Passive Source Seismology of the Rocky Mountain Region

摘要: Two recent passive source (earthquake) seismic experiments have produced a teleseismic and regional event data set which provides constraints on the structure of crust upper mantle beneath Colorado Rocky Mountains two major Precambrian province boundaries. The component Continental Dynamics (CD-ROM) experiment included dense north-south linear arrays broad-band seismometers straddling boundaries in Colorado, Wyoming, New Mexico. Mountain Front (RMF) thirty broadband spaced uniformly throughout Colorado. Results from spectrum seismological imaging inversion techniques indicate that Cheyenne Belt Archean-Proterozoic boundary southern Wyoming has signatures both mantle, while Yavapai-Mazatzal is less clearly defined. Studies RMF show pronounced low velocities Mountains, high attenuation (low Q) mantle. Techniques seismology used with CD-ROM are described here, along reference to corresponding studies.