鄂尔多斯盆地陇东地区延长组的物源分析
Provenance analysis of the Yanchang Formation in eastern Gansu,Ordos Basin
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摘要: 笔者从区域沉积背景入手,对鄂尔多斯盆地陇东地区长3油层组泥岩稀土元素、碳酸盐岩岩屑、轻重矿物、砂岩粒度等进行综合分析研究,认为研究区内存在混合物源,物源方向主要有北东向和西南向,并初步判断,北东物源的边界大致在南梁-华池地区,西南物源的边界大约在悦乐地区。Abstract: The synthetic analysis of REEs in mudstone,carbonate debris contents,light and heavy minerals and grain sizes of sandstone in the Chang-3 oil reservoirs shows that the sediments dominantly come from the northeast and southwest in eastern Gansu,Ordos Basin.The provenance boundaries are approximately arranged in the Nanliang-Huachi region in the northeast,and in the Yuele region in the southwest.
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Key words:
- Yanchang Formation /
- REE /
- carbonate debris /
- light and heavy mineral /
- provenance analysis /
- Ordos Basin
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