全球大陆板内玄武岩数据挖掘  

A Mining of Data of the Global Intra-continental Basalt

作　　者：杜雪亮 李玉琼 杜君 马蓁 王金荣 

机构地区：[1]兰州大学地质科学与矿产资源学院甘肃省西部矿产资源重点实验室,兰州730000

出　　处：《矿物岩石地球化学通报》2017年第6期905-911,共7页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金重大研究计划(91014001);岩石圈演化国家重点实验室开放基金项目(81300001);中央高校基本科研业务费项目(Lzu-Jbky-2016-197)

摘　　要：大陆板内玄武岩(ICB)是一个广义的术语,包括大陆溢流玄武岩(CFB)、大陆裂谷玄武岩(CRB)以及所有出露在大陆板内构造环境的玄武岩。本文研究的大陆板内玄武岩不包括大陆溢流玄武岩和大陆裂谷玄武岩,主要是一些规模比较小的玄武岩,是狭义的ICB。本文详细介绍了研究的方法、数据清洗过程以及数据处理过程。在上述研究的基础上探讨了新生代ICB的时空分布,着重对不同时代的ICB进行了对比,发现中新生代、古生代、元古代的ICB的地球化学特征总体上一致,其中,古生代和元古代之间的相似性更加明显,而中新生代则显示V、Sc、Yb亏损的特征,具体如何解释还需要今后进一步的研究。本文的研究表明,全球不同时代ICB的地球化学特征大体相似,地质理论中的"将今论古"原则适用于ICB,只是在应用时尽量回避Al_2O_3、Zn、V、Sc、Yb等元素就更加万无一失了。Intra-continental basah （ICB） is a broad term which is used to describe various basahs, including continental flood basalt （CFB） and continental rift basalt （CRB）, and all other basalts exposed in the intra-continental tectonic environment. The intra-continental basalt studied in this paper is only the basalt limitedly distributed within the continent. It does not include continental flood basalt and continental rift basalt. In this paper,the research methods, processes of data cleaning and data pro- cessing have been described in details. Based on the above work, we have discussed the temporal and spatial distribution of the Cenozoic ICB. Especially, we have compared the ICB in various ages and found that the Mesozoic-Cenozoic, Paleozoic and Prot- erozoic ICB have generally similar geochemical characteristics, with more obvious similarities between the Paleozoic and the Proterozoic ICB. The Mesozoic-Cenozoic ICB has characteristics of relative depletion of V, Sc, Yb. How to explain this phenom- enon needs further research in the future. The results of this paper show that the global ICB in various ages have generally simi- lar geochemical characteristics. The principle of ＂ The present is the key to the past ＂ could be applied perfectly to comparing geochemical characteristics of the ICB in various ages if some elements, such as A1, Zn, V, Sc, and Yb, can be not considered.

关 键 词：大陆板内玄武岩 大数据 置信椭圆 时代 对比 

分 类 号：P588.145[天文地球—岩石学]