胶北隆起双顶超单元地质特征及成因探析

Geological Characteristics and Origin Study of Shuangding Superunit in Jiaobei Uplift

摘要:

胶北隆起区变质基底岩性较复杂，从中分离出正变质侵入岩，并按单元—超单元理论对其进行了谱系单位划分，其中古元古代吕梁期侵位的一套花岗闪长岩—二长花岗岩类侵入岩划为双顶超单元，根据其穿插关系、矿物成分及结构构造特征等进一步划分出5个单元。双顶超单元其侵位受构造控制，分布范围较广，同源岩浆演化特征明显。

Abstract:

Rock property of magnetic baserock is very complicted in Jiaobei uplift area, and positive magmatic intrusive rocks are departed from it. Lineage unit classification is carried out according to unit—superunit theory. Among them, granodiorite—monzonitic granite type intrusive rocks in Paleoproterozoic Lvliang period is classified into Shuangding superunit. According to its nterluding relation, mineral compositions and structural characteristics, it is divided into 5 units furthurly. Intrusion of Shuangding superunit is controlled by structure with wide distribution scope, and conmagmatic evolution characteristics is evident.