Thermochronology and <scp>U–Pb</scp> dating of detrital zircons from the Demerara Plateau (French <scp>Guiana‐Suriname</scp> ): Implications for the provenance of the Early Cretaceous syn‐rift sedimentation

The provenance of Early Cretaceous sandstones dredged on the northern margin Demerara Plateau, offshore French Guiana and Suriname, reveals sediment routing system that prevailed through Equatorial Atlantic rifting. Fission-track analysis U–Pb dating 310 111 detrital zircons, respectively, have been performed. Microfacies inherited cooling ages suggest were deposited in shallow marine environments during Cretaceous, before Late Albian drowning marginal plateau. Most zircon crystallisation are comprised between 700 600 Ma attributed to Pan-African-Brasiliano orogeny. Statistical chronological evidence fission-track from source materials. Triassic peak (>50% population) early phase Central One sample records a at ca. 170 Ma, presumably following volcanic hotspot activity opening Ocean. Two other samples record rapid exhumation transform rifting (127 ± 11 106 8 Ma). We propose source-to-sink model which basement was eroded as result flexural uplift along margin, material funnelled Cacipore graben sustained syn-rift sedimentation