title: Isotope-geochemical (Sm–Nd, Rb–Sr, REE, HFSE) composition of the University foidolite-gabbro pluton, Kuznetsk Alatau ridge, Siberia
metadata.name: dc.contributor.author
metadata.value: Mustafaev, Agababa A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Gertner, Igor F.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2021-02-11T20:17:58Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2021-02-11T20:17:58Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2020-12
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Mustafaev, A. A., Gertner, I. F. (2020). Isotope-geochemical (Sm–Nd, Rb–Sr, REE, HFSE) composition of the University foidolite-gabbro pluton, Kuznetsk Alatau ridge, Siberia. Vestnik of Saint Petersburg University. Earth Sciences, 65 (4), 681–701.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2020.405
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/23889
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The University foidolite-gabbro pluton is located among the Cambrian carbonate-volcanogenic
  deposits. Its composition is dominated by subalkaline and alkaline mafic rocks, broken
  by dikes of ijolite-urtites, nepheline and alkaline syenites. The chemical composition of
  igneous rocks is characterized by low silica contents (SiO2 = 41–49 wt. %), wide variations
  of alkalinity (Na2O + K2O = 3–19 wt. %; Na2O/K2O = 1.2–7.2 wt. %), low titanium content
  (TiO2 = 0.07–1.59 wt. %) and high alumina content (Al2O3 = 15–28 wt. %), which corresponds
  to the K-Na derivatives of the basic-alkaline formation. By their content of rare earth elements,
  alkaline rocks (104–246 ppm; La/Yb(n) = 5.79–12.73) are more differentiated derivatives
  than gabbro (94–111 ppm; La/Yb(n) = 6.87–6.95). All varieties are characterized by low
  concentrations of most highly charged elements (Nb, Ta, Zr, Hf, +Y), which in terms of accumulation
  are located between the basalts of oceanic islands and basalts of island arcs. The
  presence of negative Nb–Ta anomaly and the relative enrichment of Rb, Ba, Sr, and U indicate
  the probable interaction of plume material with previously formed accretionary complexes of
  subduction zones. The primary isotope 87Sr/86Sr ratio (~ 0.705–0.706) and a wide range of εNd
  (T) from +3.2 to +8.7 in the rocks also indicate a mantle-crustal nature and a complex geodynamic
  setting of the Paleozoic alkaline magmatism of the Kuznetsk Alatau. The obtained
  results of Sm–Nd dating suggest the formation of subalkaline gabbroids in the Early Paleozoic
  (494–491 ± 36 Ma), with the intrusion of dikes of alkaline rocks of the Middle Paleozoic age
  (394 ± 16 and 389 ± 37 Ma).
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: The geochemical study was funded by Russian Foundation for Basic Research (project No. 19-35-
  90030). Isotope-geochronological studies were carried out at the expense of the Russian Science Foundation
  (project No. 18-17-00240). Clarification of the geological structure of the massif was carried out at the
  expense of the State Task of the Ministry of Science and Higher Education of the Russian Federation (project
  No. 0721-2020-0041).
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 4
metadata.lang: -
metadata.name: dc.subject
metadata.value: subalkaline and alkaline magmatism
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Sm–Nd and Rb–Sr isotope geochronology
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: geochemistry
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: mantle plume
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: accretionary complex
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Kuznetsk Alatau
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Isotope-geochemical (Sm–Nd, Rb–Sr, REE, HFSE) composition of the University foidolite-gabbro pluton, Kuznetsk Alatau ridge, Siberia
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 681-701.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/23889/1/681-701.pdf
resources.format: Adobe PDF
resources.size: 4,33 MB