MORB数据挖掘:玄武岩判别图反思

发布时间：2018-06-17 04:19

本文选题：MORB + 玄武岩　；参考：《大地构造与成矿学》2017年02期

【摘要】：板块构造学说推动了玄武岩理论的完善和进步,从20世纪70年代兴起的玄武岩构造环境判别方法成为学术界关注的热点,虽然现在逐渐降温了,但在国内仍然倍受青睐。大洋中脊玄武岩(MORB)是拥有数据最多、数据质量最好、研究得最详细的玄武岩类,是构建玄武岩理论的基石。本文利用Pet DB数据库资料(http://www.earthchem.org/petdb/search),对全球MORB数据进行了初步的挖掘,发现早先的玄武岩构造环境判别方法的理论、思路需要进一步的完善。早先研究认为,N-MORB是强烈亏损的。但本文研究却显示,MORB成分具有较宽的变化范围,包含了从MORB到OIB及IAB的组分,即部分MORB并不是亏损的,而是相对富集的。因此,玄武岩构造环境判别理论及方法有待进一步的完善。
[Abstract]:The theory of plate tectonics has promoted the improvement and progress of basalt theory. The method of judging basalt tectonic environment developed in 1970s has become a hot spot in academic circles. Although it has cooled down gradually, it is still popular in China. Middle oceanic ridge basalt (MORBB) is a kind of basalt which has the most data, the best data quality and the most detailed study. It is the cornerstone of basalt theory. In this paper, the global MORB data are preliminarily excavated by using the Pet DB database data (http: r / www.earthchem.org / petdbr searchan.org / P / petdbr searchn). It is found that the previous theory of judging basalt tectonic environment needs to be further improved. Earlier studies have suggested that N-MORB is a strong loss. However, the present study shows that the composition of MORB has a wide range of variations, including the components from MORB to OIB and IAB, that is, some MORB are not depleted, but relatively enriched. Therefore, basalt tectonic environment discrimination theory and method need to be further improved.
【作者单位】：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;中国科学院地质与地球物理研究所;中国科学院地质与地球物理研究所岩石圈演化国家重点实验室;北京矿产地质研究所;甘肃省地质调查院;
【基金】：中央高校基本科研业务费项目(Lzu-Jbky-2012-128) 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室项目(81300001)联合资助
【分类号】：P542;P588.145

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