Abstract
The three piston cores, collected from the East Sea, were analyzed to detect changes of sedimentary environment during the late Quaternary. The cores consist mainly of muddy sediments that are interbedded with silty sands, lapilli and ash layers. The so-called dark laminated mud (DLM) layers are found during the last-glacial and interglacial transition. The geochemical results document that the DLM layers are enriched in Fe relative to Mn. Fe is present as a form of framboidal pyrite, which shows a proportion of about 2∶1 for S and Fe. Based on the morphology, the pyrites are regarded to have grown in the transitional state between high and low supersaturations of Fe and S. Furthermore, the framboidal size distribution implies that the DLM layers have deposited in euxinic environments.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.