Tomographic determination of 3-D crustal structure — Joint inversion of explosion and earthquake data |
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Authors: | Xian-Kang Zhang Zhuo-Xin Yang Yu-Chun Yang Jian Yang Jian-Li Song and Ping Zhao |
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Institution: | (1) Geophysical Prospecting Center, SSB, 450003 Zhengzhou, China |
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Abstract: | In this paper, the theory and method, obtaining the tomographic determination of three-dimensional velocity structure of the
crust by use of the joint inversion of explosion and earthquake data, are given. The velocity distribution of the crust is
regarded as a continuous function of the spatial coordinates without parametrization of the velocity model ahead, so that
the inversion solution would not be influenced by different parametrization procedures. The expressions of integration kernels,
which relates the two kinds of data sets, are also given. The authors have processed the observed data in Tangshan earthquake
region by the method proposed in this paper, and obtained the tomographic results of the middle and upper crust structures
in this region. The comparison of these results with the result obtained only by the explosion data, has also been made. |
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Keywords: | explosion observation continuous model tomography crustal structure joint inversion |
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