INFOMAR Seabed Sediment Samples Granulometry

INFOMAR Seabed Samples Particle Size Analysis represent locations where samples have been taken and particle size analysis (PSA) carried out on samples. PSA is applied to determine the range of sediment sizes contained in the sample. These size classes can then be grouped into mud, sand and gravel on the basis of their diameter with the boundary between mud and sand size grains at 63µm (0.063mm) and the boundary between sand and gravel size grains at 2mm. The relative proportion of the grains in the three categories is then used to classify the sediment present in the sample. The Folk Classification scheme has 15 classes to describe the sediment. Gradistat software was used to classify the PSA output for each sediment sample into a Folk sediment class and to provide information on the sorting and metrics for the mode and D50. None

INFOMAR 海底样本粒度分析数据集记录了已开展沉积物样本采集与粒度分析（Particle Size Analysis, PSA）的相关站位。粒度分析用于测定样本内沉积物的粒径分布范围。依据颗粒直径，可将各类粒级划分为泥、砂与砾石三类：泥质颗粒与砂质颗粒的粒径分界为63μm（0.063mm），砂质颗粒与砾石颗粒的粒径分界为2mm。随后通过三类颗粒的相对占比对样本中的沉积物进行分类。福克沉积物分类体系（Folk Classification scheme）共设有15个粒类，用于描述沉积物类型。本研究使用Gradistat软件，将每份沉积物样本的粒度分析结果归类至福克沉积物类别中，并提供粒度分选性、众数参数及D50参数等相关信息。