| 松辽盆地东南隆起区营城组珍珠岩斑晶矿物研究 |
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| 引用本文： | 郑常青,丁雪,王璞珺,孟宪林,王虎,孙长利.松辽盆地东南隆起区营城组珍珠岩斑晶矿物研究[J].吉林大学学报(地球科学版),2009,39(6). |
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| 作者姓名： | 郑常青 丁雪 王璞珺 孟宪林 王虎 孙长利 |
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| 作者单位： | 吉林大学,地球科学学院,长春,130061 |
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| 基金项目： | 国家自然科学重点基金项目，教育部国家留学回国人员启动基金项目，国家重点基础研究发展计划项目 |
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| 摘 要： | 松辽盆地早白垩世营城组火山岩系含有丰富的珍珠岩,为松辽盆地重要的油气勘探目的层位.在松辽盆地边缘东南隆起九台地区出露有比较新鲜的珍珠岩,内部斑晶保存完好,裂隙发育;斑晶矿物主要有斜长石、黑云母、角闪石,还有镁铁质的单斜辉石和斜方辉石.对含斑晶珍珠岩和剔除斑晶后的珍珠岩玻璃质分别进行地球化学分析,斑晶矿物进行单矿物电子探针成分研究.其结果表明:该珍珠岩属于酸性高钾钙-碱性系列,微量和稀土元素特征显示与上部地壳相似;斑晶矿物单斜辉石为斜紫苏辉石和次透辉石,斜方辉石为紫苏辉石,均显示变质成因,属于捕虏晶;与珍珠岩相邻层位玄武岩的斑晶斜长石为拉长石,单斜辉石为铁次透辉石,属于岩浆成因.这些特征表明,珍珠岩原岩可能来自于上部地壳,其辉石等捕虏晶为岩浆上侵运移过程与围岩发生混染作用的结果.
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| 关 键 词： | 营城组 珍珠岩 斑晶矿物 松辽盆地东南隆起 矿物学 |
Study on Phenocrysts in Perlite of Yingcheng Formation,Southeastern Uplift of Songliao Basin,NE China |
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| ZHENG Chang-qing,DING Xue,WANG Pu-jun,MENG Xian-lin,WANG Hu,SUN Chang-li.Study on Phenocrysts in Perlite of Yingcheng Formation,Southeastern Uplift of Songliao Basin,NE China[J].Journal of Jilin Unviersity:Earth Science Edition,2009,39(6). |
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| Authors: | ZHENG Chang-qing DING Xue WANG Pu-jun MENG Xian-lin WANG Hu SUN Chang-li |
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| Institution: | ZHENG Chang-qing,DING Xue,WANG Pu-jun,MENG Xian-lin,WANG Hu,SUN Chang-liCollege of Earth Sciences,Jilin University,Changchun 130061,China |
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| Abstract: | The volcanic rocks of Early Cretaceous Yingcheng Formation contain abundant perlitic rocks and they are important petroliferous layers in Songliao basin.Fresh perlitic rocks are found in the Jiutai area of the southeastern uplift of Songliao basin.In the perlitic rocks,phenocrysts are well preserved and they are mainly composed of plagioclase,biotite,amphibole,and mafic clinopyroxene and orthopyroxene.We conducted geochemical analyses on the perlitic rocks as well as vitreous rocks after removing phenoscrys... |
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| Keywords: | Yingcheng Formation perlitic rocks phenocryst southeastern uplift of Songliao basin sedimentology |
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