10.1594/PANGAEA.983405Zeng, ZhiweiZhiweiZengTongji UniversityDang, HaowenHaowenDang0000-0002-1320-4761Tongji UniversityZhang, HongruiHongruiZhang0000-0003-1782-5976Tongji UniversityBao, ZhianZhianBaoNorthwest UniversityYu, XunXunYuTongji UniversityLi, ChenChenLi0000-0002-0721-9182Tongji UniversityBu, MingyuanMingyuanBuTongji UniversityZhang, PengPengZhang0000-0003-0472-5626Northwest UniversityZhou, XiaoliXiaoliZhou0000-0001-8221-9548Tongji UniversityJian, ZhiminZhiminJianTongji UniversityPANGAEA2025cold-water octocoralMg/CaMg isotopesEvent labelLatitude of eventLongitude of eventDate/Time of eventSample code/labelDistanceStructureδ26Mgδ26Mg, standard deviationδ25Mgδ25Mg, standard deviationMagnesium/Calcium ratioBoron/Calcium ratioStrontium/Calcium ratioBarium/Calcium ratioHuman Occupied VehicleMultiple collector inductively-coupled plasma mass spectrometerLaser Ablation Inductively Coupled Mass SpectrometerST03TS12-02TS2-1-3Tansuo-22018-05-13T12:05:00/2020-08-25T15:42:00Dataset10.1594/PANGAEA.983404121 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalData access is restricted (moratorium, sensitive data, license constraints)The data in this sheet present magnesium isotopic composition obtained from micro-drilled powder samples of cold-water corals analyzed by multiple collector inductively coupled plasma mass spectrometry (MC-ICP-MS) and corresponding elemental compositions by laser ablation inductively coupled plasma (LA-ICP-MS). Micro-drilling was performed across distinct growth stages in three specimens to investigate how Mg isotopic variations reflect magnesium incorporation mechanisms in different growth structures. Sampling position represents each measurement point's distance relative to the growth central axis.110.71117.1216.5517.64