| 黑龙江省碾子山地区铌、钽矿地球化学特征及评价 |
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| 作者姓名： | 张俭峰 万太平 李新鹏 杨文鹏 赵忠海 徐东海 |
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| 作者单位： | 黑龙江省地质调查研究总院,哈尔滨 150036 |
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| 基金项目： | 黑龙江省自然资源厅“黑龙江省齐齐哈尔市碾子山地区稀有稀土矿普查(编号: SDK2012-21)”项目资助 |
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| 摘 要： | 为提高碾子山地区铌、钽矿的地球化学特征研究程度,通过1:1 万土壤地球化学测量,对区内地球化学元素含量特征、单元素异常特征、综合异常特征等进行研究分析。结果表明: 碾子山地区Nb、Ta等元素在研究区位于高背景场,在土壤中分布不均,存在局部富集成矿的可能; R型聚类分析将18种元素分为贵金属、有色金属元素,稀有、稀土元素和分散元素3组,显示为正长花岗岩体元素聚类组合特征,表明铌、钽矿与花岗岩体关系密切; 研究区共圈出土壤单元素异常521处,综合异常12处,其中碾-2012-Ht-2、碾-2012-Ht-7和碾-2012-Ht-11 3处综合异常为重点异常,成矿潜力较大。经槽探及钻探工程验证,共发现铌、钽低品位矿体3条,铌、钽矿化体11条,呈脉状分布于早白垩世碱性花岗岩、正长花岗岩中。
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| 关 键 词： | 碾子山 稀有稀土元素 铌 钽 碱性花岗岩 正长花岗岩 地球化学特征 |
| 收稿时间： | 2019-03-07 |
Geochemical characteristics and evaluation of Nb and Ta deposits in Nianzishan area of Heilongjiang Province |
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| Authors: | ZHANG Jianfeng WAN Taiping LI Xinpeng YANG Wenpeng ZHAO Zhonghai XU Donghai |
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| Institution: | Heilongjiang Institute of Geological Survey, Harbin 150036, China |
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| Abstract: | In order to improve the geochemical research degree of Nb and Ta deposits in Nianzishan area, the authors conducted 1:10 000 soil geochemical survey to comprehensively analyze the characteristics of geochemical element content, single element exception and comprehensive anomaly in the study area. The results show that Nb, Ta and other elements in Nizishan area belong to high background field and are unevenly distributed in the soil, which may result in the local enrichment of ore deposits. By R-type clustering analysis, these 18 elements were divided into three groups of precious and non-ferrous metal elements, rare and rare earth elements, and dispersed elements, which reflects the clustering and combination characteristics of normal granite elements, indicating that Nb and Ta minerals are closely related to granite bodies. In the study area, 521 single element anomalies and 12 composite anomalies were identified. Among these anomalies, three composite anomalies, Nian-2012-Ht-2, Nian -2012-Ht-7 and Nian -2012-Ht-11, were the key anomalies with great metallogenic potential. Three low-grade Nb and Ta ore bodies and 11 Nb and Ta mineralized bodies were found in the Early Cretaceous alkaline granite and syenogranite after trenching and drilling engineering verification. |
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| Keywords: | Nianzishan rare elements and REE Nb Ta alkali granite syenogranite geochemical characteristics |
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