Deep rifts as sources for alkaline intraplate magmatism in eastern North America
作者： Stephen Paul Phipps
DOI: 10.1038/334027A0
关键词: Paleontology 、 Intraplate earthquake 、 Magmatism 、 Mantle (geology) 、 Rift 、 Igneous rock 、 Geology 、 Geochronology 、 Lithosphere 、 Mantle plume
摘要: Intracontinental magmatism in eastern North America does not exhibit the regular time progression associated with mantle plume activity. Instead, is sporadic but locally persistent, suggesting that magmas rise from a source drifts continental plate. A spatial association ancient rifts further suggests this 'fertile9, melt-generating material emplaced lithosphere during early stages of rifting.
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