• 首页|本刊简介|在线投稿|过刊浏览|高级检索|专家风采|学习园地|期刊论坛|联系我们
北京地区中元古界下马岭组页岩地球化学特征及其地质意义
Geochemical characteristics of Mesoproterozoic Xiamaling Formation shales in Beijing and their geological significance
投稿时间:2017-05-08  
中文关键词:北京  中元古界  下马岭组  页岩  地球化学特征  意义
英文关键词:Beijing  Mesoproterozoic  Xiamaling Formation  shale  geochemical characteristics  significance
基金项目:北京市土壤地质环境监测网运行资助项目(PXM2017-158307-000001)
作者单位E-mail
刘清俊 北京市地质勘察技术院, 北京 100039  
刘雨鑫 首都师范大学 地球空间信息科学与技术国际化示范学院, 北京 100048  
冯辉 北京市地质勘察技术院, 北京 100039 fenghuimail@163.com 
孙小华 北京市地质矿产勘查开发局, 北京 100195  
孟美杉 北京市地质勘察技术院, 北京 100039  
曹磊 北京市地热研究院, 北京 102218  
摘要点击次数: 187
全文下载次数: 192
中文摘要:
      对采自北京地区中元古界下马岭组的页岩样品,进行了地球化学研究,结果表明:主量元素Al2O3、CaO和Na2O含量明显偏低,K2O和MnO含量稍微偏低,SiO2、TiO2及Fe2O3T含量同上地壳基本一致。微量元素及其比值特征显示源岩为混合源岩。稀土元素总量较高,轻稀土富集、重稀土平坦,铕明显负异常、铈弱负异常,各样品稀土元素配分模式与大陆上地壳一致,显示了沉积物具有同源性。源岩为来自于内蒙古隆起的花岗岩类、闪长岩类及基性岩的混合。微量元素比值及铈弱负异常的特征表明中元古界下马岭组页岩为覆水较深的还原环境沉积,源区构造背景为大陆岛弧。
英文摘要:
      Based on analyses of the sampled shales of field outcrops and well cuttings, the authors studied the geochemical characteristics of the shales of Mesoproterozoic Xiamaling Formation in Beijing. Al2O3, Na2O and K2O are depleted whereas SiO2, TiO2 and Fe2O3T are relatively enriched. The shales show homogeneous REE content, relatively enrichment of LREE and depletion of HREE,obvious negative Eu anomaly, and slightly negative Ce anomaly. The REE distribution patterns from different shale samples showing an affinity reveal that they have the same source rocks including granitic, dioritoid and mafic rocks from the upper continental crust of Inner Mongolia uplift, and the ratios of trace elements show these features too. They were deposited in a reducing environment with relatively deep water. The tectonic setting of the source area seems to have been a continental island arc.
刘清俊,刘雨鑫,冯辉,孙小华,孟美杉,曹磊,2018,北京地区中元古界下马岭组页岩地球化学特征及其地质意义[J].岩石矿物学杂志,(2):230~240.
查看全文  查看/发表评论  下载PDF阅读器
关闭
您是本站第 4257129位访问者  京ICP备05032737号-8
版权所有:《岩石矿物学杂志》编辑部
主管:中国科学技术协会 主办:中国地质学会岩石学专业委员会 中国地质学会矿物学专业委员会 中国地质科学院地质研究所
技术支持:北京勤云科技发展有限公司
function PdfOpen(url) { var win="toolbar=no,location=no,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes"; window.open(url,"",win); } function openWin(url,w,h){ var win="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,width=" + w + ",height=" + h; controlWindow=window.open(url,"",win); } &et=2FA19B8FFDE8D2719E891F5F280D98EA2537A9BC2DAECC4CB43E0DC67B5B88177DEEFE9044F2B3F6BEDBF97E76E495C373DCD9F5EFF4BA2476A3B706829B4AB8A043BE7DF37C3ABC5290AB17849C63FC3DD8E47645DF955A853E05EECAABAAC8FA92208F21693DCEF20B867598AF79EEFFA3820EF519DD7E&pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=25F5F0F8F42BD24D151314EDEA002993&yid=EA357AD73C8E13BC&aid=&vid=&iid=0B39A22176CE99FB&sid=D6354F61445E9456&eid=C812B90E96151014&fileno=20180204&flag=1&is_more=0"> var my_pcid="E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B"; var my_cid="621CF755B1A341E5"; var my_jid="25F5F0F8F42BD24D151314EDEA002993"; var my_yid="EA357AD73C8E13BC"; var my_aid="";