A preliminary study of depth distribution of crystal sizes within the gabbro layer of the oceanic crust
海洋地壳辉长岩层中晶体颗粒大小随深度分布的初步探讨

The present crustal accretion model at a fast spreading ridge predicts at least an order of magnitude difference on average in the crystallization time, the time for a crystal to cool itself to a given temperature, between the upper gabbros and lower gabbros. As a consequence, lower gabbros of the oceanic crust could have a larger crystal grain size on average than that of the upper gabbros as seen from the filed observations at the Oman ophiolite.