Geochronological data from Detrital Muscovite 40Ar/39Ar ages from the Indus Group, Ladakh, NW India

This dataset presents single-grain 40Ar/39Ar geochronological results generated from detrital muscovite samples belonging to the Indus Group, Ladakh using laser step-heating and mass spectrometry. The research objective is to constrain the timing of India-Asia collision by dating individual muscovite mineral grains at high precision. This is hypothesis-driven geochronological research, designed to reconstruct provenance histories in the studied region. Data were collected through laboratory argon extraction and isotopic analysis, with detailed analytical parameters and standards recorded. The dataset consists of numerical measurements of isotopic ratios, step-heating conditions, decay constants, and derived ages (in Ma), organized in tabular format suitable for reproducible geochronological analysis. The data was collected at the New Mexico Geochronology Laboratory at the New Mexico Tech. This dataset is part of the Tectonics journal article titled "Timing of the India-Kohistan Ladakh Arc and India-Asia Collisions Based on Detrital Muscovite Provenance of the Indus Group, Ladakh, NW India".

本数据集呈现了采自拉达克（Ladakh）地区印度河群（Indus Group）的碎屑白云母（detrital muscovite）样品的单颗粒40Ar/39Ar年代学（40Ar/39Ar geochronology）测试结果，测试采用激光阶梯加热法（laser step-heating）与质谱分析法（mass spectrometry）完成。本研究的目标是通过高精度定年单个白云母矿物颗粒，限定印度-亚洲碰撞（India-Asia collision）的发生时限。本研究属于假说驱动型年代学研究，旨在重建研究区域的物源（provenance）演化历史。数据集通过实验室氩气提取（argon extraction）与同位素分析（isotopic analysis）流程获取，详细的分析参数与测试标准均已完整记录。数据集包含同位素比值、阶梯加热条件、衰变常数以及衍生年龄（单位：百万年，Ma）的数值测量结果，以表格形式整理，可用于可复现的年代学分析。本数据集的测试工作由新墨西哥理工学院（New Mexico Tech）下属的新墨西哥年代学实验室（New Mexico Geochronology Laboratory）完成。本数据集隶属于发表于《构造学》（Tectonics）期刊的学术论文，论文标题为《基于印度西北部拉达克地区印度河群碎屑白云母物源分析的印度-科希斯坦-拉达克弧与印度-亚洲碰撞时限》。