摘要
It is well known that Earth history is punctuated by events during which large volumes of mafic magmas were generated and emplaced by processes unrelated to“normal”sea-floor spreading and subduction.These are recognized as Large Igneous Provinces.Systematic Study of dykes helps to understand and solve many geological problems.It helps to recognize Large Igneous Provinces(LIPs),particularly for the Precambrian period.Many LIPs can be linked to regional-scale uplift,continental rifting and breakup,and climatic shifts.
