Multiple garnet growth in garnet–kyanite–staurolite gneiss, Pangong metamorphic complex, Ladakh Himalaya: New constraints on tectonic setting

Tectonics and Evolution of the Trans-Himalayan Mountains and Nagaland Ophiolite Belt

“…Research publications by Thanh et al (2011) and Van Buer et al (2015) deal mainly with evolution of the Karakoram metamorphics in extreme northern parts along the Tangste and Shyok valleys of Karakoram Mountains. In the Pangong metamorphic complex, garnet-kyanite-staurolite gneiss contains porphyroblastic euhedral garnets, kyanite blades and resorbed staurolite, surrounded by muscovite-biotite matrix, associated with a leucogranite layer (Thanh et al, 2011).…”

“…In the Pangong metamorphic complex, garnet-kyanite-staurolite gneiss contains porphyroblastic euhedral garnets, kyanite blades and resorbed staurolite, surrounded by muscovite-biotite matrix, associated with a leucogranite layer (Thanh et al, 2011). Two generations of garnet in cores and rims represent two stages of metamorphism with rich Mn (XSps=0.35-0.38 and poor Fe (XAlm=0.40-0.45) garnet cores, whereas rims have reverse patterns.…”

“…Two generations of garnet in cores and rims represent two stages of metamorphism with rich Mn (XSps=0.35-0.38 and poor Fe (XAlm=0.40-0.45) garnet cores, whereas rims have reverse patterns. Thanh et al (2011) have suggested that garnet cores formed during prograde metamorphism in a subduction zone, followed by abrupt exhumation during early collision of the Ladakh arc and Karakoram block. Garnet rims overgrew the Mn-rich cores at ca.…”

Metamorphic P – T conditions and CO 2 influx history of medium-grade metapelites from Karakorum, Trans-Himalaya, India

“…Dating of monazite (Streule et al, 2009) provided Cretaceous age (108 ± 0.6 Ma) for the sillimanite-grade metapelites whereas staurolite grade metamorphism is considered to be younger, of Tertiary age, although the precise timing is not very well constrained. Earlier studies suggest this metamorphism as a result of shear heating under fault-guided magmatic advection within the KFZ (Rolland and Pêcher, 2001;Rolland et al, 2009;Valli et al, 2008;Thanh et al, 2009Thanh et al, , 2011. However an alternative explanation states that the metamorphism was the result of ongoing crustal thickening (Searle et al, , 2011Streule et al, 2009;Wallis et al, 2013Wallis et al, , 2014.…”

“…Lemennicier et al (1996) initially constrained structural-metamorphic evolution of the Karakorum metamorphic complex of central Karakorum region. Streule et al (2009) and Thanh et al (2011) reported two metamorphic events of Cretaceous and Tertiary age within the Karakorum Metamorphic Complex. Dating of monazite (Streule et al, 2009) provided Cretaceous age (108 ± 0.6 Ma) for the sillimanite-grade metapelites whereas staurolite grade metamorphism is considered to be younger, of Tertiary age, although the precise timing is not very well constrained.…”