热点研究进展

Research progression about hotspots

介绍了热点的定义和基本特征并对关于热点研究需进一步探讨的问题进行了讨论。热点是地幔中长期和相对固定的热异常,它向海岛和大陆内部提供富集各种微量元素的岩浆,是地幔柱在地球表面的反映,主要以高热流、正重力异常、高地形隆起、剧烈火山活动为标志。热点在地球表面的分布是不均匀的,主要分布在南、北两个半球30°N^50°S的区域。关于地球上的热点个数,目前比较公认的观点是约有40~50个。最新的研究结果认为,根据热点的起源可以将全球热点大致分为两类,即传统意义上的热点(Classic hotspots)和构造成因的浅部热点(Notspots)。

This paper introduces a definition and characters about hotspot.Hotspots are a kind of relatively invariable and long thermal anomaly in mantle,which provide islands and continent with magma enriching all sorts of microelements.They are an indication of plume on the earth surface.Their characteristics are high heatflow,positive anomaly,high topography uplifting and strong volcanism.They mainly distribute the region between 30°N and 50°S.At present,the reliable numbers of hotspot lie on between 40 and 50.The newly study shows that there are two kinds of hotspots.Then we provide the focus of future research about hotspot.