 | | Journal (article/letter/editorial) | | alternatively with either BrF5 or F2 gas on crystals of almandine, epidote, forsterite, tourmaline, and zircon....Geophysical laboratory Excimer laser (in situ) Almandine UWG-2 Almandine USNM 107144 Zircon USNM R12984 Epidote...Comparisons Interlaboratory calibration for almandine garnet and zircon validates the accuracy of in...confirmation of in situ analyses. (Table 1 ). For almandine (USNM 107144) and tourmaline there is agreement...chemical analysis profile of Fig. 3 shows that almandine garnet retains its stoichiometry to within a few |  | | Journal (article/letter/editorial) | | Goettingen, Goldschmidtstrasse 1, D-37077 Goettingen, Germany ABSTRACT The Qinglongshan O- and H-isotope anomaly...CCSD-PPH1 drill core samples. Goettingen University, Germany. The analyses were performed at 15 kv, 12 na beam...the Geoscience Center, Goettingen University, Germany using an ultraviolet laser isotope microprobe system...= 2.2 to 2.9 wt%, pyrope (Prp) = 65−72 mol%, almandine (Alm) = 14−21%, andradite (And) = 2−5%, grossularite...In contrast, eclogitic garnet contains higher almandine and grossular with a compositional range of Alm |  | Higashino, Fumiko, Rubatto, Daniela, Kawakami, Tetsuo, Bouvier, Anne‐Sophie, Baumgartner, Lukas P. (2019) Oxygen isotope speedometry in granulite facies garnet recording fluid/melt–rock interaction (Sør Rondane Mountains, East Antarctica) Journal of Metamorphic Geology, 37 (7) 1037-1048 doi:10.1111/jmg.12490 | Journal (article/letter/editorial) | | UWG-2 garnet (δ18O = 5.8 ‰, Valley, Kitchen, Kohn, Niendorf, & Spicuzza, This article is protected by copyright...25-37. Valley, J. W., Kitchen, N., Kohn, M. J., Niendorf, C. R., & Spicuzza, M. J. (1995). UWG-2 , a garnet...line shows the garnet corerim boundary. (b-d) Almandine, pyrope, grossular and spessartine composition...aluminium garnet (Haneda et al., 1984); ZF98_alm, Almandine (Zheng & Fu, 1998); V05_grs, Grossular (Vielzeuf |  | | Journal (article/letter/editorial) | | report intra-crystalline δ18O heterogeneities in almandine-pyrope garnets (Kohn et al. 1993; Young and Rumble...between zones I and II. (b to e) Spessartine, almandine, pyrope, and grossular zoning profiles (in mol%)...zoning Intra-crystalline δ18O heterogeneities in almandine-pyrope garnets reported in the literature (e.g...intracrystalline heterogeneities reported so far in almandine metamorphic-magmatic garnets by in situ measurements...contrasted δ18O signatures. In their study of almandine garnets in calc-alkaline volcanic rocks from Hungary |  | Vielzeuf, Daniel, Champenois, Michel, Valley, John W., Brunet, Fabrice, Devidal, J.L. (2005) SIMS analyses of oxygen isotopes: Matrix effects in Fe–Mg–Ca garnets. Chemical Geology, 223 (4) 208-226 doi:10.1016/j.chemgeo.2005.07.008 | Journal (article/letter/editorial) | | SpeSE UWG-2 Almandine–Grossular Almandine–Pyrope Almandine–Pyrope Almandine–Pyrope Almandine–Pyrope Grossular...Pyrope Pyrope Pyrope Pyrope Spessartine Pyrope–Almandine Alm66Grs20And7Spe4Prp3 Alm68Prp26Spe2And2Grs1...the major components: (X 2+)3 ( Y 3+)2 (SiO4)3 Almandine Pyrope Spessartine Grossular Andradite Uvarovite...4 6.9 12.3 9.3 5.8 End members Grossular Almandine Pyrope Spessartine Andradite Uvarovite Ti–Al garnet...the other. The difference remains small between almandine, pyrope and spessartine end-members (b 2x). Conversely |  | Yui, Tzen-Fu, Chu, Hao-Tsu, Hwang, Shyh-Lung, Shen, Pouyan, Wu, Tsai-Way, Liou, J.G., Sobolev, Nikolay V. (2010) Geochemistry of garnetiferous Ti–clinohumite rock and talc–kyanite–phengite–almandine schist from the Kokchetav UHP terrane, Kazakhstan: An insight to possible origins of some chemically unusual UHP rocks. Lithos, 118 (1) 131-144 doi:10.1016/j.lithos.2010.04.005 | Journal (article/letter/editorial) | | Ti–clinohumite rock and talc–kyanite–phengite– almandine schist from the Kokchetav UHP terrane, Kazakhstan:...Ti–clinohumite rock Whiteschist Talc–kyanite–phengite–almandine schist Kokchetav UHP terrane a b s t r a c t...Kumdy Kol area, as well as talc–kyanite–phengite–almandine schists (previously named as whiteschists) and...Ti–clinohumite rocks and talc–kyanite– phengite–almandine schists are possibly genetically related to eclogites...rock–fluid interactions. Talc–kyanite–phengite–almandine schists from the Kulet area are typically low |  | | Journal (article/letter/editorial) | | fractionation of oxygen isotopes among zircon, almandine-rich garnet, titanite, and quartz are combined...report an empirical calibration of zircon vs. almandine-rich garnet of AZrc-Alm 0.0 ⫾ 0.2‰K2. King et... Peck Table 1. Values of ␦18O of zircons and almandine-rich garnets from granulite facies orthogneisses...igneous; meta. ⫽ metamorphic. Minerals: Alm ⫽ almandine; And ⫽ andradite; Cc ⫽ calcite; Grs ⫽ grossular;...fractionation of oxygen isotopes between zircon, quartz, almandine, grossular, and titanite.a X: Zrc Alm Grs Ttn |  | ZHAO, Z.-F., ZHENG, Y.-F., GAO, T.-S., WU, Y.-B., CHEN, B., CHEN, F.-K., WU, F.-Y. (2006) Isotopic constraints on age and duration of fluid-assisted high-pressure eclogite-facies recrystallization during exhumation of deeply subducted continental crust in the Sulu orogen. Journal of Metamorphic Geology, 24 (8) 687-702 doi:10.1111/j.1525-1314.2006.00662.x | Journal (article/letter/editorial) | | dilution techniques at University of Tuebingen, Germany. Mineral powders were completely decomposed in...minerals (data refer to Table 5). Grt, garnet (almandine); Di, diopside; Ms, muscovite; Rt, rutile; Zr...(2001) Dennis & Freer (1993) Garnet refers to almandine. Ô//aÕ refers to parallel to a-axis. The calculations...cations (Fe, Mn and Ca) across an interface between almandine core and spessartine-grossular overgrowth during...diffusivity between the same mineral structures (e.g. almandine and pyrope, muscovite and phengite, and diopside |  | | Journal (article/letter/editorial) | | that span the compositional range of pyrope, almandine, grossular, spessartine, and andradite were analyzed...5.60 5.92 5.50 5.50 5.30 7.39 6.49 6.14 6.37 Almandine AlmSE AlmCMG 2B3 Beta114 Bal509 UWG-2 13-63-21...slightly more dilute almandine (AlmSE & AlmCMG), and one intermediate almandine-pyrope (UWG-2) that is...addition, they included one more standard on the almandine–grossular join (2B3). Detailed information on...eclogitic xenoliths in kimberlite with intermediate almandine–pyrope compositions and from 7 to 61 mol % grossular |  | | Journal (article/letter/editorial) | | (see text). been empirically constrained in almandine–pyrope garnet by Valley et al. (2003). By this...were 200 s (at c. 4000 cps), and analyses used almandine and diopside standards for major elements. Three...studied garnet are low (c. 5 mol.%), and that almandine and pyrope contents vary by c. 10 mol.% between...between grossular and almandine fractionation factors). Therefore, we use the almandine fractionation factor...VSMOW) Fig. 3. d18O(Qtz) v. d18O(Grt) diagram for almandine-rich garnet in samples from the Irving Pond area |  | | Journal (article/letter/editorial) | | poor in Ca showing minor variations along the almandine–spessartine join [(Fe,Mn)3Al2Si3O12]. Although...garnet (Kakanui, New Zealand, KAK), (b) igneous almandine-rich garnet (Erongo, Namibia, ERO-R), (c) hydrothermal...reference material for oxygen and iron isotopes. 2.2. Almandine-spessartine rich garnet (Erongo Region, Namibia;...Schorlomite-Al Morimotoite Spessartine Pyrope Almandine Grossular Andradite ERO-G 1s (0.3) – (0.17) –...Sr* < 0.02, Sr* = (PrN þ NdN)/2). 4.1.2. ERO-R almandine-spessartine rich garnet (Erongo Region, Namibia) |  | | Journal (article/letter/editorial) | | hornblendite with pargasitic hornblende, pyrope±almandine garnet, and clinopyroxene, · a monomineralic clinopyroxene...Garnets from the original hornblendite contain almandine (35±45%), pyrope (25±35%), grossular (18±22%)...garnet±clinopyroxene layer are comprised of grossular (65±75%), almandine (15±20%) and andradite (10±15%). The pyrope content...isotope compositions of the relatively Ca-poor almandine±pyrope garnet and clinopyroxene are identical...Lett 101:196±205 Valley JW, Kitchen N, Kohn MJ, Niendorf CR, Spicuzza MJ (1995) UWG-2, a garnet standard |  | | Journal (article/letter/editorial) | | Research Centre for Geosciences, 14473 Potsdam, Germany Subduction of oceanic and continental crust is...8 0.7 Pyrope LSZ23 external rim Grossular Almandine Spessartine LSZ23 core LSZ23 internal rim ...domains (core– rim) expressed in mole per cent of almandine, pyrope, grossular and spessartine. Data for each... Grs11–16, Sps1.4–3.0, Alm62–68), with equal almandine component (see also Angiboust et al. 2011). Chemical...composition expressed in mole % of a pyrope, b almandine, c grossular and d spessartine. Grey arrows in |  | | Journal (article/letter/editorial) | | 99 1.71 0.16 0.37 0.75 End member X pyrope X almandine X spessartine X grossular 0.04 0.44 0.24 0.28...partly resorbed. They are almandine and grossularrich (Table 1, Fig. 4, X almandine c 0.33, X grossular c...δ18O including error and beam size X pyrope X almandine X spessartine X grossular 0.4 0.3 0.2 0.1 0 ...composition, both types of garnet are almandine-rich (X almandine c 0.50, Fig. 5, profiles B and D, and...profiles B and D), where X spessartine increases, X almandine and X pyrope decrease and Fe / (Fe + Mg) ratio |  | Pernet-Fisher, John F., Howarth, Geoffrey H., Liu, Yang, Barry, Peter H., Carmody, Laura, Valley, John W., Bodnar, Robert J., Spetsius, Zdislav V., Taylor, Lawrence A. (2014) Komsomolskaya diamondiferous eclogites: evidence for oceanic crustal protoliths. Contributions to Mineralogy and Petrology, 167 (3) doi:10.1007/s00410-014-0981-y | Journal (article/letter/editorial) | | metamorphosed, subducted oceanic crustal protolith. Using almandine contents, this suite can be divided into two subgroups:...group B1, with a high almandine component ([20 mol%) and group B2, with a low almandine Communicated by T...K9, K14). Notably, similar subgroups based on almandine components have been observed from eclogites worldwide...Taylor and Neal (1989), based on relative pyrope, almandine, and grossular proportions, as this classification...group B of this classification scheme. Based on almandine content, this suite can be further divided into |  | Russell, Ashley K., Kitajima, Kouki, Strickland, Ariel, Medaris, L. Gordon, Schulze, Daniel J., Valley, John W. (2013) Eclogite-facies fluid infiltration: constraints from δ18O zoning in garnet. Contributions to Mineralogy and Petrology, 165 (1) 103-116 doi:10.1007/s00410-012-0794-9 | Journal (article/letter/editorial) | | See text for explanation. Abbreviations: Alm almandine, Grs grossular; Prp pyrope, Sps spessartine 2...variability. The majority of orogenic garnets are almandine-rich (Alm) with little spessartine (Sps) component...LC2G14 (14); and LC2G16 (15). Abbreviations: Alm almandine, Sps spessartine, Grs grossular, Prp pyrope, Acm...Toronto, pp 19–63 Valley JW, Kitchen N, Kohn MJ, Niendorf CR, Spicuzza MJ (1995) UWG-2, a garnet standard...crustal root in the Variscan Erzgebirge Dome (Saxony/Germany). J Geodyn 33:281–314 Yui TF, Rumble D, Lo CH (1995) |  | | Journal (article/letter/editorial) | | SIMS analyses and plots of the mole fraction of almandine and the d18O value versus distance from the rim...SIMS analyses and plots of the mole fraction of almandine and the d18O value versus distance from the rim...average values calculated. The mole fractions of almandine (Xalm), pyrope (Xprp), grossular (Xgrs), and spessartine...calculated from oxide wt%. All garnets analyzed are almandine-rich with values of Xalm ranging from 0.51 to... Contrib Mineral Petrol Fig. 6 The mole fractions of almandine (Xalm), pyrope (Xprp), grossular (Xgrs), and spessartine |  | | Journal (article/letter/editorial) | | intracrystalline analysis of silicate minerals. Analyses of almandine, forsterite, and schorl of known isotopic compositions...Coutts, and D. Kapitan Table 1. Analyses of almandine garnet, Smithsonian Institution specimen 107144...225–234. Valley J. W., Kitchen N., Kohn M. J., Niendorf C. R., and Spicuzza M. J. (1995) UWG-2, a garnet |  | | Journal (article/letter/editorial) | | Q (KJ/mol) lnD0 (cm2/s) Reference Almandine Garnet Almandine Pyrope Diopside Diopside Omphacite Nd...the rates of Sm-Nd diffusion in diopside and almandine increase with decreasing pressure (Sneeringer...347–368. Valley J. W., Kitchen N., Kohn M. J., Niendorf C. R., and Spicuzza M. J. (1995) UWG-2, a garnet |  | Riches, Amy J.V., Liu, Yang, Day, James M.D., Spetsius, Zdislav V., Taylor, Lawrence A. (2010) Subducted oceanic crust as diamond hosts revealed by garnets of mantle xenoliths from Nyurbinskaya, Siberia. Lithos, 120 (3) 368-378 doi:10.1016/j.lithos.2010.09.006 | Journal (article/letter/editorial) | | C) based on the molar proportions of pyrope, almandine, and grossular (Fig. 3). Many individual xenoliths...Total Mg# Ca/(Ca + Mg) (mol.) Pyrope (mol.%) Almandine Spessartine Grossular Sc (ppm) Ti V Cr Co Ni Rb...= pyrope, Alm = almandine, Grs = grossular). Arrow 1 indicates increasing almandine content, whereas...grossular contents but varying molar proportions of almandine (i.e., arrow 2 of Fig. 3a). The majority (85%)...343–385. Valley, J.W., Kitchen, N., Kohn, M.J., Niendorf, C.R., Spicuzza, M.J., 1995. UWG-2, a garnet standard |  | | Journal (article/letter/editorial) | | ln␣(Diopside-Almandine) ⫽ ⫺0.20 ⫻ 106/(T2) (Kohn and Valley, 1998a) 1000 ln␣(Almandine-Zircon) ⫽ 0.0...187– 206. Valley J. W., Kitchen N., Kohn M. J., Niendorf C. R., and Spicuzza M. J. (1995) UWG-2, a garnet |  | Cheng, H., DuFrane, S. A., Vervoort, J. D., Nakamura, E., Zheng, Y.-F., Zhou, Z. (2010) Protracted oceanic subduction prior to continental subduction: New Lu-Hf and Sm-Nd geochronology of oceanic-type high-pressure eclogite in the western Dabie orogen. American Mineralogist, 95 (8) 1214-1223 doi:10.2138/am.2010.3307 | Journal (article/letter/editorial) | | sampling was performed using a Geolas 2005 (MicroLas, Germany) system equipped with a 193 nm Arf-excimer laser...defined by the overlapping grossular (0.26), almandine (0.47), and pyrope (0.25) compositional isopleths...garnets: Experimental determination in spessartine-almandine diffusion couples, evaluation of effective binary...Colorado. Valley, J.W., Kitchen, N., Kohn, M.J., Niendorf, C.R., and Spicuzza, M.J. (1995) UWG-2, a garnet |  | GORDON, S. M., LUFFI, P., HACKER, B., VALLEY, J., SPICUZZA, M., KOZDON, R., KELEMEN, P., RATSHBACHER, L., MINAEV, V. (2012) The thermal structure of continental crust in active orogens: insight from Miocene eclogite and granulite xenoliths of the Pamir Mountains. Journal of Metamorphic Geology, 30 (4) 413-434 doi:10.1111/j.1525-1314.2012.00973.x | Journal (article/letter/editorial) | | Universität Bergakademie Freiberg, D-09599 Freiberg, Germany 6 Tajik Academy of Sciences, 734063 Dushanbe, Tajikistan...Publishing Ltd 900 °C 00 Fig. 3. (a) Grossular–almandine–pyrope compositions of garnet. Arrows show core...continuous increase in grossular and decrease in both almandine and pyrope from core to rim. The DK84 garnet has...Na2O–CaO–K2O– FeO–MgO–Al2O3–SiO2. Ab = albite; Alm = almandine; Di = diopside; Grs = grossular; Hd = hedenbergite;...CRUST IN ACTIVE OROGENS 13 X pyrope X grossular X almandine X jadeite 20 DK32 Fsp Grt Cpx Qz 20 z yQ s |  | Martin, Laure A.J., Rubatto, Daniela, Crépisson, Céline, Hermann, Joerg, Putlitz, Benita, Vitale-Brovarone, Alberto (2014) Garnet oxygen analysis by SHRIMP-SI: Matrix corrections and application to high-pressure metasomatic rocks from Alpine Corsica. Chemical Geology, 374. 25-36 doi:10.1016/j.chemgeo.2014.02.010 | Journal (article/letter/editorial) | | grossular (Ca3Al2Si3O12), pyrope (Mg3Al2Si3O12), almandine (Fe3Al2Si3O12), spessartine (Mn3Al2Si3O12) and...LEW6 LEW10 Spessartine GRT1A SPEBH 92-W2 Almandine+Pyrope UWG2 BAL509 B114 10691 2B3 GRSSE PRPAA...2σ abs ANDRG 2σ abs 92W2 n Pyrope Grossular Almandine Andradite Spessartine 19 0.01 0.07 0.22 0.01...XGr) b) 09028 Pyrope Grossular Spessartine Mg# Almandine 0.8 Core Rim A B 0.8 0.7 0.5 0.6 0.4 0...285–304. Valley, J.W., Kitchen, N., Kohn, M.J., Niendorf, C.R., Spicuzza, M.J., 1995. UWG-2, a garnet standard |  | | Journal (article/letter/editorial) | | refer to Table 2). Mineral abbreviation: Alm = almandine, Prp = pyrope, Gt = garnet, Di = diopside, Phl...change: rates of Sm-Nd diffusion in diopside and almandine decrease with increasing pressure (Sneeringer...garnets: experimental determination in sepssartine-almandine diffusion couples, evaluation of effective binary...1589–1608. Valley, J.W., Kitchen, N., Kohn, M.J., Niendorf, C.R., and Spicuzza, M.J. (1995) UWG-2, a garnet |
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