Dynamics of submergence and uplift of a sedimentary basin underlain by a phase‐change boundary
Dynamics of submergence and uplift of a sedimentary basin underlain by a phase‐change boundary
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相变边界下沉积盆地的浸没和抬升动力学
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
G. Wasserburg
中科院分区：
文献类型：
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作者：
R. O’Connell;G. Wasserburg
给出了一种计算处于均衡状态的相变边界下伏沉积盆地演化的方法。水深w(T)随水深和沉积速率ds/dt的运动方程为Q_w(W)dw/dt+Q_S ds/dt+(1-ρ_1/ρ_2)dl/dt=0，其中L(T)是相边界滞后于暂态平衡位置的时间。通过对确定dl/dt的温度场的某些近似，给出了该方程在不同时间段的数值精确积分。根据所用的物理参数，证明了解是衰减的、爆炸性的或近周期的。结果清楚地表明，这种类型的沉积盆地有可能沉积非常厚的沉积剖面，并存在(海平面以上和海平面以下)自持续振荡。
A procedure is given for calculating the evolution of a sedimentary basin underlain by a phase-change boundary that is in isostatic equilibrium. The equation of motion of the water depth w(t) as a function of the water depth and as a function of the sedimentation rate ds/dt is Q_w(w) dw/dt + Q_s ds/dt + (1 - ρ_1/ρ_2) dl/dt = 0 where l(t) is the lag of the phase boundary behind the transient equilibrium position. Numerically precise integrals of this equation are given for different time regimes by use of certain approximations for the temperature field that determine dl/dt. Solutions are demonstrated that are attenuated, explosive, or near periodic, depending on the physical parameters used. The results clearly show the possibility of depositing very thick sedimentary sections and the existence of self-sustained oscillations (above and below sea level) for a sedimentary basin of this type.