toscanite

Charnockites occur as giant enclaves or pendants(?) in the Miaoergou Batholith, Western Junggar region.

紫苏花岗岩呈岩体形式侵入于石炭纪地层中,又为碱长花岗岩侵入。

The Charnockite in this region was originated from igneous rock ofmagmatic activity and formed in 2390 ± 24Ma, It crystalized dire.

紫苏花岗岩属典型岩浆成因侵入岩，其侵位成岩时代为２３９０±２４Ｍａ，是区域麻粒岩相峰期变质作用期间长英质熔浆直接结晶的产物。

It is discovered that zircons(2400 Ma ±) from charnockite and granulite in LowerJining Group of Inner Mongolia and Sanggan Group of Hebei exhibit euhedral growthzoning and compositional zonation of increasing HfO_2 content and decreasing ZrO_2/HfO_2ratio from the core to the edge of a crystal,suggesting that these zircons grew duringmagmatic crystallization and differentiation.

本文对内蒙古上、下集宁群、河北桑干群紫苏花岗岩及麻粒岩中的锆石进行了形态、环带及成分分布的研究，发现这些岩石中存在岩浆成因和变质成因的锆石，论述了这两种锆石的成因矿物学特征，并对这些岩石的成因进行了探讨。