EAPSI:Structure and Deformation Rates of the North Canterbury Fold and Thrust Belt, South Island, New Zealand

该项目的重点是新西兰南岛北坎特伯雷地区的活动断层。该项目将与新西兰海洋地质学家菲利普巴恩斯博士合作进行。美国国家水和大气研究所的研究员，他在近海断层方面做了大量的工作。除了专业知识，巴恩斯博士将提供访问一个大型数据库的海上地震反射数据，这是用来使图像的地下。该项目将涉及对这些数据的解释，这将补充正在进行的关于附近陆上断层的工作。解释将包括识别地震图像中的活动断层，模拟深度断层与上覆岩石褶皱之间的关系，以及估计断层滑动的速率。研究结果将用于识别可能导致未来地震的活动断层。它们还将提高人们对通常与断层相关的岩石折叠如何用于推断断层的位置和滑动量的理解。将对地震反射数据进行解释，以揭示与断层有关的褶皱的细节和基底正断层可能重新活动的情况。褶皱运动学模型，特别是三剪，将测试其适用于这些结构，并用于产生恢复的横截面。根据以前的地质测绘，将海上结果与陆上横截面相结合，以产生整个褶皱和冲断带的截面，并计算总缩短。将恢复生长地层以计算变形速率，包括活动断层的滑动速率，这些将与从沿海沿着的先前测年的海洋阶地得出的变形速率一起沿着使用，以估计横断面的缩短速率。最后，缩短和缩短率的计算将进行比较，该地区内的板块边界变形模型的预测。该奖项是与新西兰皇家学会合作资助的。

The project focuses on active faulting within the North Canterbury region of the South Island of New Zealand. The project will be conducted in collaboration with Dr. Philip Barnes, a marine geologist at New Zealand?s National Institute of Water and Atmospheric Research who has done extensive work studying offshore faults. In addition to expertise, Dr. Barnes will provide access to a large database of offshore seismic reflection data, which is used to make images of the subsurface. The project will involve interpretation of this data, which will complement ongoing work on nearby onshore faults. Interpretation will involve identifying active faults in the seismic images, modeling the relationship between faulting at depth and folding of overlying rocks, and estimating rates of fault slip. Results will be used to identify active faults that may cause future earthquakes. They will also improve understanding of how folding of rocks, which commonly occurs in association with faults, can be used to infer the location of and amount of slip on the faults. Seismic reflection data will be interpreted to reveal details of fault-related folds and the possible reactivation of basement normal faults. Fold kinematic models, particularly trishear, will be tested for their applicability to these structures and used to produce restored cross-sections. Offshore results will be combined with onshore cross-sections, based on previous geologic mapping, to produce sections across the entire fold and thrust belt and to calculate total shortening. Growth strata will be restored to calculate rates of deformation, including the rates of slip on active faults, and these will be used along with deformation rates derived from previously-dated marine terraces along the coast to estimate rates of shortening across the transects. Finally, shortening and shortening rate calculations will be compared to the predictions of models for plate-boundary deformation within the region. This award is funded in collaboration with the Royal Society of New Zealand.