In-situ δ18O and 87Sr/86Sr proxies in an unconformable clastic unit at the Ordovician–Silurian transition

• Published in: Scientific reports Vol. 13; no. 1; pp. 15174 - 11
• Main Authors: Park, Chaewon, Song, Yungoo, Kim, Namsoo, Choi, Sung-Ja, Chwae, Ueechan, Jang, Yirang, Kwon, Sanghoon, Kim, Jeongmin, Kim, Ha, Jeong, Youn-Joong
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 13-09-2023; Nature Publishing Group; Nature Portfolio
• Subjects: 704/2151/209; 704/2151/213; 704/2151/330; 704/2151/3930; 704/2151/431; 704/2151/562; Archives & records; Continental margins; Geology; Glaciers; Humanities and Social Sciences; Isotopes; Minerals; multidisciplinary; Ordovician; Paleozoic; Provenance; Science; Science (multidisciplinary); Silurian; Stratigraphy
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-023-42200-3

Clastic successions found in the carbonate platform of continental margin during the Ordovician–Silurian Transition (OST) period are archives for interpreting paleo-depositional systems. Here, we report in-situ δ
18
O
quartz
and
87
Sr/
86
Sr
carbonate
isotope chemo-stratigraphy for an unconformable clastic unit from the Cathaysia terrane that rifted off the Gondwana Supercontinent in the Early Paleozoic Era. Our results suggest a depositional proxy and model for geological events attributed to rapid changes in the sedimentary environment during the OST period. Importantly, these results present crucial clues that infer the influence of Paleo-Tethys Sea opening, global eustatic regression, and rapid sedimentary provenance change. Our study provides insight into paleo-tracer that could be a key method for interpreting depositional system of carbonate platform based on in-situ mineral isotope chemo-stratigraphy that preserves the original value of provenance and geochemical condition.