一、前言橄欖石和輝石都是含Mg、Fe、Ca矽酸盐矿物。它們的比重、电磁性及其他一些物理性貭都是很相似的。所以一般选别比較困难,只能在双目鏡下挑选,要研究这类矿物选矿将是一个困难問題。但是为了了解超基性岩及基性岩中造岩矿物,就要选别这两种矿物。我們曾利用了表面涨力的原理来分离这二种矿物。其作法簡单,在野外及室內都可进行,效果比鏡下挑选提高十几倍(純度达95％左右)。因此将这种方法介紹出来,供有关方面参考。 First, the foreword Both olivine and pyroxene contain Mg, Fe, Ca silicate minerals. Their proportion, electromagnetism and other physical properties are very similar. Therefore, the general sorting more difficult, only in binocular selection, to study such mineral processing will be a difficult problem. However, in order to understand the ultrabasic rocks and basic rocks in rock-forming minerals, we must choose the two minerals. We have used the principle of surface tension to separate these two minerals. Its practice is simple, can be carried out in the field and indoor, the effect of selection than the mirror to improve ten times (purity of about 95%). So this method is introduced for reference.