In-Plane Stress Variations during the Rift/Drift Transition at Passive Continental Margins: Formation of the Break-up Unconformity on the Grand Banks

这个项目是为了验证这样一种观点，即在某些情况下，破裂不整合可能与岩石圈内面内应力的变化有关。选择研究的区域是加拿大东部大河滩的阿普提亚断裂不整合，因为在这个环境下，pi期望有很大的发现可能性。他们问所提出的机制是否有必要解释观察到的地层关系，以及该机制是否足以对岩石圈性质和面内应力的大小作出合理的假设。该研究包括对该地区地震和地层资料的分析以及岩石圈三维挠度模型的建立。数据分析将与加拿大石油资源公司的人员一起完成。地震地层学和层序地层学的概念，即可以归因于海平面在地质时期的波动的地层层序，已经来到地质思想的前沿。目前还不清楚这些序列是否完全是由实际的海平面波动造成的，还是部分是由构造作用造成的。这个项目将有助于解决这个问题。

This project is to test the idea that the break-up unconformity may, in some cases, be associated with variation in in-plane stress within the lithosphere. The area chosen for study is the Aptian break-up unconformity of the Grand Banks of Eastern Canada because in this setting the PIs expect a significant likelihood of detection. They ask whether the proposed mechanism is necessary to explain the observed stratigraphic relationships and whether the mechanism is sufficient for plausible assumptions regarding lithospheric properties and magnitudes of the in-plane stress. The proposed study includes analysis of the seismic and stratigraphic data from the region as well as the development of three dimensional lithospheric deflection models. The data analysis will be done in conjunction with personnel from Petro-Canada Resources. %%% The concepts of seismic stratigraphy and sequence stratigraphy, that is, stratigraphic sequences that can be attributed to the fluctuations in sea level over geologic time, have come to the forefront of geological thinking. It is not yet clear whether the sequences are strictly due to actual sea level fluctuations or whether they may be due in part to tectonic effects. This project will help sort this matter out.