolution of coesite-bearing eclogites: Implications for exhumation processes in SW Tianshan. Lithos, 278. 1-25 doi:10.1016/j.lithos.2017.01.010 | Journal (article/letter/editorial) | | Tianshan SC RI Key words: UHP metamorphism; eclogite; P-T path; pseudosection modeling; thermobarometry;...coesite-bearing ED eclogite samples from a thick (~ 5 meters) layered metabasalt outcrop in order to PT...GPa, 540 Âą 20 â at 316.8 Âą 0.8 Ma, then, with eclogite-facies deformation ~ 2.0 Âą 0.15 GPa, 525 Âą 25...Samples come from a thick (~ PT 5m) layered eclogite outcrop close to where UHP was previously reported...al., 2005). A recent study indicated that some eclogite boundins also have a ACCEPTED MANUSCRIPT continental |  | | Journal (article/letter/editorial) | | indicate that distinct mantle sources existed for the eclogite protoliths 1.3 Ma ago, and that enrichment in...basic-ultrabasic complex; Champtoceaux Complex (Lower Loire valley); Horst des Essarts (in the VendBe)]. [I = 2 =...complex; (2) the Champtoceaux Complex (Lower Loire valley); (3) the Horst des Essarts (in the Vendbe). These...structural development. The sporadic occurrence of eclogite outcrops throughout these complexes is a notable...f 11 Ma; Paquette et al., 1984). Moreover, one eclogite (La Richaudais) has been recently dated, yielding |  | Tan, Zhou, Gao, Jun, Jiang, Tuo, Wang, Xinshui, Zhang, Xi (2019) PâTâtime (phengite Ar closure) history of spatially close-outcropping HP and UHP oceanic eclogites (southwestern Tianshan): implication for a potential deep juxtaposing process during exhumation?. International Geology Review, 61 (10) 1270-1293 doi:10.1080/00206814.2018.1507760 | Journal (article/letter/editorial) | | recent study on the ultra-high pressure (UHP) eclogite revealed a short timescale of exhumation (â¤10...samples from a HP eclogite lens and its host rock, the UHP thick-layered eclogite. Based on data from...geodynamics. According to modelling results, the HP lens eclogite reached peak metamorphism at ~550°C, 2.50 GPa...prograde metamorphism. In contrast, the UHP layered eclogite experienced UHP peak burial at ~510°C, 2.95 GPa...well-preserved mafic KEYWORDS (U)HP metamorphism; oceanic eclogite; thermodynamic modelling; muscovite ArâAr dating; |  | Franceschelli, M., Eltrudis, A., Memmi, I., Palmeri, R., Carcangiu, G. (1998) Multi-stage metamorphic re-equilibration in eclogitic rocks from the Hercynian basement of NE Sardinia (Italy) Mineralogy and Petrology, 62 (3) 167-193 doi:10.1007/bf01178028 | Journal (article/letter/editorial) | | rocks from the Hercynian basement of NE Sardinia (Italy) M. Franceschelli 1, A. Eltrudis I, I. M e m m i...Universit~ di Cagliari, Italy 2 Dipartimento di Scienze della Terra, Universit~ di Siena, Italy 3 Centro Studi...Geominerari e Mineralurgici C. N. R., Cagliari, Italy With 8 Figures Received January 21, 1997; revised...relics of eclogite facies re-equilibration. Four stages of evolution have been identified: an eclogite stage...amphibolite to greenschist stage. A possible pre(?)-eclogite stage is documented by inclusions of euhedral |  | | Journal (article/letter/editorial) | | metagabbros and Cpx-bearing granulites. All the eclogite samples studied are formed of well-preserved HP...these eclogites are petrologically similar to the eclogite samples from the better known BÄstvina Unit. Eclogites...preserve relict mineral assemblage from a pre-eclogite stage, enclosed in garnet with prograde zoning...kyanite eclogite from Ăhrov (Medaris et al. 2006), 800â850 °C and 1.7â1.9 GPa for SpaÄice eclogite, 1160â1180...1160â1180 °C a 1.7â1.9 GPa for the quartz-rich eclogite, and 960 °C a 1.9 GPa for other eclogites. Faryad |  | | Journal (article/letter/editorial) | | in Austria Petrologic Constraints for Eoalpine Eclogite Facies Metamorphism in the Austroalpine Otztal...retrograde reaction products. Retrogression of the eclogite parageneses reflecting decreasing pressure and...Minimum pressure and temperature conditions of the eclogite stage derived from Jd-content in omphacite and...southern CItztal basement after the eclogite stage. The age of the eclogite stage is interpreted as Eoalpine...exclusively yield Cretaceous mineral ages. Rb-Sr data on eclogite phengites (texturally clearly correlated with |  | | Journal (article/letter/editorial) | | S0016-7037(00)00801-8 Oxygen isotope equilibrium between eclogite minerals and its constraints on mineral Sm-Nd...systems of eclogite minerals. The omphaciteâ garnet pairs of oxygen isotope equilibrium at eclogite-facies...pairs. The presence or absence of fluid in the eclogite protoliths is a major rate-controlling factor...equilibrium conditions. 2. GEOLOGICAL SETTINGS The eclogite samples used in this study were collected from...gneisses, and schist, metagranite associated with the eclogite blocks (Wang et al., 1995). These observations |  | Miller, C., ThĂśni, M., Konzett, J., Kurz, W., Schuster, R. (2005) Eclogites from the Koralpe and Saualpe type-localities, Eastern Alps, Austria. Mitteilungen der Ăsterreichischen Mineralogischen Gesellschaft, 150. | Journal (article/letter/editorial) | | Mountains. These two ridges are separated by the Lavant valley. The terrain morphology is characterized by valleys...590 °C at 250-270 Ma; HABLER & THĂNI, 2001), and eclogite facies (2.4 GPa and 650-730°C at approximately...pegmatite gneisses. Meter to kilometre-sized lenses of eclogite, eclogiteamphibolite and (meta)gabbros occur within...is also linked to the rapid exhumation of the eclogite bearing unit (KURZ & FRITZ, 2003). Subsequent...omphacite, quartz, kyanite, zoisite/clinozoisite, rutile, apatite, zircon, phengite, calcic-subcalcic amphiboles |  | | Journal (article/letter/editorial) | | Petrology and Mineralogy of Eclogite and Garnet Amphibolite from Puerto Cabello, Venezuela by BENJAMIN...of garnet-clinopyroxene (eclogite), garnet-clinopyroxeneamphibole (eclogite-amphibolite) and garnet-amphibole...the epidote-amphibolite facies. Occurrences of eclogite rocks usually are found to be xenoliths in kimberlite...blocks in migmatites and schists. The presence of eclogite metamorphosed in situ with rocks of obvious sedimentary...September 5, 2015 ABSTRACT Occurrences of eclogite, eclogite-amphibolite, and garnet amphibolite from |  | Songnian, Lu, Huaikun, Li, Haifeng, Yu, Fengqing, Zhao, Chunliang, Yang (1999) Neoproterozoic Orogeny in Northwestern China. Gondwana Research, 2 (4) 610-611 doi:10.1016/s1342-937x(05)70217-3 | Journal (article/letter/editorial) | | Devonian unconformity were discovered. Recently an eclogite-granitoid gneiss belt, which is situated along...monzonite-granite and Krich granite. A typical coesite-eclogite outcrop has been discovered recently on the Yuqiahe...The eclogite occurs lenticularly in the granitoid gneiss of the Dakendaban Complex. The eclogite consists...quartz/ coesite, muscovite/phengite, hornblende and rutile. The garnet is composed of 51-59% almandine, 26-31%...abnormal high B, value of 9.075A, occurs in the eclogite. The hornblende is the ultra-high pressure type |  | | Journal (article/letter/editorial) | | 21 April 2004 Springer-Verlag 2004 Abstract Eclogite occurs within the southern domain of the East...the 3,000-km-long Snowbird tectonic zone. The eclogite occurs in association with a variety of lower...history from 2.6 to 1.9 Ga. Temperatures of the eclogite facies metamorphism are constrained by garnet-clinopyroxene...pargasite-plagioclase. U-Pb IDTIMS zircon geochronology of the eclogite yields a weighted mean 207Pb/206Pb date of 1,904...0Âą0.3 Ma, which we interpret as the time of peak eclogite facies metamorphism. SHRIMP in situ analyses of |  | Yasumoto, Atsushi, Yoshida, Kenta, Kuwatani, Tatsu, Nakamura, Daisuke, Svojtka, Martin, Hirajima, Takao (2018) A rapid and precise quantitative electron probe chemical mapping technique and its application to an ultrahigh-pressure eclogite from the Moldanubian Zone of the Bohemian Massif (NovĂŠ Dvory, Czech Republic) American Mineralogist, 103 (10) 1690-1698 doi:10.2138/am-2018-6323ccby | Journal (article/letter/editorial) | | technique and its application to an ultrahigh-pressure eclogite from the Moldanubian Zone of the Bohemian Massif...bulk compositions within an ultrahigh-pressure eclogite from NovĂŠ Dvory, Czech Republic. The studied sample...sample is a garnet-rich bimineralic eclogite that includes a 3 mm thick pyroxene-rich layer. A mapped...intruded the eclogite. Keywords: Bohemian Massif, compositional map, electron probe, eclogite, pyroxenite...applied the proposed method to an ultrahigh-pressure eclogite collected from the Moldanubian Zone of the Bohemian |  | Rehman, Hafiz Ur, Tanaka, Ryoji, O'Brien, Patrick J., Kobayashi, Katsura, Tsujimori, Tatsuki, Nakamura, Eizo, Yamamoto, Hiroshi, Khan, Tahseenullah, Kaneko, Yoshiyuki (2014) Oxygen isotopes in Indian Plate eclogites (Kaghan Valley, Pakistan): Negative δ18O values from a high latitude protolith reset by Himalayan metamorphism. Lithos, 208. 471-483 doi:10.1016/j.lithos.2014.09.007 | Journal (article/letter/editorial) | | Oxygen isotopes in Indian Plate eclogites (Kaghan Valley, Pakistan): Negative δ18O values from a high latitude...time for the Himalayan metabasites of the Kaghan Valley, Pakistan in this study. The highest metamorphic...metamorphic grades are recorded in the north of the valley, near the Indiaâ Asia collision boundary, in the form...VSMOW. On a more local scale, within a single eclogite body, the δ18O values were the lowest (â 2.25...δ18O values, among different eclogite bodies in general and at single outcrop-scales in particular, reďŹects |  | Wu, Y.-B., Gao, S., Zhang, H.-F., Yang, S.-H., Liu, X.-C., Jiao, W.-F., Liu, Y.-S., Yuan, H.-L., Gong, H.-J., He, M.-C. (2009) U-Pb age, trace-element, and Hf-isotope compositions of zircon in a quartz vein from eclogite in the western Dabie Mountains: Constraints on fluid flow during early exhumation of ultrahigh-pressure rocks. American Mineralogist, 94 (2) 303-312 doi:10.2138/am.2009.3042 | Journal (article/letter/editorial) | | Hf-isotope compositions of zircon in a quartz vein from eclogite in the western Dabie Mountains: Constraints on...zircon grains from a quartz vein within an UHP eclogite outcrop from the Hongâan area, western Dabie Mountains...omphacite, rutile, quartz, and H2O, implying that they crystallized from aqueous fluid under HP eclogite-facies...have Hf compositions similar to those in the host eclogite, which demonstrates isotopic equilibrium between...sign of fluid flow, and are commonly found in eclogite-facies rocks (Liati and Gebauer 1999; Rubatto |  | | Journal (article/letter/editorial) | | TEXTURES IN ZIRCON GENERATED BY OCEAN-FLOOR AND ECLOGITE-FACIES METAMORPHISM: A CATHODOLUMINESCENCE AND...ocean-floor and the Eoalpine metamorphism, in eclogite-facies conditions, respectively. We contend that...star indicates the location of the Lugros eclogite outcrop from which the zircon crystals dated by SHRIMP...Alpine metamorphism in the MC developed under eclogite-facies conditions during the first Alpine metamorphic...rise to the Eo-alpine metamorphic event, in the eclogite-facies conditions (Puga et al. 2002a). A part |  | Butler, J.P., Jamieson, R.A., Dunning, G.R., Pecha, M.E., Robinson, P., Steenkamp, H.M. (2018) Timing of metamorphism and exhumation in the Nordøyane ultra-high-pressure domain, Western Gneiss Region, Norway: New constraints from complementary CA-ID-TIMS and LA-MC-ICP-MS geochronology. Lithos, 310. 153-170 doi:10.1016/j.lithos.2018.04.006 | Journal (article/letter/editorial) | | UâPb geochronology study of zircon and associated rutile and titanite from the Nordøyane ultra-high-pressure...(WGR) of Norway. The dated samples include T 4 eclogite bodies, 2 host-rock migmatites, and 2 cross-cutting...from the island of Harøya. Zircon from a coesite eclogite yielded an age of ca. 413 Ma, CR interpreted...in this sample. Zircon data from the other US eclogite bodies yielded metamorphic ages of ca. 413 Ma...with 413 Ma and 407 Ma ages are consistent with eclogite-facies AN crystallization. In all of the eclogites |  | | Journal (article/letter/editorial) | | epidote, hornblendic amphibole, quartz/coesite and rutile with or without kyanite and talc. Garnet is mostly...porphyroblasts and kyanite-bearing quartz veins in eclogite. As lawsonite dehydration can facilitate evolution...rights reserved. Accepted Article Keywords: UHP eclogite; phase equilibria; PâT path; Dabie orogen. INTRODUCTION...diamond-bearing eclogites from the south Dabie eclogite belt (Okay et al., 1989; Wang et al., 1989; Xu...739â866°C. Garnet peridotites in the south Dabie eclogite belt were also estimated to yield higher pressures |  | | Journal (article/letter/editorial) | | metabasites: a case study using the Tso Morari UHP eclogite Ruiguang Pan1 ¡ Catherine A. Macris1 ¡ Carrie...pressureâtemperature (PâT) paths of metabasites. In this paper, eclogite from the Tso Morari UHP terrane, NW India, is...Metabasites ¡ Thermodynamic modeling ¡ Tso Morari ¡ UHP eclogite ¡ PâT paths ¡ Garnet fractionation Communicated...consideration of chemical heterogeneity (e.g., outcrop scale, mineral zoning, and relics) and definition...collected from the wellcharacterized coesite-bearing eclogite of the Tso Morari UHP terrane, in NW Himalaya |  | | Journal (article/letter/editorial) | | orthogneiss samples preserve garnets with XCa up to 0.50, rutile inclusions within titanite or epidote and relict...garnetâbiotite FerMg exchange thermometry and calculated 5 rutile q 3 grossularq 2SiO 2 q H 2 O s 5 titaniteq 2 zoisite...for the interpretation of controversial gneissâeclogite relationships in other UHP metamorphic terrains...have tentatively defined as the Central Dabie UHP Eclogite-Bearing Terrane Ĺ˝see Fig. 1, and Carswell et al... which shows the regional extent of a coesiteâeclogite facies unit within the dominant orthogneiss lithologies |  | | Journal (article/letter/editorial) | | Multistage growth of garnet in ultrahigh-pressure eclogite during continental collision in the Dabie orogen:...2011 Available online 24 August 2011 Keywords: Eclogite Garnet Growth time Mineral inclusions UâPb ages...matrix) were determined on thin sections of UHP eclogite from the western part of the Dabie orogen. The...abundant inclusions of amphibole + epidote/allanite+ rutile + plagioclase + quartz Âą zircon, whereas Group...occasionally contains inclusions of omphacite Âą rutileÂą apatite Âą zircon. LA-ICPMS UâPb dating and trace |
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