VOLATILES IN SUPRASUBDUCTION BASALTIC MELTS FROM TOLBACHIK VOLCANO (Kamchatka)

2017 ◽  
Keyword(s):  
Tolbachik Volcano ◽  
Basaltic Melts

Genesis of volatiles in suprasubduction basaltic melts from Tolbachik Volcano, Kamchatka

2017 ◽  
Vol 58 (8) ◽  
pp. 869-886 ◽  
Author(s):  
N.L. Dobretsov ◽  
V.A. Simonov ◽  
A.V. Kotlyarov ◽  
S.I. Stupakov
Keyword(s):  
Tolbachik Volcano ◽  
Basaltic Melts

scholarly journals High Sulfur in Primitive Arc Magmas, Its Origin and Implications

Minerals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 37
Author(s):  
Michael Zelenski ◽  
Vadim S. Kamenetsky ◽  
Nikolai Nekrylov ◽  
Alkiviadis Kontonikas-Charos
Keyword(s):  
Subduction Zones ◽  
Melt Inclusions ◽  
Solubility Limit ◽  
Calc Alkaline ◽  
Sulfur Solubility ◽  
Arc Magmas ◽  
Tolbachik Volcano ◽  
Magmatic Sulfide ◽  
Low Sulfur ◽  
Basaltic Melts

Sulfur contents in 98.5% of melt inclusions (MI) from calc-alkaline subduction basalts do not exceed 4000 ppm, whereas experimentally established limits of sulfur solubility in basaltic melts with high fO2 (characteristic of subduction zones, e.g., QFM + 2) surpass 14,000 ppm. Here we show that primitive (Mg# 62-64) subduction melts may contain high sulfur, approaching the experimental limit of sulfur solubility. Up to 11,700 ppm S was measured in olivine-hosted MI from primitive arc basalt from the 1941 eruption of the Tolbachik volcano, Kamchatka. These MI often contain magmatic sulfide globules (occasionally enriched in Cu, Ni, and platinum-group elements) and anhydrite enclosed within a brown, oxidized glass. We conclude that the ubiquitous low sulfur contents in MI may originate either from insufficient availability of sulfur in the magma generation zone or early magma degassing prior to inclusion entrapment. Our findings extend the measured range of sulfur concentrations in primitive calc-alkaline basaltic melts and demonstrate that no fundamental limit of 4000 ppm S exists for relatively oxidized subduction basalts, where the maximum sulfur content may approach the solubility limit determined by crystallization of magmatic anhydrite.

LIQUIDUS THERMO-BAROMETER FOR THE MODELING OF MAGNETITE — MELT EQUILIBRIUM

2018 ◽  
pp. 71-80
Author(s):  
N. S. Aryaeva ◽  
E. V. Koptev-Dvornikov ◽  
D. A. Bychkov
Keyword(s):  
Experimental Data ◽  
Liquidus Temperature ◽  
Vertical Structure ◽  
Maximum Error ◽  
Silicate Melt ◽  
System Of Equations ◽  
Wide Range ◽  
Basaltic Melts ◽  
Multidimensional Statistics

A system of equations of thermobarometer for magnetite-silicate melt equilibrium was obtained by method of multidimensional statistics of 93 experimental data of a magnetite solubility in basaltic melts. Equations reproduce experimental data in a wide range of basalt compositions, temperatures and pressures with small errors. Verification of thermobarometers showed the maximum error in liquidus temperature reproducing does not exceed ±7 °C. The level of cumulative magnetite appearance in the vertical structure of Tsypringa, Kivakka, Burakovsky intrusions predicted with errors from ±10 to ±50 m.

scholarly journals Melt movement through the Icelandic crust

2019 ◽  
Vol 377 (2139) ◽  
pp. 20180010 ◽  
Author(s):  
Robert S. White ◽  
Marie Edmonds ◽  
John Maclennan ◽  
Tim Greenfield ◽  
Thorbjorg Agustsdottir
Keyword(s):  
Carbon Dioxide ◽  
Time Scales ◽  
Upper Mantle ◽  
High Strain ◽  
Strain Rates ◽  
Complementary Information ◽  
Reservoir Architecture ◽  
Rift Zones ◽  
Shallow Crust ◽  
Basaltic Melts

We use both seismology and geobarometry to investigate the movement of melt through the volcanic crust of Iceland. We have captured melt in the act of moving within or through a series of sills ranging from the upper mantle to the shallow crust by the clusters of small earthquakes it produces as it forces its way upward. The melt is injected not just beneath the central volcanoes, but also at discrete locations along the rift zones and above the centre of the underlying mantle plume. We suggest that the high strain rates required to produce seismicity at depths of 10–25 km in a normally ductile part of the Icelandic crust are linked to the exsolution of carbon dioxide from the basaltic melts. The seismicity and geobarometry provide complementary information on the way that the melt moves through the crust, stalling and fractionating, and often freezing in one or more melt lenses on its way upwards: the seismicity shows what is happening instantaneously today, while the geobarometry gives constraints averaged over longer time scales on the depths of residence in the crust of melts prior to their eruption. This article is part of the Theo Murphy meeting issue ‘Magma reservoir architecture and dynamics'.

scholarly journals High‐temperature gold‐copper extraction with chloride flux in lava tubes of Tolbachik volcano (Kamchatka)

Terra Nova ◽  
2019 ◽  
Vol 31 (6) ◽  
pp. 511-517 ◽  
Author(s):  
Vadim S. Kamenetsky ◽  
Alexander Belousov ◽  
Victor V. Sharygin ◽  
Liudmila M. Zhitova ◽  
Kathy Ehrig ◽  
...  
Keyword(s):  
High Temperature ◽  
Copper Extraction ◽  
Chloride Flux ◽  
Lava Tubes ◽  
Tolbachik Volcano

Romanorlovite, a New Copper and Potassium Hydroxychloride from the Tolbachik Volcano, Kamchatka, Russia

2017 ◽  
Vol 59 (7) ◽  
pp. 601-608 ◽  
Author(s):  
I. V. Pekov ◽  
V. O. Yapaskurt ◽  
S. N. Britvin ◽  
M. F. Vigasina ◽  
I. S. Lykova ◽  
...  
Keyword(s):  
Tolbachik Volcano

Sulphur solubility in andesitic to basaltic melts: implications for Hekla volcano

2008 ◽  
Vol 157 (6) ◽  
pp. 691-707 ◽  
Author(s):  
Séverine Moune ◽  
François Holtz ◽  
Roman E. Botcharnikov
Keyword(s):  
Basaltic Melts

Rates and processes of crystallization in on-axis and off-axis MOR basaltic melts

Lithos ◽  
2012 ◽  
Vol 154 ◽  
pp. 1-15 ◽  
Author(s):  
Georg F. Zellmer ◽  
Peter Dulski ◽  
Yoshiyuki Iizuka ◽  
Michael R. Perfit
Keyword(s):  
Basaltic Melts

Basaltic melts in olivine from alkaline pumice of Primor’e: Evidence from the study of melt inclusions

2011 ◽  
Vol 438 (1) ◽  
pp. 656-660 ◽  
Author(s):  
O. A. Andreeva ◽  
V. B. Naumov ◽  
I. A. Andreeva ◽  
V. I. Kovalenko
Keyword(s):  
Melt Inclusions ◽  
Basaltic Melts
Sign in / Sign up

Export Citation Format

Share Document