Proterozoic Continental Flood Basalts from Qilian Mountains
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  • 中国地质科学院西安地质矿产研究所,710054    
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  • Xi′an Institute of Geology and Mineral Resources, Chinese Academy of Geological Sciences, Xi′an, Shaanxi,710054    
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    摘要:

    祁连山西段大面积分布的元古宙浅海相火山岩系是大 陆裂 谷火山作用的产 物,属大陆溢流玄武岩系。岩石地球化学研究表明,它们具有高εNd值和低( 87Sr/86Sr)i值 ,系派生于岩石圈之下的地幔柱源,但也显示有岩石圈组分卷入的证据。它们的形成是地幔 柱岩石圈相互作用的结果,是北祁连山早古生代洋盆开启的前兆。

    Abstract:

    The Proterozoic neritic volcanic series in the western part of the Qili an Mountains ar e products of continental rift volcanism, belonging to continental flood bas alts.A petrogeochemical study of them suggests that they are characte ri zed by high εNd and low (87Sr/86Sr)i and are de rived from sublithospheric mantle p lume sources, but there is also for involvement of continental lithosphere compo n ents.Their formation is the result of mantle plumelithosphere inte ractions and is precursive to the opening of the early Paleozoic oc ean basin of North Qilian.

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夏林圻,夏祖春,徐学义,赵江天,杨合群,赵东宏.1999.祁连山元古宙大陆溢流玄武岩[J].地质论评,45(7):1028-1037,[DOI].
Xia Linqi, Xia Zuchun, Xu Xueyi, Zhao Jiangtian, Yang Hequn, Zhao Donghong.1999. Proterozoic Continental Flood Basalts from Qilian Mountains[J]. Geological Review,45(7):1028-1037.

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