Research output: Contribution to journal › Article › peer-review
Cristobalite and Tridymite from the Arsenatnaya Fumarole Deposits (Tolbachik Volcano, Kamchatka, Russia). / Sandalov, F. D.; Shchipalkina, N. V.; Pekov, I. V.; Koshlyakova, N. N.; Britvin, S. N.; Sidorov, E. G.
In: Moscow University Geology Bulletin, Vol. 76, No. 3, 24.05.2021, p. 325-335.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Cristobalite and Tridymite from the Arsenatnaya Fumarole Deposits (Tolbachik Volcano, Kamchatka, Russia)
AU - Sandalov, F. D.
AU - Shchipalkina, N. V.
AU - Pekov, I. V.
AU - Koshlyakova, N. N.
AU - Britvin, S. N.
AU - Sidorov, E. G.
N1 - Sandalov, F.D., Shchipalkina, N.V., Pekov, I.V. et al. Cristobalite and Tridymite from the Arsenatnaya Fumarole Deposits (Tolbachik Volcano, Kamchatka, Russia). Moscow Univ. Geol. Bull. 76, 325–335 (2021). https://doi.org/10.3103/S0145875221030108
PY - 2021/5/24
Y1 - 2021/5/24
N2 - Abstract: This article provides data on cristobalite and tridymite from the Arsenatnaya active fumarole of the Tolbachik volcano, Kamchatka, Russia. The minerals occur in associations with fumarolic sylvite, sanidine, cassiterite, hematite, pseudobrookite, johillerite, tilasite, and badalovite. Fumarolic cristobalite is tetragonal (α-modification); the unit-cell parameters for one sample are: а = 4.975 (7) Å, с = 6.944 (13) Å, and V = 171.89 Å3. There are two types of tridymite, that is, monoclinic (MC) and orthoorthorhombic (PO-10), in the Arsenatnaya fumarole. The unit-cell parameters of these tridymite modifications are: a = 18.553 (5) Å, b = 5.006 (1) Å, с = 25.952 (10) Å, β = 117.68 (2)°, V = 2134.3 (11) Å3 (MC); a = 9.941 (2) Å, b = 17.165 (4) Å, с = 82.362 (18) Å, and V = 14053.4 (29) Å3 (PO-10). Mineral assemblages of cristobalite and tridymite indicate high-temperature formation conditions of these minerals not lower 450–500°С with considerable participation of HCl and HF in process of basalt alteration by fumarolic gas. The surrounding basalt was a source of silicon. This element was probably transported in the form of SiX4, where X = F, Cl.
AB - Abstract: This article provides data on cristobalite and tridymite from the Arsenatnaya active fumarole of the Tolbachik volcano, Kamchatka, Russia. The minerals occur in associations with fumarolic sylvite, sanidine, cassiterite, hematite, pseudobrookite, johillerite, tilasite, and badalovite. Fumarolic cristobalite is tetragonal (α-modification); the unit-cell parameters for one sample are: а = 4.975 (7) Å, с = 6.944 (13) Å, and V = 171.89 Å3. There are two types of tridymite, that is, monoclinic (MC) and orthoorthorhombic (PO-10), in the Arsenatnaya fumarole. The unit-cell parameters of these tridymite modifications are: a = 18.553 (5) Å, b = 5.006 (1) Å, с = 25.952 (10) Å, β = 117.68 (2)°, V = 2134.3 (11) Å3 (MC); a = 9.941 (2) Å, b = 17.165 (4) Å, с = 82.362 (18) Å, and V = 14053.4 (29) Å3 (PO-10). Mineral assemblages of cristobalite and tridymite indicate high-temperature formation conditions of these minerals not lower 450–500°С with considerable participation of HCl and HF in process of basalt alteration by fumarolic gas. The surrounding basalt was a source of silicon. This element was probably transported in the form of SiX4, where X = F, Cl.
KW - fumarole
KW - gas metasomatosis
KW - Kamchatka
KW - Keywords: cristobalite
KW - silica minerals
KW - Tolbachik volcano
KW - tridymite
KW - FLUIDS
KW - Keywords
KW - MONOCLINIC TRIDYMITE
KW - cristobalite
KW - CRYSTAL
KW - EVOLUTION
KW - TEMPERATURE
KW - MINERALIZATION
KW - X-RAY
UR - http://www.scopus.com/inward/record.url?scp=85113319033&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/97a31839-ea9e-3753-9b9a-9d518ab0ea20/
U2 - 10.3103/s0145875221030108
DO - 10.3103/s0145875221030108
M3 - Article
AN - SCOPUS:85113319033
VL - 76
SP - 325
EP - 335
JO - Moscow University Geology Bulletin
JF - Moscow University Geology Bulletin
SN - 0145-8752
IS - 3
ER -
ID: 86027726