title: About the genesis of ovoidal K-feldspar porphyry and quartz in rapakivi granites and related rocks
metadata.name: dc.contributor.author
metadata.value: Belyaev, Anatoly M.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2017-07-15T19:38:30Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2017-07-15T19:38:30Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2017-03
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Belyaev A. M. About the genesis of ovoidal K-feldspar porphyry and quartz in rapakivi granites and related rocks. Vestnik SPbSU. Earth Sciences, 2017, vol. 62, issue 1, pp. 3–19.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: 10.21638/11701/spbu07.2017.101
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/6810
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: A comparative study of structural peculiarities of ovoid K-feldspar porphyry and quartz of rapakivi
  granite of different arrays (Aland, Vyborg, Salmi batholith rapakivi of the Baltic shield and Bardiaush
  batholith rapakivi of the South Ural), and hybrid rocks of various genesis allowed us to clarify their
  role in the formation of rapakivi granite complexes.
  It was established, that the porphyritic quartz and ovoides of K-feldspar and their plagioclase shell
  was formed before the crystallization of the residual cotectic melt of rapakivi granite. In the composite
  hybrid magmatic rocks xenocryst K-spar have undergone a disintegration of solid solution with formation of a secondary cryptoperthite plagioclase. And xenocrystic quartz was subject to decrepitation
  by primary fluid inclusions and the formation of new secondary high-temperature inclusions. In a
  hybrid composite rocks formed as metamorphic and basic igneous rocks ovoid-like porphyroblast Kspar
  (including plagioclase shells) and quartz porphyry (including the ‘ocelly’) was crystallized from
  solution. In the crystals of quartz primary inclusions (negative crystals) of trigonal symmetry were
  present, typical for low-temperature α-modification. Refs 24. Figs 9. Tables 2.
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. Eart Sciences;Volume 62; Issue 1
metadata.lang: -
metadata.name: dc.subject
metadata.value: granite rapakivi
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: ovoides
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: porphyroblast
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: hybrid rocks
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: metasomatic rocks
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: About the genesis of ovoidal K-feldspar porphyry and quartz in rapakivi granites and related rocks
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 01-Belyaev.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/6810/1/01-Belyaev.pdf
resources.format: Adobe PDF
resources.size: 3,21 MB