Chemical and isotopic compositions of rocks and minerals from the Palenyi Island, Por'ya Guba (Bay), White Sea
Hypersthene-garnet-sillimanite-quartz enclaves were studied in orthopyroxene-plagioclase and orthopyroxene-clinopyroxene crystalline schists and gneisses from shear zones exposed in the Palenyi Island within the Early Proterozoic Belomorian Mobile Belt. Qualitative analysis of mineral assemblages in...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.786975 2023-05-15T18:43:54+02:00 Chemical and isotopic compositions of rocks and minerals from the Palenyi Island, Por'ya Guba (Bay), White Sea Aranovich, L Ya Dubinina, Elena O Avdeenko, Anna S Lebedeva, YuM Bushmin, S A Dolivo-Dobrovol'skii, D D MEDIAN LATITUDE: 66.678972 * MEDIAN LONGITUDE: 33.865828 * SOUTH-BOUND LATITUDE: 66.677600 * WEST-BOUND LONGITUDE: 33.863900 * NORTH-BOUND LATITUDE: 66.680200 * EAST-BOUND LONGITUDE: 33.867900 2010-08-03 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.786975 https://doi.org/10.1594/PANGAEA.786975 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.786975 https://doi.org/10.1594/PANGAEA.786975 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Aranovich, L Ya; Dubinina, Elena O; Avdeenko, Anna S; Lebedeva, YuM; Bushmin, S A; Dolivo-Dobrovol'skii, D D (2010): Oxygen isotopic composition of coexisting minerals of sillimanite-hypersthene rocks from the Por'ya Bay area: Evidence of fluid involvement in granulite-fades metamorphism. Translated from Geokhimiya, 2010, 48(8), 787-800, Geochemistry International, 48(8), 739-751, https://doi.org/10.1134/S001670291008001X Archive of Ocean Data ARCOD Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.786975 https://doi.org/10.1134/S001670291008001X 2023-01-20T07:32:38Z Hypersthene-garnet-sillimanite-quartz enclaves were studied in orthopyroxene-plagioclase and orthopyroxene-clinopyroxene crystalline schists and gneisses from shear zones exposed in the Palenyi Island within the Early Proterozoic Belomorian Mobile Belt. Qualitative analysis of mineral assemblages indicates that these rocks were metamorphosed to the granulite facies (approximately 900°C and 10-11 kbar). Oxygen isotopic composition was determined in rock-forming minerals composing zones of the enclaves of various mineral and chemical composition. Closure temperatures of the isotopic systems obtained by methods of oxygen isotopic thermometry are close to values obtained with mineralogical geothermometers (garnet-orthopyroxene and garnet-biotite) and correspond to the high-temperature granulite facies (860-900°C). Identified systematic variations in d18O values were determined in the same minerals from zones of different mineral composition. Inasmuch as these zones are practically in contact with one another, these variations in d18O cannot be explained by primary isotopic heterogeneity of the protolith. Model calculations of the extent and trend of d18O variations in minerals suggest that fluid-rock interaction at various integral fluid/rock ratios in discrete zones was the only mechanism that could generate the zoning. This demonstrates that focused fluid flux could occur in lower crustal shear zones. Preservation of high-temperature isotopic equilibria of minerals testifies that the episode of fluid activity at the peak of metamorphism was very brief. Dataset White Sea PANGAEA - Data Publisher for Earth & Environmental Science White Sea ENVELOPE(33.863900,33.867900,66.680200,66.677600) |
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Open Polar |
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PANGAEA - Data Publisher for Earth & Environmental Science |
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ftpangaea |
language |
English |
topic |
Archive of Ocean Data ARCOD |
spellingShingle |
Archive of Ocean Data ARCOD Aranovich, L Ya Dubinina, Elena O Avdeenko, Anna S Lebedeva, YuM Bushmin, S A Dolivo-Dobrovol'skii, D D Chemical and isotopic compositions of rocks and minerals from the Palenyi Island, Por'ya Guba (Bay), White Sea |
topic_facet |
Archive of Ocean Data ARCOD |
description |
Hypersthene-garnet-sillimanite-quartz enclaves were studied in orthopyroxene-plagioclase and orthopyroxene-clinopyroxene crystalline schists and gneisses from shear zones exposed in the Palenyi Island within the Early Proterozoic Belomorian Mobile Belt. Qualitative analysis of mineral assemblages indicates that these rocks were metamorphosed to the granulite facies (approximately 900°C and 10-11 kbar). Oxygen isotopic composition was determined in rock-forming minerals composing zones of the enclaves of various mineral and chemical composition. Closure temperatures of the isotopic systems obtained by methods of oxygen isotopic thermometry are close to values obtained with mineralogical geothermometers (garnet-orthopyroxene and garnet-biotite) and correspond to the high-temperature granulite facies (860-900°C). Identified systematic variations in d18O values were determined in the same minerals from zones of different mineral composition. Inasmuch as these zones are practically in contact with one another, these variations in d18O cannot be explained by primary isotopic heterogeneity of the protolith. Model calculations of the extent and trend of d18O variations in minerals suggest that fluid-rock interaction at various integral fluid/rock ratios in discrete zones was the only mechanism that could generate the zoning. This demonstrates that focused fluid flux could occur in lower crustal shear zones. Preservation of high-temperature isotopic equilibria of minerals testifies that the episode of fluid activity at the peak of metamorphism was very brief. |
format |
Dataset |
author |
Aranovich, L Ya Dubinina, Elena O Avdeenko, Anna S Lebedeva, YuM Bushmin, S A Dolivo-Dobrovol'skii, D D |
author_facet |
Aranovich, L Ya Dubinina, Elena O Avdeenko, Anna S Lebedeva, YuM Bushmin, S A Dolivo-Dobrovol'skii, D D |
author_sort |
Aranovich, L Ya |
title |
Chemical and isotopic compositions of rocks and minerals from the Palenyi Island, Por'ya Guba (Bay), White Sea |
title_short |
Chemical and isotopic compositions of rocks and minerals from the Palenyi Island, Por'ya Guba (Bay), White Sea |
title_full |
Chemical and isotopic compositions of rocks and minerals from the Palenyi Island, Por'ya Guba (Bay), White Sea |
title_fullStr |
Chemical and isotopic compositions of rocks and minerals from the Palenyi Island, Por'ya Guba (Bay), White Sea |
title_full_unstemmed |
Chemical and isotopic compositions of rocks and minerals from the Palenyi Island, Por'ya Guba (Bay), White Sea |
title_sort |
chemical and isotopic compositions of rocks and minerals from the palenyi island, por'ya guba (bay), white sea |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.786975 https://doi.org/10.1594/PANGAEA.786975 |
op_coverage |
MEDIAN LATITUDE: 66.678972 * MEDIAN LONGITUDE: 33.865828 * SOUTH-BOUND LATITUDE: 66.677600 * WEST-BOUND LONGITUDE: 33.863900 * NORTH-BOUND LATITUDE: 66.680200 * EAST-BOUND LONGITUDE: 33.867900 |
long_lat |
ENVELOPE(33.863900,33.867900,66.680200,66.677600) |
geographic |
White Sea |
geographic_facet |
White Sea |
genre |
White Sea |
genre_facet |
White Sea |
op_source |
Supplement to: Aranovich, L Ya; Dubinina, Elena O; Avdeenko, Anna S; Lebedeva, YuM; Bushmin, S A; Dolivo-Dobrovol'skii, D D (2010): Oxygen isotopic composition of coexisting minerals of sillimanite-hypersthene rocks from the Por'ya Bay area: Evidence of fluid involvement in granulite-fades metamorphism. Translated from Geokhimiya, 2010, 48(8), 787-800, Geochemistry International, 48(8), 739-751, https://doi.org/10.1134/S001670291008001X |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.786975 https://doi.org/10.1594/PANGAEA.786975 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.786975 https://doi.org/10.1134/S001670291008001X |
_version_ |
1766234431577653248 |