Reconstruction géologique et géochronologique de la vallée de la Cagayan (île de Luzon, Philippines)

The complex geodynamic context of the Pacific Ring of Fire has generated, since the Oligocene, the formation of numerous volcanic structures and sedimentary units, including the island of Luzon, which has 141 volcanoes, about 20 of which are still active. To the north of this Philippine island, the Plio-Pleistocene fill of the Cagayan sedimentary basin, bordered by two volcanic-derived orogenic chains, recorded the earliest evidence of human occupation about 700,000 years ago at the Kalinga site (Ingicco et al., 2018, Nature). This is one of the three oldest traces of human presence in the world in an insular context. To date, very few studies concerning the sedimentary record and contemporary volcanism of this human occupation (sedimentology, dating, paleoenvironment) are available. The study of this area is therefore crucial for the understanding of human evolution in Asia.This thesis aims to date, synchronise and correlate multiple geological (volcanic, sedimentary, palaeoenvironmental) and archaeological archives in order to establish a temporal framework for the overall context of the valley. To this end, a multi-method approach will be implemented (40Ar/39Ar, ESR, U-Pb).