 | | Journal (article/letter/editorial) | | Wilhelms-Universität, Corrensstrasse 24, D-48149 Münster, Germany (m.a.smit@uni-muenster.de) ABSTRACT Eclogites...between phases of the eclogite facies assemblage: garnet + omphacite + zoisite + clinozoisite + quartz...Pressure and temperature conditions for the main eclogite stage are estimated to be 2.3–2.8 GPa and 585–655...result, recognition of magnesite and aragonite in eclogite facies rocks has been used as an indicator for... The formation of aragonite is constrained to eclogite facies conditions, which implies that the studied |  | | 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 |  | | Report (chapter) | | Glaucophane and barroisite eclogites from the Upper Kaghan nappe: implications for the metamorphic history...glaucophane- and barroisite-bearing eclogites from the Upper Kaghan nappe in the Higher Himalayan Crystallines...eclogites previously described elsewhere in the Upper Kaghan nappe. The metamorphic peak assemblage is...garnet omphacite-rutile-quartz in glaucophane eclogite and garnet-omphacite-zoisiterutile _+kyanite _+phengite..._+phengite _+ankerite in barroisite eclogite. Most samples contain a significant amount of amphibole |  | Masago, H., Rumble, D., Ernst, W. G., Parkinson, C. D., Maruyama, S. (2003) Low delta18O eclogites from the Kokchetav massif, northern Kazakhstan. Journal of Metamorphic Geology, 21 (6) 579-587 doi:10.1046/j.1525-1314.2003.00465.x | Journal (article/letter/editorial) | | isotopic compositions are heterogeneous in samples of eclogite, even on an outcrop scale. Schists have rather...during subduction and UHP metamorphism. Key words: eclogite; Kokchetav massif; low d18O; whiteschist. INTRODUCTION...and geochemical recycling between crust and deep upper mantle, and tectonic processes responsible for growth...investigation of devolatilization processes in the upper mantle. One fertile, but so far neglected avenue...and III), quartz-eclogite (Unit III) and coesiteeclogite facies to diamond-eclogite facies (Unit II) |  | | Journal (article/letter/editorial) | | Geol., 50: 201--222. A rare textural variety of eclogite characterized by a two-fold occurrence of omphacite...successive stages of metamorphic evolution: (1) Pre-eclogite stage, when the primary rocks developed the mineral...(greenschist facies). (2) Eclogite stage, when the rock gained typical eclogite mineral compositions as...unaccompanied by an increase in PH20 (eclogite facies). (3) Post-eclogite stage, when the garnet--omphacite...with microlitic omphacite form the groundmass. Zoisite and phengite may be present in small quantities |  | | Journal (article/letter/editorial) | | garnets in ultrahigh-pressure (UHP) metamorphic eclogite from Dabie, east-central China. Compositional...slab exhumation. Keywords: Atoll garnet, fluid, eclogite, Dabie INTRODUCTION Chemical zoning of metamorphic...in both normal and atoll-shaped garnets in an eclogite from the Dabie ultrahigh-pressure (UHP) metamorphic... 1120 CHENG ET AL.: ORIGIN OF ATOLL GARNETS IN ECLOGITE pressure metamorphic belt in the world, and is...atoll-shaped garnets have been found in several eclogite outcrops from Huangzhen throughout the Dabie (Castelli |  | | Journal (article/letter/editorial) | | rich in hydrous phases, formed along margins of eclogite lenses and along mesoscopic fracture systems....are from 1–50 cm thick, with adjacent wall-rock eclogite replaced by symplectites. At a low degree of reaction...Tibetan plateau is caused by transformation of eclogite to granulite in the crustal root zone. Such models...models assume that complete transformation to eclogite and back-reaction to granulite and amphibolite...Metamorphic Geology, Volume 17, Number 6, 1999 eclogite would not occur on a geological time scale unless |  | Carswell, D. A., Brueckner, H. K., Cuthbert, S. J., Mehta, K., O'Brien, P. J. (2003) The timing of stabilisation and the exhumation rate for ultra-high pressure rocks in the Western Gneiss Region of Norway. Journal of Metamorphic Geology, 21 (6) 601-612 doi:10.1046/j.1525-1314.2003.00467.x | Journal (article/letter/editorial) | | Universität Potsdam, Postfach 601553, D-14415 Potsdam, Germany ABSTRACT New petrographic evidence and a review...firstly amphibolite facies then quartz-stable, eclogite facies conditions. Currently, the best constrained...retain coesite inclusions) from the Hareidland eclogite. Exhumation must have followed shortly thereafter...Cover units (para-autochthon, lower, middle and upper allochtrons) Basement gneisses, mangerite and anorthosite...Hornelen Ultramafic bodies: GU - garnetiferous Eclogite with prograde zoned garnets and no evidence for |  | Carswell, D. A, Krabbendam, M., Cuthbert, S. J., Eide, E. A, Brueckner, H. K., Medaris Jr, L. G (2003) Guidebook to the Field Excursions in the Nordfjord-Stadlandet-Almklovdalen Area. Norges Geologiske Undersøkelse. Rapport 2003.056. Norges Geologiske Undersøkelse (NGU) | Report (issue) | | conducted during the Alice Wain Memorial West Norway Eclogite Field Symposium held in Selje from June 21st-28th...high- and ultrahigh-pressure rocks. Keywords: Eclogite Gabbro Ultrahigh-pressure Peridotite Western...Microdiamond ALICE WAIN MEMORIAL WEST NORWAY ECLOGITE FIELD SYMPOSIUM JUNE 21st – 28th, 2003 in SELJE...spectroscopy, of an occurrence of coesite within an eclogite in the WGR. This coesite is preserved (armoured...Figure 1-1) within a small, partly retrograded, eclogite pod at Grytting, near Selje, in the SW part of |  | ŠTÍPSKÁ, P., CHOPIN, F., SKRZYPEK, E., SCHULMANN, K., PITRA, P., LEXA, O., MARTELAT, J. E., BOLLINGER, C., ŽÁČKOVÁ, E. (2012) The juxtaposition of eclogite and mid-crustal rocks in the Orlica-Śnieżnik Dome, Bohemian Massif. Journal of Metamorphic Geology, 30 (2) 213-234 doi:10.1111/j.1525-1314.2011.00964.x | Journal (article/letter/editorial) | | 1111/j.1525-1314.2011.00964.x The juxtaposition of eclogite and mid-crustal rocks in the _ Orlica–Śnieznik...F-59655 Villeneuve d ÕAscq, France ABSTRACT Eclogite, felsic orthogneiss and garnet–staurolite metapelite...cleavage, S3, occur locally. The S1 fabric in the eclogite is defined by alternation of garnet-rich (grs =...(Si = 3.26–3.31 p.f.u.) and accessory kyanite, zoisite, rutile and quartz, indicating conditions of 19–...folding are associated with retrogression of the eclogite under amphibolite facies conditions, and with |  | | Journal (article/letter/editorial) | | Schulte · P. Blümel Metamorphic evolution of eclogite and associated garnet-mica schist in the high-pressure...metabasic garnet–omphacite schists and enclose eclogite boudins in the high-pressure metamorphic Maksyutov...for the eclogite boudin, an intermediate temperature (630°C, >1.7 GPa) for the foliated eclogite and the...Darmstadt, Schnittspahnstrasse 9, D-64287 Darmstadt, Germany Fax: +06151 166539 e-mail: schulte@hrz1.hrz.th-darmstadt...the South Urals (49°N–56°N). The greenschist- to eclogite facies metamorphic Maksyutov Complex trends 180 |  | | Journal (article/letter/editorial) | | exceeding the crustal levels. CE Blueschist- and eclogite-bearing HP-UHP complexes formed at low thermal...combined with the abundance of Late Neoproterozoic eclogite-bearing complexes all over the ACCEPTED MANUSCRIPT...(N-MORB or E-MORB) affinity for most of the studied eclogite- IP and blueschist-bearing associations may...northeastern Transbaikalia (Russia), which are the oldest eclogite-facies rocks in the CAOB (Avchenko et. al., 1989;...unit) (Bulgatov, 1983) and the Dzhaltuk series (upper unit) (Mitrofanov, 1978), intruded CE by anatectic |  | Skublov, S. G., Balashov, Yu. A., Marin, Yu. B., Berezin, A. V., Mel’nik, A. E., Paderin, I. P. (2010) U-Pb age and geochemistry of zircons from Salma eclogites (Kuru-Vaara deposit, Belomorian Belt) Doklady Earth Sciences, 432 (2) 791-798 doi:10.1134/s1028334x10060188 | Journal (article/letter/editorial) | | 10.1134/S1028334X10060188 The possibility of eclogite formation in the Archean is currently considered...Archean eclogites (U–Pb age of zircons from the eclogite is 2721 ± 6 Ma) were originally discovered in...the Kola Peninsula. Later, numerous bodies of eclogitelike bodies as tectonic blocks of dif ferent...of eclogite metamorphism with ages of 2.82 and 2.72 Ma were distinguished for the Salma eclogite mainly...isotopes and zircon geochemistry from the same eclogite outcrops allowed the authors of [7] to reach a conclusion |  | | Journal (article/letter/editorial) | | experiment”, Ruhr-University, D-44780 Bochum, Germany Accepted 9 April 1997 Abstract The metamorphic...uplift from depths of more than 100 km into the upper crust. If such data were correct, the P-T path and...The rocks of the Zermatt-Saas zone reflect an eclogite-facies imprint of Late Cretaceous (loo-80 Ma;...Several authors have estimated the conditions of eclogite-facies metamorphism in the Zermatt-Saas zone (see...calibrated geothermobarometers in the past. The eclogite-facies mineral assemblages were partly re-equilibrated |  | | Journal (article/letter/editorial) | | not changed significantly during the gabbro to eclogite transformation because trace elements are redistributed...incompatible trace elements are predominantly hosted in zoisite/clinozoisite (Sr, Pb, U, Th, LREE), apatite (Sr...Sc), rutile (Ti, Nb, Ta) and zircon (Zr, Hf ) at eclogite-facies conditions. Omphacite hosts most of the... All rights reserved. Keywords: Eastern Alps; Eclogite; Trace elements; Subduction; Rutile thermometry...compositions of gabbros and eclogites from the eclogite type locality in the Eastern Alps (Haüy, 1822) |  | Zheng, Yong-Fei, Fu, Bin, Xiao, Yilin, Li, Yiliang, Gong, Bing (1999) Hydrogen and oxygen isotope evidence for fluid–rock interactions in the stages of pre- and post-UHP metamorphism in the Dabie Mountains. Lithos, 46 (4) 677-693 doi:10.1016/s0024-4937(98)00090-5 | Journal (article/letter/editorial) | | fractionations between omphacite and garnet in some eclogite samples. The d18 O values of y4 to y1‰ for some...metamorphism. Heterogeneous d18 O values for the eclogite protoliths implies not only the varying degrees...Keywords: Stable isotope; Fluid–rock interaction; Eclogite; Metamorphism; Plate subduction; The Dabie Mountains...(1999) 677–693 Previous studies determined that eclogite and associated quartz–schist from Donghai in the...exchange has been presumed to occur between the eclogite protoliths and a fluid of meteoric origin before |  | | Journal (article/letter/editorial) | | Elsevier B.V. All rights reserved. Keywords: Kyanite eclogite; Geochemistry; P – T conditions; Pohorje; Slovenia...and Thöni, 1995; Magetti et al., 1987) to the eclogite type locality Kor- and Saualpe in the East (Haüy...or even late Proterozoic (Manby et al., 1988) eclogite-facies event. The eclogites from the Pohorje Mountains...the southern extension of the Koralpe – Saualpe eclogite zone. The Pohorje eclogites were first described...78 (2004) 235–261 Alpine, possibly Caledonian, eclogite-facies metamorphism (Hinterlechner-Ravnik et al |  | Miller, Christine, Mundil, Roland, Thöni, Martin, Konzett, Jürgen (2005) Refining the timing of eclogite metamorphism: a geochemical, petrological, Sm-Nd and U-Pb case study from the Pohorje Mountains, Slovenia (Eastern Alps) Contributions to Mineralogy and Petrology, 150 (1) 70-84 doi:10.1007/s00410-005-0004-0 | Journal (article/letter/editorial) | | Thöni Jürgen Konzett Refining the timing of eclogite metamorphism: a geochemical, petrological, Sm-Nd...within the stability field of quartz. Metapelitic eclogite country rocks contain the assemblage garnet +...are in good agreement with results obtained from eclogite samples. The eclogites contain a single population...of 90.7±3.9 and 90.1±2.0 Ma (Nd: +8) for two eclogite samples. The agreement between U-Pb and Sm-Nd...Austroalpine basement including the Koralpe and Saualpe eclogite type locality in the course of the complex collision |  | Li, Xiaoli, Zhang, Lifei, Wei, Chunjing, Slabunov, Alexander I. (2015) Metamorphic PT path and zircon U–Pb dating of Archean eclogite association in Gridino complex, Belomorian province, Russia. Precambrian Research, 268. 74-96 doi:10.1016/j.precamres.2015.07.009 | Journal (article/letter/editorial) | | Metamorphic PT path and zircon U-Pb dating of Archaean eclogite association in Gridino complex, Belomorian province...Metamorphic PT path and zircon U-Pb dating of Archaean eclogite association in Gridino complex, Belomorian province...Belomorian eclogite; 3 We confirm the clock-wise metamorphic PT path of Belomorian eclogite assemblages;...assemblages; 4 Neoarchean age of Belomorian eclogite has been determined; 5 Subsequent high-temperature...reworking during the exhumation of Belomorian eclogite 6 assemblages has been suggested at Neoarchean; |  | Guo, Shun, Chen, Yi, Ye, Kai, Su, Bin, Yang, Yueheng, Zhang, Lingmin, Liu, Jingbo, Mao, Qian (2015) Formation of multiple high-pressure veins in ultrahigh-pressure eclogite (Hualiangting, Dabie terrane, China): Fluid source, element transfer, and closed-system metamorphic veining. Chemical Geology, 417. 238-260 doi:10.1016/j.chemgeo.2015.10.006 | Journal (article/letter/editorial) | | multiple high-pressure veins in ultrahigh-pressure eclogite (Hualiangting, Dabie terrane, China): Fluid source...multiple high-pressure veins in ultrahigh-pressure eclogite (Hualiangting, Dabie terrane, China): Fluid source...multiple high-pressure veins in ultrahigh-pressure eclogite (Hualiangting, Dabie terrane, China): fluid source...kyanite-epidote-quartz (Ky-Ep-Qz) veins from the vein-eclogite boundary to the vein MA interior. Towards the...coesite-enclosing epidote, kyanite, and quartz in the eclogite systematically decrease, indicating an intensive |  | | Journal (article/letter/editorial) | | volcanic rocks and pelagic sediments representing the upper levels of the downgoing oceanic crust or voluminous...Alpide � � Gondwana-Land Alpide suture (teeth on upper plate) Active subduction o '-' 1000 km Figure...d laurosio(l/Europeon units Alpide blueschist-eclogite facies rocks Apulian units Alpide me tamorphosed...Rcgions shown in black indicate blueschist/eclogite outcrops irrespective of the degree of the later, lower...platform. In the Eastern Alps the Penninic zone outcrops in three large tectonic windows-Tauern, Engadine |  | Liu, Yung-Hsin, Yang, Huai-Jen, Takazawa, Eiichi, Satish-Kumar, Madhusoodhan, You, Chen-Feng (2015) Decoupling of the Lu–Hf, Sm–Nd, and Rb–Sr isotope systems in eclogites and a garnetite from the Sulu ultra-high pressure metamorphic terrane: Causes and implications. Lithos, 234. 1-14 doi:10.1016/j.lithos.2015.07.013 | Journal (article/letter/editorial) | | Keywords: Hf isotope Nd isotope UHP metamorphism Sulu Eclogite Protolith a b s t r a c t The whole-rock Hf,...extension of the Qinling–Dabie orogenic belt (Fig. 1, upper insert) formed by the convergence between the North...observation of structural coherence through many eclogite-host rock contacts and the discovery of tiny coesite...2007b) showing the major lithologic units and eclogite outcrops near the Donghai County in the Sulu metamorphic...terrane at eastern China (the rectangular area in the upper insert). The two stars indicate sampling localities |  | | Journal (article/letter/editorial) | | of a metasomatised lithosphere. The multi-stage eclogite-facies metamorphism is dated at 425-395 Ma (i...is implied by the Archaean and Lower Proterozoic upper intercepts on Concordia--devoid of geological significance--which...the AECM. The U-Pb zircon results have yielded upper and lower intercepts which represent, in different...ancient inherited component, the age of magmatism, eclogite-facies metamorphism or even the effects of late-stage...to determine the age of protolith magmatism and eclogite-facies metamorphism; equally, we attempt to define |  | | Report (chapter) | | large faults merely passive passengers back to upper crustal conditions, or do they contain significant...deformation fabrics developed under blueschist and eclogite facies. Rosenbaum et al. (2002) similarly argued...et al. (2001) considered these units to form an upper tectonic sheet, carried onto high-pressure rocks...conditions are generally estimated to lie in the upper pressure limits of the epidote-blueschist stability...Traditionally the best-preserved blueschist and eclogite outcrops are considered to lie in the northern part |  | Kirchenbaur, M., Pleuger, J., Jahn-Awe, S., Nagel, T. J., Froitzheim, N., Fonseca, R. O. C., Münker, C. (2012) Timing of high-pressure metamorphic events in the Bulgarian Rhodopes from Lu–Hf garnet geochronology. Contributions to Mineralogy and Petrology, 163 (5) 897-921 doi:10.1007/s00410-011-0705-5 | Journal (article/letter/editorial) | | Sm–Nd chronometers to a suite of representative eclogite samples covering two different key units of the...the Rhodopean nappe stack: (1) the Kimi Complex (Upper Allochthon) and (2) the Middle Allochthon. In addition...concentrations in order to constrain the nature of the eclogite protoliths. Two HP metamorphic events were revealed...geochronology: (1) a Lower Cretaceous event in the Upper Allochthon (126.0 ± 1.7 Ma) and (2) an Eocene event...Universität Bonn, Poppelsdorfer Schloss, 53115 Bonn, Germany e-mail: Kirchenbaur@uni-bonn.de M. Kirchenbaur |
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