 | | 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...cylinder apparatus (calibrated against the albite = jadeite + quartz reaction at 600 and 800°C) adopting full...of Experimental Petrology, University of Milan, Italy. Table 1 List of the investigated mica samples |  | | 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 Liguro– ...Liguro–Piemontese 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 |  | 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) | | 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) | | 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) | | 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, 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;...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...al., 2005). A recent study indicated that some eclogite boundins also have a ACCEPTED MANUSCRIPT continental |  | 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...13-19'/0 grossular. The omphacite contains 45-48% jadeite. A little amount of phengite, with abnormal high...high B, value of 9.075A, occurs in the eclogite. The hornblende is the ultra-high pressure type, i.e. barroisite |  | 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; |  | 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 |  | | 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...UHP eclogite locality that show the eclogites interlayered with pelitic schists, marble, jadeite-bearing...orthogneisses and UHP schists from the Central Dabie UHP eclogite-bearing terrane. 2. Field occurrences and whole |  | | Journal (article/letter/editorial) | | metabasites: a case study using the Tso Morari UHP eclogite Ruiguang Pan1 · Catherine A. Macris1 · Carrie...pressure–temperature (P–T) paths of metabasites. In this paper, eclogite from the Tso Morari UHP terrane, NW India, is...Metabasites · Thermodynamic modeling · Tso Morari · UHP eclogite · P–T 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) | | 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...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,...retrograde granulite facies overprint after coesite–eclogite facies metamorphism has been recognized by Wang |  | | 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 |  | WEI, C. J., YANG, Y., SU, X. L., SONG, S. G., ZHANG, L. F. (2009) Metamorphic evolution of low-Teclogite from the North Qilian orogen, NW China: evidence from petrology and calculated phase equilibria in the system NCKFMASHO. Journal of Metamorphic Geology, 27 (1) 55-70 doi:10.1111/j.1525-1314.2008.00803.x | Journal (article/letter/editorial) | | 1525-1314.2008.00803.x Metamorphic evolution of low-T eclogite from the North Qilian orogen, NW China: evidence...for amphibole and clinopyroxene. Garnet in the eclogite typically exhibits growth zonations in which pyrope...of lawsonite-eclogite facies at the pre-peak stage. Omphacite shows an increase in jadeite component as...compositions, paragonite formed. The decompression of eclogite did not lead to pronounced changes in garnet and...compositions. Peak P–T conditions of the North Qilian eclogite are well constrained using both the average P–T |  | | Journal (article/letter/editorial) | | elsevier.com/locate/gr Discovery of Early Paleozoic eclogite from the East Kunlun, Western China and its tectonic...June 2012 Handling Editor: Z. Zhang Keywords: Eclogite Geochronology Early Paleozoic HP metamorphism...grossularite and 16–29% pyrope, and the omphacite has a jadeite content of 21–63%. The peak-metamorphic assemblage...the inherited magmatic zircons from fine-grained eclogite reveals a Neoproterozoic age of 934 Ma, representing...the protolith age of the eclogite. Zircons from the coarse-grained eclogite contain inclusions of garnet |  | | 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 |  | | 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...Minimum pressure conditions are recorded by the jadeite+quartz=albite geobarometer at 1.8–2.0 GPa. A near-isothermal...pargasite-plagioclase. U-Pb IDTIMS zircon geochronology of the eclogite yields a weighted mean 207Pb/206Pb date of 1,904 |  | Kwon, Sanghoon, Sajeev, K., Mitra, Gautam, Park, Youngdo, Kim, Sung Won, Ryu, In-Chang (2009) Evidence for Permo-Triassic collision in Far East Asia: The Korean collisional orogen. Earth and Planetary Science Letters, 279 (3) 340-349 doi:10.1016/j.epsl.2009.01.016 | Journal (article/letter/editorial) | | 13 February 2009 Editor: R.W. Carlson Keywords: eclogite high-pressure granulite clockwise P–T path Imjingang...absence of precise evidence of collision (e.g., eclogite and high-pressure rocks) as well as a general...of the Hongsung area, with the first discovered eclogite in the Korean Peninsula, has been claimed as a...peninsula; the Bibong eclogite [N 36° 29’ 17.6”, E 126° 44’ 44.6”], the Baekdong eclogite [N36° 33′ 29.5″ E...Gyeonggi massif is the recently documented Bibong eclogite (∼230 Ma metamorphic and ∼ 880 Ma protolith ages) |  | | Book (edition) | | . . . . . . . . . . . . . . . . . . . . . 9.8 Eclogite Facies Metamorphism . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . . . . . 9.8.3 Eclogite Facies in Gabbroic Rocks . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . 10.3.4 Eclogite and Blueschist Facies Granitoids . . . . . . ...Introduction and General Aspects of Metamorphism Kyanite-eclogite from Verpeneset, Nordfjord, Norway. Omphacite...rocks in an extensional regime Typical Blueschist, eclogite, serpentinite, Slate, phyllite, schist, gneiss |  | 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) | | 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...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 Sm–Nd ages of eclogite minerals, the time interval between 240 and 200 |  | Cheng, Hao, Zhang, Chao, Vervoort, Jeffrey D., Lu, Honghua, Wang, Chao, Cao, Dadi (2012) Zircon U–Pb and garnet Lu–Hf geochronology of eclogites from the Lhasa Block, Tibet. Lithos, 155. 341-359 doi:10.1016/j.lithos.2012.09.011 | Journal (article/letter/editorial) | | 2012 Available online 2 October 2012 Keywords: Eclogite Geochronology Lhasa Lu–Hf U–Pb Tibet a b s t...this area. A quartzite, together with its host eclogite from the Jilang County in the Lhasa Block of northern...U–Pb geochronology. The composition of the Jilang eclogite is similar to supra-subduction-zone basalts found...the Jilang eclogite most likely reflects garnet growth and is interpreted to reflect eclogite–facies metamorphism...MSWD = 1.1, n = 11) for the magmatic cores of the eclogite suggest that the detrital zircon in quartzite |  | 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 |  | | Journal (article/letter/editorial) | | high metamorphic grade, including blueschist, eclogite, and amphibolite assemblages, and are typically...Ward Creek; and (4) white mica ages of 146.5 Ma (eclogite) and 134 Ma (epidote blueschist) from the Willow...comprising rocks ranging from lawsonite blueschist to eclogite. We also obtained hornblende ages of about 156...equivalent to many high-grade blocks and even include eclogite assemblages. In addition to sampling coherent...Non-Franciscan: Jcro = Coast Range ophiolite; Jkgv = Great Valley Group; Q = Quaternary deposits, undifferentiated |
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