Abstract Alkaline rocks account for a small proportion of magmatic rocks with characteristics of the linear distribution, and can reveal the tectonic setting and in source mantle compositions. Based on the GEOROC global geochemical database, we studied the temporal-spatial evolution of alkaline rocks in the world through GIS spatial analysis and data statistical analysis techniques. The results show an abrupt increase of alkaline volcanic magmatism in the Cenozoic from the Mesozoic and Paleozoic, with the volcanic intensity in the Cenozoic being close to 100 times higher than the Paleozoic. The basalts fall mainly in the basanite and phonolite fields in the Total Alkali–Silica (TAS) discrimination diagram. Spatial analysis suggested that the Cenozoic basalts were usually produced along plate boundary or correlated with mantle-plume-related hot spots.

中文翻译：

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基于GEOROC的碱性岩石时空分析

摘要 碱性岩在岩浆岩中所占比例较小，具有线性分布特征，可以揭示构造背景和源地幔成分。基于GEOROC全球地球化学数据库，通过GIS空间分析和数据统计分析技术，研究了全球碱性岩的时空演化。结果表明，从中、古生代开始，新生代碱性火山岩浆活动急剧增加，新生代火山强度比古生代高近100倍。玄武岩主要落在总碱-二氧化硅（TAS）判别图中的玄武岩和音沸石领域。