Elemental and Sr-Nd isotopic geochemistry of Mesoproterozoic sedimentary successions from NE Lesser Himalaya, northern India: Implications for Proterozoic climate and tectonics

•Mesoproterozoic sediments of NE-Himalaya were not derived from Peninsular cratons.•Inner Lesser Himalayan terrain is likely source for Bomdila and Rupa Group of sediments.•Warm and humid paleoclimatic conditions prevailed in the source region.•Proterozoic sequences of NE-Himalaya were part of a long lived orogenic belt.