摘要
福建燕山期具有3个阶段岩浆活动，在环太平洋火山岩带中独具特色。而中生代火．山岩岩石化学、地球化学的时空变化，亦反映出其火山活动具有3个发展阶段的特点。通过研究认为，福建中生代火山岩的形成与太平洋板块向欧亚大陆板块俯冲作用有密切相关。是处于板内靠近大陆边缘或大陆边缘靠近板内的特殊构造位置环境下的产物。可谓之“浙闽型火山岩”。
The magmatic activities in Fujian Province during the Yanshan cycle can be divided into 3 stages, which is rare among the coastal provinces of Southeast China and even in the whole country, and have unique characteristics among the volcanic rocks from the circum-Pacific volcanic belt. And the space--time variation of the Mesozoic volcanic rocks in petrochemistry and geochemistry also shows that the evolution of volcanic activities is of 3 stages. It is suggested that the forming of the Mesozoic volcanic rocks in Fujian Province is closely related to the subduction of the Pacific Plate beneath the Eurasian Plate, and that they are the products in the environment of such specific tetonic setting as intraplate near continental margin or continental margin near intraplate. It is further suggested that they can be called as'ZhejiangFujian type volcanic rock'.
出处
《福建地质》
1997年第1期10-20,共11页
Geology of Fujian
关键词
中生代
火山岩
岩石化学
地球化学
岩石成因
Mesozoic volcanic rock,petrochemistry,geochemistry,Fujian Province
