 | | Journal (issue) | | USA; Emmanuel Fritsch, University of Nantes, France; Rui Galopim de Carvalho, Portugal Gemas, Lisbon, Portugal;...University, Surrey; Benjamin Rondeau, University of Nantes, France; George R. Rossman, California Institute of...Automated Melee Testing Instrument In August 2017, De Beers’ International Institute of Diamond Grading...Characterization with optical microscopy, Raman spectroscopy, LA-ICP-MS chemical analysis, and UV-Vis-NIR and FTIR...Prospectives. Association Française de Gemmologie, Paris, France, 201–204. Coloration of Green Dravite |  | Garnier, V., Ohnenstetter, D., Giuliani, G., Blanc, P., Schwarz, D. (2002) Mineralogy and Petrology, 76 (3) 179-193 doi:10.1007/s007100200040 | Journal (article/letter/editorial) | | Vandúuvre-les-Nancy, France IRD, Departement Milieux et Environnement, Paris, France 3 URA 7073 CNRS, Universite...Universite Pierre et Marie Curie, Paris, France 4 G ubelin Gemmological Laboratory, Luzern, Switzerland...assemblages: they include fuchsite, Mg±chlorite, almandine, dravite, quartz, white mica, andalusite and tremolite...(calcite, dolomite and rarely siderite), bastnasite [(La, Ce)CO3 (F, OH)], chlorite, adularia, sillimanite...Ti silicate inclusions in the arms cause Al and Cr de®ciencies and variable concentrations of Si, Ca, Ti |  | SOMMER, H., WAN, Y., KRONER, A., XIE, H., JACOB, D. E. (2013) SHRIMP ZIRCON AGES AND PETROLOGY OF LOWER CRUSTAL GRANULITE XENOLITHS FROM THE LETSENG-LA-TERAE KIMBERLITE, LESOTHO: FURTHER EVIDENCE FOR A NAMAQUA-NATAL CONNECTION. South African Journal of Geology, 116 (2) 183-198 doi:10.2113/gssajg.116.2.183 | Journal (article/letter/editorial) | | LOWER CRUSTAL GRANULITE XENOLITHS FROM THE LETSENG-LA-TERAE KIMBERLITE, LESOTHO: FURTHER EVIDENCE FOR A...extracted from intermediate granulites of the Letseng-la-Terae Diamond Mine in northeastern Lesotho provide...add heat from convective mantle through melt flux (De Yoreo et al., 1991; Vanderhaeghe and Duchene, 2010;...localities in southern Africa and the location of Letseng-la-Terae Diamond Mine in the eastern part of Lesotho...relicts of oceanic crust (Matthews, 1972). The Letseng-la-Terae, Matsoku and Mothae kimberlites are located |  | | Journal (issue) | | through microscopic examination as well as EDXRF and LA-ICP-MS analyses. 148 pg. 143 Coloring of Topaz...Shigley Carlsbad, California Emmanuel Fritsch Nantes, France Robert E. Kane Helena, Montana Christopher...ablation–inductively coupled plasma–mass spectrometry (LA-ICPMS) with an HP4500 spectrometer. The CETAC SLX200...Electron-microprobe analyses are summarized in table 1, and LA-ICP-MS analyses are provided in table 2; additional...composition of three Byrud emeralds, obtained by LA-ICP-MS.a Element (ppm) Li Mg K Sc Ti V Cr Mn Fe Ni |  | | Journal (issue) | | Matériaux Jean Rouxel, University of Nantes, France Rui Galopim de Carvalho Labgem, Lisbon, Portugal Cecilia...for Petrographic and Geochemical Research, Nancy, France Dr. Lee Groat University of British Columbia, Vancouver...Switzerland John King GIA, New York Dr. Simon Lawson De Beers DTC Research Centre, Maidenhead, UK Gail Brett...Rondeau Centre National de la Recherche Scientifique, University of Nantes, France Dr. George Rossman California...Library and Information Center Mike Breeding Craig La Bahn * Anita Romaine Sabrina Brookfield Mei-Mei |  | Janoušek, V., Krenn, E., Finger, F., Míková, J., Frýda, J. (2007) Hyperpotassic granulites from Blanský les (Moldanubian Zone, Bohemian Massif) revisited. Journal of GEOsciences, 52 (1-2) 73-112 | Journal (article/letter/editorial) | | dominated by slightly perthitic K-feldspar and almandine–pyrope rich garnet, the latter variously retrogressed...standard for Hf isotopic determinations and U–Pb LA ICP-MS dating (Sláma et al. 2006). In his pioneering...garnet-bearing hyperpotassic granulites from the Plešovice quarry. He concluded that these rocks could be products...(Vrána 1989) are mainly found in the Plešovice quarry. Much of the information on the variability of...University of Geneva), 338 ± 1 Ma (LA ICP-MS, University of Bergen), 336 ± 1 Ma (LA ICP-MS, Memorial University |  | | Journal (article/letter/editorial) | | in the western part of the Hostı́m village and a quarry (‘‘Hergertův lom’’) near the Koneprusy village...146Nd=144Nd ¼ 0.7219. During the course of this study the La Jolla Nd standard yielded 143Nd=144Nd ¼ 0.511858...studied samples, exhibiting a predominance of almandine (Alm 55–90%) and also of the grossular (Grs 60–96%)...the source region. Similarly, the occurrence of almandine-rich garnet and kyanite also indicates HP metamorphic...relatively enriched in LREE (Fig. 2B). When plotted on the La=Sc vs Ti=Zr discrimination diagram (Bhatia and Crook |  | | Journal (issue) | | of Nantes, France Michael S. Krzemnicki Swiss Gemmological Institute SSEF, Basel Rui Galopim de Carvalho...University, Surrey Benjamin Rondeau University of Nantes, France Jeff W. Harris University of Glasgow George...(tnhan93@gmail.com) Université catholique de Louvain Louvain-la-Neuve, Belgium Aurélien Delaunay and Ugo...Ugo Hennebois Laboratoire Français de Gemmologie Paris, France 5 mm Figure 2: Each of the six arms constituting... Jean-Pierre Gauthier Centre de Recherches Gemmologiques Nantes, France References Gübelin, E.J. & Koivula |  | | Book | | Go Gu Dy Er F Gd Ga Ge GeOx Au OH In I IO3 Ir Fe La Pb Li Mg Mn Hg Mo MoOx Nd No. 787 3 41 233 60 221...(1989), 279. Acta Cryst. B32 (1976), 475. Agardite-(La), (Cu,Ca)gLa(As04)3(0H)g*31120, E Hex. Translucent...Ca)5Ali2(P04)8(0H)22*32H20, 0 Orth. Pearly colorless. Moculta quarry, Angaston (near), South Australia, Australia. H=... Am. Min. 53 (1968), 733. Allanite-(Ce), Ca(Ce,La)(Al, Fe)3(Si04)3(0H), Mon. Submetallic/pitchy/resinous...(1892), 522. Am. Min. 56 (1971), 447. Allanite-(La), (La, Ca)2(Al,Fe)3(Si04)3(0H), S Mon. Karelia (N), |  | Miller, Christine, Mundil, Roland, Thöni, Martin, Konzett, Jürgen (2005) Refining the timing of eclogite metamorphism: a geochemical, petrological, Sm-Nd and U-Pb case study from the Pohorje Mountains, Slovenia (Eastern Alps) Contributions to Mineralogy and Petrology, 150 (1) 70-84 doi:10.1007/s00410-005-0004-0 | Journal (article/letter/editorial) | | (Triton TI; n=8), respectively, was determined for the La Jolla (Nd) international standard during the period...phengite. Subhedral garnet consists essentially of almandine (44–52 mol%), pyrope (22–30 mol%) and grossular...budget of the garnet separates obtained by ID, a few LA-ICP-MS analyses were performed on garnet from eclogite...sample CM20/01 calculated with the DOMINO program of De Capitani (1994). The database is an updated version...metapelite 96T16PMT were calculated with DOMINO (De Capitani 1994) in the sodium-free CKFMASH system |  | | Journal (article/letter/editorial) | | U so” Pb Isotopic ratios a (%b) b 206Pb/23sU (la) 207Pb/235U (lo) 0.766 0.008 0.010 0.016 0.424...129 18 15 27 14 12 84 Apparent ages 206Pb/238U (la) + + f -, * i i + + f + 451 11 13 18 419 34 30...lenses at Parigi and elsewhere. Its locality is a quarry about 1 km northwest of Parigi as indicated by...of zoned garnets starting with cores rich in almandine component (70 mol%) and grading gradually into...Mg/Fe bulk compositions in the system almandine-pyrope. There, almandine is stable as the only garnet phase |  | | Journal (article/letter/editorial) | | Cl 0.12 (OH) 0.01 . Among the rare earth elements, La, Ce, and Nd are each present in concentrations of...data: garnet: Mn interdiffusion with spessartine– almandine couple—Chakraborty and Ganguly (1992); diopside:...fluorite, scheelite and zircon. In: Pagel, M., Barbin, V., Blanc, P., Ohnenstetter, D. (Eds.), Cathodoluminescence...garnets; experimental determination in spessartine– almandine diffusion couples, evaluation of effective binary...Acta Crystallogr., A 32, 751 – 767. Suitch, P.R., La Cout, J.L., Hewat, A., Young, R.A., 1985. The structural |  | | Journal (article/letter/editorial) | | xenolith-rich outcrops: Peguerinos (sample U152) and La Paramera (sample U145) (Fig. 1). A previous U–Pb...Central Iberian Zone El Escorial Iberian Variscan Belt La Paramera (U145) Xenolith-rich localities Messejana-Plasencia...Granulites U145 and U152 have been sampled from the La Paramera and Peguerinos outcrops, respectively. ...element garnet composition was determined at the Centro de Microscopía Electrónica “Luis Bru” (Complutense University...used: sillimanite for Al; albite for Si and Na; almandine for Fe and Mn; kaersutite for Mg; microcline for |  | Stirling, D., Duncan, A. M., Guest, J. E., Finch, A. A. (1999) Petrogenesis of plagioclase phenocrysts of Mount Etna, Sicily, with particular reference to the 1983 eruption: contribution from cathodoluminescence petrography. Mineralogical Magazine, 63 (2) 189-198 doi:10.1180/002646199548420 | Journal (article/letter/editorial) | | using the following standards: albite (for Na), almandine garnet (A1, Mg and Fe), orthoclase (K), wollastonite...activation by Ti4+and Cu2+ (Mariano, 1973), Ga3+ (De St. Jorre and Smith, 1988) and Eu2+ (Mariano and...areas with 70 ppm in the blue luminescent areas) and De St. Jorre and Smith (1988) considered Ga only to...1.27 Sr 3011.51 Y 0.72 Zr 4.04 Nb 0.99 Ba 354.37 La 12.11 Ce 17.90 Pb 6.48 Eu 1.16 2 0.86 0.29 2.48...Soc. It. Mineral Petr., 36, 751-73 (In Italian). De St Jorre, L. and Smith, D.G.W. (1988) Cathodoluminescent |  | | Journal (article/letter/editorial) | | ICP-AES spectrometry at SARM CRPG-CNRS of Nancy, France. F. Giacomini et al. / Lithos 82 (2005) 221–248...the same set of zircons were performed on the same LA-ICPMS system at CNR-Pavia, Italy. Thirty-seven elements...migmatitic gneiss (H143) were also analysed: they are almandine-rich (rim-core values: Alm68–73) and strongly...from the kyanite-bearing eclogite of the Pays de Leon (France) reported by Godard and Mabit (1998). Its...Posada–Asinara mylonitic belt and for the eclogites of Punta de li Tulchi. The major and trace element composition |  | Maino, Matteo, Dallagiovanna, Giorgio, Gaggero, Laura, Seno, Silvio, Tiepolo, Massimo (2012) U-Pb zircon geochronological and petrographic constraints on late to post-collisional Variscan magmatism and metamorphism in the Ligurian Alps, Italy. Geological Journal, 47 (6) 632-652 doi:10.1002/gj.2421 | Journal (article/letter/editorial) | | ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) dating of zircon from the Barbassiria Orthogneisses...ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) U–Pb zircon dating study to verify the eruption/...allanite occur as accessory phases. Chloritized almandine grains, distinct from Alpine grossular-andradite...earth element (REE) pattern (Table 1) shows moderate La/Yb fractionation (2.81–9.97). The negative Eu anomaly...U 8.34 V 11 W 514 Y 41.8 Zn 23 Zr 59.1 REE (ppm) La 11.5 Ce 28.7 Pr 3.36 Nd 12.9 Sm 4 Eu 0.11 Gd 4.86 |  | Knorsch, Manuel, Deditius, Artur P., Xia, Fang, Pearce, Mark A., Uvarova, Yulia (2020) The impact of hydrothermal mineral replacement reactions on the formation and alteration of carbonate-hosted polymetallic sulfide deposits: A case study of the Artemis prospect, Queensland, Australia. Ore Geology Reviews, 116. 103232 doi:10.1016/j.oregeorev.2019.103232 | Journal (article/letter/editorial) | | rocks such as Mg, Na, Zr, Al, Li, Cr, Ga, K, Be, Cs, La, Hf, Nb, Rb, Sc, Ta, and Ti and ore stage elements...endmember components are spessartine (38.8 %), almandine (38.5 %), grossular (19.6 %), pyrope (1.2 %),...three endmembers spessartine (118.0 cm3 mol-1), almandine (115.3 cm3 mol-1), and grossular (125.3 cm3 mol-1)...calcite-3 into galena. Latestage homogeneous almandine-spessartine garnet dominantly replaced pyrrhotite...Around the Hydrothermal Carbonate-Replacement Cinco de Mayo Zn-Ag Deposit, Mexico. Econ. Geol. 114, 375-396 |  | | Journal (article/letter/editorial) | | Planetary Science Letters 206 (2003) 237^251 Box 1 De¢nitions of acronyms and general information about...microprobebased U^Pb dating of accessory minerals [72,73]. LA-ICPMS U^Pb dating does not require an external calibration...fractionations. When compared to ion microprobes, LA-ICPMS dating consumes more sample and su¡ers from...laser ablation ICPMS (for technical aspects of the LA-ICPMS system used, see [87]). U and Pb concentrations...screening of garnet prior to mineral separation using LA-ICPMS will yield direct information on Sm^Nd and |  | | Journal (issue) | | Stefanos Karampelas Laboratoire Français de Gemmologie, Paris, France Alessandra Costanzo National University...USA Emmanuel Fritsch University of Nantes, France Rui Galopim de Carvalho Gem Education Consultant, Lisbon...Gérard Panczer Claude Bernard University Lyon 1, France Jeffrey E. Post Smithsonian Institution, Washington...Gemmes at https://gemmologiefrancophonie.com/index.php/la-revue-gemmes. Gemstone Supplier Conversations Guide...material consists of pyrope-spessartine (with minor almandine and grossular), and mainly comes from Embilipitiya |  | ZHAO, R., ZHANG, R. Y., LIOU, J. G., BOOTH, A. L., POPE, E. C., CHAMBERLAIN, C. P. (2007) Petrochemistry, oxygen isotopes and U-Pb SHRIMP geochronology of mafic?ultramafic bodies from the Sulu UHP terrane, China. Journal of Metamorphic Geology, 25 (2) 207-224 doi:10.1111/j.1525-1314.2007.00691.x | Journal (article/letter/editorial) | | 0.23 0.10 Na2O K2 O 0.01 Trace elements (in ppm) La 0.99 Ce 1.41 Pr 0.14 Nd 0.51 Sm 0.09 Eu <0.05 Gd...patterns with LREE enrichment and HREE depletion; (La/Yb)N ratios range from 5 to 12. One garnet-rich sample...pattern with slight HREE enrichment and the lowest (La/Yb)N ratio of 3. In a primitive mantle-normalized...enrichments with (La/Yb)N of 6 to 10. Eclogites exhibit high concentrations in Ba and La and negative anomalies...Macaokuang eclogite Garnet listed in the Table 3 is almandine-rich and contains considerable amounts of grossular |  | | Report (chapter) | | Domingo, Dominican Republic 6 Universidad de Puerto Rico, Recinto de Utuado, Utuado, Puerto Rico 7 Present...blocks in the group of mélange slices north of Loma de Catey in Figure 1b differs from those found in the...entirely restricted to the mélanges between Loma de Catey and the north coast (Fig. 1b). Sampling and...artefacts 31110 and 31111. It is, in general, almandine-dominant, but the spessartine component in the...sample 31111, and decreases towards the rim. The almandine component behaves antithetically. Compositions |  | | Journal (issue) | | Shigley Carlsbad, California Emmanuel Fritsch Nantes, France Robert E. Kane Helena, Montana Christopher...light sources and best lighting practices. Peter De Jong, manager of Operations at GIA Belgium, provided...2, pp. 8–12. Tavernier J. (1676) Les six voyages de Jean Baptiste Tavernier, Ecuyer Baron d’Aubonne qu’il...Persia, and the Indies]. Gervais Clouzier et Claude Barbin, Paris. Wade F. (1915) Color and its affect [sic]... FTIR EDXRF LA-ICP- Isotope MS analysis 1 matrix specimen — — — 1 (EMPA), 1 (LA-ICP-MS) — — |  | JANOUŠEK, VOJTĚCH, GERDES, AXEL, VRÁNA, STANISLAV, FINGER, FRITZ, ERBAN, VOJTĚCH, FRIEDL, GERTRUDE, BRAITHWAITE, COLIN J. R. (2006) Low-pressure Granulites of the Lišov Massif, Southern Bohemia: Viséan Metamorphism of Late Devonian Plutonic Arc Rocks. Journal of Petrology, 47 (4) 705-744 doi:10.1093/petrology/egi091 | Journal (article/letter/editorial) | | laser-ablation inductively coupled plasma mass spectrometry (LA–ICP–MS), in conjunction with optical cathodoluminescence...for Si, Al and K; albite and jadeite for Na; almandine for Fe; olivine for Mg; andradite for Ca; rhodonite...south of Lišov; Kotková, 1998b; Fig. 2). In the quarry near Rudolfov, alternating layers 01–2 m thick...is given by the results of repeat analyses of the La Jolla [143Nd/144Nd ¼ 0511858 20 (2s) n ¼ 74] and...garnet–orthopyroxene charnockite Li-5 (LF ch), disused quarry 2 km WSW of Lišov. Plane-polarized light. (f) |  | | Journal (article/letter/editorial) | | GONZÁLEZ DEL TÁNAGO Departamento de Petrología y Geoquímica, Faculdad de Ciencias Geológicas, Universidad...batholite comprend des plutons de type I aussi bien que de type S, avec des degrés de fractionnement variables...l’étude de l’évolution compositionnel du zircon, qui peut avoir un de deux aspects. Le zircon de type 1...plutons granodioritiques et monzonitiques. Le zircon de type 2 se présente en cristaux plus petits et plus...plus équidimensionnels, non zonés ou bien zonés de façon irrégulière, et généralement tardifs, en position |  | | Journal (issue) | | respectively. See 'Gemmological properties of Type la diamonds with an unusually high hydrogen content'...lines at about 415 and 478 nm, common in all Type la diamonds. Crowningshield (1969) reported a 4.28 ct...all H-rich diamonds examined in this study are Type la, that is they contain aggregated nitrogen (for a...appears that Woods and others reported at the 1987 De Beers Diamond Research Conference the discovery of...r e t t e , J,J.,1961. J . J . , 1 9 6 1 . Essai de classification classification des bandes bandes d'absorption |
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Barbin quarry, Nantes, Nantes, Loire-Atlantique, Pays de la Loire, France