... especially along the Siyom river valley ( Jain et al, 1974 ; Santra, 1979; Singh and Dey, 1989 ; Nandini and Thakur, 2011 ; Goswami and Baruah, 2016 ; Clarke et al., 2016 ). Continental collision between Indian and Asian plates (~50-60Ma ago) was followed by intense deformation, remobilisation...

... Indian plate margin and its accumulation in a fore-arc basin ( Singh et al., 2021 ) ( Fig. 3 ) is envisaged. Fig. 4. Field photographs. (a) Thick hornblende schist with intercalations of quartzite (meta-chert) - Ithum Formation, near Ithun River bridge, Dibang valley. (b) Schematic view...

... ( Acharyya, 2007 ; Misra, 2009 ), which may explain the additional, smaller component of older ages around 43 Ma (see discussion in subsequent section). The Siyom River has a clearly defined 16 Ma age component sourced from Greater Himalayan Crystalline rocks within the drainage area. This age component...

... ). In the easternmost Himalaya along the Siang River Valley, the Main Central thrust splits into two thrusts referred to as the MCT-I and MCT-II by Nandini and Thakur (2011) ( Fig. 2 ). The THS above the South Tibetan detachment consists of pre-Triassic metasedimentary strata ( Zeng et al., 2011 ) and Triassic...