摘要
构造作用的热效应和温度变化是构造物理化学过程的主要研究内容。为探讨不同构造空间的侵位岩浆岩结晶ＰＴ轨迹的差别，建立有限元模型，模拟高温热源地质体向围岩传导热的过程，以研究该热源体的温度变化轨迹问题。设一定体积的热源地质体被分割成若干孤立体。随着分割数的增加，热源体的传导面积变大，分别相似处于封闭开放程度不同的构造空间的热源体。有限元数学模拟计算结果表明，处于挤压变形带→剪切变形带→引张变形带，热源体传导热量的速度表现出慢→较快→最快的差别，相应它们的温度降低速率则是小→稍大→最大。模拟研究说明，某一热源体因热量传导散发的温度降低速率与其所处构造空间封闭性系数呈反比。这一结果可以解释岩浆岩演化和差别的构造物理化学原因。
This paper sets up finite element models to simulate the processes of heat conduction of heat source geologic body toward conntry rocks,and to research the locus of variation in temperature of the heat source body. A heat source geologic body with certain volume is supposed to be divided into several isolate bodies.The conduction area of heat source body increases with increasing of amount of divided bodies.These divided isolate heat source bodies are similar to those in structural spacies under varing closing/opening extent.The calculated results of finite element models show that the velocities of heat conduction of heat soruce bodies under various conditions in compressive,shearing and extensional deformational belts are slow,faster and fastest respectively,their corresponding rates of temperature decreasing are small,bigger and biggest respectively. The research of models indicate that the locus of temperature varing of certain heat source body because of heat dissipation resulting from heat conduction is controlled by its structural space.This result provides the physicochemical reason for evolution and difference of structure and magmatic rock.
