| 东营凹陷沙四段碳酸盐岩稀土元素地球化学特征 |
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| 引用本文： | 王东,王国芝,郝雪峰,石砥石,姜秀芳.东营凹陷沙四段碳酸盐岩稀土元素地球化学特征[J].沉积与特提斯地质,2009,29(4):62-67. |
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| 作者姓名： | 王东 王国芝 郝雪峰 石砥石 姜秀芳 |
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| 作者单位： | 1. 成都理工大学,地球科学学院,四川,成都,610059
2. 中国石化胜利油田分公司,地质科学研究院,山东,东营,257015 |
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| 基金项目： | "矿物学、岩石学、矿床学"国家重点(培育)学科建设项目 |
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| 摘 要： | 东营凹陷古近系沙河街组碳酸盐岩的成因一直存在湖相与海相之争。沙四段碳酸盐岩呈厚薄不等的夹层赋于陆相碎屑岩中。本文对研究区代表性碳酸盐岩样品稀土元素地球化学特征的分析表明：东营凹陷古近系沙四段碳酸盐岩的∑LREE〉∑MREE〉∑HREE，MREE相对于HREE富集；不具备Ce／Ce＊负异常特征；Y／Ho值为25．5～34．1，La／La＊值为0．99～1．21；Y／Ho—La／La＊呈负相关关系。所有这些特征均与湖相成因碳酸盐岩一致，沙四段碳酸盐岩的形成应为湖相成因。
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| 关 键 词： | 沙四段 碳酸盐岩 稀土元素 湖相成因 |
REE geochemistry of the carbonate rocks from the 4th member of the Shahejie Formation in the Dongying depression,Shangdong |
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| WANG Dong,WANG Guo-zhi,HAO Xue-feng,SHI Di-shi,JIANG Xiu-fang.REE geochemistry of the carbonate rocks from the 4th member of the Shahejie Formation in the Dongying depression,Shangdong[J].Sedimentary Geology and Tethyan Geology,2009,29(4):62-67. |
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| Authors: | WANG Dong WANG Guo-zhi HAO Xue-feng SHI Di-shi JIANG Xiu-fang |
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| Institution: | WANG Dong , WANG Guo-zhi , HAO Xue-feng , SHI Di-shi , JIANG Xiu-fang ( 1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, Sichuan, China ; 2. Shengli Oil Field Company, SINOPEC, Dongying 257015, Shandong, China) |
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| Abstract: | The carbonate rocks from the 4th member of the Shahejie Formation occur as interbeds in the continental clastic rocks in the Dongying depression, Shangdong. The REE geochemistry of the representative carbonate rock samples is characterized by ΣLREE ＞ΣMREE ＞ΣHREE, MREE enrichment relative to HREE, no Ce/Ce~* negative anomaly, Y/Ho ratios ranging from 25.5 to 34.1, La/La~* ratios ranging from 0.99 to 1.21, and negative correlation of Y/Ho vs. La/La~*. The similarity to the geochemical signatures of the lacustrine carbonate rocks indicates a lacustrine origin of the carbonate rocks in the study area. |
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| Keywords: | 4th member of the Shahejie Formation carbonate rock REE lacustrine origin |
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