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

Published: 19 January 2026| Version 1 | DOI: 10.17632/dbrvg3kypc.1
Contributor:
DR. DRASTI GANDHI

Description

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.

Files

Steps to reproduce

This dataset contains optically stimulated luminescence (OSL) dating results and dosimetric measurements from tsunami sand sandwiched between mudflats from PanjorPir, Kachchh, western India. The data include equivalent dose (De) values, overdispersion, skewness, and modeled ages (CAM, MAM, weighted mean, and minimum 2σ) for sedimentary sites ISR-Pp (PanjorPir near Koteshwar). These data were collected as part of a study investigating the chronology and depositional characteristics of Holocene tsunami events to evaluate the reliability of age models in different coastal contexts.

Institutions

  • Institute of Seismological Research
  • MG Science Institute

Categories

Tsunami Deposit, Tsunami Hazard Assessment, Coastal Hazard, Optically-Stimulated Luminescence Dating

Funders

Licence