title: Tectonics of the New Siberian Islands archipelago: Structural styles and lowtemperature thermochronology
metadata.name: dc.contributor.author
metadata.value: Худолей, Андрей Константинович
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-09-08T16:10:07Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-09-08T16:10:07Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2018
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/19274
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Tectonic evolution of the New Siberian Islands (NSI) has been revealed based on detailed structural investigations
  and a (U-Th)/He low-temperature thermochronologic study of detrital zircons (ZHe) and apatite (AHe).
  Our study supports models claiming a non–Siberian affinity of the NSI and furthermore suggests that the study
  area formed a part of the Arctic-Alaska-Chukotka microcontinent. Seven stages of deformation have been revealed.
  The earliest stage (Stage 1) involved contractional deformation with transport directions towards the Wto
  WSW and occurred during the Late Cambrian across the De Long Islands. The next episode of deformation
  (Stage 2) has been revealed based on the low-temperature thermochronology (ca. 378–414 Ma, ZHe) and
  structural data. A pre-Frasnian angular unconformity formed as a result of Stage 2 deformation on Kotel’nyi
  Island, which involved contractional deformation with S-to SW transport directions (modern coordinates) in the
  mid-Paleozoic. In the latest Early Cretaceous–Late Cretaceous, three deformation stages were initiated by collision
  between the western part of the Arctic-Alaska-Chukotka microcontinent and Siberia, forming the South
  Anyui suture zone and overlapping orogenic belt. Stage 3 was characterized by the formation of major NWtrending
  folds, thrusts, and both transfer dextral and sinistral strike-slip faults with a reverse component. During
  Stage 4, the Arctic Alaska-Chukotka microcontinent moved westward. On Bolshoy Lyakhovsky Island, sinistral
  strike-slip faults were formed, whilst E-W compression took place across the Anjou islands. In Stage 5, the Arctic
  Alaska-Chukotka microcontinent shifted southward, forming a series of N-S-trending dextral strike-slip faults.
  The ZHe and AHe ages (ca. 93–125 Ma) suggest that these deformation events were associated with significant
  uplift in the western part of the NSI (Kotel’nyi and Bel’kovsky islands), whilst the eastern part (De Long Islands)
  was marginally affected by these events without significant uplift. The Cenozoic extension event (Stage 6)
  corresponds to the opening of the Eurasian Basin. This stage is manifested by the cooling episode (ca. 53 Ma,
  Early Eocene, AHe) established in the eastern part of the NSI (Jeannette Island). The origins of the late Cenozoic
  contractional deformations described from the Cenozoic deposits of the Anjou Islands (Stage 7) are unclear, but
  were possibly caused by movements along the Eurasian and North-American lithospheric plates.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: Elsevier
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Tectonics of the New Siberian Islands archipelago: Structural styles and lowtemperature thermochronology
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: Prokopiev-et-al-2018-GD.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/19274/1/Prokopiev-et-al-2018-GD.pdf
resources.format: Adobe PDF
resources.size: 19,6 MB