十字石
shí zì shí
- staurolite;grenatite;granatite;xantholite
十字石
十字石[shí zì shí]
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十字石&铝直闪石之间的堇青石冠状体；
The corona of cordierite between staurolite and gedrite .
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十字石的出现表明变质作用已达到低角闪岩相。
The appearance of staurolite indicates that the metamorphism has reached the low amphibolite grade .
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堇青石、十字石构成围绕蓝晶石周围的冠状体，成为变质地体经历近绝热抬升的极好证据。
Cordierite and staurolite mainly formed corona textures surrounding kyanite or garnet , indicating the nearly adiabatic uplift of a metamorphic terrane .
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根据特征矿物组合.丹巴地区变质岩可划分出六个变质带：绢云母&绿泥石带、黑云母带、石榴子石带、十字石带、蓝晶石带和夕线石带。
In terms of mineral paragenesis , the metamorphic rocks can be subdivided into six metamorphic zones : sillimanite zone , kyanite zone , staurolite zone , garnet zone , biotite zone and sericite-chlorite zone .