Depth and slope gradient of stations on which three types of surface sediments deposited on observed by drilling samples and TV camera on The Magellan seamounts

These data enclosed our manuscript entitled ‘Patterns of Surface Sediments Controlled by Slope Deformation on Seamounts’, which we have requested to consider for publication as an Original Article in Earth and Planetary Science Leters.These data formed the Figure 2 and 3 in the article. Two hundred five drilling shallow borehole samples on the four guyot slopes from The magellan seamounts. Forty-two of these are loose sediment (LS) on slopes with gradients between 0.4 and 5.5° that data shown in the file "LooseSediments(LS).CSV"; 132 are Cobalt-rich crusts(CS) on slopes of 3.5–37.3° that data shown in the file "CrustSediments(CS).CSV ", and 31 are ER on slopes of 15.1–43.7° that shown in the file "ExposedRocks(ER) .CSV". Slope gradients and depth were projected onto a scatter diagram, shown in Figure 2 Sixty one pictures were taken at the seafloor, of which six locations are shown in Figure 1c. Slope gradients and sample types are shown in Figure 3. The correlation between sediment types and slope gradients observed by TV video is consistent with the conclusion of Figure 2. Total 20 locations just as Pic3 and Pic6 show TS coverings between the slopes on which CS and LS are deposited, featuring brecciated rocks with some ferromanganese nodules and gravels. Slope at those locations have 3.8–6.0°gradient range, shown in Table4. Their data in the Excel file named "Vis1802"

本数据集配套的论文稿件题为《海山斜坡变形控制的表层沉积物分布模式》，我们已提请《地球与行星科学通讯（Earth and Planetary Science Letters）》考虑将其作为原创论文发表。本数据集对应论文中的图2与图3。本次数据集包含取自麦哲伦海山4座平顶海山（guyot）斜坡的205个浅层钻孔沉积物样品。其中42个为坡度介于0.4°~5.5°斜坡上的松散沉积物（loose sediment, LS），相关数据存储于文件"LooseSediments(LS).CSV"中；132个为坡度3.5°~37.3°斜坡上的富钴结壳（Cobalt-rich crusts, CS），数据存储于"CrustSediments(CS).CSV"文件；剩余31个为坡度15.1°~43.7°斜坡上的裸露岩石（exposed rocks, ER），对应数据存储于"ExposedRocks(ER).CSV"文件。斜坡坡度与水深的散点投影图展示于图2。本次研究共在海底采集了61张照片，其中6个采样点的照片展示于图1c。斜坡坡度与样品类型的对应关系展示于图3。通过水下电视视频观测得到的沉积物类型与斜坡坡度的相关性，与图2的结论一致。如图3与图6所示，共计20处采样点的斜坡间存在TS覆盖层，该区域以角砾岩为主要特征，伴生有部分铁锰结核与砾石，斜坡上沉积有富钴结壳与松散沉积物。这些采样点所在斜坡的坡度范围为3.8°~6.0°，相关参数列于表4，对应数据存储于名为"Vis1802"的Excel文件中。