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.本数据集包含从印度西部古吉拉特邦ISR-Pp遗址的海啸沉积物中提取的石英颗粒经单片再生剂量（Single-Aliquot Regenerative dose, SAR）测量得到的等效剂量（Equivalent dose, De）及其配套质控参数。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：提取自海岸海啸沉积物的90–125 μm石英颗粒 - 实验流程：使用配备90Sr/90Yβ源的Risø TL/OSL DA-20型读数仪完成SAR协议测试 数据集字段说明： - `ED`：单个裂片测得的等效剂量（De，单位：戈瑞Gy） - `Err ED`：每个De值对应的1σ不确定度（单位：戈瑞Gy） - `Er % (20)`：以De百分比表示的相对误差（用于设定验收阈值参考） - `EDi/si²`：(De / 不确定度σ²) 的数值，用于计算加权平均值 - `1/si²`：De不确定度的平方倒数，用于中心年龄模型（Central Age Model, CAM）与加权均值的计算 数据筛选与纳入标准： 本表格收录的裂片均满足以下SAR验收准则： - 循环比介于0.9至1.1之间 - De误差≤15% - 测试信号变化量≤10%（若已开展相关评估） 最终数值被用于通过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。 数据分析采用Microsoft Excel以及R语言的Luminescence数据包完成。