摘要
辽西务欢池-铁匠各冷地区中生代—晚古生代花岗岩岩体可划分为十一个填图单元,据岩体形成时间、侵入接触关系、岩体及岩石组构特征,可把这十一个花岗岩填图单元归并为小欧力营和察哈尔山两个超单元。两个超单元主体岩性为钾长花岗岩和二长花岗岩,岩体成因类型属于壳幔混源型,二者岩源不同。小欧力营超单元同位素年龄为269Ma,侵入时代为早二叠纪,为强力就位;察哈尔山超单元同位素年龄为190Ma,侵位时代为早侏罗纪,岩石糜棱岩化明显。
Mesozoic-Late Palaeozoic granite rock body from Wuhuanchi to Tiejianggeleng in West Liaoning can be divided into 11 units and 2 ultra units:Chahaershan and Xiaoouliying ultra units Their main rocks are moyite and adamellite, and their origin is crust mantle mixture type Xiaoouliying ultra unit is determined to be 269 Ma,introding age is Early Permian period and its emplacement mechanism is forceful emplacement;Chahaershan ultra unit is determined to be 190 Ma,introding age is Early Jurassic period and its emplacement mechanism is passive emplacement
出处
《辽宁地质》
1999年第4期288-300,共13页
关键词
地质特征
就位机制
花岗岩
侵位时代
地球化学
West Liaoning
Chahaershan
Xiaoouliying
ultra unit
unit
geological characteristics
emplacement mechanism
