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刘宁. 东营凹陷永安地区古近系沙三段物源[J]. 科学技术与工程, 2021, 21(4): 1334-1341.
Liu Ning.Provenances of the Third Member of Shahejie Formation of Paleogene in Yong’an Area, Dongying Sag[J].Science Technology and Engineering,2021,21(4):1334-1341.
东营凹陷永安地区古近系沙三段物源
Provenances of the Third Member of Shahejie Formation of Paleogene in Yong’an Area, Dongying Sag
投稿时间:2020-04-14  修订日期:2020-06-04
DOI:
中文关键词:  稀土元素(REE)  物源  东营凹陷  永安地区  重矿物
英文关键词:rare earth element  heavey mineral  provenance  Yong’an Area  Dongying Sag
基金项目:国家科技攻关计划
  
作者单位
刘宁 中国石化股份公司胜利油田分公司勘探开发研究院
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中文摘要:
      本文通过岩石稀土元素的分布模式、重矿物组合特征和岩屑组成特征等方面的对比,对东营凹陷永安地区沙三段地层进行了物源分析。研究发现:永安地区沙三下亚段和沙三中亚段稀土元素分布特征具有明显的混源特征,沙三上亚段稀土元素分布特征和太古界片麻岩类最为相似;重矿物分析显示沙三中、上亚段太古界变质岩(片麻岩)源岩较多,沙三下亚段中生界火成岩、碎屑岩源岩相对较多;岩屑特征分析显示永安地区不同井区有不同的物源方向,介于凸起之间的多具有多向混源的特征。
英文摘要:
      Based on the comparion of distribution patterns of rare earth elements (REE), combination feature of heavy minerals and the rock fragment composition, the study explains the provenances of the Third Member of Shahejie Formaiton of Paleogene (Es3) in Yong’an Area, Dongying Sag. Research results show the distributon patterns of REE of the Lower and Middle Members of Es3 (Es3l, Es3m) are characterized with mixed provenances and that of the Upper Member of Es3 (Es3s) is similar to the Archaeozoic gneiss rocks. Analysis of heavy minerals shows there are more source rocks steming from the Archaeozoic metamorphic rock (mainly gneiss) for the strata of Es3m and Es3s while igneous and clastic rocks from the Mesozoic are the main sources for the strata of Es3l. Analysis of rock fragments shows there are different provenance directions for different well areas in Yong’an Area and the area between the two salients is characterized with multidirectional mixed source rocks.
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