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CRYSTAL FRACTIONATION IN GRANITES: A CASE STUDY

机译:粒状晶体的分馏:案例研究

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摘要

The Rocky Hill stock is a small 1-type granodiorite intrusion of Upper Jurassic age on the western margin (Tulare County, California) of the southern Sierra Nevada batholith. The margin or rim-facies of this diapiric intrusion is relatively uniform medium-coarse grained granodiorite with normally zoned piagioclase, and surrounds a core zone marked by a finer grained subporphyritic texture with oscillatory-reverse zoned piagioclase, and containing many small aplite/pegmatite patches, pods, and segregations, as well as being host to several large aplite dikes, up to 10 feet in thickness.
机译:Rocky Hill储层是内华达山脉南部岩床西部边缘(加利福尼亚州图莱里县)上侏罗纪时代的一种小型1型花岗闪长岩。这种二尖峰侵入体的边缘或边缘相是相对均匀的中粗粒花岗闪长岩,具有正常的斜长岩斜纹岩,并围绕着一个核心区域,其特征是具有细粒状的亚卟啉质纹理,具有振荡反向的偏斜长圆形斜纹岩岩,并含有许多小的橄榄石/斜辉石斑块,吊舱和隔离区,并容纳了几只厚达10英尺的大型三角洲堤防。

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