Global Oceanic Rubidium Budget and Isotopic Composition: Evidence from Pelagic and Continental Margin Sediment Outputs

The Source Data present comprehensive measurements of mineralogical components, major-element concentrations, and Rb contents along with isotope compositions for sediments from the South China Sea (WS core and surface samples) and the western Pacific Ocean (core GC112). Second, δ87Rb values of suspended particulate matter from the lower Xijiang River. Additionally, the calculated isotopic signatures of the authigenic Rb fraction within continental margin sediments are reported. To establish a global perspective, the datasets incorporate regional surface areas and statistical parameters employed to estimate global authigenic Rb fluxes（Table S1-6）. This primary dataset is supplemented by a broader geochemical framework in the Supplementary Tables, which compile major-element and Rb data for global continental margins and deep-sea sediments (Supplementary Table S1-2), sedimentation rates across diverse continental margin regions (Supplementary Table S3）.本源数据集涵盖了南海（WS岩芯及表层沉积物样品）与西太平洋（GC112岩芯）沉积物的矿物组分、主量元素浓度、铷（Rb）含量及其同位素组成的全套测量数据。其次，本数据集包含西江下游悬浮颗粒物的δ87Rb同位素值。此外，本数据集还提供了大陆边缘沉积物中自生铷组分的计算同位素特征数据。为建立全球视角下的研究框架，本数据集纳入了用于估算全球自生铷通量的区域面积与统计参数（表S1-6）。本原始数据集辅以补充表中收录的更为全面的地球化学数据集：其中补充表S1-2汇总了全球大陆边缘与深海沉积物的主量元素及铷数据，补充表S3收录了不同大陆边缘区域的沉积速率数据。