蒙古Mushgai Khudag全岩主微量元素数据集

本项目关于蒙古国Mushgai Khudag杂岩体中磁铁矿-磷灰石岩、正长岩和碳酸岩的全岩主微量元素数据，Mushgai Khudag杂岩体位于蒙古南部区域。该数据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及澳实分析测试（广州）有限公司完成。对于主量元素分析，在样品中加入含硝酸锂的硼酸锂-硝酸锂熔融助熔剂，充分混合后，高温熔融。熔融物倒入铂金模子形成扁平玻璃片后，再用Philips PW 2400 XRF分析。精密度控制相对偏差 (RD, %) 在5%以内。对于微量元素分析，所用仪器为Agilent 7500a ICP-MS，对主微量元素含量进行灵敏度漂移校正，元素含量根据 AGV-2，BHVO-2，BCR-2，GSP-2，RGM-2 进行校准。分析流程为: 1个质量监控样 +8个样品 + 1个质量监控样，监控仪器准确度。本研究系统获取的全岩地球化学数据为精细解析Mushgai Khudag杂岩体中磁铁矿-磷灰石岩、正长岩与碳酸岩的成因联系及成矿专属性提供了关键制约。

This project focuses on whole-rock major and trace element data of magnetite-apatite rocks, syenites and carbonatites from the Mushgai Khudag Complex, which is located in southern Mongolia. All geochemical analyses were conducted at the State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (Wuhan) and ALS Global (Guangzhou) Co., Ltd.

For major element analysis, a lithium borate-lithium nitrate flux containing lithium nitrate was added to the samples. After thorough mixing, the mixture was fused at high temperature. The molten product was poured into a platinum mold to form a flat glass disk, and then analyzed using a Philips PW 2400 X-ray Fluorescence (XRF) spectrometer. The precision was controlled with relative deviation (RD, %) within 5%.

For trace element analysis, an Agilent 7500a Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was employed. Sensitivity drift correction was performed for the major and trace element contents, and the elemental concentrations were calibrated against certified reference materials AGV-2, BHVO-2, BCR-2, GSP-2 and RGM-2. The analytical sequence was: 1 quality control sample + 8 samples + 1 quality control sample, to monitor the instrument accuracy.

The systematically acquired whole-rock geochemical data in this study provides critical constraints for finely resolving the genetic links and metallogenic specificity between magnetite-apatite rocks, syenites and carbonatites in the Mushgai Khudag Complex.