龙门山矿区黑云母花岗岩和细晶花岗岩锆石LA-ICP-MS U-Pb同位素分析结果

1）数据主要包含四个要素：“岩性”，“元素含量”，测点号和“同位素比值”；2）黑云母花岗岩和细晶花岗岩样品采用锆石ＬＡ-ＩＣＰ-ＭＳ的Ｕ-Ｐｂ测年，单矿物分选在河北区域地质矿产调查研究所实验室使用常规重选和磁选技术完成。锆石制靶、微量元素含量、Ｕ-Ｐｂ同位素定年分析在武汉上谱分析科技有限责任公司利用ＬＡ-ＩＣＰ-ＭＳ分析完成；3）黑云母花岗岩样品的锆石进行了25个点位的分析测试，其中５个点谐和度太低剔除，得到20个有效数据；样品的锆石进行了２０个点位的分析测试，其中11个点谐和度太低剔除，得到９个有效数据；（4）数据说明龙门山矿区黑云母花岗岩的锆石LA-ICP-MS U-Pb年龄为216.8±0.85Ma，而细晶花岗岩的锆石LA-ICP-MS U-Pb年龄为209.5±1.2Ma。

1) The dataset mainly includes four core elements: lithology, element content, measurement point number, and isotope ratio; 2) Samples of biotite granite and aplite granite were subjected to zircon LA-ICP-MS U-Pb dating. Single mineral separation was completed in the laboratory of Hebei Institute of Regional Geological and Mineral Resources Survey using conventional gravity separation and magnetic separation techniques. Zircon target preparation, trace element content analysis, and U-Pb isotopic dating analysis were carried out in Wuhan Shangpu Analysis Technology Co., Ltd. using LA-ICP-MS; 3) Zircons from biotite granite samples were analyzed at 25 spots, with 5 spots exhibiting overly low concordance excluded, yielding 20 valid datasets; Zircons from aplite granite samples were analyzed at 20 spots, with 11 spots exhibiting overly low concordance excluded, yielding 9 valid datasets; 4) The data indicate that the zircon LA-ICP-MS U-Pb age of biotite granite from the Longmenshan Mining Area is 216.8 ± 0.85 Ma, while that of aplite granite is 209.5 ± 1.2 Ma.