对二郎坪群火神庙组物质组成的质疑与再认识  

QUESTIONING AND REUNDERSTANDING THECOMPOSITION OF HUOSHENGMIAOFORMATION, ERLANGPING GROUP

作　　者：姜常义[1] 苏生瑞[1] 张振飞[1] 杨志华[1] 赵太平 

机构地区：[1]西安地质学院科研处,河南省地质科学研究所

出　　处：《西安地质学院学报》1995年第2期1-5,共5页

摘　　要：经研究证明，前人建立的二郎坪群火神庙组确有少量的亚碱性双峰式火山岩。这些火山岩零星地分布在几个地区，走向不连续，出露宽度一般为数百米。构成该组主体的是一条规模宏伟的侵入岩带，其岩石组合为辉长岩－闪长岩－石英闪长岩－斜长花岗岩－花岗岩，总体上表现为正序岩浆演化序列。这些侵入岩普遍经历了三个阶段的变形变质作用，即第一阶段为韧性变形；第二阶段为静态重结晶；第三阶段为带状褶劈理，表现了复杂而漫长的构造演化史。The authors' work proves that there are a few sub-alkali dimodal volcanic rocks indeed in the Huoshengmiao Formation of the Erlangping Group determined by our precessors. They scatter in some placesand their trend is discontinuous. Their exposure width is generally a few hundred meters long. However, themain body constituting the Huoshengmiao Formation is a large scale intrusive belt with a rock association ofgabbro, diorite, quartz diorite, plagiogranite and granite. Overall it shows a positive magma evolution sequence. These intrusion rocks have widely undergone three stages of deformation and metamorphism, i. e.ductile deformation, static recrystallization and zoned crenulation, suggesting a long and complicated tectonicevolution history.

关 键 词：火神庙组 二郎坪群 侵入岩 物质组成 晚元古代 

分 类 号：P534.3[天文地球—古生物学与地层学]