Uranium-Thorium dating of authigenic carbonates and shells from Yam Seep, South China Sea@en

This data presents high precision Th/U ages from seep carbonates obtained from a 5-meter-long rock core (GeoB 23225-1, MeBo24) collected by the sea floor drill rig MARUM-MeBo200 in Yam Seep, SW offshore Taiwan during SO266, RV Sonne. The dating results provide records of over 40 thousand years old gas seepage and an unconventional precipitation sequence throughout the 5-meter downcore. The oldest age presents at ~192 cmbsf and the youngest age at the lower end of the core (~490 cmbsf). It provides insights into gas seepage episodes at active margin as well as precipitation sequences influenced by fracturing. Uranium and thorium isotope measurements were performed at the Institute of Environmental Physics multi-collector ICPMS facility in Heidelberg, which hosts a ThermoFisher Neptuneplus MC-ICPMS following the method of Wefing et al., (2017) and Frank and Hemsing (2021). […]本数据集包含采自台湾西南外海雅冷泉（Yam Seep）的冷泉碳酸盐岩高精度Th/U年龄数据。样品取自“索恩号”（RV Sonne）科考船SO266航次期间，由海底钻探平台MARUM-MeBo200获取的5米长岩芯（GeoB 23225-1、MeBo24）。本次测年结果记录了该5米岩芯全剖面范围内超过4万年的天然气渗流活动，以及一套非常规的碳酸盐沉淀序列。最老的年龄出现在约192 cmbsf处，最年轻的年龄则位于岩芯底端（约490 cmbsf）。该数据集可为活动大陆边缘的天然气渗流事件以及受断裂作用影响的碳酸盐沉淀序列研究提供科学参考。铀钍同位素测试工作在海德堡环境物理研究所的多接收器电感耦合等离子体质谱（multi-collector ICPMS）实验室完成，该实验室配备赛默飞世尔（ThermoFisher）Neptuneplus MC-ICPMS，测试方法遵循Wefing等人（2017）以及Frank与Hemsing（2021）的研究方案。[...]