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现代地质 ›› 2016, Vol. 30 ›› Issue (4): 802-810.

• 地球化学 • 上一篇    下一篇

内蒙古大石寨地区稀土元素的区域分布特征

杨帆1,2,宋云涛1,张舜尧1,郝志红1,郭志娟1,王成文1,岑况2   

  1. 1中国地质科学院 地球物理地球化学勘查研究所,河北 廊坊065000; 2中国地质大学(北京)地球科学与资源学院,北京100083
  • 出版日期:2016-08-31 发布日期:2016-09-08
  • 通讯作者: 郝志红,女,工程师,1983年出生,分析化学专业,主要从事勘查地球化学配套分析方案及分析技术研究
  • 作者简介:杨帆,男,高级工程师,博士研究生,1983年出生,地球化学专业,主要从事勘查地球化学方法技术研究
  • 基金资助:
    中国地质调查局地质大调查项目(1212011220598,1212010050304,121201108000150002-03);中央级公益性科研院所基本科研业务费专项(YYWF201514,AS2014J02);国土资源部公益性行业科研专项(201411024)

Regional Geochemical Distribution Characteristics of Rare Earth Elements in the Dashizhai Area, Inner Mongolia

YANG Fan 1,2, SONG Yuntao1, ZHANG Shunyao1, HAO Zhihong1, GUO Zhijuan1, WANG Chengwen1, CEN Kuang 2   

  1. 1Institute of Geophysical and Geochemical Exploration, CAGS, Langfang,Hebei065000, China; 2School of Earth Sciences and Resources, China University of Geosciences, Beijing100083, China
  • Online:2016-08-31 Published:2016-09-08

摘要: 总结了内蒙古大石寨地区1∶25万区域地球化学调查获得的1点/4km2的水系沉积物组合样品中的La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Y等15种稀土元素的区域地球化学分布特征。稀土元素分布与研究区中部的黑云母花岗岩密切相关,轻稀土主要分布在该岩体外围的二叠系地层中,重稀土主要分布在该岩体上方。该岩体上方和外围地层的稀土元素分布、稀土元素总量、轻重稀土比及δCe、δEu、(La/Sm)N、(La/Tb)N、(La/Lu)N、(Ce/Yb)N、(Gd/Lu)N等稀土元素分馏特征的差异明显。利用区域地球化学调查水系沉积物样品中的稀土元素含量,可获得研究区可靠的稀土元素区域地球化学分布特征,也可反映研究区地质特点,并为区域地球化学异常解译提供参考资料。

关键词: 区域地球化学调查, 水系沉积物, 稀土元素, 大石寨地区, 异常解译

Abstract: Based on the regional geochemical survey, stream sediment sampling and analysis, the REE distribution characteristics of the stream sediments from the Dashizhai area in Inner Mongolia were evaluated systematically. Results show that ΣREE, ΣLREE/ΣHREE, δCe, δEu, (La/Sm)N, (La/Tb)N, (La/Lu)N, (Ce/Yb)N and (Gd/Lu)N of stream sediments have significant differences from the biotite granite in the central part of the study area and strata around the biotite granite. The REE distribution is closely related to the biotite granite; light rare earth elements are mainly distributed in the periphery of the biotite granite, and heavy rare earth elements are mainly distributed in the top of that biotite granite. The REE concentration of stream sediments from regional geochemical survey can reasonably describe the REE distribution, and can reflect the geological characteristics of the survey area, thus can provide references for the interpretation of regional geochemical anomalies.

Key words: regional geochemical survey, stream sediment, rare earth element, Dashizhai area, interpretation of anomaly

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