Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
First Occurrence of Titanian Hydroxylclinohumite in Marble-Hosting Gem Spinel Deposits, Luc Yen, Vietnam. / Кривовичев, Владимир Герасимович; Кукса, Катерина Александровна; Соколов, Павел Борисович; Паникоровский, Тарас Леонидович; Бочаров, Владимир Николаевич; Gussiås, Geir Atle .
в: Minerals, Том 13, № 7, 901, 02.07.2023.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - First Occurrence of Titanian Hydroxylclinohumite in Marble-Hosting Gem Spinel Deposits, Luc Yen, Vietnam
AU - Кривовичев, Владимир Герасимович
AU - Кукса, Катерина Александровна
AU - Соколов, Павел Борисович
AU - Паникоровский, Тарас Леонидович
AU - Бочаров, Владимир Николаевич
AU - Gussiås, Geir Atle
PY - 2023/7/2
Y1 - 2023/7/2
N2 - In this paper, we report the very first occurrence of titanian hydroxylclinohumite in the marble-hosted gem spinel deposits of the Luc Yen district, northern Vietnam. Hydroxylclinohumite is anhedral and associated with forsterite, tremolite, pargasite, diopside, spinel, dolomite and calcite. Hydroxylclinohumite from the Luc Yen deposit was characterized via electron microprobe analysis, single-crystal X-ray diffraction study, and Raman spectrometry. The average composition is (Mg0.69Ti0.29Fe0.02)S1.00Mg7.91(SiO4)4.08[(OH)1.10F0.53O0.37]S2.00. (ideally (Mg0.7Ti0.3)S1Mg8.0(SiO4)4 [(OH)1.2F0.5O0.3]2). The compositions of the analyzed hydroxylclinohumites have a narrow range of Mg/(Mg+Fe+Ti) values (0.96–0.97) and a defined hydroxylclinohumite solid-solution series. Compared with other occurrences, the Luc Yen hydroxylclinohumite has an average titanium content, which attains 0.31 atoms per formula unit (3.93 wt.% TiO2) and a low iron content of 0.04 atoms per formula unit (0.42 wt.% FeO). The formation of hydroxylclinohumite is favored by the proportion ofMg, and Si in the precursor rocks and the increased activity of H2O in the fluid phase.
AB - In this paper, we report the very first occurrence of titanian hydroxylclinohumite in the marble-hosted gem spinel deposits of the Luc Yen district, northern Vietnam. Hydroxylclinohumite is anhedral and associated with forsterite, tremolite, pargasite, diopside, spinel, dolomite and calcite. Hydroxylclinohumite from the Luc Yen deposit was characterized via electron microprobe analysis, single-crystal X-ray diffraction study, and Raman spectrometry. The average composition is (Mg0.69Ti0.29Fe0.02)S1.00Mg7.91(SiO4)4.08[(OH)1.10F0.53O0.37]S2.00. (ideally (Mg0.7Ti0.3)S1Mg8.0(SiO4)4 [(OH)1.2F0.5O0.3]2). The compositions of the analyzed hydroxylclinohumites have a narrow range of Mg/(Mg+Fe+Ti) values (0.96–0.97) and a defined hydroxylclinohumite solid-solution series. Compared with other occurrences, the Luc Yen hydroxylclinohumite has an average titanium content, which attains 0.31 atoms per formula unit (3.93 wt.% TiO2) and a low iron content of 0.04 atoms per formula unit (0.42 wt.% FeO). The formation of hydroxylclinohumite is favored by the proportion ofMg, and Si in the precursor rocks and the increased activity of H2O in the fluid phase.
KW - titanian hydroxylclinohumite; humite supergroup; Raman spectrum; gem spinel; marblehosted deposits; analysis of mineral parageneses; Luc Yen district; Vietnam
UR - https://www.mendeley.com/catalogue/c86e52b8-9515-3b37-9a97-440da290ef6b/
U2 - 10.3390/min13070901
DO - 10.3390/min13070901
M3 - Article
VL - 13
JO - Minerals
JF - Minerals
SN - 2075-163X
IS - 7
M1 - 901
ER -
ID: 107554927