莺歌海盆地泥底辟构造成因机制的模拟实验(一)

莺歌海盆地泥底辟构造主要是在热动力作用下形成和演化的,包括热传导和热对流作用.热动力作用是主驱动力,沉积物差异重力和水平应力作用是次驱动力.莺歌海盆地泥底辟构造实质上是沉积在盆地中、底部的巨厚泥岩层,在经基底传导到上覆沉积层的深部高温场作用下.转变为泥岩高塑性粘流体的热流动、热聚集、热膨胀、热升压、热扩张和热刺穿的物理效应.

MODEL EXPERIMENTS ON THE MECHANISM OF MUD DIAPIR STRUCTURE IN YINGGEHAI BASIN,SOUTH CHINASEA

The mud diapir structure in Yinggehai Basin,South Chian Sea,was been formed and evoluted mainly by thermodynamic actions. Compared with the gravitative differentiation and lateral-stress effects,the thermodynamic action is considered as primary driving force,and the others are secondary. The mud diapir structures of Yinggehai region are virtually a physical effect of the thermal flow, aggreation,expansion,rising pressure,and explosing, etc, to transfer mudstone in the basin into mudstone viscous-plastic fluid during the function of deep high temperature field.