中国东北东部中生代火山活动与泛太平洋板块

Mesozoic volcanism in the eastern part of Northeast China and Transpacific plate

长白山脉中生代火山岩带与东侧之洋陆边界平行展布。火山岩浆作用可划分为三大构造阶段(2 30～ 190Ma ,178～ 12 5Ma ,118～ 6 5Ma) ,四大旋回 ,11个旋回和 2 4个火山事件。由安粗岩系和钙碱性岩系组成的一个新的火山岩浆作用构造类型 ,称之为走滑大陆边缘—拉分张裂性火山岩系。洋陆板块互动方式的更迭及速率的变化是火山岩浆作用地球动力学深部发展过程的主控因素。

The Mesozoic volcanic belt in the Changbai Mountains is parallel to the ocean continent boundary to its east. Volcanism occurred in three major tectonic stages (230～190, 178～125 and 118～65 Ma), four megacycles, 11 cycles or 24 volcanic events. A new tectonic type of volcanism composed of the latite series and calc alkaline series is called the strike slip continental margin pull apart tensile fracture volcanic series. The changes in the mode and rate of movements of oceanic and continental plates is the main controlling factor for the process of dynamic development of volcanism at depths.