本文選題：MORB + 玄武巖��； 參考：《大地構(gòu)造與成礦學》2017年02期

【摘要】：板塊構(gòu)造學說推動了玄武巖理論的完善和進步,從20世紀70年代興起的玄武巖構(gòu)造環(huán)境判別方法成為學術(shù)界關(guān)注的熱點,雖然現(xiàn)在逐漸降溫了,但在國內(nèi)仍然倍受青睞。大洋中脊玄武巖(MORB)是擁有數(shù)據(jù)最多、數(shù)據(jù)質(zhì)量最好、研究得最詳細的玄武巖類,是構(gòu)建玄武巖理論的基石。本文利用Pet DB數(shù)據(jù)庫資料(http://www.earthchem.org/petdb/search),對全球MORB數(shù)據(jù)進行了初步的挖掘,發(fā)現(xiàn)早先的玄武巖構(gòu)造環(huán)境判別方法的理論、思路需要進一步的完善。早先研究認為,N-MORB是強烈虧損的。但本文研究卻顯示,MORB成分具有較寬的變化范圍,包含了從MORB到OIB及IAB的組分,即部分MORB并不是虧損的,而是相對富集的。因此,玄武巖構(gòu)造環(huán)境判別理論及方法有待進一步的完善。
[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.
【作者單位】： 蘭州大學地質(zhì)科學與礦產(chǎn)資源學院甘肅省西部礦產(chǎn)資源重點實驗室;中國科學院地質(zhì)與地球物理研究所;中國科學院地質(zhì)與地球物理研究所巖石圈演化國家重點實驗室;北京礦產(chǎn)地質(zhì)研究所;甘肅省地質(zhì)調(diào)查院;
【基金】：中央高�；究蒲袠I(yè)務(wù)費項目(Lzu-Jbky-2012-128) 中國科學院地質(zhì)與地球物理研究所巖石圈演化國家重點實驗室項目(81300001)聯(lián)合資助
【分類號】：P542;P588.145

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