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贺兰山汝箕沟三叠纪钙质结核特征及环境意义

Characteristics and environmental significance of the calcareous coneretions in Rujigou of Hela mountain

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【作者】 钟福平钟建华由伟丰寇卫锋边强

【Author】 ZHONG Fu-ping1,2,3,ZHONG Jian-hua3,4,YOU Wei-feng5,KOU Wei-feng6,BIAN Qiang7(1.School of Safety Science and Engineering,Hennan Polytechnic University,Jiaozuo,Henan 454003,China;2.Key Lab of Gas Geology and Gas Control of Henan Province,Jiaozuo,Henan 454003,China;3.Guangzhou Institute of Geochemistry,Chinese Academy of Science,Guangzhou 510640,China;4.School of Earth Resources and Information,University of Petroleum(East China),Dongying,Shangdong 257061,China;5.Research Institute of Exploration and Development,SINOPEC,Beijing 100083,China;6.Beijing City Planning and Research Institute,Beijing 100037,China;7.Troops 95338,Air Force of the Chinese People’s Liberation Army,Hengyang,Hunan 421200,China)

【机构】 河南理工大学安全科学与工程学院河南省瓦斯地质与瓦斯治理重点实验室中国科学院广州地球化学研究所中国石油大学(华东)地球资源与信息学院中国石油化工有限公司石油勘探开发研究院北京城建设计研究总院中国人民解放军空军95338部队1大队

【摘要】 研究贺兰山汝箕沟三叠统延长组地层发育钙质结核的形态,通过宏观、微观观察,分析钙质结核层特征,通过野外数据采集分析地球化学特征和环境特征.结果表明:钙质结核中微量元素Ba含量相对富集,而其他微量元素,如V、Sr、Co、Zr、Cr、Rb、Ni、B等含量相对较少;钙质结核中CaO质量分数为32.28%,CaO与MgO的质量分数比为27.31,表明其生成在温度较高、气候炎热、蒸发量大而且较为干旱的时期.因此,分析钙质结核的特征,对研究区当时的沉积环境研究有一定意义.

【Abstract】 Many different sizes of spherical calcareous coneretions was found in the group of Upper Triassic strata in Rujigou of Helan Mountain.They are embedded in the purple-red siltstone strata.Researches into their geochemical characteristics have shown that the Ba content is relatively high,but the contents of V,Sr,Co,Zr,Cr,Rb,Ni and B are relatively low.The contents of Cao and CaO/MgO are 32.28% and 27.31%,which show that they were formed during the an extreme climate with high temperature,rapid evaporation and dry weather.In short,the emergence of calcareous coneretions can be seen as a more reliable weather signs.

【基金】 国家“973”重点基础研究项目(2006CB202406);中国石化重点研究项目(07370502000130)
  • 【文献出处】 大庆石油学院学报 ,Journal of Daqing Petroleum Institute , 编辑部邮箱 ,2011年01期
  • 【分类号】P595
  • 【被引频次】12
  • 【下载频次】442
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