Results 81 to 90 of about 4,934 (160)

Titanite low-temperature alteration and Ti mobility

, 2015
A pseudomorphous aggregate after titanite composed of smectite, anatase and residual titanite of composition (Ca0.98,Mn0.02)(Ti0.65,Al0.35)[SiO4](O0.65,OH0.35), from a depth of 450 m in the Broken Hill South Mine, New South Wales, Australia, was ...
Eggleton, Richard, Tilley, David
core   +1 more source

Experimental effects of thermal cycling on titanite morphology and growth [PDF]

, 2016
One-atmosphere, thermal cycling experiments on titanite in silicic melt provide growth rates, crystal number densities, and textural morphologies in order to better understand crystal populations in thermally oscillating magmatic environments.
Wickland, Tyler
core   +1 more source

Gemological and Chemical Characterization of Gem-Quality Titanite from Morocco

Crystals
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.
Yu Yuan, Zhuang Miao, Yi Zhao, Bo Xu, Jialu Gu, Pengyu Yuan   +5 more
doaj   +1 more source

U-Pb age of Kaapvaal craton titanite: geotectonic interpretation and correlation with the Karelian craton

Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2019
The results of dating of Kaapvaal Craton titanite are reported. It is shown that metamorphiczircon, apatite, amphibole and garnet in the Neoarchaean tectono-thermal activation belt in the eastern Swaziland terrane have an age of ca.
Наталья Сергеевна Нестерова, Александр Иванович Слабунов, Наиля Гаптрахмановна Ризванова, Natalya Nesterova, Alexander Slabunov, Nailya Rizvanova   +5 more
doaj   +1 more source

Geochemical characteristics of titanite and U-Pb age of garnet from mineral mines of the Southern Urals

Записки Горного института
Mineralogical-geochemical (SIMS method) study of titanite and geochronological (ID-TIMS method) study of garnets from mineral mines of the Southern Urals has been carried out. The mineral associations containing titanite belong to four contrasting types:
Vladislav S. Stativko, Anton B. Kuznetsov, Vadim V. Smolensky, Nailya G. Rizvanova, Nadezhda A. Sergeeva   +4 more
doaj  

Geochronology of the felsic rocks in Orijärvi, southern Finland – implications for stratigraphy [PDF]

Estonian Journal of Earth Sciences
The Orijärvi area within the Paleoproterozoic Uusimaa belt contains volcanic and minor sedimentary formations, providing valuable insights into the oldest Svecofennian crust in southern Finland.
Elisa Toivanen, Teemu Vehkamäki, Markku Väisänen, Jaakko Kara, Hugh O’Brien   +4 more
doaj   +1 more source

Proveniência da Titanite no Algarve (Sul de Portugal) [PDF]

, 2014
Com o objectivo de avaliar a proveniência da titanite existente nas praias e ribeiras do Algarve e avaliar o seu potencial para estudos de proveniência, foram estudadas diversas amostras recolhidas em afloramentos rochosos e em sedimentos detríticos de ...
Veiga-Pires, C., Fernandes, Paulo, Machado, Nuno, Rodrigues, Bruno   +3 more
core   +1 more source

Alteration of detrital titanite in the Drahany Upland [PDF]

, 2016
Titanite is a common accessory mineral of magmatic rocks, low- and medium-grade metamorphic rocks and it occurs as a detrital mineral in clastic sediments.
Čopjaková, Renata, Novotný, Aleš
core  

Al-Rich Titanites from Mont Blanc Alpine Fissures: Evidence of Ti-Nb-Y-REE Mobility during Water–Rock Interactions

Crystals
Titanites can be excellent markers of element transfer in medium-temperature retrograde metamorphism. Euhedral titanites from several alpine fissures from Mont Blanc, particularly those of Périades and Courtes, crystallised at the end of the main quartz ...
Michel Cathelineau, Chantal Peiffert
doaj   +1 more source

Sm-Nd and U-Pb systematics of single titanite grains

, 2016
Combined Sm-Nd and U-Pb isotopic systems in single titanite grains from Archean rocks may be used to obtain Nd isotope composition at the time of titanite growth.
Amelin, Yuri
core   +1 more source