滇中禄劝九龙方解石矿床LA-ICP-MS原位方解石U–Pb定年数据集（2021-2024）

本数据集为LA-ICP-MS原位方解石U–Pb定年，通过分析方解石矿体样品，探讨了方解石矿床的成矿年龄。研究表明，方解石成矿流体为一期流体测获的方解石U–Pb年龄为36.0 ± 4.0 Ma (n=23, MSWD=1.5), 与盆地喜马拉雅期区域性岩浆热液活动有关。LA-ICP-MS原位方解石U–Pb定年分析在四川创源微谱科技有限公司完成分析过程中，激光工作参数一般为频率10 Hz，能量密度5 J/cm2，束斑100 μm。在刻试之前用NIST 612对ICP-MS性能进行优化，使仪器达到最佳的灵敏度及尽可能小的氧化物产率(ThO/Th <1%)和低的背景值。本次实验采用AHX-1d为主标，LD-5和Duff Brown Tank作为联合质控样参与分析。方解石U–Pb年龄谐和图利用美国伯克利地质年代学中心开发的Isoplot v.3.75软件绘制。

This dataset documents in-situ calcite U–Pb dating via laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). It investigates the mineralization age of calcite deposits through analysis of calcite ore body samples. Studies indicate that the mineralizing fluids for the calcite deposits correspond to a single fluid event. The obtained calcite U–Pb age is 36.0 ± 4.0 Ma (n=23, MSWD=1.5), which is associated with regional magmatic-hydrothermal activities during the Himalayan period in the basin. The LA-ICP-MS in-situ calcite U–Pb dating analyses were performed at Sichuan Chuangyuan Weipu Technology Co., Ltd. During the analytical process, the standard laser operating parameters were set as follows: frequency 10 Hz, energy density 5 J/cm², and beam spot diameter 100 μm. Prior to laser ablation, the ICP-MS performance was optimized using NIST 612 to achieve optimal instrument sensitivity, the minimum feasible oxide production rate (ThO/Th < 1%), and low background levels. In this experiment, AHX-1d was used as the primary standard reference material, while LD-5 and Duff Brown Tank served as joint quality control samples for the analysis. The calcite U–Pb age concordia plots were plotted using Isoplot v.3.75 software developed by the Berkeley Geochronology Center of the United States.

搜集汇总

背景与挑战

背景概述

该数据集包含滇中禄劝九龙方解石矿床的LA-ICP-MS原位方解石U–Pb定年数据，成矿年龄确定为36.0 ± 4.0 Ma，与喜马拉雅期岩浆热液活动相关。数据以文本格式存储，开放获取，适用于地球化学和矿床研究。