 | | 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) | | 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) | | Studi di Milano, via Botticelli, 23, 20133 Milan, Italy e-mail: mauro.gemmi@unimi.it M. Merlini ESRF, 6...Section of Milan, Via Botticelli 23, 20133 Milan, Italy N. Curetti Dipartimento Scienze Mineralogiche e...di Torino, Via Valperga Caluso 35, 10025 Torino, Italy sheet and by reducing the bond length differences...of Experimental Petrology, University of Milan, Italy. Table 1 List of the investigated mica samples...37Al0.63)O10(OH)2 Gneiss outcrop of Ahornach (Bolzano, Alto Adige, Italy) FEMa 2M1 (K0.96)(Al1.49Mg0 |  | | 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 |  | | 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, 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) | | 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 |  | | 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 |  | 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 |  | 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) | | Editor: R.L. Rudnick Keywords: Nb/Ta fractionation Eclogite Rutile Amphibole CCSD Subduction a b s t r a...detailed analyses of Nb and Ta concentrations of 19 eclogite samples and their principal mineral constituents... Amphiboles in amphibolites (retrograded from eclogite) can be classiďŹed into two groups: a low Nb/Ta...was not reported. In this paper, we studied 19 eclogite samples from 100 to 3000 m depths in the main...sedimentary cover. More than one hundred outcrops of eclogite were found in Donghai, and occurred as pods or |  | | 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 |  | 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; |  | 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 |  | | 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 |  | 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...abnormal high B, value of 9.075A, occurs in the eclogite. The hornblende is the ultra-high pressure type...important aspect is the finding of coesite in the eclogite. The eclogitc retains its original characteristics |  | | 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 |  | 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...localities in the Koralpe the transition from gabbro to eclogite can be studied in situ. The gabbros are generally |  | 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 |  | | 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 |  | QIU, H.-N., WIJBRANS, J. R., BROUWER, F. M., YUN, J.-B., ZHAO, L.-H., XU, Y.-G. (2010) Amphibolite facies retrograde metamorphism of the Zhujiachong eclogite, SE Dabieshan: 40Ar/39Ar age constraints from argon extraction using UV-laser microprobe, in vacuo crushing and stepwise heating. Journal of Metamorphic Geology, 28 (5) 477-487 doi:10.1111/j.1525-1314.2010.00875.x | Journal (article/letter/editorial) | | facies retrograde metamorphism of the Zhujiachong eclogite, SE Dabieshan: 40Ar â 39Ar age constraints from...Amsterdam, The Netherlands ABSTRACT The Zhujiachong eclogite in the south-eastern Dabieshan ultra-high-P terrane...garnet-amphibolite mineral assemblages in most rocks in the outcrop. This study is focused on providing age constraints...symplectite matrix that formed during retrogression from eclogite pyroxene. Late stage hydrothermal activity leading...observed from thin-sections of the retrograded eclogite: phengite ďŹ paragonite and amphibole in matrix |  | 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...they crystallized from aqueous fluid under HP eclogite-facies conditions. The zircon grains show low...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 |  | Schmidt, Alexander, Weyer, Stefan, Mezger, Klaus, Scherer, Erik E., Xiao, Yilin, Hoefs, Jochen, Brey, Gerhard P. (2008) Rapid eclogitisation of the DabieâSulu UHP terrane: Constraints from LuâHf garnet geochronology. Earth and Planetary Science Letters, 273 (1) 203-213 doi:10.1016/j.epsl.2008.06.036 | Journal (article/letter/editorial) | | Keywords: LuâHf geochronology SmâNd geochronology eclogite ultrahigh-pressure eclogitisation A B S T R A...metamorphism) and the wide variety of garnet and eclogite chemical compositions represented. Two samples...Zheng et al., 2005): (1) a peak ultrahigh-pressure eclogite facies imprint in the coesite/diamond stability...8 GPa; (2) an episode of high-pressure quartz-eclogite 204 A. Schmidt et al. / Earth and Planetary...and Sulu terranes. On the basis of SmâNd ages of eclogite minerals, the time interval between 240 and 200 |  | | 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) | | 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...the Bixiling area, which are interlayered with eclogite, were interpreted to originate from accumulation |
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