title: Petrology of magmatic rocks of the Khara-Sis massif (Northern Verkhoyansk-Kolyma orogenic region)
metadata.name: dc.contributor.author
metadata.value: Trunilina, Vera A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Roev, Sergey P.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-12-17T10:58:55Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-12-17T10:58:55Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2020-09
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Trunilina V.A., Roev S.P. (2020). Petrology of magmatic rocks of the Khara-Sis massif (Northern Verkhoyansk-Kolyma orogenic region). Vestnik of Saint Petersburg University. Earth Sciences, 65 (3), 528–551.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2020.307
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/21696
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The article discusses the specific composition of igneous rocks of the Late Cretaceous monzonite-syenite-granite Khara-Sis massif, localized at the intersection of long-lived faults in
  the northeastern part of the Selennyakh anticlinorium. In most discriminatory diagrams, the
  points of monzonite and syenite compositions, on the one hand, and fluorite granites, on the
  other, set different trends, which indicates different sources of melts and different ways of their
  crystallization. Based on these data, typomorphism of rock-forming, accessory, and restite
  minerals, and the nature of the distribution of trace elements in the rocks, it is concluded that the massif is multi-formation. Monzonites and syenites correspond to post-orogenic formations of the shoshonite series and have mantle-crustal origin. The initial melt was formed at
  the specified temperature of 1050–1060 °C and a pressure of 1.7–1.9 GPA as a result of partial
  mixing of the lower crust melt and the melt inflowing from the horizons of the metasomatized
  mantle. Model Rb-Sr values of granites characterize them as crustal formations. According
  to all parameters of composition they belong to post-orogenic A-type granites. The disparity
  between high temperatures of the parent melt (1000–1025 °С), comparable to high temperatures of monzonite melt, at a significantly lower pressure of magma generation (0.7–0.8 GPA),
  indicates that granite was formed in the crust upon heat inflow from an outer (deep) source.
  All rocks of the massif have high contents of REE, Y, U and Th, increasing from monzonites
  to granites and are comparable with contents of REE, Y, U and Th only in the metasomatized mantle. It is concluded that deep fluids rich in these elements were supplied into crust
  substrates during the formation of the granite chamber, and an increase of the flow of deep
  substrates.
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 65; Issue 3
metadata.lang: -
metadata.name: dc.subject
metadata.value: monzonite
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: syenite
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: granite
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: typomorphism of minerals
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: mantle-crust magma generation
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: crystallization
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: geochemical specialization
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Petrology of magmatic rocks of the Khara-Sis massif (Northern Verkhoyansk-Kolyma orogenic region)
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 528-551.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/21696/1/528-551.pdf
resources.format: Adobe PDF
resources.size: 3,51 MB