高璞,高纬,姚志刚

• 1:西安石油大学地球科学与工程学院
• 2:新疆地质矿产勘查开发局第一区域地质调查大队

摘要(Abstract)：

鄂尔多斯盆地延长组长7油页岩中夹有多层钾质斑脱岩,为研究其地球化学特征,通过野外露头、岩心观察、X射线衍射分析、X荧光光谱分析、ICP-MS分析等手段,对长7钾质斑脱岩进行了细致的地球化学分析。结果表明:该斑脱岩以黏土矿物为主,其次为石英和长石;Si O2质量分数平均为61%,其次是Al2O3和K2O,分别为22.24%和3.7%,显示经历了强烈的蚀变作用;与北美页岩相比,Cr、Ni含量明显亏损,Rb、Sr、Th、U等含量明显偏高;与球粒陨石相比,Rb、Th、La偏高,Nb、Sr、Y相对较亏损;∑REE在(147.57~203.13)×10-6之间,稀土元素配分模式为"右倾型",即轻稀土富集、重稀土亏损,Eu负异常;在Nb/Y-Zr/Ti O2图解中,数据点主要落在流纹岩—流纹英安岩之间,表明火山物质主体来源于中酸性岩。

关键词(KeyWords)： 钾质斑脱岩;地球化学特征;长7油页岩;鄂尔多斯盆地

Abstract:

Keywords:

基金项目(Foundation): 中国地质调查局国土资源大调查项目(编号:1212011120963)

作者(Author): 高璞,高纬,姚志刚

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