Results 11 to 20 of about 2,658 (209)

Strain partitioning in host rock controls LREE release from allanite-(Ce) in subduction zones [PDF]

Mineralogical Magazine, 2020
Combined microstructural, mineral chemical, X-ray maps, and X-ray single-crystal diffraction analyses are used to reveal the rheological behaviour of individual grains of magmatic allanite relicts hosted in variably deformed metagranitoids at Lago della Vecchia (inner part of the Sesia-Lanzo Zone, Western Alps, Europe), which experienced high pressure ...
Corti, Luca, Zanoni, Davide, Gatta, Giacomo Diego, Zucali, Michele   +3 more
openaire   +2 more sources

Timing of diagenesis and very low-grade metamorphism in the eastern sector of the Sierra de Cameros (Iberian Range, Spain): a U–Pb SHRIMP study on monazite [PDF]

, 2009
The Sierra de Cameros is an intracontinental orogen and represents the north-western part of the Iberian Range in Northern Spain. It comprises a thick sequence of syn-rift continental sediments (mainly sandstones and carbonates) deposited during ...
Aleinikoff, Bollinger, Cabella, Casas-Sainz, Casquet, Cherniak, Del Río, Evans, Evans, Frantz, Förster, Gabudianu Radulescu, Gil-Imaz, Goldberg, Janots, Janots, Kempe, Krenn, Lanzirotti, Lev, Mantilla-Figueroa, Mas, Masuda, Mata, Mata, Mata, Milodowski, Montel, Pan, Pan, Parrish, Rasmussen, Rasmussen, Rasmussen, Rubatto, Sawka, Smith, Spear, Tera, Tischer, Wilby, Williams, Wing   +42 more
core   +2 more sources

Application of Automated Mineral Identification and Characterization System to Identify Minerals and Occurrences of Elements in Jixiangyu Rare Earth Deposit of Eastern Liaoning

Yankuang ceshi, 2023
BACKGROUNDIn Liaoning Province, there are limited known types of rare earth deposits, and historically, exploration and evaluation efforts have mainly focused on monazite placer and alkaline rock type rare earth deposits. Less attention has been given to
Xiaoxu SUN, Jian FENG, Chao LI, Ye GAO, Lei WANG, Tong MIAO, Yang XU, Wei YAN   +7 more
doaj   +1 more source

Crystal chemistry of volcanic allanites indicative of naturally induced oxidation-dehydrogenation [PDF]

, 2010
The crystal chemistry of volcanic allanites from both the Youngest Toba Tuff (YTT), Sumatra, Indonesia and SK100 volcanic ash beds (SK100-VAB), Niigata, Japan has been examined by electron microprobe analysis (EMPA), Fourier-transform infrared ...
Akasaka Takeshi, Chesner Craig A., Hoshino Mihoko, Kimata Mitsuyoshi, Nishida Norimasa, Shimizu Masahiro, 木股 三善   +6 more
core   +1 more source

Minerals-concentrators of rare-earth elements in basites-ultrabasites intrusives of Norilsk district

Известия высших учебных заведений: Геология и разведка, 2017
The conditions of being, the history of formation and transformation of minerals-concentrators of rare-earth elements (REE) - apatite minerals group and epidote minerals group, have been studied and described.
Yu. D. Gritsenko, A. A. Serova
doaj   +1 more source

On the identification of Ti-Ta-Nb-oxides in “wiikites” from Karelia [PDF]

, 2018
Purpose. With respect to the nature of Ti-Ta-Nb-oxides, which are included in the mineral associations that have historically gone by the now outdated name of “wiikites”, there is no unanimity of opinion.
Bogdanov, R, Goldwirt, D, Hosseinpour Khanmiri, M, Janson, S, Platonova, N, Polekhovsky, Yu   +5 more
core   +1 more source

Mineralogical and geochemical aspects of rare-earth elements behavior during metamorphism (on the example of the Upper Precambrian structural-material complexes of the Bashkir megaanticlinorium, South Urals)

Georesursy, 2020
The article provides new data on geochemistry and mineralogy of rare-earth elements (REE) in rocks of structural-material complexes of the Bashkir megaanticlinorium, which underwent metamorphic transformations of various nature: contact metamorphism ...
Sergey G. Kovalev, Andrey V. Maslov, Sergey S. Kovalev   +2 more
doaj   +1 more source

Caracterização mineralógica, geoquímica e potencial econômico de ocorrências de terras raras do maciço granítico Serra do Mendes, Goiás [PDF]

, 2017
Dissertação (mestrado)—Universidade de Brasília, Instituto de Geociências, Programa de Pós-Graduação em Geologia, 2017.O Maciço Granítico Serra do Mendes (MGSM) está localizado na Província Estanífera de Goiás (PEG), que é caracterizada por corpos de ...
Zapata Montoya, Angélica María
core   +1 more source

ALLANITE-(Ce) FROM THE EOCENE CASTO GRANITE, IDAHO: RESPONSE TO HYDROTHERMAL ALTERATION [PDF]

The Canadian Mineralogist, 2000
The response of allanite-(Ce) in the Eocene Casto granite of Idaho to hydrothermal activity has been investigated. Unaltered, igneous allanite from the Casto pluton is characterized by a narrow range of compositional variation, with little or no zoning. A representative empirical formula, based on the composition of the least-altered grain, is: ( REE 0.
S. A. Wood, A. Ricketts
openaire   +1 more source

Wumuite (KAl_0.33W_2.67O₉) – a new mineral with an HTB-type structure from the Panzhihua–Xichang region in China [PDF]

European Journal of Mineralogy, 2020
Wumuite, ideally KAl0.33W2.67O9, is a new mineral species found in the Neoproterozoic Sinian light-weathered biotite–quartz monzonite in the southern part of the Panzhihua–Xichang region (Nanyang village: 26∘46′8.21′′ N, 101∘27′13.86′′ E ...
Y. Xue, Y. Xue, G. Li, Y. Xie
doaj   +1 more source