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"Tectonic Evolution of the Shyok Suture in the Nubra Region, Ladakh Him" by Wanchese Mateusz Saktura

The Shyok Suture in Ladakh Himalaya represents a Late Cretaceous arc-continent collision that preceded the Paleogene continental collision between India and Eurasia. The Shyok Suture is identified by the presence of highly deformed ophiolitic and island arc rocks, which are remnants from the now extinct Mesotethys Ocean. This suture continues west into the Kohistan region in Pakistan and can also be correlated with the Bangong Suture in Tibet to the east. The Ladakh section of the suture is an important link between these regions, but correlations between ophiolite and magmatic arc rocks along the Himalaya were difficult due to a lack of robust isotopic ages in Ladakh. Therefore, the main objectives of this dissertation are to investigate the key formations from the Shyok Suture and provide new data that can enable terrane correlations along the Himalayan Orogen. This is a key step in determining the early assembly architecture of the Himalaya, before it was disrupted by a major crusta ....

Jammu And Kashmir , Himachal Pradesh , Mesotethys Ocean , Shyok Suture , Ladakh Himalaya , Late Cretaceous , Bangong Suture , Miocene Karakoram , Rc Magmatism ,

"Jurassic–Cretaceous arc magmatism along the Shyok–Bangong Suture of NW" by Wanchese M. Saktura, Solomon Buckman et al.

The Jurassic–Cretaceous Tsoltak Formation of the eastern borderlands of Ladakh Himalaya consists of conglomerates, sandstones and shales, and is intruded by norite sills. It is the oldest sequence of continent-derived sedimentary rocks within the Shyok Suture. It also represents a rare outcrop of the basement rocks to the voluminous Late Cretaceous–Eocene Ladakh Batholith. The Shyok Formation is a younger sequence of volcaniclastic rocks that overlie the Tsoltak Formation and record the Late Cretaceous closure of the Mesotethys Ocean. The petrogenesis of these formations, ophiolite-related harzburgites and norite sill is investigated through petrography, whole-rock geochemistry and U–Pb zircon geochronology. The youngest detrital zircon grains from the Tsoltak Formation indicate an Early Cretaceous maximum depositional age and a distinctly Gondwanan, Lhasa microcontinent-related provenance with no Eurasian input. The Shyok Formation has a Late Cretaceous maximum depositional age ....

Jammu And Kashmir , Mesotethys Ocean , Cretaceous Tsoltak Formation , Ladakh Himalaya , Late Cretaceous , Eocene Ladakh , Shyok Formation , Tsoltak Formation , Early Cretaceous , Trans Himalayan Batholith ,

"Late Jurassic Changmar Complex from the Shyok ophiolite, NW Himalaya: " by Wanchese M. Saktura, Solomon Buckman et al.

Abstract
The Shyok Suture in western Himalaya preserves a record of the opening and closure of the Mesotethys Ocean between the Shyok ophiolite and Karakoram terrane prior to the India-Eurasia collision. The formation age of the Shyok ophiolite was unknown, which impeded correlation with similar rocks along the Shyok Suture in Pakistan and corresponding sutures in Tibet. We report the first zircon U-Pb ages of a newly documented suite, here named the Changmar Complex. The Changmar Complex gabbronorite and plagiogranite yielded SHRIMP U-Pb zircon Late Jurassic ages of 159.4 ± 0.9 Ma and 151.9 ± 1.5 Ma. Their highly positive initial ÎHf values (+14.9 to +16.9) indicate a juvenile mantle origin, without continental crust influence on the magma source. The Shyok ophiolite represents either: (1) a separate island arc that preceded formation of the Cretaceous-Eocene Ladakh Arc; or (2) the oldest magmatism and early stage of the Ladakh Arc. Intrusive and extrusive mafic rocks from ....

Jammu And Kashmir , Himachal Pradesh , Matum Das , Northern Areas , Mesotethys Ocean , Shyok Suture , Changmar Complex , Late Jurassic , Cretaceous Eocene Ladakh Arc , Late Jurassic Matum Das , Kohistan Arc , ஜம்மு மற்றும் காஷ்மீர் , இமாச்சல் பிரதேஷ் , வடக்கு பகுதிகள் , தாமதமாக ஜுராசிக் ,