摘要
四平山门早白垩世流纹岩 ,具有典型的古火山机构的分布特征 ,保存着罕见的发育完整的柱状节理。它标志着酸性火山熔岩在特定的古地理环境下所形成的原生构造的特殊性。它反映了燕山晚期岩浆活动的多期性和酸性岩浆喷发活动的差异性以及同源岩浆在相近环境条件下的成岩特征。对研究中生代晚期地壳运动及岩浆活动的规律性提供了不可多得的依据。
In Shanmen,Siping,Jilin province,the early Cretaceous rhyolite has typical distributive characteristics of the paleovolcanic apparatus,preserving rare,well-developed prismatic joint. It shows that acidic volcanic lava has a specific characteristic of the primary structure in the specific paleogeographic environment.Also,it indicates the multiperiodic characteristics of the late Yanshan magmatic activity,the differences of the acidic magmatic eruptivity and the comagmatic lithogenetic characteristics in the similar enviroment.It provides an exceptional basis for studying the late Mesozoic crustal movement and the regularities of magmatic activities.
出处
《吉林地质》
2001年第3期30-34,共5页
Jilin Geology
