 | Alva-Valdivia, Luis, Cyphers, Ann, De La Luz Rivas-Sánchez, Maria, Agarwal, Amar, Zurita-Noguera, Judith, Urrutia-Fucugauchi, Jaime (2017) Mineralogical and magnetic characterization of Olmec ilmenite multi-perforated artifacts and inferences on source provenance. European Journal of Mineralogy, 29 (5) 851-860 doi:10.1127/ejm/2017/0029-2654 | Journal (article/letter/editorial) | | Mineralogical and magnetic characterization of Olmec ilmenite multiperforated artifacts and inferences on source...non-local artifacts, made from iron–titanium (ilmenite) oxide mineral and iron-ores, found in large quantities...Early Preclassic trade. We study multi-perforated ilmenite artifacts and iron–titanium oxide ores from potential...relations between ilmenite and granulite host-rocks also suggest for the ilmenite in Olmec samples an...wt%) of Olmec ilmenite are additional evidence that the provenance of the Olmec ilmenite artifacts is |  | | Journal (article/letter/editorial) | | during Barrovian regional metamorphism, Connecticut Valley Synclinorium. Oliver M. Wolfe and Frank S. Spear...from the previously well-characterized Connecticut Valley Synclinorium in central Vermont. Raman shifts for...Tinkham, 2009; Spear, Thomas, & Hallett, 2014; Castro & Spear, 2016). Hollister (1969a,b) observed porphyroblasts...Raman inclusion barometry (Spear et al., 2014; Castro & Spear; 2016). These authors have proposed different...2006; Pattison & Tinkham, 2009; Spear et al., 2014; Castro & Spear, 2016). In most of these studies, evaluation |  | Villaseca, Carlos, Orejana, David, Belousova, Elena, Armstrong, Richard A., Pérez-Soba, Cecilia, Jeffries, Teresa E. (2011) U–Pb isotopic ages and Hf isotope composition of zircons in Variscan gabbros from central Spain: evidence of variable crustal contamination. Mineralogy and Petrology, 101 (3) 151-167 doi:10.1007/s00710-010-0142-6 | Journal (article/letter/editorial) | | of mantle-derived magmas (Ugidos and Recio 1993; Castro et al. 1999); and c) partial melting of mainly...accessories are apatite, titanite, ulvo-spinel, ilmenite, zircon, baddeleyite, baritine and sulphide minerals...grains or as lamellar crystals at the rim of large ilmenite crystals, similar to other gabbroic rocks (Naslund...crystals of lamellar aspect defining coronas around ilmenite (Fig. 3). Zircon rims are from a few μm to 10...commonly discontinuous along ilmenite grain boundaries (Fig. 3). The magmatic ilmenite is typically surrounded |  | | Journal (article/letter/editorial) | | volcano, Iceland Gregor Weber a,b,∗ , Jonathan M. Castro a a b Johannes Gutenberg-University, Institute...Earth Sciences, Rue des Maraîchers 13, Geneva, Switzerland a r t i c l e i n f o Article history: Received...may develop quickly and be exceedingly explosive (Castro and Dingwell, 2009). Clearly, geophysical signals...by magmatic processes beneath volcanoes (e.g., Castro et al., 2016), investigations of magmatic system....org/licenses/by-nc-nd/4.0/). G. Weber, J.M. Castro / Earth and Planetary Science Letters 466 (2017) |  | | Journal (article/letter/editorial) | | titanomagnetites show composite textures with exsolved ilmenite. The oxybarometry (Sauerzapf et al. 2008; Ghiorso...represent amphibole-biotite tonalites from Zlatno valley, T60, T-226 are dikes, all from the Tribeč Mts...magnetite (Fig. 2b) (MF-25; the cliff in Hoskora valley). Another sample with considerable bulk of Fe-Ti...of magnitude lower than that for magnetite vs. ilmenite series of Ishihara (1977) as recalculated by Hrouda...translates to the increased hematite content of ilmenite s. s. and decreased ulvöspinel in magnetite s |  | Castro de Machuca, B., Arancibia, G., Morata, D., Belmar, M., Previley, L., Pontoriero, S. (2008) P–T–t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic arc, Argentina: Implications for the assembly of the Western Gondwana margin. Gondwana Research, 13 (2) 216-226 doi:10.1016/j.gr.2007.05.005 | Journal (article/letter/editorial) | | the assembly of the Western Gondwana margin B. Castro de Machuca a,b,⁎, G. Arancibia c , D. Morata d...4265103. E-mail address: bcastro@unsj-cuim.edu.ar (B. Castro de Machuca). et al., 1986; Ramos, 1988; Astini...rights reserved. doi:10.1016/j.gr.2007.05.005 B. Castro de Machuca et al. / Gondwana Research 13 (2008)...zones occurred in this area (Murra and Baldo, 2001; Castro de Machuca et al., 2004, 2005). According to Murra...ultramafic rocks and younger granites and pegmatites (Castro de Machuca et al., 1996, and references therein) |  | Cambeses, Aitor, Molina, José F., Morales, Irene, Lázaro, Concepción, Moreno, Juan A., Montero, Pilar, Bea, Fernando (2021) Compositional Evolution of the Variscan Intra-Orogenic Extensional Magmatism in the Valencia del Ventoso Plutonic Complex, Ossa-Morena Zone (SW Iberia): A View from Amphibole Compositional Relationships. Minerals, 11 (4) 431 doi:10.3390/min11040431 | Journal (article/letter/editorial) | | © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed...vol.%), biotite (ca. 20 vol.%), and accessory ilmenite, titanite, zircon, and apatite (Figure 2A,B)....vol.%) and K-feldspar (<5 vol.%), and accessory ilmenite, magnetite, titanite, zircon, and apatite (Figure...an accessory mineral assemblage consisting of ilmenite, magnetite, titanite, zircon, and apatite. As...an accessory mineral assemblage consisting of ilmenite, magnetite, titanite, zircon, apatite, primary |  | | Journal (article/letter/editorial) | | (Fig. 2; Crespo-Blanc, 1989). Along the Guadiana Valley, from south to north (and top to bottom), we can...terrane; (a) Ferreira do Alentejo; (b) Guadiana Valley; (c) Aracena; and (SBa) Serpa-Brinches antiform...deformation and metamorphism (Bard, 1969; 1970; Castro et al., 1987; Fonseca, 1989). The original textures...direction, towards the central part of the belt (Castro et al., 1987). Metamorphic conditions range from...(Ca-plagioclase + (green)hornblende + diopside + ilmenite), to granulite facies metagabbros (Ca-plagioclase |  | Trigo-Rodríguez, Josep M., Llorca, Jordi, Weyrauch, Mona, Bischoff, Addi, Moyano-Cambero, Carles E., Keil, Klaus, Laubenstein, Matthias, Pack, Andreas, Madiedo, José María, Alonso-Azcárate, Jacinto, Riebe, My, Wieler, Rainer, Ott, Uli, Tapia, Mar, Mestres, Narcís (2014) The Ardón L6 ordinary chondrite: A long-hidden Spanish meteorite fall. Meteoritics & Planetary Science, 49 (8) 1475-1484 doi:10.1111/maps.12344 | Journal (article/letter/editorial) | | Earth Sciences, ETH Z€ urich, CH 8092 Zurich, Switzerland 11 University of West Hungary, Faculty of Natural...addition, some ilmenite and phosphate grains were also identified (Figs. 3c and 4c). One ilmenite grain has...the meteorite (metal: white); c) intergrowth of ilmenite (ilm), chromite (chr), and troilite (FeS) enclosed...0.1 0.3 0.09 0.02 0.02 0.06 0.1 Ilmenite 1 b.d. b.d. b.d. 0.25 4.2 b.d. 0.03 1.76 53.6...MnO 0.77 [0.74]; MgO 2.65 [1.99], and so does ilmenite as given by Snetsinger and Keil [1969]: FeO 38 |  | | Journal (article/letter/editorial) | | Pattison and Tinkham, 2009; Spear et al., 2014; Castro and Spear, 2016; Wolfe and Spear, 2018). In contrast...which garnet nucleated (e.g. Spear et al., 2014; Castro and Spear, CR 2016; Wolfe and Spear, 2018) conclude...Pattison et al. (2011), Spear et CR al. (2014), Castro and Spear (2016) and Wolfe and Spear (2018) to...samples examined for this study contain garnet with ilmenite inclusions in the core and rutile inclusions approximately...Spear, 2018) as indicating that the reaction of ilmenite to rutile has IP been crossed during the growth |  | | Journal (article/letter/editorial) | | mammoth. Sodium Chloride from Paricutin volcano, Ilmenite, pink Garnet var, Xalostocite, Apatite crystals...namely ilmenite. His extremely competent talk on this mineral was briefly as follows: Ilmenite—a hard...diagram also indicates graphically the reason that ilmenite is difficult to separate into its elements for...gem "Titania." Largest production of rutile and ilmenite in L'nited States is in Virginia. The Adirondack...Adirondack magnetite deposits contain considerable ilmenite. The sands of Trail Ridge, Florida, produce 2% heavy |  | | Journal (article/letter/editorial) | | occurs in early clinopyroxenes and amphiboles. Ilmenite is the dominant Fe–Ti oxide, as interstitial magmatic... The increase of Mn towards the margin of the ilmenite crystals indicates a gradual increase in oxygen...ferrohypersthene. The replacement of titanite by ilmenite and ilmenite lamellae in the amphiboles suggests subsequent...amphibole; hornblende; pargasite; actinolite; ilmenite; magnetite; gabbro 1. Introduction Amphiboles...(Figure 1c) and in the deeply-incised Chiganois River valley; scattered outcrops also occur in areas where the |  | | Journal (article/letter/editorial) | | the formation of Glass Mountain obsidians (Long Valley, CA) inferred through crystallization of sanidine...2016 Abstract The Glass Mountain obsidians (Long Valley, CA) are crystal poor (<8 vol%) and highly evolved...(sanidine + quartz + plagioclase + titanomagnetite + ilmenite + zircon + apatite + allanite + biotite), and...Crystallization · Superheating · Long Valley Introduction Long Valley, CA, a basin positioned on the western...evolution of the silicic system that lies beneath Long Valley. Extensive geologic mapping (Bailey 1989; Metz |  | | Journal (article/letter/editorial) | | with maficity as a consequence of the presence of ilmenite and Ca-rich plagioclase, respectively. The decrease...non-peritectic phases form a CE P solid framework (e.g. Castro et al., 2000; Gardien et al., 1995; Stevens et...wt% ilmenite to the original compositions to saturate the pre-anatectic assemblages with ilmenite. Consequently...mica TE D compositions are always buffered by ilmenite. CE P The water content of the rocks was also...lower crust (Clemens and Watkins, 2001; Yardley and Valley, 1997), though fluid-present melting is not an |  | | Journal (article/letter/editorial) | | Nature 2019 Abstract Numerous analyses of multiple ilmenite, titanomagnetite, sanidine, plagioclase, biotite...uncertainty, show that there is a single population of ilmenite and titanomagnetite in each of 20 samples and...and no more than two populations of ilmenite and/or titanomagnetite in the remaining four. A statistical...kV and 10 nA) constrains the minimum number of ilmenite (≥ 21) and titanomagnetite (≥ 56) analyses required... in equilibrium with both titanomagnetite and ilmenite, after mixing between less differentiated melt(s) |  | | Journal (article/letter/editorial) | | this phase is different to that of garnet and ilmenite and similar to the density of the melt. Consequently...processes include magma mixing or hybridization (e.g. Castro et al., 1999; Velasco-Tapia et al., 2013) and host-rock... of garnet over cordierite and of rutile over ilmenite with increasing pressure (Angiboust and 1994)...consequence of the coupled entrainment of garnet and ilmenite, the main Fe+Mg- and Ti-bearing phases in a partially...proportions between garnet ACCEPTED MANUSCRIPT and ilmenite are controlled by the Ti and Fe+Mg content of |  | | Journal (article/letter/editorial) | | Frost and Mahood (1987), Zorpi et al. (1989), Castro et al. (1991, 1990) and Neves and Vauchez (1995)...fine-grained matrix of plagioclase, clinopyroxene and ilmenite with traces of apatite and pyrite (Sylvester...host rock. A few enclaves were found in unpolished valley walls but we were unable to determine if they were... 3(d )] that a dynamical cause seems unlikely. Castro et al. (1990, 1991) attributed similar features...10 cm, crystallized from trapped granitic melt (Castro et al., 1990). Most TSI pillows are composite and |  | | Journal (article/letter/editorial) | | Montel and Vielzeuf, 1997; Spear et al., 1999; Castro et al., 1999; Poli and Schmidt, 2002; Garcı́a-Casco... 1993; Montel and Vielzeuf, 1999) and 1.5 GPa (Castro et al., 1999), 820ºC at 1.0 GPa (PatiñoDouce and...and Harris, 1998), 900ºC at 1.5 GPa (Castro et al., 1999). While some of these staurolite occurrences...(+ inclusions of albite, muscovite, quartz and ilmenite) at 0.1 GPa and 800ºC representing supersolidus...559 1.621 0.066 0.862 0.004 14.147 4.966 – Ilmenite – 1c 1r 49.32 0.54 6.1 42.8 0.39 0.64 n.d. |  | | Journal (article/letter/editorial) | | García-Arias & Luis Guillermo Corretgé & Antonio Castro Received: 26 March 2010 / Accepted: 9 June 2010...Geología, Universidad de Oviedo, Oviedo, Spain A. Castro Departamento de Geología, Universidad de Huelva...and K-feldspar, the latter up to 10 cm in size (Castro et al. 2000; Díez Montes 2007). This gneissic formation...as in the Sanabria region of the Iberian Massif (Castro et al. 2000, Díez Montes 2007), which makes it...textures. The gneiss sample (A79710) was used by Castro et al. (1999, 2000) in anhydrous experiments under |  | | Journal (article/letter/editorial) | | (1995) 149-167 ical accessory minerals are zircon, ilmenite, apatite, sphene, anatase, pyrite and arsenopyrite...arsenopyrite. The most abundant weathering products in the Castro Daire area are gibbsite, halloysite/kaolinite and...mineralogy The geology and mineralogy of the Alva, Castro Daire and Calde granites (Fig. 1) have been described...and sillimanite, and zircon, monazite, xenotime, ilmenite, pyrite, apatite, anatase, sphene and rutile as...crystals of zircon and monazite, occasionally ilmenite, small prisms of apatite, sphene, and sometimes |  | | Report (issue) | | (Guimaraes, 1957) pyrochlore, apatite, barite, ilmenite, magnetite, and limonite along with which are...they were originally disseminated (deSouza and Castro, 1968). There is good evidence of zoning, segregation...edge. Uranium investigations of the carbonatite (Castro, 1968) revealed reserves of 3,385 metric tons of...unusually low 0.35 percent TM^. However, according to Castro, the uraniferous pyrochlore is found only in certain...in which these minerals are common (deSouza and Castro, 1968). There appears to be distinct mineral zoning |  | | Journal (article/letter/editorial) | | the Alpine-Apenninic ophiolites (France-Italy-Switzerland-Austria) JACQUELINE DESMONS Centre de Recherches...grade roughly controlled by the distance to the Ticino thermal culmination. Both the development of very...Fe-carpholite; Fe-Na-amph = FeNa-amphibole; ilm = ilmenite; jd =jadeite; liz = lizardite; Na-amph = Na-amphibole;...c h Italian border (the Versoyen unit) into Switzerland (north of Visp, near Binn, Vals and south Avers)...also from those areas that are distant from the Ticino thermal high. Neo-Alpine ages have been interpreted |  | | Journal (article/letter/editorial) | | crystallization of plagioclase, grunerite, biotite and ilmenite. Granodiorite G2 is of hybrid origin. Most variation...1997), magma mixing (e.g., Frost and Mahood, 1987; Castro et al., 1991; Zorpi et al., 1991; Barbarin and...the host G1, suggesting a syn-plutonic origin (Castro et al., 1990). Locally, microgranular enclaves...K-feldspar, biotite, zircon, apatite, monazite and ilmenite (Table 1). Muscovite is present in most granitic...described by others (e.g., Barbarin and Didier, 1991; Castro et al., 1991, Stephens et al., 1991; Silva et al |  | | Journal (article/letter/editorial) | | Amelia County, anal., 796 ALIAS (L. J.), see DE CASTRO(A. HoYos), 353 Almandine, Tasmania, anal., opt...anal., opt., 1032 Aphrosiderite, New Mexico & Switzerland, anal., D.T.A., 404 Apophyllite, Antrim, 173...s u (PA Ho), 749 BATTEY (M. H.), The Wairarapa Valley meteorite, 73 - - & Moss (A. A.), Powellite, 158...Arthurite, 937 DAY (G.), see HARRISON (l~. K.), 517 DE CASTRO (A. Hoyos) & ALIAS (L. J.), Almeriite, 353 Delatorreite...anMcime+muscovite, 260 Ignimbrite, New Zealand, strain in, 237 Ilmenite, hrorth Wales, 1032; Pantellcria, X-ray, 86 Immiscibility |  | Puelles, P., Gil Ibarguchi, J.I., García de Madinabeitia, S., Sarrionandia, F., Carracedo-Sánchez, M., Fernández-Armas, S. (2019) Granulite-facies gneisses and meta-igneous xenoliths from the Campo de Calatrava volcanic field (Spain): Implications for the tectonics of the Variscan lower crust. Lithos, 342. 114-134 doi:10.1016/j.lithos.2019.05.031 | Journal (article/letter/editorial) | | granulites. Plagioclase (andesine), hypersthene, ilmenite, apatite and zircon RI make up the mineral assemblage...composed of plagioclase (92%), hypersthene (4%) and ilmenite (3%) with minor amounts of apatite and zircon...how the former includes the latter (Fig. 2g). Ilmenite and apatite appear as interstitial crystals in...pyroxene and plagioclase (Figs. 2b, c and g). While ilmenite attains a grain size of 1 mm, apatite occurs as...XMg value ranges between 0.69-0.82 (Table C). Ilmenite occurs disseminated through the matrix and contains |
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