摘要
本文根据浙东沿海燕山晚期岩浆岩的H,O,Sr和Nd稳定同位素及微量元素资料,综合分析了岩浆源区的地球化学特征,指出本区侵入岩和火山岩属同源、深源岩浆分异形成的同熔型(或I型)岩类。并且,从本区地壳运动的时、空演化规律角度,探讨了与板块构造机制密切相关的岩浆活动及其成矿作用的地质环境。
In this paper the geochemical characteristics of magma source are obtained from the data of H,O,Sr and Nd stable isotopes, and the trace elements of the late Yanshan igneous rocks in the coastal area of eastern Zhejiang Provonce. It is suggested that the intrusive-volcanic tocks in the area belong to the syntexis-type(or igneous-type)resulted from the differentiation of cognate-hypogene magmas. Furthermore,in the light of the tempo-spacial evolution of crustal movement in the area, the geological environment magmatic activity and its mineralization related to plate-tectonic mechanism are also discussed.
出处
《矿物岩石》
CAS
CSCD
1990年第4期57-65,共9页
Mineralogy and Petrology
关键词
岩浆岩
同位素
地球化学
微量元素
isotope geochemistry
trace element geochemistry
tectonic—magmatic activity
genesis of igneous rocks
Zhejiang Province
