Analytical Methods for "The provenance dynamics of the Harbin loess, northeast China over the past 195 ka: Insights from heavy mineral composition"

This dataset contains four supplementary files that detail the experimental methods used in the paper "The provenance dynamics of the Harbin loess, northeast China over the past 195 ka: Insights from heavy mineral composition." The first file (Text S1) explains the detailed procedures for Optically Stimulated Luminescence (OSL) dating of the Harbin loess outcrop section, including sample collection and preparation, extraction of quartz and K-feldspar grains, measurement of the equivalent dose, and the calculation method for the total environmental dose rate. The second file (Text S2) describes the Electron Spin Resonance (ESR) dating method applied to the section samples, specifically the quartz Ti-Li center method, covering quartz extraction and purification, equivalent dose measurement using the additive dose method, and the evaluation of the environmental dose rate. The third file (Text S3) outlines the process for optical heavy mineral analysis of the Harbin loess sediments, which includes size separation, elutriation, heavy liquid separation, magnetic separation, and final microscopic identification and counting. The fourth file (Text S4) details the operational procedures for the automated mineral analysis of Harbin loess and Northeast Sandy Land sediments using a TESCAN Integrated Mineral Analyzer (TIMA), explaining its working principles, sample preparation, analysis mode selection, and data processing steps.

本数据集包含4份补充文件，详细阐释了论文《中国东北哈尔滨黄土过去19.5万年的物源演化：基于重矿物组成的启示》中所采用的实验方法。第一份文件（文本S1）阐释了哈尔滨黄土露头剖面的光释光（Optically Stimulated Luminescence, OSL）测年详细流程，涵盖样品采集与制备、石英与钾长石颗粒提取、等效剂量测量，以及总环境剂量率的计算方法。第二份文件（文本S2）介绍了适用于该剖面样品的电子自旋共振（Electron Spin Resonance, ESR）测年方法，具体为石英Ti-Li心法，内容包括石英的提取与纯化、采用附加剂量法测量等效剂量，以及环境剂量率的评估流程。第三份文件（文本S3）概述了哈尔滨黄土沉积物的光学重矿物分析流程，包含粒度分离、淘洗、重液分离、磁选，以及最终的显微鉴定与计数步骤。第四份文件（文本S4）详细说明了采用TESCAN集成矿物分析仪（TESCAN Integrated Mineral Analyzer, TIMA）对哈尔滨黄土及东北沙地沉积物开展自动化矿物分析的操作流程，阐释了其工作原理、样品制备、分析模式选择，以及数据处理步骤。