海山顶部的岩石是由蛇纹石化超镁铁质方辉橄榄岩组成。
The rocks at the top of the seamount consist of serpentinized ultramafic harzburgite.
玄武岩中构成宝石的橄榄石产于二辉橄榄岩包体中和少量的捕虏晶中。
The gem-grade olivines exist in lherzolite enclaves and some xenocrysts.
阳原幔源包体包括二辉橄榄岩和方辉橄榄岩，是华北西部上地幔的直接样品。
The xenoliths in the yangyuan, including iherzolite and harzburgite, represent the direct samples from the upper mantle beneath western north China craton.
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