Seismic Structure of the Lithosphere and Sub-Lithospheric Mantle Beneath Australia from Broad-Band Array Data

Van der Hilst 9614341这项研究涉及到使用高分辨率的地震属性和地表观测数据(如热流、重力和地形)的三维模型来研究澳大利亚下面的地壳和地幔的结构和动力学。主要数据集来自Skippy项目，这是一个在澳大利亚大陆范围内部署宽带地震仪的项目，用于记录大陆内外的地震。地震参数的空间变化将通过层析成像来确定。利用横波分裂和面波反演法可以得到不同深度的方位各向异性图。模拟研究将被用来绘制澳大利亚地幔中温度、密度和粘度的三维变化。研究结果将适用于矿产经济和地震危险性研究。这项研究是国家减少地震灾害计划的一部分。***

van der Hilst 9614341 This research involves the study of the structure and dynamics of the crust and mantle beneath Australia using high-resolution 3-D models of seismic properties and surface observables such as heat flow, gravity, and topography. The main data set is derived from project SKIPPY, a continent-wide deployment of broadband seismometers in Australia that record earthquakes within and surrounding the continent. Spatial variations of seismic parameters will be determined by tomographic imaging. Azimuthal anisotropy maps a t different depths will be constructed from shear wave splitting and surface wave inversion. Modeling studies will be used to map 3-D variations in temperature, density, and viscosity in the Australian mantle. The results will be applicable to mineral economic and seismic hazard studies. This research is a component of the National Earthquake Hazard Reduction Program. ***