Indus-Yarlung suture zone

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Map of the Himalya region. Green is the Indus-Yarlung suture zone
Cross section of the Himalya, the suture zone is shown in green
Location of Mt. Kailash. Indus-Yarlung Zangbo suture zone, the Yarlung Tsangpo River is sometimes called upper Brahmaputra River.

The Indus-Yarlung suture zone or the Indus-Yarlung Tsangpo suture is a tectonic suture in southern Tibet and across the north margin of the Himalayas which resulted from the collision between the Indian plate and the Eurasian plate starting about 52 Ma.[1] The north side of the suture zone is the Ladakh Batholith of the Karakoram-Lhasa Block. The rocks of the suture zone consist of an ophiolite mélanges composed of Neotethys oceanic crustal flyschs and ophiolites; the Dras Volcanics: which are basalts, dacites and minor radiolarian cherts - the remains of a mid to late Mesozoic volcanic island arc; and the Indus Molasse which are an Eocene or later continental clastic sediments.[2]

The Ophiolith which can be found here is not a remnant of a very big ocean, but of a small so called Back-arc basin structure.[3]

See also[edit]

References[edit]

  1. ^ Age of Initiation of the India-Asia Collision http://geosci.uchicago.edu/~rowley/Rowley/Collision_Age.html
  2. ^ Dèzes, Pierre, 1999, Major tectonic subdivisions of the Himalaya http://comp1.geol.unibas.ch/~zanskar/CHAPITRE2/page24.html
  3. ^ É. Bédard, R. Hébert, C. Guilmette, G. Lesage, C.S. Wang, J. Dostal, Petrology and geochemistry of the Saga and Sangsang ophiolitic massifs, Yarlung Zangbo Suture Zone, Southern Tibet: Evidence for an arc–back-arc origin, Lithos, Volume 113, Issues 1–2, November 2009, Pages 48-67, ISSN 0024-4937, 10.1016/j.lithos.2009.01.011. (http://www.sciencedirect.com/science/article/pii/S0024493709000309) Keywords: Ophiolites; Yarlung Zangbo Suture Zone; Geochemistry; Mantle refertilization