二辉辉石岩（websterite）简称二辉岩。辉石岩的一种,由斜方辉石和单斜辉石组成,其中每种辉石的含量＞10%,橄榄石＜5%。两种辉石常彼此相连,形成不规则的镶嵌结构。名称取自美国北卡罗来纳州韦伯斯特县。
后者以二辉石岩为代表，具典型堆积结构，与本区尖晶石二辉橄榄岩相比，具有较高的稀土元素丰度。
The latter is representive of pyroxenite, which displays the accumulate texture and has higher REE abundance than the Sp-lherzolite from the region.
对河北大麻坪碱性玄武岩及其内的辉石岩和二辉橄榄岩包体进行了不同温压条件下的弹性波速测定。
Measurements of elastic wave velocities at different high temperatures and high pressures were made on alkali basalt and xenoliths of pyroxenite and lherzolite from Damaping, Hebei.
石榴辉石岩的寄主岩是尖晶石橄榄岩类，包括尖晶石方辉橄榄岩和尖晶石二辉橄榄岩。
The host rocks of the garnet pyroxenite are spinel peridotites, including spinel harzburgite and lherzolite.
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