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| Abstract From the abundant metre to km-sized eclogite bodies in the Variscan crystalline complex of...Keywords: Saxonian Erzgebirge; Variscan orogen; Eclogite; Protolith; MORB signature; Within-plate signature;...and geochemical systematics among the different eclogite occurrences in the Saxonian Erzgebirge. In particular...rocks, Mica-schist–Eclogite Unit (MEU), Red and Grey Gneiss Unit and Gneiss–Eclogite Unit (GEU), occur...also contains numerous metre to several km-sized eclogite bodies. These metabasic rocks have experienced |
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| University, Tsushima–naka 3–1–1, Okayama 700–8530, Japan ** Division of Earth and Planetary Sciences, Graduate...Kyoto 606–8502, Japan This study examines the effect of jadeite content (Xjd) in omphacite on Fe–Mg distribution...correlation between Fe# [= Fe2+/(Fe2+ + Mg)] of omphacite and Xjd are present. On the other hand, this study...site of omphacite, indicating that excess Fe2+ may be incorporated into M2 site of omphacite with decreasing...Na + K contents and hence total Fe# values of omphacite may become excessively high. Thus, application |
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| and the U/Pb age of zircons from the Hareidland Eclogite in the Western Gneiss Region of Norway D.A. Carswell...other eclogite-facies mineral phases within metamorphic zircons separated from the large eclogite body...these rocks and for the metastable preservation of eclogite-facies mineralogies. D 2003 Elsevier Science B...B.V. All rights reserved. Keywords: Coesite; Eclogite; Zircon; Raman spectroscopy; Age; Norway 1. Background...Background The petrology and petrogenesis of the eclogite on Hareidland, some 23 km SW of the west Norway |
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| homepage: http://www.tandfonline.com/loi/tigr20 Eclogite varieties and petrotectonic evolution of the northern...Martens, Tatsuki Tsujimori & Juhn G. Liou (2016): Eclogite varieties and petrotectonic evolution of the northern...http://dx.doi.org/10.1080/00206814.2016.1245592 Eclogite varieties and petrotectonic evolution of the northern...Sendai, Japan ABSTRACT ARTICLE HISTORY Field and petrologic characteristics of two new eclogite localities...locality exposes a coherent body of retrogressed eclogite hundreds of metres long that is associated with |
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| Petrology of the nyb6ite-bearing eclogite in the Donghai area, Jiangsu Province, eastern China T . HIRAJIMA...Geology and Mineralogy, Kyoto University, Kyoto 606, Japan R. ZHANG, J. Ll AND B. CONG Institute of Geology...Nyb6ite occurs as porphyroblasts in the Jianchang eclogite in the Donghai area, northeastern Jiangsu Province...Province, eastern China. The Jianchang eclogite contains some inclusions of quartz after coesite in clinopyroxene...associated with jadeitic pyroxene in the Jianchang eclogite, although other porphyroblastic amphiboles in |
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| Petrology of the nyb6ite-bearing eclogite in the Donghai area, Jiangsu Province, eastern China T . HIRAJIMA...Geology and Mineralogy, Kyoto University, Kyoto 606, Japan R. ZHANG, J. Ll AND B. CONG Institute of Geology...Nyb6ite occurs as porphyroblasts in the Jianchang eclogite in the Donghai area, northeastern Jiangsu Province...Province, eastern China. The Jianchang eclogite contains some inclusions of quartz after coesite in clinopyroxene...associated with jadeitic pyroxene in the Jianchang eclogite, although other porphyroblastic amphiboles in |
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| range, 450–650 °C and 18–28 kbar: the stability of eclogite G. REBAY,1 R. POWELL2 AND J. F. A. DIENER3 1 Dipartimento...temperature eclogite (with T ¼ 600 °C) represents a significant part of the occurrences of eclogite in orogenic...orogenic belts. ÔTrueÕ eclogite, with, for example, garnet + omphacite >70%, is well represented in such...such an occurrence. Calculated phase equilibria in Na2O–CaO–K2O–FeO–MgO–Al2O3– SiO2–H2O–TiO2–O (NCKFMASHTO)...are used to see under what circumstances ÔtrueÕ eclogite is predicted to occur. The variables considered |
 | Li, Xu-Ping, Yan, Ji-Yuan, Schertl, Hans-Peter, Kong, Fan-Mei, Xu, Hong (2014) Eclogite from the Qianliyan Island in the Yellow Sea: a missing link between the mainland of China and the Korean peninsula. European Journal of Mineralogy, 26 (6) 727-741 doi:10.1127/ejm/2014/0026-2403 | Journal (article/letter/editorial) |
| DOI: 10.1127/ejm/2014/0026-2403 PrePub Article Eclogite from the Qianliyan Island in the Yellow Sea: a...South Yellow Sea of China, lenses and layers of eclogite and two-mica epidote–plagioclase gneiss occur...occur within granitic gneiss. From the eclogite, peak metamorphic conditions of 775 C, 2.6 GPa were defined...defined using compositions of garnet mantle zones, omphacite inclusions, and homogeneous phengite cores with...with high Si contents. During exhumation, the eclogite underwent different stages of retrogression, i.e |
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| Gittidas, but belong to the same suite as the garnet-omphacite-phengite-quartz-rutile eclogites previously described...assemblage is garnet omphacite-rutile-quartz in glaucophane eclogite and garnet-omphacite-zoisiterutile _+kyanite..._+kyanite _+phengite _+ankerite in barroisite eclogite. Most samples contain a significant amount of amphibole...barroisite in most samples, but in relatively Fe-rich eclogite it is glaucophane with significant Na in the A...from Fe/Mg partition in garnet omphacite pairs, and from the garnet-omphacite-phengite barometer. These values |
 | 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) |
| 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...Hornelen Ultramafic bodies: GU - garnetiferous Eclogite with prograde zoned garnets and no evidence for...for coesite. G = glaucophane Florø Eclogite with coesite or polycrystalline quartz, mostly with unzoned...corresponds to the average for the Sm–Nd garnet-omphacite mineral pair ages of five eclogites determined |
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| Science Letters 123 (1994) 61-70 Newly discovered eclogite in the southern Appalachian orogen, northwestern...first reported eclogite (sensu stricto) in the southern Appalachian orogen. The eclogite occurs at the...primary metamorphic assemblage in the eclogite is garnet + omphacite + quartz + rutile. Hornblende and plagioclase...facies phases in the eclogite. Pressure-temperature estimates for the primary eclogite assemblage are consistent...also occur within the shear zone containing the eclogite. The presence of high-pressure metamorphic rocks |
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| microstructures in garnet, titanite and clinozoisite from an eclogite of the Lower Schist Cover, Tauern Window, Austria...Universität Berlin, D-1063 Berlin Abstract: An eclogite sample from the Lower Schist Cover of the Tauern...few tens of metres distant from the intercalated Eclogite Zone, was studied by transmission electron microscopy...explained as the result of imbrication of the Eclogite Zone. Key-words: garnet, titanite, clinozoisite...Introduction Transmission electron microscopy (TEM) of eclogite minerals from the Tauern Window reveals a fascinating |
 | 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; |
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| Chain multiplicity faults in deformed omphacite from eclogite WOLFGANG FRIEDRICH MÜLLER1*, FRANK E. BRENKER2...Germany Abstract: Deformed and recovered omphacite from an eclogite sample of the Lower Schist Cover of the...1997), shows chain multiplicity faults (CMFs) in omphacite which have not yet been described. The CMFs are...chains parallel to (010) in the single chain omphacite. They are mostly terminated by partial dislocations...slip planes is given. The frequent occurrence of CMFs in omphacite suggests that 1/2[011](010) is an important |
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| s ev i e r. c o m / l o c a t e / l i t h o s Eclogite from the ultrahigh-pressure metamorphic unit at...ransmission electron microscopy Coesite–eclogite Crystal defects Omphacite Amphibole a b s t r a c t In the...metamorphism. We have studied the minerals of two eclogite samples from this unit using transmission electron...pressure eclogites. In our TEM-study we found omphacite, amphibole (barroisite, glaucophane, hornblende)...layers of chlorite and mica in amphibole. The omphacite is well-ordered and has the space-group P2/n. |
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| Netherlands Sm-Nd isotopic systematics of a gabbro-eclogite transition MAI BRITT E. MORK* and EUAN W. MEARNS...of a gabbro-eclogite transition. In: W.L. Griffin (Editor), Second International Eclogite Conference....transition to eclogite; (2) coronitic leuco-gabbro norite; and (3) country-rock eclogite, all from the...original igneous Nd isotopic composition. Results for eclogite minerals suggest Caledonian ages, but these phases...texturally equilibrated and strongly deformed eclogite within adjacent gneisses have been disturbed on |
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| – 265 www.elsevier.com/locate/lithos Kyanite eclogite xenolith from the orthogneiss terrane of the Tisza...2007 Abstract New evidence for high-pressure, eclogite facies metamorphism in the crystalline basement...(southern Hungary) is reported. The retrogressed mafic eclogite forms a small lens in the orthogneiss and it was...Jánoshalma. The carbonated eclogite contains the peak metamorphic assemblage omphacite + garnet + phengite +...clinozoizite + rutile + K-feldspar + quartz. Omphacite (Xjd0.40–0.41Xdio0.52–0.53Xhd0.05Xaug1.55–2.85) |
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| glaucophane-bearing eclogite, and 16 kbar at 600 + 50 8C for the Tin Hama phengite eclogite, values indicative...high-pressure metamorphism. We describe here the first occurrence of Precambrian glaucophane sensu stricto and...metapelites and quartz-schists, with the local occurrence of Mn-rich garnet in metapelites and of pale...the east of the Bourré massif. The ubiquitous occurrence of phengite þ garnet þ rutile mineral assemblages...SE of Tin Hama (Fig. 2). This latter eclogitic occurrence has the major element composition of a K-poor |
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| region of the central Tauern Window, east of the Eclogite Zone. A four-stage metamorphic evolution has been...peak-metamorphic paragenesis (stage II) of garnet, omphacite, paragonite, glaucophane, (clino)zoisite, quartz...570°C, slightly below those reported from the Eclogite Zone (around 600°C, 20 kbar). In several instances...occurred during uplift, apparently still within the eclogite facies (stage III). As it is impossible to reconcile...observed amphibole growth textures at the expense of omphacite, glaucophane, garnet, paragonite and quartz with |
 | KIENAST, J. R., LOMBARDO, B., BIINO, C., PINARDON, J. L. (1991) Petrology of very-high-pressure eclogitic rocks from the Brossasco-Isasca Complex, Dora-Maira Massif, Italian Western Alps. Journal of Metamorphic Geology, 9 (1) 19-34 doi:10.1111/j.1525-1314.1991.tb00502.x | Journal (article/letter/editorial) |
| rocks with a strong preferred orientation of omphacite crystals and white micas. Porphyroblasts of hornblende...whiteschist. Sodic pyroxene in the eclogites is an omphacite often close to Jd,Dim, with very little acmite...instead indicating a close similarity to some of the eclogite bodies occurring in the Adula nappe of the Central...Western Alps; eclogite; glaucophane stability; whiteschist. INTRODUCTION The occurrence of eclogite rocks is...high-pressure (HP) conditions, since most country rocks to eclogite are apparently devoid of HP mineral assemblages |
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| Dasgupta Keywords: eclogite warm subduction zones arc magmatism gabbro-to-eclogite transition earthquakes...transitions from dry, rigid gabbro to hydrated eclogite and eclogite mylonite, which occurred when these rocks...arc magmatism is indirectly indicated by the occurrence of magmatic gaps in subduction zones where, instead...thermodynamic would predict; the transition of gabbro to eclogite is extremely fluid-limited and remains overstepped...that results in the infiltration of fluids and the occurrence of faroverstepped mineral reactions (Austrheim |
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| are interpreted as metagabbros. Recently, two eclogite occurrences, one hosted by serpentinite, the second...Gulsen mountain, W oft he Mur valley, showing the eclogite occurrences (location numbers 1 and 6) within...15 cm (Fig. 4). Based on the shape and type of occurrence, two dominating types of chromitites can be distinguished:...mantle/crust boundary (MALITCH et al., 2003a). The occurrence of chromitites, predominantly as schlieren and...S-poor partial melt portions in conduits. The occurrence of fluid inclusions within chromites indicates |
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| are interpreted as metagabbros. Recently, two eclogite occurrences, one hosted by serpentinite, the second...Gulsen mountain, W oft he Mur valley, showing the eclogite occurrences (location numbers 1 and 6) within...15 cm (Fig. 4). Based on the shape and type of occurrence, two dominating types of chromitites can be distinguished:...mantle/crust boundary (MALITCH et al., 2003a). The occurrence of chromitites, predominantly as schlieren and...S-poor partial melt portions in conduits. The occurrence of fluid inclusions within chromites indicates |
 | Bukała, Michał, Klonowska, Iwona, Barnes, Christopher, Majka, Jarosław, Kośmińska, Karolina, Janák, Marian, Fassmer, Kathrin, Broman, Curt, Luptáková, Jarmila (2018) UHP metamorphism recorded by phengite eclogite from the Caledonides of northern Sweden:P-Tpath and tectonic implications. Journal of Metamorphic Geology, 36 (5) 547-566 doi:10.1111/jmg.12306 | Journal (article/letter/editorial) |
| Article UHP metamorphism recorded by phengite eclogite from the Caledonides of northern Sweden: P-T path...conditions of their formation. Within the studied eclogite, clinopyroxene contains a high-Na core and two...three stages in the metamorphic evolution of the eclogite. Applied Quartz-in-Garnet (QuiG) geobarometry...stage) took place at 1.5-1.6 GPa and 620-660°C. The eclogite peak-pressure assemblage developed during the...the E1 stage, it consists of garnet+omphacite+phengite+rutile+coesite? and yields P-T conditions of 2.8-3 |
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| interstitial copper mineralization. The only other eclogite occurrence recorded in Brazil, at Pouso Alegre, state...paper. The comparison with the only other eclogite occurrence known in Brazil (Hoppe et al., 1989), and...and with the cupriferous titanomagnetite ore occurrence at Serrote da Lage, state of Alagoas (Horbach and...geological setting. The Fazenda Boa Esperan~a-Bodoc6 occurrence Some lenses of metamorphosed mafic to ultramafic...optical and X-ray identification of possible omphacite was confirmed by microprobe analyses. 199 PROTEROZOIC |
