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Journal articles on the topic 'High-Al titanite'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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1

Gros, Katarzyna, Ewa Słaby, Łukasz Birski, Gabriela Kozub-Budzyń, and Jiří Sláma. "Geochemical evolution of a composite pluton: insight from major and trace element chemistry of titanite." Mineralogy and Petrology 114, no. 5 (2020): 375–401. http://dx.doi.org/10.1007/s00710-020-00715-x.

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Abstract Titanite from various rocks of the Karkonosze granitoid pluton (South-Eastern Poland) was studied, in order to evaluate its precision in recording magma evolution processes. The rocks are of lamprophyric, dioritic, granodioritic and granitic composition, including hybrid structures such as microgranular magmatic enclaves and composite dykes. Based on textures, chemistry and Zr-in-titanite geothermometry, titanites can be divided into magmatic and post-magmatic populations. Late- to post-magmatic titanite is present in almost all rock types, especially in the most evolved ones (where m

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2

Gu, Jialu, Bo Xu, Shu Li, and Yi Zhao. "Titanite Spectroscopy and In Situ LA-ICP-MS U–Pb Geochronology of Mogok, Myanmar." Crystals 12, no. 8 (2022): 1050. http://dx.doi.org/10.3390/cryst12081050.

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With the development of mineral testing technology and ore deposit geochemistry, titanite has become a hot topic in the study of accessory minerals. Two large-grained titanite crystals from Mogok, Myanmar, were used for a detailed study. In this study, the standard gemmological properties and spectral characteristics of titanite crystals were obtained by Fourier transform in-frared, micro ultraviolet-visible-near-infrared and Raman spectroscopy, respectively, which pro-vide a full set of data. Mineral major and trace elements were analysed using Electron-Probe Mi-croAnalysis (EPMA) and Laser A

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3

Yuan, Yu, Zhuang Miao, Yi Zhao, Bo Xu, Jialu Gu, and Pengyu Yuan. "Gemological and Chemical Characterization of Gem-Quality Titanite from Morocco." Crystals 14, no. 1 (2024): 80. http://dx.doi.org/10.3390/cryst14010080.

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Titanite is a widespread accessory mineral in igneous, metamorphic, and hydrothermal rocks, but few comply with gem-grade requirements. Previous studies on Moroccan titanite focused on elementary composition and U-Pb dating. In this study, two gem-grade titanites (MA-1 and MA-2) from the Moroccan Central High Atlas were investigated through gemological and chemical studies, including infrared spectrum, Raman spectrum, SEM-EDS, and LA-ICP-MS. Two titanite samples are yellow, transparent–translucent with a greasy luster, 3.5 and 2.5 mm long. MA-1 and MA-2 have similar gemological properties, the

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4

Kowallis, Bart J., Eric H. Christiansen, Michael J. Dorais, et al. "Variation of Fe, Al, and F Substitution in Titanite (Sphene)." Geosciences 12, no. 6 (2022): 229. http://dx.doi.org/10.3390/geosciences12060229.

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Titanite is an important mineral in petrochronology studies. Understanding chemical signatures of titanite from different environments can provide significant data in unraveling the complex histories recorded in their textures and compositions. Using a database of over 8500 titanite analyses from both the literature (3829) and our own data (4900), we found that the ratio of Fe/Al is useful for separating igneous titanite (Fe/Al is typically close to 1:1 and almost always > 1:2) from metamorphic titanite (Fe/Al ratio is < 1:2) with few exceptions. Volcanic titanite grains can also be sepa

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5

Carswell, D. A., R. N. Wilson, and M. Zhai. "Ultra-high pressure aluminous titanites in carbonate-bearing eclogites at Shuanghe in Dabieshan, central China." Mineralogical Magazine 60, no. 400 (1996): 461–71. http://dx.doi.org/10.1180/minmag.1996.060.400.07.

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AbstractPetrographic features and compositions of titanites in eclogites within the ultra-high pressure metamorphic terrane in central Dabieshan are documented and phase equilibria and thermobarometric implications discussed. Carbonate-bearing eclogite pods in marble at Shuanghe contain primary metamorphic aluminous titanites, with up to 39 mol.% Ca(Al,Fe3+)FSiO4 component. These titanites formed as part of a coesite-bearing eclogite assemblage and thus provide the first direct petrographic evidence that AlFTi−1O−1 substitution extends the stability of titanite, relative to rutile plus carbona

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6

Ivashchenko, V. I. "Variations in chemical compositions of titanite group minerals from ore skarnes in the Ladoga Lake Region (South Karelia, Russia)." Zapiski Vserossijskogo mineralogičeskogo obŝestva CLIII, no. 3 (2024): 76–96. https://doi.org/10.31857/s0869605524030053.

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Titanite, aluminium- and fluorine-enriched titanite, tin-bearing titanite and malayaite from ore skarns in the Ladoga Lake region were studied. Composition of these minerals from skarns with W-Zn-Pb-Bi (Latvasyrja, Jokiranta) and Sn-Zn-Cu-Fe-In (Pitkäranta Mining District) mineralization, related genetically to S-type and А-type granites, was analyzed. For the first time for ore deposits and occurrences in Karelia, there was detected titanite enriched in aluminum (Al2O3 5—7 wt%) and fluorine (~3 %). Isomorphic substitutions in titanite from skarns with different metallogenic specialization wer

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7

Uher, Pavel, Igor Broska, Ewa Krzemińska, Martin Ondrejka, Tomáš Mikuš, and Tomáš Vaculovič. "Titanite composition and SHRIMP U–Pb dating as indicators of post-magmatic tectono-thermal activity: Variscan I-type tonalites to granodiorites, the Western Carpathians." Geologica Carpathica 70, no. 6 (2019): 449–70. http://dx.doi.org/10.2478/geoca-2019-0026.

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Abstract Titanite belongs to the common accessory minerals in Variscan (~360–350 Ma) metaluminous to slightly peraluminous tonalites to granodiorites of I-type affinity in the Tatric and Veporic Units, the Western Carpathians, Slovakia. It forms brown tabular prismatic-dipyramidal crystals (~0.5 to 10 mm in size) in association with quartz, plagioclase, and biotite. Titanite crystals commonly shows oscillatory, sector and convolute irregular zonal textures, reflecting mainly variations in Ca and Ti versus Al (1–2 wt. % Al2O3, 0.04–0.08 Al apfu), Fe (0.6–1.6 wt. % Fe2O3, 0.02–0.04 Fe apfu), REE

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8

Kryvdik, S. G., and O. V. Dubyna. "Na-Enriched Titanite in Apoquartzite Fenites From Azov Area (Ukraine)." Mineralogical Journal 46, no. 3 (2024): 47–54. http://dx.doi.org/10.15407/mineraljournal.46.03.047.

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The Na-enriched titanite (up to 3.53 % Na2O) was found in the apoquartzite fenites of the Tunikova gully (Eastern part of the Azov megablock, Ukrainian Shield). It is observed in association with alkaline amphiboles, aegirine, low-Al and high-F phlogopites, rutile, bastnaesite-(Ce), monazite-(Ce), albite, and Ba-enriched potassium feldspar. This mineral association, as well as the agpaitic specificity of apoquartzite fenites (peralkaline index >2), is the result of the influence of undiscovered intrusion of alkaline igneous rocks (silicate or carbonatite) that were the source of alkaline fl

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9

Georgieva, Sylvina, Rossitsa Vassileva, Yulia Plotkina, et al. "Mineral chemistry and in-situ U-Pb geochronology of altered pegmatite from the vicinity of the Strashimir Pb-Zn vein deposit." Geologica Balcanica 52, no. 2 (2023): 29–51. http://dx.doi.org/10.52321/geolbalc.52.2.29.

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The current study presents new mineralogical, geochemical and geochronological data for a pegmatite body hosted in gneisses and marbles from the vicinity of the Strashimir Pb-Zn vein deposit, Madan ore district, South Bulgaria. The mineral composition of the studied pegmatite is represented by oligoclase–andesine (An10.1–33.2) and albite (An0–7.6), which prevail over K-feldspar (Or87.9–92.4), and quartz. The established accessory minerals are allanite-(Ce), titanite, apatite and zircon. The pegmatite/marble contact is affected by later hydrothermal silicate-carbonate alteration without detecte

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10

Pan, Yuanming, and Michael E. Fleet. "Vanadian allanite-(La) and Vanadian allanite-(Ce) from the Hemlo gold deposit, Ontario, Canada." Mineralogical Magazine 55, no. 381 (1991): 497–507. http://dx.doi.org/10.1180/minmag.1991.055.381.01.

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AbstractAllanite-(La) (containing up to 7.80 wt.% V2O3 and with La/ΣREE and La/Ce atomic ratios up to 0.54 and 1.45, respectively) and allanite-(Ce) (up to 8.46 wt.% V2O3) occur in close association with vanadian muscovite, barian tomichite and vanadian titanite in the main ore zone of the Hemlo gold deposit, Ontario, Canada. Allanite-(Ce) generally occurs as a minor constituent in cross-cutting veins or along foliation planes, whereas allanite-(La) invariably occurs in direct contact with titanite. The high V concentrations in the allanites from Hemlo are readily attributable to an adequate l

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11

Georgieva, Sylvina, Vassileva Rossitsa D., Yulia Plotkina, et al. "Mineral chemistry and in-situ U-Pb geochronology of altered pegmatite from the vicinity of the Strashimir Pb-Zn vein deposit." Geologica Balcanica 52, no. 2 (2023): 29–51. https://doi.org/10.52321/GeolBalc.52.2.29.

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The current study presents new mineralogical, geochemical and geochronological data for a pegmatite body hosted in gneisses and marbles from the vicinity of the Strashimir Pb-Zn vein deposit, Madan ore district, South Bulgaria. The mineral composition of the studied pegmatite is represented by oligoclase–andesine (An<sub>10.1–33.2</sub>) and albite (An<sub>0–7.6</sub>), which prevail over K-feldspar (Or<sub>87.9–92.4</sub>), and quartz. The established accessory minerals are allanite-(Ce), titanite, apatite and zircon. The pegmatite/marble contact is affected by later h

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12

Li, Mengmeng, Xue Gao, Guohui Gu, and Sheng Guan. "Magmatic–Hydrothermal Processes of the Pulang Giant Porphyry Cu (–Mo–Au) Deposit, Western Yunnan: A Perspective from Different Generations of Titanite." Minerals 15, no. 3 (2025): 263. https://doi.org/10.3390/min15030263.

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The Yidun island arc was formed in response to the Late Triassic westward subduction of the Ganzi–Litang oceanic plate, a branch of the Paleo-Tethys Ocean. The Zhongdian arc, located in the south of the Yidun island arc, has relatively large number of porphyry (skarn) type Cu–Mo ± Au polymetallic deposits, the largest of which is the Pulang Cu (–Mo–Au) deposit with proven Cu reserves of 5.11 Mt, Au reserves of 113 t, and 0.17 Mt of molybdenum. However, the relationship between mineralization and the potassic alteration zone, phyllic zone, and propylitic zone of the Pulang porphyry deposit is s

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13

Li, Zhen, Hao Wang, Qian Zhang, et al. "Ultra-High Pressure Metamorphism and Geochronology of Garnet Clinopyroxenite in the Paleozoic Dunhuang Orogenic Belt, Northwestern China." Minerals 11, no. 2 (2021): 117. http://dx.doi.org/10.3390/min11020117.

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Ultra-high pressure (UHP) metamorphism is recorded by garnet clinopyroxenite enclaves enclosed in an undeformed, unmetamorphosed granitic pluton, northeastern Paleozoic Dunhuang orogenic belt, northwestern China. The protoliths of the garnet clinopyroxenite might be basic or ultrabasic volcanic rocks. Three to four stages of metamorphic mineral assemblages have been found in the garnet clinopyroxenite, and clockwise metamorphic pressure–temperature (P-T) paths were retrieved, indicative of metamorphism in a subduction environment. Peak metamorphic P-T conditions (790–920 °C/28–41 kbar) of garn

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14

Markl, Gregor, and Sandra Piazolo. "Stability of high-Al titanite from low-pressure calcsilicates in light of fluid and host-rock composition." American Mineralogist 84, no. 1-2 (1999): 37–47. http://dx.doi.org/10.2138/am-1999-1-204.

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15

Macdonald, R., B. Bagiński, P. M. Kartashov, D. Zozulya, and P. Dzierżnowski. "Hydrothermal alteration of chevkinite-group minerals. Part 2. Metasomatite from the Keivy massif, Kola Peninsula, Russia." Mineralogical Magazine 79, no. 5 (2015): 1039–59. http://dx.doi.org/10.1180/minmag.2015.079.5.02.

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AbstractChevkinite-(Ce) in a mineralized quartz-epidote metasomatite from the Keivy massif, Kola Peninsula, Russia, underwent at least two stages of low-temperature alteration. In the first, it interacted with hydrothermal fluids, with loss of Ca, Fe, LREE and Si and strong enrichment in Ti. The altered chevkinite was then rimmed and partially replaced by a zone of ferriallanite-(Ce) and davidite-(La), in turn rimmed by a zone of allanite-(Ce) richer in the epidote component. The allanite zone was in turn partially replaced by rutile-titanite-quartz assemblages, the formation of titanite postd

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16

Peristeridou, Eftychia, Vasilios Melfos, Lambrini Papadopoulou, Nikolaos Kantiranis, and Panagiotis Voudouris. "Mineralogy and Mineral Chemistry of the REE-Rich Black Sands in Beaches of the Kavala District, Northern Greece." Geosciences 12, no. 7 (2022): 277. http://dx.doi.org/10.3390/geosciences12070277.

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The coastal area of the Kavala district, Northern Greece, is characterized by minerals enriched in rare earth elements (REE). The present study focuses on the mineralogy of the black sands from six different locations and the comprehensive mineral chemistry of the REE-bearing minerals, allanite-(Ce), epidote, monazite, thorite, zircon and titanite. Allanite-(Ce) is the most important carrier of light REE (LREE) in the studied black sands, reaching up to 23.24 wt % ΣREE. The crystal chemistry of allanite-(Ce) transitions into ferriallanite-(Ce), due to the significant involvement of Fe3+. High

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17

Zozulya, Dmitry, Kåre Kullerud, Erling Ravna, Yevgeny Savchenko, Ekaterina Selivanova, and Marina Timofeeva. "Mineralogical and Geochemical Constraints on Magma Evolution and Late-Stage Crystallization History of the Breivikbotn Silicocarbonatite, Seiland Igneous Province in Northern Norway: Prerequisites for Zeolite Deposits in Carbonatite Complexes." Minerals 8, no. 11 (2018): 537. http://dx.doi.org/10.3390/min8110537.

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The present work reports on new mineralogical and whole-rock geochemical data from the Breivikbotn silicocarbonatite (Seiland igneous province, North Norway), allowing conclusions to be drawn concerning its origin and the role of late fluid alteration. The rock shows a rare mineral association: calcite + pyroxene + amphibole + zeolite group minerals + garnet + titanite, with apatite, allanite, magnetite and zircon as minor and accessory minerals, and it is classified as silicocarbonatite. Calcite, titanite and pyroxene (Di36–46 Acm22–37 Hd14–21) are primarily magmatic minerals. Amphibole of ma

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18

Faryad, S. W., and G. Hoinkes. "Two contrasting mineral assemblages in the Meliata blueschists, Western Carpathians, Slovakia." Mineralogical Magazine 63, no. 4 (1999): 489–501. http://dx.doi.org/10.1180/002646199548664.

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AbstractLow-grade metamorphic rocks from the Meliata unit (Western Carpathians) are characterized by the presence of typical blueschist-facies minerals. In metabasalt, an early low-pressure assemblage (<0.5 GPa at 350°C characterized by muscovite and zoisite, is followed by high-pressure glaucophane, phengite, Na-pyroxene, chlorite, clinozoisite and Al-poor titanite, indicating pressures of >1.2 GPa at 450°C Na-pyroxene shows strong compositional variations between the end-members Jd4–70, Aeg10–49 and Q17–49, respectively. Phengite has high Si content of 3.5 a.p.f.u. The zoisite with Al2

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19

TROPPER, P. "The Substitution of Al and F in Titanite at High Pressure and Temperature: Experimental Constraints on Phase Relations and Solid Solution Properties." Journal of Petrology 43, no. 10 (2002): 1787–814. http://dx.doi.org/10.1093/petrology/43.10.1787.

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20

Ružička, Peter, Pavol Myšľan, and Tomáš Mikuš. "Minerálne zloženie kryštalických vápencov z lokality Dobšiná - Kruhová (Slovenská republika)." Bulletin Mineralogie Petrologie 29, no. 2 (2021): 285–96. http://dx.doi.org/10.46861/bmp.29.285.

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Crystalline limestones containing fragments of amphibolites from the locality Dobšiná - Kruhová are part of the Klátov complex (Northern Gemericum, Western Carpathians). The colour of studied rocks is light grey with massive texture and granoblastic structure. Inhomogeneous mottled to breccia-like character of a crystalline limestones is caused by the presence of amphiboles in the studied rocks. The identified mineral association of crystalline limestones consists of calcite, amphiboles (pargasite, magnesio-hornblende, actinolite), clinopyroxenes (diopside), albite and titanite. Chemical zonat

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21

Paoli, Dini, Petrelli, and Rocchi. "HFSE‐REE Transfer Mechanisms During Metasomatism of a Late Miocene Peraluminous Granite Intruding a Carbonate Host (Campiglia Marittima, Tuscany)." Minerals 9, no. 11 (2019): 682. http://dx.doi.org/10.3390/min9110682.

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The different generations of calc‐silicate assemblages formed during sequential metasomatic events make the Campiglia Marittima magmatic–hydrothermal system a prominent case study to investigate the mobility of rare earth element (REE) and other trace elements. These mineralogical assemblages also provide information about the nature and source of metasomatizing fluids. Petrographic and geochemical investigations of granite, endoskarn, and exoskarn bodies provide evidence for the contribution of metasomatizing fluids from an external source. The granitic pluton underwent intense metasomatism d

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22

Tang, Zhong, Zewei Pan, Tianxue Ming, et al. "Petrogenesis of Eocene A-Type Granite Associated with the Yingpanshan–Damanbie Regolith-Hosted Ion-Adsorption Rare Earth Element Deposit in the Tengchong Block, Southwest China." Minerals 14, no. 9 (2024): 933. http://dx.doi.org/10.3390/min14090933.

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The ion-adsorption-type rare earth element (iREE) deposits dominantly supply global resources of the heavy rare earth elements (HREEs), which have a critical role in a variety of advanced technological applications. The initial enrichment of REEs in the parent granites controls the formation of iREE deposits. Many Mesozoic and Cenozoic granites are associated with iREE mineralization in the Tengchong block, Southwest China. However, it is unclear how vital the mineralogical and geochemical characteristics of these granites are to the formation of iREE mineralization. We conducted geochronology

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23

Dolníček, Zdeněk, Petr Stöhr, Jana Ulmanová, and Luboš Vrtiška. "Kausticky metamorfovaný pískovcový xenolit a doprovodná hydrotermální mineralizace z neovulkanitů od Prackovic nad Labem (České středohoří)." Bulletin Mineralogie Petrologie 30, no. 1 (2022): 95–107. http://dx.doi.org/10.46861/bmp.30.095.

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Technical workings realized near Prackovice nad Labem (České středohoří Mts., Czech Republic) yielded new findings about rocks and mineral veins present in Cenozoic volcanites. The studied xenolith represents a piece of pyrometamorphosed and hydrothermally altered sandstone enclosed in an alkaline basic volcanic rock. The core of the xenolith contains relicts of clasts of quartz, embedded in a matrix composed of laths of quartz (probably pseudomorphs of quartz after tridymite) and symplectitic intergrowths of alkali feldspar (sanidine Or57-81Ab19-41An0-1) and quartz. This core is rimmed by dru

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Farhan, Ahmed O., Ahmed M. Ahmed, and Sabah S. Farhan. "Estimation of the Radioactive Elements in Raw Materials Utilized in the Ceramic Industry, Anbar, Western Iraq." Iraqi Geological Journal 55, no. 1B (2022): 113–20. http://dx.doi.org/10.46717/igj.55.1b.11ms-2022-02-27.

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In the present study, The High-Purity Germanium system was utilized to Radionuclide concentrations of 10 specimens of raw materials utilized in the ceramic manufacture from the ceramic plant in Anbar, western Iraq. The concentrations ranged between 15.035-31.410, 11.330-33.870, 85.380-272.320 Bq/kg of 238U, 232Th and 40K, respectively, with an aggregate rate of 23.523±4.121, 23.616±5.308, 176.084±58.848 Bq/kg, respectively. The radiological aspects Were discussed by computing the gamma radiance parameters. Consequently, the qualitative activity level and gamma radiance parameters are less than

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Chakhmouradian, A. R., and R. H. Mitchell. "Three compositional varieties of perovskite from kimberlites of the Lac de Gras field (Northwest Territories, Canada)." Mineralogical Magazine 65, no. 1 (2001): 133–48. http://dx.doi.org/10.1180/002646101550082.

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AbstractIn hypabyssal and crater-facies kimberlites of the Lac de Gras kimberlite field, perovskite occurs as reaction-induced rims on earlier-crystallized Ti-bearing minerals (magnesian ilmenite and priderite), inclusions in atoll spinels and discrete crystals in a serpentine-calcite mesostasis. The mineral is associated with spinels, apatite, monticellite, phlogopite, baryte, Fe-Ni sulphides, ilmenite, diopside and zircon. Uncommon accessory phases found in an assemblage with perovskite include titanite, monazite- (Ce), witherite, strontium-apatite, khibinskite, djerfisherite, wollastonite,

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Jensen, Michael, Bart Kowallis, Eric Christiansen, et al. "Fallout tuffs in the Eocene Duchesne River Formation, northeastern Utah—ages, compositions, and likely source." Geology of the Intermountain West 7 (March 18, 2020): 1–27. http://dx.doi.org/10.31711/giw.v7.pp1-27.

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Thin fallout tuffs are common in the terrestrial deposits of the Eocene Duchesne River Formation on the flanks of the Uinta Mountains of eastern Utah. Their ages and compositions provide new insight into the tectonic events and magmatic history of the western Cordillera and provide important constraints on the Cenozoic land mammal chronology. Whole-rock compositions of the volcanic ash show that they underwent post-emplacement argillic alteration, typical of a wetland/floodplain depositional setting. However, immobile element ratios and abundances, such as Zr/Ti, La/Nb, and Y are typical of rh

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Mavrogonatos, Constantinos, Panagiotis Voudouris, Jasper Berndt, et al. "Trace Elements in Magnetite from the Pagoni Rachi Porphyry Prospect, NE Greece: Implications for Ore Genesis and Exploration." Minerals 9, no. 12 (2019): 725. http://dx.doi.org/10.3390/min9120725.

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Magnetite is a common accessory phase in various types of ore deposits. Its trace element content has proven to have critical implications regarding petrogenesis and as guides in the exploration for ore deposits in general. In this study we use LA-ICP-MS (laser ablation-inductively coupled plasma-mass spectrometry) analyses of trace elements to chemically characterize magnetite from the Pagoni Rachi Cu–Mo–Re–Au porphyry-style prospect, Thrace, northern Greece. Igneous magnetite mostly occurs as euhedral grains, which are commonly replaced by hematite in fresh to propylitic-altered granodiorite

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Stepanyuk, L. M., T. I. Dovbush, V. M. Belskyi, O. B. Vysotsky, O. V. Bilan, and I. M. Kotvitska. "GEOCHRONOLOGY OF CRYSTALLINE ROCKS OF THE SHUMYLIV SECTION OF THE SOUTH BUG RIVER VALLEY (HAISYN BLOCK)." Mineralogical Journal 43, no. 3 (2021): 62–72. http://dx.doi.org/10.15407/mineraljournal.43.03.062.

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The Haisyn complex rocks (sobites (Shcherbakov, 2005)), consisting of diorite-like rocks and amphibolites, which biotite granites develop, is outcroping near the village of Shumyliv along the South Bug river and in an abandoned open pit mine (on South of Shumyliv). The rocks are characterized by high magnetization according to magnetic survey results. A linear magnetic anomaly extends in the north-east direction (NE 69º) with a distance of more than 35 km. Entin et al. (2019) proposed that this magnetic anomaly is caused by a dyke with a felsic or intermediate composition. The internal structu

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Xu, W., X. Liu, Q. Wang, J. Lin, and D. Wang. "Garnet exsolution in garnet clinopyroxenite and clinopyroxenite xenoliths in early Cretaceous intrusions from the Xuzhou region, eastern China." Mineralogical Magazine 68, no. 3 (2004): 443–53. http://dx.doi.org/10.1180/0026461046830198.

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AbstractExsolved garnet, sometimes associated with exsolved amphibole and zoisite, is abundant in aluminous clinopyroxene of garnet clinopyroxenite and clinopyroxenite xenoliths in the early Cretaceous dioriticmonzodioritic intrusions from the Xuzhou region, ∼100 km west of the Sulu ultrahigh-pressure (UHP) metamorphic terrane in eastern China. In addition to the mineral exsolutions, intergranular fine-grained garnet, zoisite, titanite, and sometimes amphibole are also present around the primary clinopyroxene grains. Clinopyroxene shows compositional gradients, with decreasing Al and increasin

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Stoll, Nicolas, Julien Westhoff, Pascal Bohleber, et al. "Chemical and visual characterisation of EGRIP glacial ice and cloudy bands within." Cryosphere 17, no. 5 (2023): 2021–43. http://dx.doi.org/10.5194/tc-17-2021-2023.

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Abstract. Impurities in polar ice play a critical role in ice flow, deformation, and the integrity of the ice core record. Especially cloudy bands, visible layers with high impurity concentrations, are prominent features in ice from glacial periods. Their physical and chemical properties are poorly understood, highlighting the need to analyse them in more detail. We bridge the gap between decimetre and micrometre scales by combining the visual stratigraphy line scanner, fabric analyser, microstructure mapping, Raman spectroscopy, and laser ablation inductively coupled plasma mass spectrometry

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Chayka, Ivan F., Vadim S. Kamenetsky, Liudmila M. Zhitova, et al. "Hybrid Nature of the Platinum Group Element Chromite-Rich Rocks of the Norilsk 1 Intrusion: Genetic Constraints from Cr Spinel and Spinel-Hosted Multiphase Inclusions." Economic Geology 115, no. 6 (2020): 1321–42. http://dx.doi.org/10.5382/econgeo.4745.

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Abstract The Norilsk 1 intrusion (Russia), renowned for its abundance of sulfide ores, contains an upper contact zone, which hosts sulfide-poor and Cr spinel and platinum group element (PGE)-rich discontinuous reefs with significant economic potential. Located within strongly inhomogeneous contact rocks of various compositions, the origin of these reefs is complex and debated. Enrichment in PGEs in these rocks is distributed heterogeneously, occasionally occurring in extremely dense disseminations of Cr spinel, which are unusual for other rocks of the Norilsk 1 intrusion. The compositions of C

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Ye, Zhenchao, Jingwen Mao, Cai Yang, Juan Usca, and Xinhao Li. "Trace Elements in Magnetite and Origin of the Mariela Iron Oxide-Apatite Deposit, Southern Peru." Minerals 13, no. 7 (2023): 934. http://dx.doi.org/10.3390/min13070934.

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To better understand the origin of the Andean iron oxide-apatite (IOA) deposits, we conducted a study on the geology and magnetite geochemistry of the Mariela IOA deposit in the Peruvian Iron Belt, central Andes. The Mariela deposit is hosted by gabbroic and dioritic intrusions. The major high-grade massive ores are primarily composed of magnetite and contain variable amounts of apatite and actinolite. Based on textural and geochemical characteristics, three different types of magnetite are recognized: Type I magnetite occurs in the massive magnetite ore, subclassified as inclusion-rich (I-a),

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Li, Ruihong, Ntwali Albert, Menghe Yun, Yinsheng Meng, and Hao Du. "Geological and Geochemical Characteristics of the Archean Basement-Hosted Gold Deposit in Pinglidian, Jiaodong Peninsula, Eastern China: Constraints on Auriferous Quartz-Vein Exploration." Minerals 9, no. 1 (2019): 62. http://dx.doi.org/10.3390/min9010062.

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The gold deposits that are hosted in the Archean metamorphic rock, have yet to be explored beyond Pinglidian gold deposit in the northwestern Jiaodong Peninsula, eastern China. This kind of gold deposit differs from those that are hosted in Mesozoic granitoids, showing good potential for the prospecting of auriferous quartz-vein gold deposits controlled by the structures in greenfield Archean metamorphic rock. Pinglidian gold deposit is located in the hanging wall of the Jiaojia fault and consists of eight separated orebodies that are enveloped by altered rock in Archean biotite plagiogneiss.

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Bačík, Peter, Pavel Uher, Petra Kozáková, Martin Števko, Daniel Ozdín, and Tomáš Vaculovič. "Vanadian and chromian garnet- and epidote-supergroup minerals in metamorphosed Paleozoic black shales from Čierna Lehota, Strážovské vrchy Mountains, Slovakia: crystal chemistry and evolution." Mineralogical Magazine 82, no. 4 (2018): 889–911. http://dx.doi.org/10.1180/minmag.2017.081.068.

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AbstractSilicate minerals enriched in V, Cr and Mn including garnets and epidote-supergroup members, in association with amphiboles, albite, hyalophane, titanite, chamosite, sulfides and other minerals occur in Devonian black shales near Čierna Lehota in the Strážovské vrchy Mountains, Slovakia. The garnets have high concentrations of V, Cr and Mn (up to 17 wt.% V2O3, ≤11 wt.% Cr2O3and ≤ 21 wt.% MnO) and several compositional types. Vanadian-chromian grossular (Grs 1) usually preserves primary metamorphic oscillatory zoning, whereas solid solutions between goldmanite (Gld 2A,B), V- and Cr-rich

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Dalton, Hayden, Andrea Giuliani, Hugh O’Brien, David Phillips, Janet Hergt, and Roland Maas. "Petrogenesis of a Hybrid Cluster of Evolved Kimberlites and Ultramafic Lamprophyres in the Kuusamo Area, Finland." Journal of Petrology 60, no. 10 (2019): 2025–50. http://dx.doi.org/10.1093/petrology/egz062.

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Abstract Kimberlites are often closely associated, both in time and space, with a wide variety of alkaline ultramafic rock types, yet the question of a genetic relationship between these rock types remains uncertain. One locality where these relationships can be studied within the same cluster is the Karelian craton in Finland. In this study we present the first petrographic, mineral and whole-rock geochemical results for the most recently discovered kimberlite cluster on this craton, which represents an example of the close spatial overlap of kimberlites with ultramafic lamprophyres. The Kuus

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Farah, Aboubaker, André Michard, Omar Saddiqi, et al. "The Beni Bousera marbles, record of a Triassic-Early Jurassic hyperextended margin in the Alpujarrides-Sebtides units (Rif belt, Morocco)." BSGF - Earth Sciences Bulletin 192 (2021): 26. http://dx.doi.org/10.1051/bsgf/2021015.

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The timing and process of exhumation of the subcontinental peridotites of the Gibraltar Arc (Ronda, Beni Bousera) have been discussed extensively over the last decades. In this work, we contribute to this debate through the first mapping, structural and petrological analyses, and SHRIMP U-Th-Pb dating of high-grade marbles that crop out around the Beni Bousera antiform of the Alpujarrides-Sebtides units of northern Rif (Morocco). These marbles, here termed the Beni Bousera marbles (BBMs), instead of being intercalations in the granulitic envelope (kinzigites) of the Beni Bousera peridotites, a

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Akhonin, S. V., V. O. Berezos, O. M. Pikulin, et al. "Producing high-temperature titanium alloys of Ti–Al–Zr–Si–Mo–Nb–Sn system by electron beam melting." Paton Welding Journal 2022, no. 7 (2022): 39–45. http://dx.doi.org/10.37434/tpwj2022.07.07.

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Plutenko, Tetiana, Oleg V'yunov, Oleksandr Fedorchuk, Oleg Yanchevskii, and Pavlo Torchyniuk. "Al-DOPED LANTHANUM-LITHIUM TITANATE WITH HIGH DIELECTRIC CONSTANT." Ukrainian Chemistry Journal 89, no. 6 (2023): 71–78. http://dx.doi.org/10.33609/2708-129x.89.06.2023.71-78.

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La0.67LixTi1-xAlxO3 ceramics (x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30) were synthesized with the use of Al2O3 and an aqueous solution of Al(NO3)3 as an aluminium source. In both cases, the ceramics preserve a high dielectric constant ε ~ 105. It was found that the single-phase La0.67LixTi1-xAlxO3 perovskite structure is formed at temperatures above 1200 C. It was shown that the use of Al(NO3)3 allows simplifying the synthesis: reduction in the sintering temperature by 20 C, Li loss and, as a result, an increase in the density of ceramics. Ceramics La0.67Li0.15Ti0.85Al0.15O3 with a maximum densi

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Afindi Zaman, Rosyaini, Mohamad Johari Abu, Mohd Fariz Ab Rahman, et al. "Dielectric Properties of Al₂O₃/CaCu₃Ti₄O₁₂ Composite at High Frequency Range." Materials Science Forum 888 (March 2017): 7–11. http://dx.doi.org/10.4028/www.scientific.net/msf.888.7.

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The dielectric properties of CCTO with addition Al2O3 prepared via solid state reaction investigated and reported at 1 GHz. With addition Al2O3 from 20 wt% to 80 wt%, secondary phase starts appear in XRD analysis such as copper dialuminium oxide (CuAl2O4), calcium titanate (CaTiO3) and titanium oxide (TiO2). These secondary phases show great influence on morphology and grain size of Al2O3/ CCTO composites. Hence, the addition of only 20 wt% Al2O3, the dielectric constant of CCTO reduce almost 50% and tangent loss is in between 0.0028 to 0.0630 which is very low and this characterization is sui

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Hu, Wenjie, Sergii Markovych, Kun Tan, Oleksandr Shorinov, and Tingting Cao. "RESEARCH ON WEAR RESISTANCE COATING OF AIRCRAFT TITANIUM ALLOY PARTS BY COLD SPRAYING TECHNOLOGY." Aerospace technic and technology, no. 6 (November 27, 2020): 61–71. http://dx.doi.org/10.32620/aktt.2020.6.07.

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Titanium alloys are the main structural material of aerospace system component, about 75 % of titanium and titanium alloys are used in the aerospace industry, which have the advantages of low density, high specific strength and excellent corrosion resistance, However, its low wear resistance limits the further application of titanium alloy. Therefore, it is of great significance to the surface protection of titanium alloy. Surface coating technology can solve the problems of titanium alloy wear. Currently, there are many coating technologies to solve the problems of wear and corrosion, includi

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Selin, R. V., V. Yu Bilous, S. B. Rukhanskyi, I. B. Selina, and L. M. Radchenko. "Influence of pre-heating on TIG-welding thermal cycle of high-temperature titanium alloy of TI‒AL‒ZR‒SN‒MO‒NB‒SI system." Paton Welding Journal 2024, no. 2 (2024): 8–13. http://dx.doi.org/10.37434/tpwj2024.02.02.

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Fang, Shuang, Min Cong Zhang, Qiu Ying Yu, and Hua Ping Xiong. "Study on Tensile Fracture Behavior of New Type High Temperature Titanium Alloy Ti-Al-Nb at Room Temperature." Key Engineering Materials 905 (January 4, 2022): 14–21. http://dx.doi.org/10.4028/www.scientific.net/kem.905.14.

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In this paper, in order to explore the development of a titanium-based superalloy with a working temperature of 700°C to 750°C and good ductility at room temperature, using Ti+Al+Ti2AlNb ternary powder as the raw material, the temperature is 1200°C to 1300°C, 30MPa, 1.5h Directly mixed and sintered under hot pressing conditions, a new type of titanium-based superalloy (TiAl+Ti2AlNb) samples were prepared. The fracture morphology of hot-pressed sintered samples and tensile samples used scanning electron microscope (Scanning electron microscope, referred to as SEM) and Electron backscattered dif

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Shen, Yu-Min, Guan-Bo Liao, Jyun-Siang Wang, and Jow-Lay Huang. "An in-Operando XRD Study of TiO₂ Based Anode Materials for Secondary Li Ion Batteries Application." ECS Meeting Abstracts MA2023-02, no. 8 (2023): 3385. http://dx.doi.org/10.1149/ma2023-0283385mtgabs.

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In recent years, lithium-ion batteries (LIB) have emerged as one of the most representative rechargeable energy-storage systems. Among the various anode materials used, titanium dioxide stands out for its excellent stability, superior safety, and high cycling performance. Moreover, its remarkable stability in high-capacity charge–discharge cycles is useful for developing fast-charging batteries. Therefore, this material has attracted significant attention from researchers. In this study, we investigate aluminum-doped and carbon-coated non-stoichiometric titanium dioxide for in operando X-ray d

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Ji, Shou Xun, Douglas Watson, Yun Wang, Mark White, and Zhong Yun Fan. "Effect of Ti Addition on Mechanical Properties of High Pressure Die Cast Al-Mg-Si Alloys." Materials Science Forum 765 (July 2013): 23–27. http://dx.doi.org/10.4028/www.scientific.net/msf.765.23.

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Titanium significantly improves the mechanical properties, especially the ductility of a diecast Al5Mg1.5Si0.6Mn alloy. When a titanium addition of 0.20 wt.% is made the elongation in the as-cast condition is increased from 11% to 18% and the yield strength is increased from 136 MPa to 157 MPa and the ultimate tensile strength from 296 MPa to 308 MPa. The improved mechanical performance can be attributed to the reduced tendency for hot tearing due to Ti addition.

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Jiang, Wei Hui, Quan Zhang, Jian Min Liu, Qing Xia Zhu, and Li Feng Miao. "Effect of Gelation Process on Preparation of Aluminum Titanate Ultrafine Powder by Hydrolytic Sol-Gel Method." Materials Science Forum 745-746 (February 2013): 690–95. http://dx.doi.org/10.4028/www.scientific.net/msf.745-746.690.

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Aluminium titanate (AT) ultrafine powder was prepared via hydrolytic sol-gel (HSG) method using aluminium nitrate (Al (NO3)3·9H2O) and titanium tetrachloride (TiCl4) as precursors as well as ethanol as solvent. Water required for hydrolysis reaction was supplied by the crystal water of aluminium nitrate itself. The effect of gelation processes, i.e. reflux and solvothermal treatment, on synthesis of AT powder was investigated by means of DTA-TG, XRD, SEM, and TEM, etc. The result shows that the gelation process has significant effect on the synthesis of AT powder. By reflux process, AT powder

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Dunyushkina, L. A., V. A. Gorbunov, A. A. Babkina, and N. O. Esina. "High-temperature electrical transport in Al-doped calcium and strontium titanates." Ionics 9, no. 1-2 (2003): 67–70. http://dx.doi.org/10.1007/bf02376539.

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Cheng, Hai-Long, Seul-Yi Lee, Na Chu, Se-Yeol Lee, Fan-Long Jin, and Soo-Jin Park. "Titanate-Coupled Aluminum as an Interfacial Modifier for Enhanced Thermal and Mechanical Performance in Hybrid Epoxy Composites." Polymers 17, no. 14 (2025): 1922. https://doi.org/10.3390/polym17141922.

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Thermally conductive polymer composites are essential for effective heat dissipation in electronic packaging, where both thermal management and mechanical reliability are critical. Although diglycidyl ether of bisphenol-A (DGEBA)-based epoxies exhibit favorable properties, their intrinsically low thermal conductivity limits broader applications. Incorporating conductive fillers, such as expanded graphite (EG) and metal powders, enhances heat transport but often compromises mechanical strength due to poor filler–matrix compatibility. In this study, we address this trade-off by employing a titan

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Zeng, Siqi, and Faguo Li. "Study on the Influence Law of Ce on Microstructure and High-Temperature Oxidation Resistance of Ti-Al-Si Composite Coating." Coatings 13, no. 7 (2023): 1244. http://dx.doi.org/10.3390/coatings13071244.

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High-temperature titanium alloys are widely used in aerospace hot parts; however, the thermal barrier temperature of 600 °C limits its service temperature. In this paper, a two-step hot-dip plating method is proposed to prepare the composite coating containing Ce on the surface of titanium alloy, which can make the oxidation resistance temperature of titanium alloy reach 800 °C The microstructure, phase composition, and element distribution of Ce-containing Ti-Al-Si hot-dip coating, Ce-containing Ti-Al-Si pre-oxidation coating and Ce-containing Ti-Al-Si high-temperature oxidation coating were

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Savkovs, Konstantins, Margarita Urbaha, and Viktors Feofanovs. "Determining High-Temperature Oxidation Resistance of (TI-Al-X-N) Based Coatings for Titanium Alloys." Solid State Phenomena 320 (June 30, 2021): 66–71. http://dx.doi.org/10.4028/www.scientific.net/ssp.320.66.

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Basic titanium alloys are successfully used in modern aviation GTE (gas turbine engine). They are used for parts of a compressor and partly in low pressure part of turbine (intermetallic Ti-Al alloys) due to their high specific strength and at the same time low density, high corrosion resistance but can be used only up to 700 °C. The paper deals with the results of heat resistance testing at 750 °C of Ti-Al-(X)+N based thin ion-plasm multilayers coatings, with different priority of monolayers- intermetallic, conglomerate or nitride for gas turbine engine (GTE) blades from titanium alloys. All

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Jongprateep, Oratai, Jednupong Palomas, and Tunchanoke Khongnakhon. "Enhancement of Dielectric Constants in Strontium Titanate through Mg and Al Doping." Key Engineering Materials 608 (April 2014): 193–99. http://dx.doi.org/10.4028/www.scientific.net/kem.608.193.

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Dielectric capacitors can be utilized in powder conversion systems of applications such as hybrid-electric and fuel cell vehicles. In order to fabricate capacitors that are suitable for practical uses, the materials should have moderately high dielectric constants, while retaining low loss. In this study, strontium titanate and strontium titanate samples doped with 10, 20, 30 at% of Mg and Al were tested for dielectric permittivity and dielectric loss. The results indicated that an increase in the amount of dopants led to enhancement of dielectric constants. The value of dielectric constant of

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