title: The Southern Tian-Shan: Upgrading the geologic synthesis
metadata.name: dc.contributor.author
metadata.value: Biske, Yuriy S.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2019-04-01T16:14:27Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2019-04-01T16:14:27Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2018-12
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Biske Y. S. The Southern Tian-Shan: Upgrading the geologic synthesis. Vestnik of Saint Petersburg University. Earth Sciences, 2018, vol. 63, issue 4, pp. 416–462.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: 10.21638/spbu07.2018.403
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/15416
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: New geological results concerning the 2500 km length Southern Tian-Shan (STS) Late Paleozoic
  collisional belt are revised. The STS basement consists mainly of Proterozoic continental
  crust fragments. Precambrian terrains of the STS immediate environment (Ishim-Naryn
  microcontinent with its Middle Tian-Shan outcrop, Central Tian-Shan, Karakum-Tajik,
  Tarim) as well as presumed blocks inside the STS belt (Kyzylkum-Alay etc.) embrace the
  ancient Precambrian crust of ca. 2700–1800 Ma and its parts that were reworked and converged
  in the Late Proterozoic (900–600 Ma) active margin. The STS orogenic belt in the
  Turkestan ocean had emerged not later than 750 Ma in the Kyzylkum segment; before the
  Middle Ordovician in the central segment between Tarim and Central TS terrains; not later
  than Late Ordovician in the eastern (Chinese) segment. Active margins or Paleozoic island
  arc magmatism started in the Late Ordovician and developed in the Silurian — Early Devonian.
  Passive margin sedimentation in Devonian to Early Carboniferous expands thanks to
  intraplate basalt or bimodal volcanism. The general convergence with some back-arc rifting
  and spreading resumed in Visean and completed with continental collision in the Late Carboniferous.
  The great Bukantau — Kokshaal — Halyktau top-to-the-south thrust belt is the
  most expressive result of the collision, despite the fact that some top-to-the-north thrusts,
  both earlier and later, are also known. The Mississippian and Early Pennsylvanian magmatism
  of the active Kazakhstan margin as well as HP-UHP metamorphism emerged in the
  northern flank of the STS suture in the rear position to the main thrust belt direction. This
  active margin is better-presented in the western STS segment and implies greater volume of
  the ocean space consumed here. The Early Permian post-collisional magmatism of the STS
  and its frame, 290–270 Ma at its peak, presents a variety of granitoids, alkali rocks and also
  basalts with some ultrabasites. Among them are Rapakivi-type A-granite magmas that intruded
  the marginal (lower) part of the Kokshaal-Halyktau thrust continuity and expanded
  the Tarim margin in the unusual frontal position. This could be the result of Tarim mantle
  plum impact. In the Central Asian Orogenic Belt, well manifested alpine-type structure of
  STS, as much as poor persistence of ophiolites, absence of primitive arcs, keep the STS aside
  of accretionary “Altaids” such as the Eastern Kazakhstan or Junggar margin of the same
  Tian-Shan mountains.
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 63; Issue 4
metadata.lang: -
metadata.name: dc.subject
metadata.value: Southern Tien Shan
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Paleozoic
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Precambrian crust
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: ophiolites
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: suprasubduction magmatism
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: collisional magmatism
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: metamorphic complexes
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Tarim plume
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: The Southern Tian-Shan: Upgrading the geologic synthesis
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 03-Biske.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/15416/1/03-Biske.pdf
resources.format: Adobe PDF
resources.size: 6,86 MB