<b>A comprehensive grain-size database of surface sediments from the Taklamakan Desert</b>

The database consists of three Excel files: files 1, 2, and 3 describe the grain-size characteristics of sediments from the Taklamakan Desert, with the second and third files derived from calculations based on the data in file 1.<b>File 1:</b> Grain Size Database of Sediments from the Taklamakan DesertSpecifically, File 1 contains the following data fields: 1) geomorphic type, including mobile dunes, vegetated hummock dunes, fixed or semi-fixed sandy land, interdune, deflation areas, fluvial-lacustrine sediments, and mountain sediments; 2) latitude and longitude; 3) sample ID; 4) natural frequency of sediments (The volumetric percentage content (%) for each interval within the 0 to 3500 μm range). This file provides fundamental data on the sediment composition across different landscapes, serving as the basis for the subsequent derivation of statistical grain size parameters and particle fractions in Files 2 and 3.<b>File 2:</b> Grain Size Parameters Database of Sediments from the Taklamakan DesertThe parameters are calculated based on the data in File 1 and are expressed in two formats: micrometers (μm) and phi (ϕ) units. File 2 contains the following data fields: 1) geomorphic type; 2) grain size parameters, the mean grain size, sorting, skewness, and kurtosis were included; 3) sample ID. These indicators can measure the energy of the sediment transport medium and transport mode.<b>File 3:</b> Particle Fraction Database of Sediments from the Taklamakan DesertThis file provides the content of each sediment sample in terms of its constituent particle fractions. These fractions are calculated based on the grain size components from File 1 and are expressed as volume percentages. File 3 contains the following data fields: 1) geomorphic type; 2) particle fraction; 3) sample ID. This file summarizes the compositional characteristics of the sediments, offering insights into the relative abundance of different particle fractions across various geomorphic units of the Taklamakan Desert.<br><br>

本数据集包含三份Excel文件：文件1、2、3均用于描述塔克拉玛干沙漠沉积物的粒度特征，其中文件2与文件3均基于文件1的数据计算得到。
<b>文件1：塔克拉玛干沙漠沉积物粒度数据库</b>
具体而言，文件1包含以下数据字段：1）地貌类型，涵盖流动沙丘、植被覆盖丘状沙丘、固定/半固定沙地、丘间地、风蚀区、河湖相沉积物及山地沉积物；2）经纬度坐标；3）样品编号；4）沉积物自然频率（0~3500μm区间内各粒级的体积百分比含量，单位：%）。本文件提供了不同地貌单元下沉积物组成的基础数据，为文件2与文件3后续推导粒度统计参数及粒级组分提供了核心依据。
<b>文件2：塔克拉玛干沙漠沉积物粒度参数数据库</b>
本文件的粒度参数基于文件1的数据计算得到，以微米（μm）与Φ（ϕ）两种单位表示。文件2包含以下数据字段：1）地貌类型；2）粒度参数，包括平均粒径、分选系数、偏度及峰度；3）样品编号。上述指标可用于表征沉积物搬运介质的能量条件与搬运方式。
<b>文件3：塔克拉玛干沙漠沉积物粒级组分数据库</b>
本文件展示了各沉积物样品的粒级组分构成情况。所有粒级组分均基于文件1的粒度组分数据计算得到，以体积百分比形式呈现。文件3包含以下数据字段：1）地貌类型；2）粒级组分；3）样品编号。本文件汇总了沉积物的组成特征，可用于解析塔克拉玛干沙漠不同地貌单元内各粒级组分的相对丰度。

搜集汇总

背景与挑战

背景概述

该数据集是一个关于塔克拉玛干沙漠地表沉积物的粒度综合数据库，包含三个Excel文件：File1提供原始粒度分布数据，File2和File3分别基于File1计算粒度参数和粒度组分含量。数据集覆盖多种地貌类型，如移动沙丘、固定沙地等，旨在为沉积物能量和运输模式研究提供基础数据，发布于2025年并受多个科研项目支持。