 | | Journal (article/letter/editorial) | | indicate that distinct mantle sources existed for the eclogite protoliths 1.3 Ma ago, and that enrichment in...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...yielding an age of ,413 f 16 Ma for the eclogite-facies metamorphism and an age of 2208 ?r 39 Ma for its...(Paquette et al., 1985). In the present study, one eclogite and three metagabbros were sampled from two different |  | 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) | | high-pressure fluids during retrograde metamorphism of eclogite-facies rocks ( Voltri Massif, Italian Western...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...reaction kinetics (Rubie, 1990). Fluid inclusions in eclogite-facies rocks therefore represent an important...subduction-zone metamorphism. During exhumation of eclogite-facies rocks the high-pressure fluid inclusions |  | Tan, Zhou, Agard, Philippe, Gao, Jun, John, Timm, Li, JiLei, Jiang, Tuo, Bayet, Léa, Wang, XinShui, Zhang, Xi (2017) P–T–time-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;...Malteserstr. AC c. 74–100, D-12449, Berlin, Germany f. Laboratory of Isotope Geochemistry, Wuhan Centre...coesite-bearing ED eclogite samples from a thick (~ 5 meters) layered metabasalt outcrop in order to PT...GPa, 540 ± 20 ℃ at 316.8 ± 0.8 Ma, then, with eclogite-facies deformation ~ 2.0 ± 0.15 GPa, 525 ± 25...Samples come from a thick (~ PT 5m) layered eclogite outcrop close to where UHP was previously reported |  | | 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 |  | | Journal (article/letter/editorial) | | metamorphic belt, East China. Eclogite, gneiss, amphibolite (retrograded from eclogite), ultramafic rocks, and...rocks in the depth range of 0–3,000 m (mainly eclogite and gneiss) show that the investigated rocks can...Göttingen, Goldschmittstrasse 1, 37077 Gottingen, Germany E-mail: yxiao@gwdg.de Tel.: +49-551-395253 Fax:...an UHP terrain. Studies of layered rocks at the outcrop scale have demonstrated the important control of...peridotite and pyroxenite, and minor marble; abundant eclogite bodies occur as lenses, discontinuous layers, |  | 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) | | and Environmental Sciences, Potsdam University, Germany d Department of Earth and Environmental Sciences...VSMOW. On a more local scale, within a single eclogite body, the δ18O values were the lowest (− 2.25...δ18O values, among different eclogite bodies in general and at single outcrop-scales in particular, reflects...main mantle thrust comprise the amphibolite to eclogite facies series, which belong to the Higher Himalayan...subducted beneath Asia (Guillot et al., 2003). Eclogite facies metamorphism in the Kaghan Valley occurred |  | | 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) | | 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 Běstvina Unit. Eclogites...preserve relict mineral assemblage from a pre-eclogite stage, enclosed in garnet with prograde zoning...kyanite eclogite from Úhrov (Medaris et al. 2006), 800–850 °C and 1.7–1.9 GPa for Spačice eclogite, 1160–1180...1160–1180 °C a 1.7–1.9 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) P–T–time (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 (≤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 Ar–Ar dating; |  | Zhang, Yong, Pan, Tong, Zhang, Aikui, He, Shuyue, Qian, Ye, Bai, Yongshan (2023) Spatial Relationship between Eclogite and Copper-Nickel Mineralization in East Kunlun, China. Minerals, 13 (3) 330 doi:10.3390/min13030330 | Journal (article/letter/editorial) | | minerals Article Spatial Relationship between Eclogite and Copper-Nickel Mineralization in East Kunlun...Qian, Y.; Bai, Y. Spatial Relationship between Eclogite and Copper-Nickel Mineralization in East Kunlun...between the Cu-Ni deposits and eclogite distribution. In this study, eclogite samples from the Xiarihamu...electron probe microanalysis (EPMA). Further, eclogite protolith properties, the formation environment...mechanism were also investigated. Geochemically, eclogite is rich in MgO and FeO and low in alkali and SiO2 |  | Schmidt, Alexander, Weyer, Stefan, Mezger, Klaus, Scherer, Erik E., Xiao, Yilin, Hoefs, Jochen, Brey, Gerhard P. (2008) Rapid eclogitisation of the Dabie–Sulu UHP terrane: Constraints from Lu–Hf garnet geochronology. Earth and Planetary Science Letters, 273 (1) 203-213 doi:10.1016/j.epsl.2008.06.036 | Journal (article/letter/editorial) | | Frankfurt, Altenhöferallee 1, 60438 Frankfurt, Germany Zentrallabor für Geochronologie, Institut für Mineralogie...Universität Münster, Corrensstr. 24, 48149 Münster, Germany CAS Key Laboratory of Crust–Mantle Materials and...Göttingen, Goldschmidtstr. 26 1-3, 37077 Göttingen, Germany b c A R T I C L E I N F O Article history: Received...Keywords: Lu–Hf geochronology Sm–Nd 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 |  | 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 Hong’an 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 |  | 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 ⁄ 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 fi paragonite and amphibole in matrix |  | | 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...0±0.3 Ma, which we interpret as the time of peak eclogite facies metamorphism. SHRIMP in situ analyses of |  | | 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 omphacite– 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 |  | | Journal (article/letter/editorial) | | within eclogites. Transformation of gabbro into eclogite is documented in different stages ranging from...Typical eclogite parageneses are Grt + Omp + Zo + Ky + Qtz + Amp k Phe + Rut. The metapelitic eclogite host...Sm-Nd mineral isochrons (Pl-Cpx) for the gabbroic eclogite precursors give ages of between 247 + 16 and 255...L- 5, 101 + 7 and 109 + 8 Ma. The metapelitic eclogite host rocks (mica schists) yield Nd DM (depleted...Ma. Keywords: Sm-Nd mineral dating; Eclogite; Gabbro-eclogite transition; High-P metamorphism; Alpine |  | Miller, C., Thöni, M., Konzett, J., Kurz, W., Schuster, R. (2005) Eclogites from the Koralpe and Saualpe type-localities, Eastern Alps, Austria. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 150. | Journal (article/letter/editorial) | | 590 °C at 250-270 Ma; HABLER & THÖNI, 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...al. (2004) and unpublished data. The cumulate eclogite types are Mg-rich and characterized by low TiO2 |  | | 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; P–T path; Dabie orogen. INTRODUCTION...diamond-bearing eclogites from the south Dabie eclogite belt (Okay et al., 1989; Wang et al., 1989; Xu...739–866°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 |  | Berezin, A. V., Skublov, S. G., Marin, Yu. B., Mel’nik, A. E., Bogomolov, E. S. (2013) New occurrence of eclogite in the Belomorian mobile belt: Geology, metamorphic conditions, and isotope age. Doklady Earth Sciences, 448 (1) 43-53 doi:10.1134/s1028334x13010029 | Journal (article/letter/editorial) | | 1, pp. 64–75. GEOCHEMISTRY New Occurrence of Eclogite in the Belomorian Mobile Belt: Geology, Metamorphic...2012 DOI: 10.1134/S1028334X13010029 Finds of eclogitelike associations within the Belo morian mobile...Geochronology) in the 1950s. We discovered a number of new eclogite bodies on the islands of the Keretskii archipelago... 100 km Fig. 1. Geological scheme of the eclogite outcrop on the northwestern coastal part of Sidorov...to ~620°C and ~14 kbar with transition to the eclogite facies (Pl– Ky–Omph subfacies); (3) evolution |  | | Journal (article/letter/editorial) | | both d18O and dD. Grnets from coesite-bearing eclogite are as low as 211‰ (VSMOW) and rutiles are 215‰...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 world’s 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 |  | 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 classified 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 |  | 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) | | (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...western part of the area. Migmatites hosting the eclogite bodies yielded zircon core ages of ca. 1657–1591 |  | | Journal (article/letter/editorial) | | for the interpretation of controversial gneiss–eclogite relationships in other UHP metamorphic terrains...have tentatively defined as the Central Dabie UHP Eclogite-Bearing Terrane Žsee Fig. 1, and Carswell et al... which shows the regional extent of a coesite–eclogite facies unit within the dominant orthogneiss lithologies...1996. have published maps for the Shuanghe UHP eclogite locality that show the eclogites interlayered...orthogneisses and UHP schists from the Central Dabie UHP eclogite-bearing terrane. 2. Field occurrences and whole |  | Matsumoto, M., Wallis, S., Aoya, M., Enami, M., Kawano, J., Seto, Y., Shimobayashi, N. (2003) Petrological constraints on the formation conditions and retrograde P-T path of the Kotsu eclogite unit, central Shikoku. Journal of Metamorphic Geology, 21 (4) 363-376 doi:10.1046/j.1525-1314.2003.00449.x | Journal (article/letter/editorial) | | conditions and retrograde P–T path of the Kotsu eclogite unit, central Shikoku M. MATSUMOTO,1,2 S. WALLIS...Japan ABSTRACT A largely undocumented region of eclogite associated with a thick blueschist unit occurs...coexisting garnet and omphacite suggests that the Kotsu eclogite formed at peak temperatures of around 600 C synchronous...significant differences in oxygen fugacity of the eclogite reflected in mineral chemistries. The peak pressure...history recorded by the eclogite, and the composition of omphacite in associated eclogite facies pelitic schist |
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