The Tectonics and Paleo-drainage of the Easternmost Himalaya (Arunachal Pradesh, India) Recorded in the Siwalik Rocks of the Foreland Basin.

International audienceThe Siwalik sedimentary rocks of the Himalayan foreland basin preserve a record of Himalayan orogenesis, paleo-drainage evolution, and erosion. This study focuses on the still poorly studied easternmost Himalaya Siwalik record located directly downstream of the Namche Barwa syntaxis. We use luminescence, palaeomagnetism, magnetostratigraphy, and apatite fission-track dating to constrain the depositional ages of three Siwalik sequences: the Sibo outcrop (Upper Siwalik sediments at ca. 200-800 ka), the Remi section (Middle and Upper Siwalik rocks at ca. 0.8-6.6 Ma), and the Siang section (Middle Siwalik rocks at ca. <9.3±1.5 to