[1]强 娟,曹红霞,张宪旭,等.鄂尔多斯盆地中东部马家沟组白云岩地球化学特征研究[J].西安科技大学学报,2015,(03):344-349.
 QIANG Juan,CAO Hong-xia,ZHANG Xian-xu,et al.Majiagou formation dolomite geochemistry characteristics in the central and eastern part of Ordos Basin[J].Journal of Xi'an University of Science and Technology,2015,(03):344-349.
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鄂尔多斯盆地中东部马家沟组白云岩地球化学特征研究(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2015年03期
页码:
344-349
栏目:
出版日期:
2015-06-30

文章信息/Info

Title:
Majiagou formation dolomite geochemistry characteristics in the central and eastern part of Ordos Basin
文章编号:
10.13800/j.cnki.xakjdxxb.2015.0312
作者:
强 娟1曹红霞1张宪旭2韩小琴1吴海燕1尚 婷1
1.陕西延长石油(集团)有限责任公司研究院,陕西 西安 710075; 2.中煤科工集团西安研究院,陕西 西安 710077
Author(s):
QIANG Juan1CAO Hong-xia1ZHANG Xian-xu2 HAN Xiao-qin1WU Hai-yan1SHANG Ting1
1.Research Institute of Yanchang Petroleum Group Co.,Ltd.,Xi'an 710075,China; 2.Xi'an Research Institute of China Coal Technology and Engineering Group Corp,Xi'an 710077,China
关键词:
鄂尔多斯盆地中东部 稀土元素 海源流体 还原环境
Keywords:
central and eastern part of Ordos Basin rare earth element marine fluid reducing environment
分类号:
P 595.5
文献标志码:
A
摘要:
稀土元素分析是一种判别白云岩化流体来源,分析白云岩的形成环境的重要手段。鄂尔多斯盆地中东部白云岩以明显高的Fe含量和低的Na,Sr和Mn含量为特征,白云岩化流体主要为海水或与海水有关,未受或很少受到大气淡水的影响。稀土元素配分图显示所有白云岩样品的曲线形态类似,都呈轻稀土富集和重稀土亏损的右倾模式,且具有Eu负异常和Ce的负异常,δEu平均值为0.45,Ce的平均值为0.35,表明白云岩形成于相对偏碱性还原环境,又受到后期构造热液流体的影响和改造; 三类白云岩的的模式都与泥微晶灰岩相近,也说明白云化流体与海水或海源流体相关; 综合鄂尔多斯盆地中东部马家沟组白云岩地球化学特征可以判断出区内白云岩的形成环境是相对还原的碱性环境。
Abstract:
Rare earth elements as an important mean is used to study the flow dolomitization origin and formation environment analysis of dolomite.The dolomite is characterized by significantly higher Fe content and lower Na,Sr and Mn contents in the central and eastern Erdos Basin.Dolomitization fluid is mainly concerned with sea water or seawater,without or little affected by atmospheric water.The REE distribution map shows all dolomite samples with similar curve shape,are light REE enrichment and heavy REE deficit right mode with a negative anomaly of Eu and Ce,δEu average value is 0.45,the average value of Ce is 0.35,the dolomite formed in relatively alkaline environment,and affected by the late tectonic hydrothermal fluid and transformation; three types of dolomite patterns are similar to the micritic limestons,also shows that dolomitization fluid associated with seawater or marine fluid.Synthesis Formation dolomite geochemistry of Ordos Basin in the central and eastern Majiagou can determine dolomite formed in relatively reduced alkaline environment.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-03-14 责任编辑:李克永 通讯作者:强 娟(1981-),女,陕西西安人,工程师,E-mail:qj81107@163.com
更新日期/Last Update: 1900-01-01