Particle-size distributions of Pliocene sediment from IODP Site U1359

This dataset contains measurements of terrigenous particle-size distributions on Pliocene sediment from Integrated Ocean Drilling Program Site U1359 on the Wilkes Land margin. Biogenic silica, carbonate, and organic matter were removed through addition of 10mL aliquots of 30% H2O2, 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate, and after supernatant was removed, digestion in 0.2 N NaOH at ~85 degrees for 1 hour. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive index of 1.6 (Illite) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.

本数据集涵盖威尔克斯陆缘（Wilkes Land margin）综合大洋钻探计划（Integrated Ocean Drilling Program）U1359站位上新世沉积物的陆源颗粒粒度分布测量数据。样品中的生物硅、碳酸盐与有机质通过以下流程去除：向约50~100 mL的悬浮液中分次加入10 mL 30%过氧化氢、2 mL 10%盐酸，并置于电热板上加热；待上清液移除后，将样品置于约85℃的0.2 N氢氧化钠溶液中消解1小时。随后采用焦磷酸钠加热法完成颗粒分散。样品使用搭载Hydro 2000MU（A）附件的马尔文Mastersizer 2000粒度仪进行测试，测试时采用伊利石（Illite）的折射率1.6与吸收系数0.9。测试结果以各粒径级的体积百分比（vol. %）呈现，粒径范围等效于与被测颗粒体积相同的球体直径。