The major and rare earth elements content of fish teeth from REE-rich mud, Pacific

The samples are from DY54 and DY70 voyage in western Pacific and CCFZ. The detailed sample location can be found in the excel file (sheet 4).The data were abtained by EPMA and LA-ICPMS, including "The major and trace elements compositions of coarse-grained fish teeth"(sheet 1), "The major and trace elements compositions of fine-grained fish teeth."(sheet 2) and data of Standards(Sheet 3).The major element contents of fish teeth were obtained at the Key Laboratory of Submarine Geosciences, Ministry of Natural Resources using the JXA-8100 EPMA equipped with four wavelength-dispersive spectrometers (WDS) and one energy-dispersive spectrometer (EDS) at an accelerating voltage of 15 kV, a beam diameter of 10 μm, and a beam current of 20 nA. The detection limits for most major elements analyzed in fish teeth were 0.03 wt.%.The Analyte Excite 193 nm ArF excimer laser ablation system from Teledyne Cetac Technologies and the Agilent 7700x quadrupole ICP-MS from Agilent Technologies at Nanjing FocuMS Technology Co. Ltd was used for the LA-ICP-MS analysis to obtained the REE concentrations of fish teeth. The element quantification was based on the "standard-free matrix normalization method" (Liu et al., 2008), which is suitable for samples with similar matrix types, to improve the accuracy and consistency of element quantification. The NIST SRM 612 and SRM 610 standard glasses were used as external standards, and the USGS basalt standards BCR-2G, BHVO-2G, BIR-1G, as well as the REE-rich apatite reference material (Durango), were also applied for quality control. The result of Durango is consistent with the published result, which excludes the possible error in LA-ICP-MS analysis produced by relatively low REE contents in SRM 612 and SRM 610. The results of fish teeth were calibrated using Ca content from EPMA.

本数据集样本来源于西太平洋及克拉里昂-克里帕顿断裂带（CCFZ）的DY54与DY70航次，样本的详细位置信息可参见Excel文件的第4工作表（sheet4）。数据通过电子探针显微分析（EPMA）和激光剥蚀电感耦合等离子体质谱（LA-ICPMS）获取，包含三个工作表："粗粒鱼牙的主量与微量元素组成"（sheet1）、"细粒鱼牙的主量与微量元素组成"（sheet2）及"标准物质数据"（sheet3）。鱼牙的主量元素含量由自然资源部海底科学重点实验室采用JXA-8100型电子探针显微分析（EPMA）仪器测定；该仪器配备4台波长色散谱仪（WDS）与1台能量色散谱仪（EDS），分析参数为：加速电压15kV、束斑直径10μm、束流20nA。鱼牙中多数主量元素的检测限为0.03重量百分比（wt.%）。鱼牙的稀土元素（REE）浓度通过激光剥蚀电感耦合等离子体质谱（LA-ICPMS）分析测定，实验在南京福克曼斯科技有限公司完成，所用仪器为Teledyne Cetac Technologies的Analyte Excite型193nm ArF准分子激光剥蚀系统与Agilent Technologies的7700x型四极杆电感耦合等离子体质谱仪（ICP-MS）。元素定量采用"无标样基体归一化法"（Liu等，2008），该方法适用于基体类型相似的样品，可提升元素定量的准确性与一致性。外部标准采用美国国家标准与技术研究院（NIST）的SRM 612和SRM 610标准玻璃；质量控制则使用美国地质调查局（USGS）的玄武岩标准物质BCR-2G、BHVO-2G、BIR-1G，以及富稀土元素（REE）的磷灰石标准物质Durango。Durango标准物质的分析结果与已发表数据一致，这排除了因SRM 612和SRM 610中稀土元素（REE）含量相对较低而可能导致的激光剥蚀电感耦合等离子体质谱（LA-ICPMS）分析误差。鱼牙的分析结果通过电子探针显微分析（EPMA）获得的钙（Ca）含量进行校准。