闽北永兴地区晚侏罗世花岗岩岩石谱系单位的建立及演化特征  

Establishment of Litholineage Units and Evolution Characteristics of Late Jurassic Granite in the Yongxing Area of Northern Fujian

作　　者：李水龙[1] 

机构地区：[1]闽北地质大队

出　　处：《福建地质》1995年第1期27-42,共16页Geology of Fujian

摘　　要：浦城永兴地区分布大面积Ⅰ型花岗岩，具有成分和结构演化序列。根据花岗岩单元、序列的划分原则及超单元建立的条件，将永兴岩基解体划分为４０个侵入体，建立１４个单元，归并有虹垂序列及建立永兴和高坑超单元。这为闽北地区侵入岩的岩石谱系单位划分提供了重要资料。并在岩石学、岩石化学、地球化学、重矿物和副矿物等特征的基础上，总结了岩浆演化规律，探讨了岩体成因及形成的构造环境。据侵入岩体构造资料，确定为岩浆多次脉动的气球膨胀式侵位机制。The I-type granite, widely distributed in the Yongxing area of Pucheng County, presents an evolution sequence of the composition and structure. Based on the classification principles of granite units and series and the conditions of establishing a superunit, the Yongxing bath lith can be divided into 40 intrusive bodies and Yongxing and Gaokeng superunits, from which 14 granite units have been set up. In the paper, the author made a discussion on magmatic evolution,genesis and tectonic environment of the intrusive masses. According to structural data of intrusive masses, it is inferred that the intrusive masses were formed by a multiperiodic pulsation and swelled-balloon-type emplacement of the magma.

关 键 词：晚侏罗世 花岗岩 演化特征 岩石谱系 永兴地区 

分 类 号：P588.121[天文地球—岩石学]