Testing Models of Simple Sheer Deformation during the Rift- Transition in the South China Sea

pi将通过跨两个共轭边缘的质量平衡分析练习来测试简单剪切延伸假说和“上板悖论”。南海具有明确的共轭边缘，众所周知的扩展历史和地震资料和井网。他们将分析南海边缘，并在共轭巴拉望边缘的匹配跨边缘剖面上描述变形。他们将从测井资料中研究裂谷前基底的沉积沉降速率，并从MCS剖面中研究边缘的地壳伸展程度。盆地地层的正演模拟将确定观测到的沉降量是否与均匀伸展模型相一致。

The PIs will test the hypothesis of simple shear of extension and the "upper plate paradox" through a mass-balance analysis exercise across two conjugate margins. South China Sea has well-defined conjugate margins with well known spreading history and a network of seismic data and wells. They will analyze the South China Sea margin and describe the deformation on matching across-margin profiles of the conjugate Palawan margin. They will study the sediment-loaded subsidence rate of the pre-rift basement from well-log data and the degree of crustal extension from MCS sections across the margins. Forward modeling of basin formation will identify whether the observed amounts of subsidence are compatible with uniform extension models.