Optically Stimulated Luminescence (OSL) Dataset from Tsunami Sand Sheet at PanjorPir, Gujarat, India

This dataset contains accepted equivalent dose (De) values and associated quality control parameters derived from Single-Aliquot Regenerative dose (SAR) measurements on quartz grains extracted from tsunami deposits at the ISR-Pp site, Gujarat, western India. These values were used for optically stimulated luminescence (OSL) age modeling to constrain the chronology of Holocene high-energy coastal events. Sample Context: - Site: ISR-Pp (PanjorPir, Kachchh Gujarat coast) - Material: Quartz grains (90–125 µm) extracted from coastal tsunami deposits - Protocol: SAR protocol performed using a Risø TL/OSL DA-20 reader with a 90Sr/90Y beta source Columns in the dataset: - `ED`: Equivalent dose (Gy) measured for each aliquot - `Err ED`: 1σ uncertainty associated with each De value (Gy) - `Er % (20)`: Relative error as a percentage of De (to guide acceptance threshold) - `EDi/si²`: Value of (De / σ²), for computing weighted averages - `1/si²`: Inverse squared De uncertainty (used in CAM and weighted mean calculations) Processing & Acceptance: Aliquots included in this table met the following SAR acceptance criteria: - Recycling Ratio between 0.9 and 1.1 - De Error ≤ 15% - Test signal change ≤ 10% (if assessed) Final values were used to calculate an age with different age models, with an overdispersion of ~36% and positive skewness (0.5), indicating a partially bleached De distribution. Software: Data analysis was performed using Microsoft Excel and the Luminescence package in R.本数据集包含来自印度西部古吉拉特邦ISR-Pp遗址海啸沉积物中提取的石英颗粒的单片再生剂量（Single-Aliquot Regenerative dose, SAR）测量所得的等效剂量（Equivalent dose, De）值及相关质控参数。这些数值被用于光释光（Optically Stimulated Luminescence, OSL）年代建模，以约束全新世高能海岸事件的年代学框架。 样本背景： - 采样遗址：ISR-Pp（古吉拉特邦卡奇地区潘乔皮尔海岸） - 实验材料：90–125 μm粒径的海岸海啸沉积物源石英颗粒 - 实验流程：采用Risø TL/OSL DA-20型读数仪搭配90Sr/90Y β辐射源，执行SAR剂量测试流程 数据集字段说明： - `ED`：每个单片的等效剂量（单位：戈瑞Gy） - `Err ED`：对应每个De值的1σ不确定度（单位：戈瑞Gy） - `Er % (20)`：以De百分比表示的相对误差（用于设定接收阈值参考） - `EDi/si²`：(De / σ²)的数值，用于计算加权平均值 - `1/si²`：De不确定度的倒数平方（用于CAM法及加权均值计算） 数据筛选与接收准则： 本表格收录的单片满足以下SAR接收标准： - 循环比介于0.9至1.1之间 - De不确定度≤15% - 测试信号变化率≤10%（若已开展相关评估） 最终数值被用于结合多种年代模型计算年龄，数据集的过度分散度约为36%，偏度为正值（0.5），表明De分布存在部分漂白现象。 数据分析工具： 本数据集的分析采用Microsoft Excel及R语言的Luminescence包完成。