科马提岩(komatiite)为超基性喷出岩,1969年发现于南非巴伯顿山地的科马提河( Komati)流域,故以此命名。
科马提岩于1969年首次被发现,它是地球上已知的最古老的火山岩,含镁量是大多数火山岩的三倍。
First identified in 1969, komatiites are Earth's oldest known volcanic rocks and contain three times as much magnesium as do most volcanic rocks.
本文研究的科马提岩位于大兴安岭北段吉峰地区。
The Jifeng komatiites are situated in the north Da Hinggan Ling.
桂北四堡群的科马提岩,自下而上分为堆晶带、鬣剌带和冷凝带。
Komatiite in the Sibao Group of northern Guangxi may be divided in ascending order into the cumulus zone, spinifex zone and chilled zone.
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