title: Th—U—Pb-dating of monazite from the metamorphic rocks of the Itkul formation of the Sysert Complex (Middle Urals)
metadata.name: dc.contributor.author
metadata.value: Ponomarev, Vladimir S.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Khiller, Vera V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Erokhin, Yuriy V.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2019-08-28T13:17:22Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2019-08-28T13:17:22Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2019-06
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Ponomarev, V. S., Khiller, V. V., Erokhin, Y. V. (2019). Th—U—Pb-dating of monazite from the metamorphic rocks of the Itkul formation of the Sysert Complex (Middle Urals). Vestnik of Saint Petersburg University. Earth Sciences, 64 (2), 315–327.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2019.209
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/16179
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: New data were obtained on the age of metamorphism of the rocks of the Itkul formation of the Sysert Metamorphic Complex (Middle Urals). Amphibole-chlorite rocks from the Glubochinskoye deposit of the garnet were studied, which was partially worked by several mines. The investigated rocks are composed of chlorite (clinochlore), amphibole (sodic-ferrozhedrite, sodic-zhedrit), garnet (Alm78-65), staurolite, plagioclase (An4-18), ilmenite, fluorapatite and monazite-(Ce). We performed a microprobe study of the chemical composition of monazite and determined the age of the mineral using the Th—U—Pb dating method. The age of the monazite is from 273 to 314 Ma, a weighted average of 297 ± 12 Ma and isochrone of 293 ± 26 Ma (MSWD = 0.23). The age of accessory monazite shows that the formation of amphibole-chlorite rocks occurred in the early Permian times. Probably, the transformation of metamorphic rocks in the northern part of the Sysert metamorphic complex occurred at the Permian and Carboniferous boundary under the influence of a powerful thermal event. At present, this is the subject of discussions. Some researchers believe that metamorphic rocks were formed as a result of a thermal event associated with suprasubduction tonalite-granodiorite magmatism, while others posit that the Sysert complex was formed as a suprasubduction accretion prism.
metadata.lang: en_GB
metadata.name: dc.description.sponsorship
metadata.value: Работа выполнена в рамках темы № 0393-2016-0019 государственного задания ИГГ УрО РАН.
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 64; Issue 2
metadata.lang: -
metadata.name: dc.subject
metadata.value: chemical dating
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: monazite
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: metamorphic rocks
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Itkul formation
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Sysert Metamorphic Complex
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Glubochinskoye deposit
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Middle Urals
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Th—U—Pb-dating of monazite from the metamorphic rocks of the Itkul formation of the Sysert Complex (Middle Urals)
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 315-327.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/16179/1/315-327.pdf
resources.format: Adobe PDF
resources.size: 1,83 MB