Mushgai Khudag 磷灰石U-Pb年龄数据集

本数据集包含Mushgai Khudag杂岩体中岩浆成因磷灰石与热液成因磷灰石的U-Pb同位素年龄数据，实验分析在中国地质大学（武汉）地质过程与成矿预测全国重点实验室采用激光剥蚀电感耦合等离子体质谱（LA-ICP-MS）完成。实验参数设置为：50 μm剥蚀束斑、8-10 Hz重复频率、3-5 J/cm²能量密度，单点分析周期包含30秒背景信号采集和40秒有效样品信号采集。采用NIST 612标准玻璃进行仪器灵敏度漂移校正，以MAD磷灰石作为外标物质，通过标样-样品间插法（每分析4个样品插入3个标准物质分析）实现质量歧视校正。该数据通过高精度同位素定年技术，为精确厘定Mushgai Khudag杂岩体的岩浆侵位时代及多期热液演化历史提供了关键年代学约束。

This dataset contains U-Pb isotopic age data for both magmatic apatite and hydrothermal apatite from the Mushgai Khudag Complex. All experimental analyses were conducted at the State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (Wuhan) using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). The experimental parameters were set as follows: 50 μm ablation spot size, 8–10 Hz repetition rate, and 3–5 J/cm² energy density. Each single-point analysis cycle consists of 30 seconds of background signal acquisition and 40 seconds of valid sample signal acquisition. Instrument sensitivity drift was calibrated with NIST 612 standard glass, and MAD apatite was adopted as the external standard material. Mass discrimination correction was achieved via the standard-sample bracketing method, where three standard analyses were inserted after every four sample analyses. Leveraging high-precision isotopic dating technologies, this dataset provides critical geochronological constraints for accurately determining the magmatic emplacement age of the Mushgai Khudag Complex and its multi-stage hydrothermal evolution history.

搜集汇总

背景与挑战

背景概述

该数据集包含Mushgai Khudag杂岩体中岩浆成因磷灰石与热液成因磷灰石的U-Pb同位素年龄数据，通过激光剥蚀电感耦合等离子体质谱（LA-ICP-MS）分析获得，为研究该杂岩体的岩浆侵位时代及多期热液演化历史提供了关键年代学约束。数据以xlsx格式存储，共享方式为开放获取，数据大小为18.70 KB。