INFOMAR Sediment Grab Samples

A sample grab is a sample of sediment taken from the seabed. This is a sediment sample database of samples collected to date by INSS, INFOMAR and related projects. They include ADFish, DCU, FEAS, GATEWAYS, imagin, IMES, INIS_HYRDO, JIBS, MESH, SCALLOP, SEAI, UCC. Each sample point has some information recorded during collection including location, sample ID and preliminary description. Where available the shapefile also shows the results of partical size analysis (PSA) carried out on samples from 2004. PSA groups grains into mud, sand and gravel on the basis of their diameter. The relative proportion of the grains in the three categories is given as a percentage and used to Classify the sample using the Folk Classification scheme. This analysis is also used to determine if the sample is well or poorly sorted. The database contains information (where available) on:YEAR, SURVEY, VESSEL, SAMPLE_ID, sampler, DATE, TIME, LAT, LONG, depth, RECOVERY, DSCRIPTION, comment, REPORT, MUD, SAND, gravel, PSA_DSCRPT, FOLK_CLASS, SOURCE, IMAGE.

抓斗采泥样品（sample grab）指从海底采集的沉积物样本。本数据库为INSS、INFOMAR及相关项目迄今采集的沉积物样本库，涵盖ADFish、DCU、FEAS、GATEWAYS、imagin、IMES、INIS_HYRDO、JIBS、MESH、SCALLOP、SEAI、UCC等项目的采集样本。每个采样点位均记录了采集过程中的相关信息，包括采样位置、样本编号及初步描述。若数据可用，该形状文件（shapefile）还将展示2004年采集样本的粒度分析（Particle Size Analysis, PSA）结果。粒度分析依据颗粒直径将沉积物颗粒划分为泥质、砂质与砾石三类，三类颗粒的相对占比以百分比形式呈现，并将基于该占比通过福克分类体系（Folk Classification scheme）对样本进行分类。该分析结果还可用于判断样本的颗粒分选性优劣。本数据库收录（若有）以下信息：年份（YEAR）、调查航次（SURVEY）、调查船（VESSEL）、样本编号（SAMPLE_ID）、采样器（sampler）、采集日期（DATE）、采集时间（TIME）、纬度（LAT）、经度（LONG）、水深（depth）、采样回收率（RECOVERY）、样本描述（DSCRIPTION）、备注（comment）、分析报告（REPORT）、泥质占比（MUD）、砂质占比（SAND）、砾石占比（gravel）、粒度分析描述（PSA_DSCRPT）、福克分类结果（FOLK_CLASS）、数据来源（SOURCE）及样本图像（IMAGE）。