阿拉善地区花岗岩中的同心多环带球体

一九八一年,我们在内蒙古阿拉善左旗北部地区进行岩体调查时,在巴音诺尔公复式花岗岩体中发现一些球状体(图版Ⅰ—1),单个球体直径为10—14厘米(图版Ⅰ—3),

The Poiyclic Sphroids in the Granites of Alga Zuoqi Region

In making a survey of Bayinuoergong rock mass in the north of Alxa Zuoqi region, Nei Monggol (Inner Mongolia), the authors have discovered a kind of polyclic spheroids with diameter of 10-14cm. They occur in the Hercynian granites in the form of accumulation and may have been the paticular granitic inclusions resulted from the transformation of sedimentary nudules during the long geology history. The authors suggest the following sequence in development of transformations development of sedimentary nudules-metamorphism-->remel- ting and granitization. This sequence eras supported both by the composition (mineral and chemistry) and the texture (or structure) of the spheroids and their round rocks.