 | Rosenthal, Anja, Yaxley, Gregory M., Crichton, Wilson A., Kovács, István J., Spandler, Carl, Hermann, Joerg, Sándorné, Judit K., Rose-Koga, Estelle, Pelleter, Anne-Aziliz (2018) Phase relations and melting of nominally ‘dry’ residual eclogites with variable CaO/Na2O from 3 to 5 GPa and 1250 to 1500 °C; implications for refertilisation of upwelling heterogeneous mantle. Lithos, 314. 506-519 doi:10.1016/j.lithos.2018.05.025 | Journal (article/letter/editorial) | | refertilisation of upwelling heterogeneous mantle Anja Rosenthal, Gregory M. Yaxley, Wilson A. Crichton, Istvan...23 May 2018 Please cite this article as: Anja Rosenthal, Gregory M. Yaxley, Wilson A. Crichton, Istvan...garnet, higher PT E Mg# and Ca-tschermaks, and lower jadeite components of clinopyroxene, and higher...Falloon, 1998, 2005; Hirschmann & Stolper, 1996; Rosenthal et al., 2014; Yaxley & Green, 1998), is the recycling...residues from sequential melt extraction (Res2, Rosenthal et al., 2014; Res3, this study) along essentially |  | | Journal (article/letter/editorial) | | densitydriven delamination and foundering of arc lower crust (Stracke, 2012; Jagoutz and Schmidt, 2013)... ACCEPTED MANUSCRIPT Delamination and sinking of arc lower crust is thought to be more efficient under elevated...Lambart et al., 2012; Bulatov ED et al., 2014; Rosenthal et al., 2014) over a pressure range between ~2...this may be an issue in experiments conducted at lower temperatures in H2O-bearing systems; see Skora and...garnet and clinopyroxene analyses, especially at the lower temperature range, were compromised by ablation |  | | Report (issue) | | Objects BY INGRID S. WEBER 22 Classic Garnets: Almandine BY GLORIA STAEBLER AND PAUL POHWAT 28 New England...various members). Of these fifteen species, six almandine, andradite, grossular, pyrope, spessartine, and...constitute the "pyralspite" group, named for pyrope, almandine, z and spessartine. Those with Ca + in the X-site...between pairs of end-members: pyrope and almandine or almandine and spessartine. The same occurs within...individual sample. So for example, the formula + for almandine is given as Fe� Alz(SiO4)3 , and the formula for |  | Beyer, C., Klemme, S., Grützner, T., Ireland, T.R., Magee, C.W., Frost, D.J. (2016) Fluorine partitioning between eclogitic garnet, clinopyroxene, and melt at upper mantle conditions. Chemical Geology, 437. 88-97 doi:10.1016/j.chemgeo.2016.05.032 | Journal (article/letter/editorial) | | Garnet partition coefficients are consistently lower with an average partition coefficient of DF = 0.016...(Beyer et al., 2012; Dalou et al., 2012, 2014; Rosenthal et al., 2015), minerals and aqueous fluids (Bernini...2012; Dalou et al., 2012; Hauri et al., 2006; Rosenthal et al., 2015). With respect to the high modal...40–45 mol% pyrope (Mg3Al2Si3O12), 22–24 mol% almandine (Fe3Al2Si3O12), and 32– 34 mol% grossular (Ca3Al2Si3O12)...0.012, F and Rosenthal et al. (2015) Dcpx/melt = 0.040 ± 0.007, and are slightly F lower than the D values |  | Beyer, Christopher, Rosenthal, Anja, Myhill, Robert, Crichton, Wilson A., Yu, Tony, Wang, Yanbin, Frost, Daniel J. (2018) An internally consistent pressure calibration of geobarometers applicable to the Earth’s upper mantle using in situ XRD. Geochimica et Cosmochimica Acta, 222. 421-435 doi:10.1016/j.gca.2017.10.031 | Journal (article/letter/editorial) | | using in situ XRD Christopher Beyer a,b,⇑, Anja Rosenthal c,d, Robert Myhill e, Wilson A. Crichton f, Tony...using established procedures (Green et al., 2010; Rosenthal et al., 2014). Ir was added as IrO2 to both GA20...diopside/pyrope; Mn, MnTiO3/rutile; Fe, Fe-metal/almandine; Cr, Cr-metal; Al, jadeite/pyrope; Ti, rutile;...consisting of pyrope (Mg3Al2Si3O12, 0.24–0.71 mol), almandine (Fe3Al2Si3O12, 0.05–0.32 mol), grossular (Ca3Al2Si3O12...1986; Spandler et al., 2008; Beyer et al., 2015; Rosenthal et al., 2015). With increasing pressure, the jadeite |  | | Journal (article/letter/editorial) | | lfzhang@pku.edu.cn (L. Zhang). lize from basalt under lower mantle conditions have been reported as an evidence...(Cuenca, Spain), magnesite (Oberdorf, Austria), dolomite (Oberdorf, Austria) and siderite (Iviqtut, Greenland)...gradient across a graphite-lined, 2.5 mm capsule is lower than 25 °C within the sample length (<2 mm). Both...show slight increase of pyrope and decrease of almandine from core to rim in A300-9 (Fig. 3a), and slight...of grossular and decrease of almandine in A300-14 (Fig. 3b). The almandine and spessartine show slight |  | | | | centre. It constitutes approximately half of Canada’s land surface and boasts one of the most productive mining...layer of sediments produced fertile agricultural land. Unfortunately, much of this is now covered by urban...Township, Cochrane District, Ontario; Darwin Mine, McMurray Township, Algoma District, Ontario; nuggets...(48728): Dendritic, or Treetice. habit PD SE ES Yale District, British Columbia. Width of specimen: 5 cm Similar...Kamloops District, British Columbia; Burwash Creek, Yukon Territory; Coppercorp Mine, Algoma District, Ontario; |  | Farla, R., Rosenthal, A., Bollinger, C., Petitgirard, S., Guignard, J., Miyajima, N., Kawazoe, T., Crichton, W.A., Frost, D.J. (2017) High-pressure, high-temperature deformation of dunite, eclogite, clinopyroxenite and garnetite using in situ X-ray diffraction. Earth and Planetary Science Letters, 473. 291-302 doi:10.1016/j.epsl.2017.06.019 | Journal (article/letter/editorial) | | using in situ X-ray diffraction R. Farla a,∗ , A. Rosenthal a,b,c , C. Bollinger a , S. Petitgirard a , J...established in previous studies (Spandler et al., 2008; Rosenthal et al., 2014), subducted slabs may suffer suspension...partitioning in the rock samples. The model presented by Rosenthal et al. (2014) assumes the preservation of intrinsic...deformed the rock samples by moving the upper and lower anvils independently at constant displacement rate...individual experiments using established procedures (Rosenthal et al., 2014), and image analysis procedures are |  | | Journal (issue) | | is often confused with almandine. T h e true pyrope when compared with almandine, is seen to be quite a...really resemble the more subdued crimson or purple almandine. Other collectors have told me that they had some...pure pyrope should have a R . I . of 1*74, and almandine u p to possibly 1*82 a stone giving a reading...mineral, and since the absorption spectrum of almandine is so strong and the spectroscopic test so delicate...spessartites, which may contain sufficient of the almandine molecule to mask its own spectrum completely. |  | Schroeder-Frerkes, F., Woodland, A. B., Uenver-Thiele, L., Klimm, K., Knapp, N. (2016) Ca-Eskola incorporation in clinopyroxene: limitations and petrological implications for eclogites and related rocks. Contributions to Mineralogy and Petrology, 171 (12) doi:10.1007/s00410-016-1311-3 | Journal (article/letter/editorial) | | temperature conditions. Even small amounts of H2O lower the solidus temperature and the presence of a melt...observable impedance contrast. More recently, Rosenthal et al. (2014) consider the progressive exsolution...(2008), Knapp et al. (2013, 2015), as well as Rosenthal et al. (2015), it is clear that bulk composition...the extent of melt production, particularly at lower pressures. Experimental and analytical methods...range pertinent for the eclogite-melting model of Rosenthal et al. (2015) where subducting slabs begin to |  | | Journal (issue) | | SEPTEMBER–OCTOBER 2019 Articles The Golconda District, Minas Gerais, Brazil ..........................field-collected at many localities in the U.S., Germany, Austria, Switzerland, France, Italy, Great Britain, Hungary...historian, was born in Bad Vöslau, Niederösterreich, Austria, on December 12, 1944. He attended the Technical...Mineralogical Record were a major article on the Oberdorf, Austria, strontianite locality (with Tom Moore) in the...volume 50, September–October, 2019 The Golconda District Minas Gerais, Brazil Carlos Cornejo1 Andrea Bartorelli2 |  | | Book | | temperatures above 950°C. At shallower depths, under lower pressures and temperatures, pure carbon remains...in 1871 that diamonds began being mined from ‘dry land’ when the kimberlite pipes of South Africa were...formed as the Earth grew. They also suggest the lower mantle beneath is largely peridotite although some...waste rubble from a diamond mine in the Mbuji-Mayi district of the Democratic Republic of Congo. Four years...was plucked from river gravel diggings in the district of Mbuji-Mayi in the Democratic Republic of Congo |  | | Journal (issue) | | Branch: M. P. Gayton, F.G.A. South Yorkshire & District Branch: M. W. Eldridge, M.B., Ch.B., F.G.A. Examiners:...'Quartz . . . the name first appeared in the mining district of Bohemia in the 14th century, and appears to...three main absorption bands characteristic of almandine, i.e., positioned at 5050, 5270 and 5760À, and...whole series of garnets exists from pyrope to almandine. The garnets lying in the middle of this series...i.e., which can neither be termed pyrope nor almandine but which are intermediate between these two, |  | Németh, B., Török, K., Kovács, I., Szabó, Cs., Abart, R., Dégi, J., Mihály, J., Németh, Cs. (2015) Melting, fluid migration and fluid-rock interactions in the lower crust beneath the Bakony-Balaton Highland volcanic field: a silicate melt and fluid inclusion study. Mineralogy and Petrology, 109 (2) 217-234 doi:10.1007/s00710-015-0366-6 | Journal (article/letter/editorial) | | fluid migration and fluid-rock interactions in the lower crust beneath the Bakony-Balaton Highland volcanic...(BBHVF) to trace fluid-melt-rock interactions in the lower crust. Two unique mafic garnet granulite samples...278±83 ppm wt. %. These results imply a very dry lower crust, locally hydrated by percolating fluids and...Volcanic Field (BBHVF), garnet clinopyroxenite and lower crustal mafic garnet granulites and metapelite xenoliths...systematic paleo-thermobarometry by Dégi (2009) lower crustal mafic garnet granulite xenoliths represent |  | | Journal (article/letter/editorial) | | phases (e.g., dense hydrous magnesium silicates) at lower temperatures. Any ‘excess’ water in the mantle leads...TiO2, and K2O, was used in Dvir et al. (2011) at lower temperatures. This peridotite composition is based...peridotitic assemblage at 1200 °C. The hydrous phase at lower temperatures in K-free compositions is chlorite...affected as indicated by elevated CaO (especially at lower temperatures of 850–900 °C). Intergrowth of orthopyroxene...increase in pyrope component, while the grossular/almandine ratio decreases with increasing pressure. Across |  | Bataleva, Y.V., Palyanov, Y.N., Sokol, A.G., Borzdov, Y.M., Palyanova, G.A. (2012) Conditions for the origin of oxidized carbonate-silicate melts: Implications for mantle metasomatism and diamond formation. Lithos, 128. 113-125 doi:10.1016/j.lithos.2011.10.010 | Journal (article/letter/editorial) | | coexisting with Fe3 +-bearing ilmenite, pyrope-almandine and rutile, contained up to 13 wt.% of Fe2O3....carbonate–silicate melt was formed in association with pyrope-almandine and Fe3 +-bearing rutile. It was experimentally...°C).D — diamond seed crystals; Prp-Alm — pyrope-almandine; OPx — orthopyroxene; FeMs — Fe-magnesite; Ru...Ru — rutile; Ilm — ilmenite; Alm — almandine; L — CO2-rich Fe3 +-containing carbonate–silicate melt. using...ampoule: a — polycrystalline aggregate of pyrope-almandine, Fe-magnesite and rutile, penetrated with quenched |  | | Journal (article/letter/editorial) | | higher #Mg than CLZ5 (0.91 vs. 0.88) and slightly lower CaO wt% (on an anhydrous-basis). 2.2. Experimental...temperature in any given pressure. However, the almandine component decreases while the pyrope component...temperature range and in Dvir et al. (2011) at lower temperatures. Magnesite crystals are subhedral,...pressures. CLZ5 peridotites are characterized by lower abundance of cpx, with only 4-7% at subsolidus conditions...1). Increasing amounts of alkalis were found to lower the solidus temperature by a few tens of degrees |  | | Journal (article/letter/editorial) | | differ from peridotitic melts only in terms of lower Na2O and higher CaO contents. We model the partial...residual pyroxenites (e.g., Yaxley and Green 1998; Rosenthal et al. 2014). On this basis, recent models of...investigated at 1 and 1.5 GPa, GV10 has higher CaO and lower Na2O contents with Pyroxenites: 22 Peridotites:...(Table 1; Fig. 1), and higher Al2O3 and slightly lower SiO2 than clinopyroxenites studied by Kogiso and...Sobolev et al. (2007), for much higher CaO and lower S iO2 and N a2O contents (Fig. 1). Such difference |  | | Catalog/List | | opalescence ............. Fl. ALBITE PERlCLrNE Italy, Austria, Switzerland Alpine areas. Fine large white twin...choice display specimens ... New Jersey Paterson, Lower New Street quarry. White trapezohedral crystals...Lead sulfate. Arizona Cochise County, Swisshelm district. Rich gray-to-tan replacement of galena with nodular...4 5 7.50 l.·. . 50 .7 5 50 BER YL EM ERALD Austria or Russia Bright green single hexagonal crystal...3.50 5 . 00 1 . 50 BISMUTH Native bismuth. Austria, Bohemia, Germany. Gray metallic in matrix, rare |  | | Journal (volume) | | these deliciously sensual images for our finest Rosenthal porcelain in 18 colors plus 24kt gold on ri...minerals so that when he finally leh his no1Ive land and began his global rrovels, his first enterprises...carbuncle, of course, was a red garnet, probably an almandine. Today that sum is a great price to pay for a...as pyrope and the crimson violet-red known as almandine or carbunc le, were highly favored. faceted or...the rarest and most beautiful, is the softest; almandine, one of the most plentiful, is the hard In his |  | Marquardt, Katharina, De Graef, Marc, Singh, Saransh, Marquardt, Hauke, Rosenthal, Anja, Koizuimi, Sanae (2017) Quantitative electron backscatter diffraction (EBSD) data analyses using the dictionary indexing (DI) approach: Overcoming indexing difficulties on geological materials. American Mineralogist, 102 (9) 1843-1855 doi:10.2138/am-2017-6062 | Journal (article/letter/editorial) | | a nominally “dry” residual eclogite Res2_16 (Rosenthal et al. 2014) contains a melt phase that cannot...up to ~30–40 μm, and a melt fraction (Res2_16; Rosenthal et al. 2014). This sample represents a residue...solution of mainly pyrope (Mg3Al2Si3O12; 52.6 mol%), almandine (Fe3Al2Si3O12; 29.6 mol%), and grossular (Ca3Al2Si3O12;...Experimental and analytical procedures are outlined in Rosenthal et al. (2014). Sample 2. The forsterite sample...on the Band Contrast map, where band contrast is lower in an amorphous region; band-free patterns can be |  | | Journal (article/letter/editorial) | | biotite (K), olivine (Mg, Si, Fe), rutile (Ti), almandine (Si, Al), plagioclase (Si, Ca, Al), and rhodo-...melt. However, the former experiments contained lower melt fractions relative to the latter at a given...pyrope-rich (65–75%), with variable proportion of almandine (15–17%) and grossular 148 M. Lara, R. Dasgupta...the true solidus for our experiments is 50 °C lower than what we infer, it would still be distinctly...allowing for the onset of major melting to occur at lower 150 M. Lara, R. Dasgupta / Geochimica et Cosmochimica |  | | Book | | lt constitutes approxi1nately half of Canada's land surface and boasts one of the n1ost productive 1nining...of sedin1ents ,,,. produced fertile agricultural land. Unfortunate]y, much of this is no,v covered by...McIntyre Mine, Timmins, Tisdale Tp., Cochrane District, Ontario. Width of specimen: 10 cm Pyrite (fool's...Ontario; Darwin Mine, McMUJTay Township, Algon1a District, Onta1io; nuggets occur in placer deposits in...tree-like, habit. Afton Mines, Kam/oops Division, Yale District, British Columbia. Width of specimen: 5 cm Similar |  | Yaxley, Gregory M., Berry, Andrew J., Kamenetsky, Vadim S., Woodland, Alan B., Golovin, Alexander V. (2012) An oxygen fugacity profile through the Siberian Craton — Fe K-edge XANES determinations of Fe3+/∑Fe in garnets in peridotite xenoliths from the Udachnaya East kimberlite. Lithos, 140. 142-151 doi:10.1016/j.lithos.2012.01.016 | Journal (article/letter/editorial) | | sampled pressure interval. An overall trend to lower ΔlogƒO2[FMQ] values with increasing pressure was...from Udachnaya to have olivines with Mg#s at the lower end of the Mg# range. Overall, the olivine compositions...this sample. This is also consistent with its much lower P-T estimates from thermobarometry (1.2 GPa, 723...the sheared xenoliths to have garnet Mg#s at the lower end of the range. Garnet Fe 3 +/∑Fe determined by...continuously from 3.10 to 7.06 GPa. The lower temperature and lower pressure group of samples (except Uv101/03) |  | | Journal (article/letter/editorial) | | experiments with [20% melting). In experiments with lower melt fractions (EP15, EP20 and EP22) the glass pools...feldspar, albeit with higher K/(K ? Na) of *0.55 and lower CaO contents (*0.7 wt%) due to the presence of jadeite-rich...Garnet In general, the experimental garnets are almandine- and pyrope-rich, with low TiO2 (\0.9 wt%) and...there is a rapid progression to pyrope-rich and almandine- and grossular-poor compositions with increasing...3.0 GPa and low melt fractions is relatively almandine poor and grossular and pyrope rich due to the |
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