| 李得顺,李永虎,保善东,韩晓龙,谭运鸿.青海省大格勒沟脑稀有稀土元素成矿潜力评价[J].矿产勘查,2025,16(10):2314-2323 |
| 青海省大格勒沟脑稀有稀土元素成矿潜力评价 |
| Metallogenic potential evaluation of rare and rare-earth elements in Dagelegounao, Qinghai Province |
| 投稿时间：2025-01-10 |
| DOI：10.20008/j.kckc.202510008 |
| 中文关键词: 地球化学测量 数理统计分析 稀有稀土元素 潜力评价 大格勒沟脑 |
| 英文关键词: geochemical survey mathematical statistics analysis rare and rare-earth elements potential evalu.ation Dagelegounao |
| 基金项目:本文受青海省科学技术厅应用基础研究计划项目“东昆仑大格勒稀土综合物化探深部找矿技术应用研究”(2025-ZJ-702)和中国科学院“西部之光”人才培养计划“西部青年学者”项目“青海柴周缘稀有稀土矿综合物化探深部找矿技术应用研究——以茶卡北山锂铍矿、大格勒铌矿为例”联合共同资助。 |
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| 中文摘要: |
| 本文在提取大格勒沟脑 1∶2.5万地球化学测量 5673个原始数据的基础上，通过数理指标统计和多元统计的叠加分析，以期从地质-地球化学角度寻找元素组合关系以及判断稀有稀土元素成矿可能，为后续稀有稀土找矿工作提供基础支撑。统计显示，研究区正长花岗岩体及橄榄辉石二长岩体中 Nb、Y、Li、Be这 4种元素各项数理指标显示了较强的成矿潜力，结合多元统计分析及已有成矿事实，认为寻找岩浆热液型稀有稀土矿潜力巨大。以传统 X+2σ的异常下限划分方法结合 1/4浓幅分位值确定异常下限，圈定出浓集中心具有明显带状分布异常，剔除了多数弱小异常。综合地物化成果，制作组合元素累加数据三维图像，划分出 4个成矿远景区，指明了下一步找矿方向。 |
| 英文摘要: |
| On the basis of extracting 5673 raw data from 1∶25000 geochemical measurements in Dagelegou.nao, this article uses statistical analysis of mathematical indicators and multivariate statistics to explore elementcombination relationships and determine the possibility of rare and rare earth element mineralization from a geologi. cal geochemical perspective, providing basic support for subsequent rare and rare earth exploration work. Statisticsshow that the mathematical and physical indicators of Nb, Y, Li, and Be elements in the syenite granite and olivinepyroxene plutons in the study area show strong ore-forming potential. Combined with multivariate statistical analy.sis and existing ore-forming facts, it is believed that the potential for searching for magmatic hydrothermal rareearth deposits is enormous. Traditional X+2σ The method of dividing the anomaly lower limit is combined with the1/4 concentration range percentile to determine the anomaly lower limit, and the concentration center is delineatedwith obvious banded distribution anomalies, eliminating most weak anomalies. Based on the comprehensive geo.physical and geochemical achievements, a three-dimensional image of the accumulated data of combined elementswas created, and four minerogenic prospect were divided, indicating the next direction for mineral exploration. |
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