Strontium isotope proxy of sedimentological records reveals uplift and erosion in the Southeastern Neo-Tethys ocean during the late Cretaceous.

ABSTRACT: The mutual interplays between plate tectonic processes, orogenesis and continental uplift, high-flux magmatism, and high sedimentation rates can affect the geochemical signatures and composition of marine sediments. Here, we examine two major disconformities, the Cenomanian-Turonian boundary (CT-ES) and the middle Turonian (mT-ES) exposure surfaces, from the Upper Cretaceous sedimentary successions of the southeastern Neo-Tethys Ocean in the Zagros Basin (Iran). The disconformities are expressed as distinct positive peaks in rubidium (Rb) contents and ⁸⁷Sr/⁸⁶Sr isotopic ratios of carbonates. The ⁸⁷Sr/⁸⁶Sr values of samples bracketing the disconformities in seven well cores give average age ranges of 94.4-93.6 Ma for the CT-ES and 91-86 Ma for the

SUBMITTER: Navidtalab A 

PROVIDER: S-EPMC10861479 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature