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Geologische Rundschau

, Volume 85, Issue 4, pp 705–722 | Cite as

A traverse through the western Kunlun (Xinjiang, China): tentative geodynamic implications for the Paleozoic and Mesozoic

  • F. Mattern
  • W. Schneider
  • Y. Li
  • X. Li
Original Paper

Abstract

The northern part of the western Kunlun (southern margin of the Tarim basin) represents a Sinian rifted margin. To the south of this margin, the Sinian to Paleozoic Proto-Tethys Ocean formed. South-directed subduction of this ocean, beneath the continental southern Kunlun block during the Paleozoic, resulted in the collision between the northern and southern Kunlun blocks during the Devonian. The northern part of the Paleo-Tethys Ocean, located to the south of the southern Kunlun, was subducted to the north beneath the southern Kunlun during the Late Paleozoic to Early Mesozoic. This caused the formation of a subduction-accretion complex, including a sizeable accretionary wedge to the south of the southern Kunlun. A microcontinent (or oceanic plateau?), which we refer to as “Uygur terrane,” collided with the subduction complex during the Late Triassic. Both elements together represent the Kara-Kunlun. Final closure of the Paleo-Tethys Ocean took place during the Early Jurassic when the next southerly located continental block collided with the Kara-Kunlun area. From at least the Late Paleozoic to the Early Jurassic, the Tarim basin must be considered a back-arc region. The Kengxiwar lineament, which “connects” the Karakorum fault in the west and the Ruogiang-Xingxingxia/Altyn-Tagh fault zone in the east, shows signs of a polyphase strike-slip fault along which dextral and sinistral shearing occurred.

Key words

China Kunlun Kara-Kunlun Proto-Tethys Paleo-Tethys Kudi ophiolite Kengxiwar lineament Plate tectonics Accretion mylonites 

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • F. Mattern
    • 1
  • W. Schneider
    • 2
  • Y. Li
    • 3
  • X. Li
    • 3
  1. 1.Institut für Geologie, Geophysik und GeoinformatikFreie Universität BerlinBerlinGermany
  2. 2.Institut für GeowissenschaftenTechnische Universität BraunschweigBraunschweigGermany
  3. 3.Institute of Geology and Mineral ResourcesUrumqi, XinjiangChina

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