title: Geological position and mineral composition of kyanite amphibolites of the Chupinskiy paragneiss belt (Belomorian province of Eastern Fennoscandia)
metadata.name: dc.contributor.author
metadata.value: Akimova, Ekaterina Yu.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Azimov, Pavel Ya.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Serebryakov, Nikolay S.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2021-08-20T19:10:44Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2021-08-20T19:10:44Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2021-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Akimova, E. Yu., Azimov, P. Ya., Serebryakov, N. S. (2021). Geological position and mineral composition of kyanite amphibolites of the Chupinskiy paragneiss belt (Belomorian province of Eastern Fennoscandia). Vestnik of Saint Petersburg University. Earth Sciences, 66 (2), 310–330.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2021.207
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/32806
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The Lyagkomina occurrence of kyanite amphibolites (the Belomorian Province of the Fennoscandian
  Shield) is confined to an amphibolite boudin among kyanite-garnet-biotite and
  garnet-biotite gneisses of the Chupa Sequence. The main rock types at the Lyagkomina occurrence
  are meso- and melanocratic garnet-kyanite amphibolites with large kyanite (more
  than 1 cm in length) and kyanite-garnet amphibolites with small kyanite. There are also leucocratic
  garnet-biotite-amphibole-plagioclase rocks with kyanite, melanocratic epidote-staurolite-
  amphibole rocks, zoisite plagioclasites with staurolite and kyanite. The country gneisses
  around the boudin were metasomatically altered: quartz disappears in kyanite gneisses, and
  amphibole appears in garnet-biotite gneisses. Calcic amphiboles in the kyanite amphibolites
  are represented by high-alumina tschermakite; biotite — by intermediate-alumina phlogopite;
  garnet belongs to the pyrope-almandine series with a high grossular content. Plagioclases
  have an intermediate and basic composition. Intermediate plagioclases are common
  in kyanite amphibolites without staurolite and in kyanite amphibolites with staurolite rims,
  while the basic plagioclases are found in staurolite amphibolites. Many rocks are characterized
  by reaction structures, representing the change of the mineral assemblages. Metasomatic
  zoning has been reconstructed in the occurrence with a regular sequence of the mineral
  assemblages: Hbl + Grt + Pl + Qtz ± Bt (garnet amphibolite)  Hbl + Grt + Pl + Ky + Qtz ± Bt 
  Hbl + Grt + Pl + Ky ± Bt  Hbl + Grt + Pl + Ky + St ± Bt  Hbl + Grt + Ky + Pl + St + Czo ± Bt 
  Hbl + Grt + Pl + St + Czo ± Bt  Hbl + St + Czo + Pl ± Bt. In the described series, the alumina
  content increases and the Mg content of the main rock-forming minerals decreases, and desilication
  of the rock occurs. The described mineral zoning was formed during metamorphism
  as a result of the reaction between the initial amphibolite and fluid flow in the shear zone (i. e.,
  at synmetamorphic metasomatism). Petrological and isotope data indicate that the Lyagkomina
  kyanite amphibolites are genetically related to the occurrences of corundum-bearing rocks
  in the Belomorian Province of the Fennoscandian Shield.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: Study was carried out with State Task Project of the IPGG RAS (NIR FMUW-2021-0002 and
  FMUW-2019-0013) and supported with RFBR (grant No. 17-05-00265).
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 66; Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: Belomorian province
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: metasomatism
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: kyanite
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: staurolite
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: amphibolites
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: corundum- bearing rocks
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Geological position and mineral composition of kyanite amphibolites of the Chupinskiy paragneiss belt (Belomorian province of Eastern Fennoscandia)
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 310-330.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/32806/1/310-330.pdf
resources.format: Adobe PDF
resources.size: 8,82 MB