Cumulate orthopyroxene occurs almost from top to bottom of the section . 堆积的斜方辉石几乎自下而上地分布在整个剖面中。
2.
The chemical components of the main minerals such as the garnet , clinopyroxene , orthopyroxene and plagioclase were analysed ; the temperatures and pressures of the mineral of different generations are computed with appropriate thermometers and barometers 对石榴石、单斜辉石、斜方辉石、斜长石等主要矿物的化学成分进行了分析。选取了合适的温度计和压力计，计算了不同世代矿物记录的温度和压力。
3.
Directions are obtained by two means : calculation and measure . our investigations are summed as follows : 1 the lpo relations between olivine and orthopyroxene are different from usually situations : 100ol 001opx , 010ol 100opx , 001ol 010opx ; 2 the seismic anisotropy of the ultramafic rocks in damaping is obvious . their characters are consistent with the structures of the rocks and fabrics of minerals , which means seismic anisotropy is mainly controlled by rocks fabrics ; 3 seismic velocities suggest that the composition of upper mantle in damaping region is resemble to the xenoliths , which major component is lherzolite 不同2大麻坪地区幔源包体的波速各向异性显著，岩石的波速各向异性特征与其宏观构造和微观组构一致，说明岩石组构是造成地震波速各向异性的决定因素3由地震波速推测的大麻坪地区的上地幔成分与包体出露的情况一致，即主体为二辉橄榄岩。
