摘要
白玉县热加地区脉岩发育，成群成带集中分布于义敦群都萨岩组及上三叠统根隆组地层中，经研究认为脉岩为岛弧岩浆滞后侵入的钙碱性岩石，其形成与深部隆起、浅部伸展作用相关。
Rejia area,Baiyu,Sichuan is characterized by the development of dyke rocks wich were emplaced in groups and in zones into the Sayan Formation (T(1-2))and the Genlong Formation(T3). Study on relationship of the dyke rocks with the volcanic rocks indicates that hysteretic intrusion of calc-alkaline magma in island-arc environment in island-arc rature stage was responsible for formation of these dyke rocks. Such a hysteretic intrusion bears relationship to tumescence in lower level and extension in higher level and indicates that Rejia area was an upwelling one in Carnian(T3) which is of importance to the regional geological history and stratigraphic division.
出处
《四川地质学报》
1995年第1期23-26,共4页
Acta Geologica Sichuan
关键词
脉岩
成群成带
地质特征
形成机制
dyke rock, in groups and in zones, geological features, genetic mechanism.
