福建省漳浦复式岩体谱系单位划分及其地质意义  

Classification of the Lithodemic Unit about Zhangpu Complex in Fujian Province and Its Geological Significance

作　　者：姜平[1] 

机构地区：[1]福建信息职业技术学院,福建福州350019

出　　处：《吉林大学学报（地球科学版）》2004年第B10期15-22,共8页Journal of Jilin University：Earth Science Edition

摘　　要：漳浦复式岩体是一个主要由辉石闪长岩、石英(二长)闪长岩、花岗闪长岩、二长花岗岩、正长花岗岩及晶洞碱长花岗岩组成的大型中生代复式岩体。通过详细的室内外调查研究,根据侵入体之间及其与围岩的接触关系、岩石的矿物成分及岩石化学、结构构造、地球化学等特征,以成分演化单元为基本单位,漳浦复式岩体可划分出早侏罗世—晚白垩世共16个基本单元,归并为古美山、漳浦、漳洲3个超单元及4个独立单元。R1R2图解及巴尔巴林岩浆构造分类,漳浦复式岩体中各超单元(单元)侵入岩分别形成于不同的构造环境。据岩浆演化及其与区域构造演化的关系,该复式岩体是早侏罗世、晚侏罗世、晚侏罗世晚期—早白垩世、早白垩世及晚白垩世等5个构造—岩浆活动旋回岩浆活动的产物。Zhangpu complex is a large Mesozoic complex, which is composed of pyroxene-bearing diorite, quartz diorite (quartz monodiorite), granodiorite, monzonitic granite, syenogranite and alkali-feldspar granite. In terms of the principle of intrusive rock's composition evolution, which is large different from the texture evolution, according to the contract relation between intrusive bodies and between intrusive bodies and their wall-rocks, the intrusive rock's mineral and chemical composition, the rock's texture and structure and the geochemical characters, Zhangpu complex was divided into 16 units, which were incorporated into 3 superunits (Gumeishan, Zhangpu and Zhangzhou superunit) and 4 single-units (Niudushan, Hongshan, Shipeiqian and Mileshan unit). According to R1R2 diagram and Barbarlin's classification of intrusive rock in tectonic environment, the intrusive rocks in Zhangpu complex was considered as formation in difference tectonic environment. According to the relation between the evolution rule of magma and tectonic regime, the complex was considered as the products of magma intrusion in 5 tectonic-magma cycles—early Jurassic, late Jurassic, late Jurassic-early Cretaceous, early Cretaceous and late Cretaceous tectonic-magma cycle.

关 键 词：谱系单位 构造环境 构造-岩浆旋回 漳浦复式岩体 

分 类 号：P588.1[天文地球—岩石学]