Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry
The Suursaari volcanic sequence represents volcanic activity related to Wiborg Batholith rapakivi intrusions in the southern part of the Fennoscandian Shield. The estimated pressure conditions for batholith granitic rocks are 1–5 kbar and crystallization temperatures range from 670 to 890 °C. To des...
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Estonian Academy Publishers
2012-11-01
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Online Access: | http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2012/issue_4/earth-2012-4-195-204.pdf |
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doaj-212a23e745d9412bb0683ab9cbe5d0442020-11-24T23:35:45ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572012-11-0161419520410.3176/earth.2012.4.01Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyryKairi EhrlichEvelin VeršJuho KirsAlvar SoesooThe Suursaari volcanic sequence represents volcanic activity related to Wiborg Batholith rapakivi intrusions in the southern part of the Fennoscandian Shield. The estimated pressure conditions for batholith granitic rocks are 1–5 kbar and crystallization temperatures range from 670 to 890 °C. To describe the temperature regime of the Suursaari volcanic system, a rock sample was taken from the Mäkiinpäällys Mountain outcrop and analysed with laser ablation inductively coupled plasma mass spectrometry. Sample spots were selected from quartz phenocrysts and groundmass. Quartz crystallization temperatures were calculated by the Ti-in-quartz method that takes into account rutile equilibrium and Ti activity in each phase. The calculated crystallization temperatures of the Suursaari quartz porphyry are in the range of 647–738 °C. The results show that the Suursaari quartz porphyry contains two generations of quartz which can be distinguished on the basis of crystallization temperatures: phenocrysts crystallized at higher and groundmass quartz at lower temperature.http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2012/issue_4/earth-2012-4-195-204.pdfvolcanicsquartz porphyrycrystallization temperatureTi-in-quartz geothermometerlaser ablation inductively coupled plasma mass spectrometrySuursaari. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kairi Ehrlich Evelin Verš Juho Kirs Alvar Soesoo |
spellingShingle |
Kairi Ehrlich Evelin Verš Juho Kirs Alvar Soesoo Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry Estonian Journal of Earth Sciences volcanics quartz porphyry crystallization temperature Ti-in-quartz geothermometer laser ablation inductively coupled plasma mass spectrometry Suursaari. |
author_facet |
Kairi Ehrlich Evelin Verš Juho Kirs Alvar Soesoo |
author_sort |
Kairi Ehrlich |
title |
Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry |
title_short |
Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry |
title_full |
Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry |
title_fullStr |
Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry |
title_full_unstemmed |
Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry |
title_sort |
using a titanium-in-quartz geothermometer for crystallization temperature estimation of the palaeoproterozoic suursaari quartz porphyry |
publisher |
Estonian Academy Publishers |
series |
Estonian Journal of Earth Sciences |
issn |
1736-4728 1736-7557 |
publishDate |
2012-11-01 |
description |
The Suursaari volcanic sequence represents volcanic activity related to Wiborg Batholith rapakivi intrusions in the southern part of the Fennoscandian Shield. The estimated pressure conditions for batholith granitic rocks are 1–5 kbar and crystallization temperatures range from 670 to 890 °C. To describe the temperature regime of the Suursaari volcanic system, a rock sample was taken from the Mäkiinpäällys Mountain outcrop and analysed with laser ablation inductively coupled plasma mass spectrometry. Sample spots were selected from quartz phenocrysts and groundmass. Quartz crystallization temperatures were calculated by the Ti-in-quartz method that takes into account rutile equilibrium and Ti activity in each phase. The calculated crystallization temperatures of the Suursaari quartz porphyry are in the range of 647–738 °C. The results show that the Suursaari quartz porphyry contains two generations of quartz which can be distinguished on the basis of crystallization temperatures: phenocrysts crystallized at higher and groundmass quartz at lower temperature. |
topic |
volcanics quartz porphyry crystallization temperature Ti-in-quartz geothermometer laser ablation inductively coupled plasma mass spectrometry Suursaari. |
url |
http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2012/issue_4/earth-2012-4-195-204.pdf |
work_keys_str_mv |
AT kairiehrlich usingatitaniuminquartzgeothermometerforcrystallizationtemperatureestimationofthepalaeoproterozoicsuursaariquartzporphyry AT evelinvers usingatitaniuminquartzgeothermometerforcrystallizationtemperatureestimationofthepalaeoproterozoicsuursaariquartzporphyry AT juhokirs usingatitaniuminquartzgeothermometerforcrystallizationtemperatureestimationofthepalaeoproterozoicsuursaariquartzporphyry AT alvarsoesoo usingatitaniuminquartzgeothermometerforcrystallizationtemperatureestimationofthepalaeoproterozoicsuursaariquartzporphyry |
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1725524851982073856 |