Uncertainties in Seismic Tomography
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摘要: 地震层析成像已经是一种常用的探测地球内部三维波速结构的地球物理方法。这些深部地球结构信息是人们深入认识地球的重要依据,同时由于地表地质过程往往取决于深部动力过程,因此深部结构已经开始受到了地质学家们的广泛重视。但地震层析成像方法众多,所得到的参数和精度可能有所不同,这给非地震学专业的研究人员在使用层析成像结果的过程中造成了极大的不便。为了更好地实现地球物理,地球化学和地质等多学科交叉应用,本文系统分析了地震层析成像结果中可能存在的不确定性,同时提出了相应的建议以帮助地质学家们能够正确对待层析成像结果中的不确定性并合理利用地震层析成像结果。Abstract: Seismic tomography is a common geophysical tool to explore three-dimensional deep seismic velocity structure of the Earth.Such deep structures are important information to better understand the Earth.Also, because most surface crustal processes are controlled by deep geodynamic processes, deep Earth structures become more and more favored by many geologists.But because there are currently a lot of seismic tomographic methods and their resulted structures and resolution are different, it is inconvenient for non-seismological researchers to use the tomographic results.To realize a better interdisciplinary combination of geophysics, geochemistry and geology etc., the present study made a comprehensive analysis on possible uncertainties existed in seismic tomographic results.Meanwhile, we gave correspondent suggestions to ensure that geoscientists could envisage the uncertainties and made reasonable use of the tomographic results.
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Keywords:
- Seismic tomography /
- velocity structure /
- resolution /
- uncertainties
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