滇西昌宁地区全岩地球化学和矿物U-Pb年代学数据集

本数据是滇西昌宁地区松山锡矿的锆石、独居石、石榴石和锡石的U-Pb年代学和同位素数据，以及该矿区花岗岩的地球化学数据。样品采自滇西松山锡矿，矿石类型为锡石，岩石类型为黑云母二长花岗岩和花岗闪长岩。单矿物分选在廊坊市宇恒矿岩技术服务公司完成; 制靶、阴极发光图像以及锆石U-Pb定年在北京离子探针中心完成，独居石和石榴石、锡石的U-Pb定年以及同位素测试在中科院地质与地球物理研究所利用多接收电感耦合等离子体质谱仪( LA-ICP-MS) 完成，全岩地球化学分析在加拿大actlabs实验室完成，数据置信度95%，数据可信度高。数据约束了昌宁地区主要出露的花岗岩为三叠世的产物，锡成矿是晚白垩世，证明在昌宁地区存在晚白垩世的岩浆-热液活动，是造成锡矿化的主要事件，锡矿化与三叠纪花岗岩关系不大。

This dataset contains U-Pb geochronological and isotopic data of zircons, monazites, garnets and cassiterites from the Songshan tin deposit in Changning area, western Yunnan, as well as geochemical data of granites from this mining area. All samples were collected from the Songshan tin deposit in western Yunnan. The ore type is cassiterite, and the rock types are biotite monzogranite and granodiorite. Single mineral separation was completed by Langfang Yuheng Mineral and Rock Technical Service Co., Ltd.; target preparation, cathodoluminescence (CL) imaging and zircon U-Pb dating were carried out at the Beijing Ion Probe Center. U-Pb dating and isotopic testing of monazites, garnets and cassiterites were conducted at the Institute of Geology and Geophysics, Chinese Academy of Sciences using multi-collector inductively coupled plasma mass spectrometry (LA-ICP-MS). Whole-rock geochemical analysis was performed at Actlabs Laboratory in Canada. The data have a 95% confidence level and high reliability. The data constrain that the predominantly exposed granites in Changning area were formed during the Triassic, while tin mineralization occurred in the Late Cretaceous, proving the existence of Late Cretaceous magmatic-hydrothermal activities in Changning area, which were the main event responsible for tin mineralization, and tin mineralization has little correlation with Triassic granites.

搜集汇总

背景与挑战

背景概述

该数据集提供了滇西昌宁地区松山锡矿的全岩地球化学和多种矿物（锆石、独居石、石榴石、锡石）的U-Pb年代学与同位素数据。数据表明，昌宁地区主要花岗岩形成于三叠世，而锡成矿事件发生在晚白垩世，揭示了晚白垩世岩浆-热液活动是锡矿化的关键因素，与三叠纪花岗岩关系较弱。