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本文用磁场梯度法研究华北地区地幔高导层的埋藏深度。所用的 S_q 资料取自六个台站:大连、昌黎、北京、红山、泰安和西安。计算 C 值时用二次曲面法。为了解释本文的 C_(real)-T 曲线和|C_(imag)|-T 曲线,至少要假设地下是四层结构。最底层的电导率非常高,埋藏深度约为690km。中间可能有一夹层,电导率约为0.325S/m,厚约24.5km,其顶面的埋藏深度约为334km。上述结果只是初步的,其真实性还需更多的研究、证实。本区与我国东南地区的深部结构比较,差异很大,因此也需要研究其间是怎样变化过渡的。
In this paper, the magnetic field gradient method was used to study the burial depth of the high mantle in North China. The Sq data used were taken from six stations: Dalian, Changli, Beijing, Hongshan, Tai’an and Xi’an. Use the quadric method to calculate the C value. To interpret the C_ (real) -T curve and the | C_ (imag) | -T curve of this paper, we at least assume that the underground is a four-layer structure. The bottom of the conductivity is very high, buried depth of about 690km. There may be a sandwich in the middle with an electrical conductivity of about 0.325 S / m and a thickness of about 24.5 km, with a burial depth of about 334 km on the top surface. The above results are only preliminary, the authenticity of the need for more research, confirmed. The differences between this area and the deep structure in the southeast region of our country are quite different, and therefore we also need to study how the transition takes place during this period.