title: Kaalamo and Velimyaki paleoroterozoic gabbroid massifs of the Northern Ladoga area: Thermodynamic modeling of crystallization and evolution trends of igneous rocks
metadata.name: dc.contributor.author
metadata.value: Anisimov, Roman L.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Petrakova, Marina E.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Baltybaev, Shauket K.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2023-09-05T17:17:07Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2023-09-05T17:17:07Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2023-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Anisimov, R. L., Petrakova, M. E., Baltybaev, Sh. K. (2023). Kaalamo and Velimyaki paleoroterozoic gabbroid massifs of the Northern Ladoga area: Thermodynamic modeling of crystallization and evolution trends of igneous rocks. Vestnik of Saint Petersburg University. Earth Sciences, 68 (2), 265–292. https://doi.org/10.21638/spbu07.2023.204 (In Russian)
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2023.204
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/43958
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Kaalamo and Velimyaki gabbroid massifs are located in the south-eastern part of the Raahe-
  Ladoga suture zone of the Karelian craton and the Sveсofennian mobile belt. These massifs
  were formed almost simultaneously 1.89 Ga ago, occupy the same tectonic position and are
  located in a single unit of the Early Proterozoic metamorphosed rocks: the intrusions are
  contained by the Early Proterozoic supracrustal stratas: garnet-biotite gneisses and micaceous
  shales of the Ladoga series, as well as amphibolites of the Sortavala series. Despite this, the
  gabbroids of the compared massifs differ sharply in their material composition, especially the
  content of alkalis in a differentiated series of rocks. The results of thermodynamic modeling
  of magmatic crystallization (Magma Chamber Simulator, MELTS packages) showed that a
  differentiated sub-alkaline series of rocks of the Velimyaki massif cannot be obtained from
  magma of the Kaalamo massif by slightly changing such parameters as pressure, water content
  in the melt, and oxygen fugacity. The assumption of a significant difference in these parameters
  for magmas of the Kaalamo and Velimyaki massifs is not confirmed at the mineralogical-
  petrographic level and other characteristics of the rocks of the compared ones. The effect
  of contamination at the level of the magma chamber also does not significantly shift the trend
  of rock compositions from the calc-alkaline region to the sub-alkaline region. Analysis of the
  results of thermodynamic modeling of magmatic mineral formation in the two massifs allows
  us to make it possible to conclude that the Kaalamo and Velimyaki massifs were formed either
  from various parent melts, or their initial melt was one, but the magma of the Velimyaki
  massif underwent contamination with enrichment with alkalis along the migration route of
  magma until the level of the upper crust was reached.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: This work was funded by the Research Project of the Institute of Precambrian Geology and
  Geochronology of the Russian Academy of Sciences (no. FMUW-2022-0002) of the Ministry of Education
  and Science of the Russian Federation.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Earth Sciences;Volume 68; Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: paleoproterozoic
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Svecofennian belt
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: gabbroids
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: thermodynamic modeling
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: MCS
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: MELTS
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Kaalamo and Velimyaki paleoroterozoic gabbroid massifs of the Northern Ladoga area: Thermodynamic modeling of crystallization and evolution trends of igneous rocks
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 04.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/43958/1/04.pdf
resources.format: Adobe PDF
resources.size: 8,68 MB