| | 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 Liguroā ...LiguroāPiemontese 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) | 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 | | | 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 omphaciteā 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...and rutile. The garnet is composed of 51-59% almandine, 26-31% pyrope and 13-19'/0 grossular. The omphacite...abnormal high B, value of 9.075A, occurs in the eclogite. The hornblende is the ultra-high pressure type | | | 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) | 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...Pre-alpine assemblages, formed at conditions of the almandine amphibolite facies, were only partly obliterated...Alpine metamorphism in the MC developed under eclogite-facies conditions during the first Alpine metamorphic | | Tan, Zhou, Gao, Jun, Jiang, Tuo, Wang, Xinshui, Zhang, Xi (2019) PāTātime (phengite Ar closure) history of spatially close-outcroppingĀ 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 (ā¤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 ~550Ā°C, 2.50 GPa...prograde metamorphism. In contrast, the UHP layered eclogite experienced UHP peak burial at ~510Ā°C, 2.95 GPa...well-preserved mafic KEYWORDS (U)HP metamorphism; oceanic eclogite; thermodynamic modelling; muscovite ArāAr dating; | | | Journal (article/letter/editorial) | metabasites: a case study using the Tso Morari UHP eclogite Ruiguang Pan1 Ā· Catherine A. Macris1 Ā· Carrie...pressureātemperature (PāT) paths of metabasites. In this paper, eclogite from the Tso Morari UHP terrane, NW India, is...Metabasites Ā· Thermodynamic modeling Ā· Tso Morari Ā· UHP eclogite Ā· PāT paths Ā· 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) | Multistage growth of garnet in ultrahigh-pressure eclogite during continental collision in the Dabie orogen:...2011 Available online 24 August 2011 Keywords: Eclogite Garnet Growth time Mineral inclusions UāPb ages...matrix) were determined on thin sections of UHP eclogite from the western part of the Dabie orogen. The...phase and the early exhumation from UHP to HP eclogite facies, respectively. Ā© 2011 Elsevier B.V. All...lawsonite-blueschist facies to ultrahigh-pressure (UHP) eclogite-facies (e.g., Ganguly and Saxena, 1987; Wang et | | Tan, Zhou, Agard, Philippe, Gao, Jun, John, Timm, Li, JiLei, Jiang, Tuo, Bayet, LĆ©a, Wang, XinShui, Zhang, Xi (2017) PāTātime-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 Ā± 20 ā at 316.8 Ā± 0.8 Ma, then, with eclogite-facies deformation ~ 2.0 Ā± 0.15 GPa, 525 Ā± 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 | | 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 PāT 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 ļ¬rst discovered eclogite in the Korean Peninsula, has been claimed as a...peninsula; the Bibong eclogite [N 36Ā° 29ā 17.6ā, E 126Ā° 44ā 44.6ā], the Baekdong eclogite [N36Ā° 33ā² 29.5ā³ E...Gyeonggi massif is the recently documented Bibong eclogite (ā¼230 Ma metamorphic and ā¼ 880 Ma protolith ages) | | 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 | | Miller, C., Thƶni, M., Konzett, J., Kurz, W., Schuster, R. (2005) Eclogites from the Koralpe and Saualpe type-localities, Eastern Alps, Austria. Mitteilungen der Ćsterreichischen 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 Ā°C at 250-270 Ma; HABLER & THĆNI, 2001), and eclogite facies (2.4 GPa and 650-730Ā°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 | | 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...formed mainly in the PāT conditions of lawsonite-eclogite facies at the pre-peak stage. Omphacite shows...compositions, paragonite formed. The decompression of eclogite did not lead to pronounced changes in garnet and...compositions. Peak PāT conditions of the North Qilian eclogite are well constrained using both the average PāT | | Schmidt, Alexander, Weyer, Stefan, Mezger, Klaus, Scherer, Erik E., Xiao, Yilin, Hoefs, Jochen, Brey, Gerhard P. (2008) Rapid eclogitisation of the DabieāSulu UHP terrane: Constraints from LuāHf garnet geochronology. Earth and Planetary Science Letters, 273 (1) 203-213 doi:10.1016/j.epsl.2008.06.036 | Journal (article/letter/editorial) | Keywords: LuāHf geochronology SmāNd 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 SmāNd ages of eclogite minerals, the time interval between 240 and 200 | | | 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 | | Liu, Yan, Santosh, M., Zhao, Zhong Bao, Niu, Wen Chao, Wang, Gen Hou (2011) Evidence for palaeo-Tethyan oceanic subduction within central Qiangtang, northern Tibet. Lithos, 127 (1) 39-53 doi:10.1016/j.lithos.2011.07.023 | Journal (article/letter/editorial) | a c t The mechanism of formation of blueschistāeclogite belts and their space-time distribution are important...and 490 Ā°C (lawsonite eclogite ļ¬eld) to about 1.68 GPa and 535 Ā°C (epidote eclogite ļ¬eld), marking an initial...(Fig. 1). The widespread occurrence of blueschistāeclogite rocks in this region suggests that the central...schist, marble, quartzite, pillow basalt, gabbro, eclogite, garnet blueschists, garnet amphibolite and minor..., 2006b). Recent LuāHf isotopic dating of the eclogite from Gemo area within this belt (Fig. 1) yielded | | | 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...garnets show end-member components of 48ā55% almandine, 1ā2% spessartine, 19ā29% grossularite and 16ā29%...the inherited magmatic zircons from ļ¬ne-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) | 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 | | Cheng, Hao, Zhang, Chao, Vervoort, Jeffrey D., Lu, Honghua, Wang, Chao, Cao, Dadi (2012) Zircon UāPb and garnet LuāHf 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 LuāHf UāPb Tibet a b s t...this area. A quartzite, together with its host eclogite from the Jilang County in the Lhasa Block of northern...UāPb geochronology. The composition of the Jilang eclogite is similar to supra-subduction-zone basalts found...the Jilang eclogite most likely reļ¬ects garnet growth and is interpreted to reļ¬ect eclogiteāfacies metamorphism...MSWD = 1.1, n = 11) for the magmatic cores of the eclogite suggest that the detrital zircon in quartzite | | | Book | CASCADE RANGE HI MODOC PLATEAU COAST RANGES S GREAT VALLEY SI SIERRA NEVADA 21 BASIN RANGES 3Zm MOJAVE DESERT...gravel deposits on the eastern side of the Great Valley Province into which the streams of the Sierra flow...this third lode deposits were found in the Grass Valley District. 8 five of gold (Map 2-1). NATIVE...of the came from the lode mines of the Grass Valley and Nevada City districts (Maps 2-14 and 2-15)...tributaries. ; Photo 2-3. Crystallized gold, Grass Valley District, dimension. Smithsonian collection and | | | Book | ā¢ ID MOOOC PLATEAU I7 COAST RANGES 7 GREAT VALLEY :2f SIERRA NEVADA ~ BASIN RANGES Ell MOJAVE...gravel deposits on the eastern side of the Great Valley Province into which the streams of the Sierra flow...state's richest lode deposits were found in the Grass Valley District. 8 NATIVE ELEMENTS 120 ā¢ ~ -----...this gold came from the lode mines of the Grass Valley and Nevada City districts (Maps 2-14 and 2-15)...Crippen, 1948, Photo 2-3. Crystallized gold, Grass Valley District, Nevada County. Eight cm in largest dimension |
|