| 文安─蔚县─察右中旗剖面地壳上地幔速度结构与构造研究 |
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| 引用本文： | 张成科,张先康,盖玉杰,祝治平,张建狮,阮虹.文安─蔚县─察右中旗剖面地壳上地幔速度结构与构造研究[J].华北地震科学,1997(3). |
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| 作者姓名： | 张成科 张先康 盖玉杰 祝治平 张建狮 阮虹 |
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| 作者单位： | 国家地震局地球物理勘探中心!郑州，450003，国家地震局地球物理勘探中心!郑州，450003，国家地震局地球物理勘探中心!郑州，450003，国家地震局地球物理勘探中心!郑州，450003，国家地震局地球物理勘探中心!郑州，450003，国家地震局地球物理勘探中心!郑州，450003 |
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| 基金项目： | 国家科委“八·五”科技重点项目 |
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| 摘 要： | 利用文安～蔚县～察右中旗深地震测深剖面的资料，进行了一维、二维射线追踪走时拟合与合成地震图计算，获得了本区地壳上地幔速度结构。结果表明，地壳上地幔速度结构在纵向和横向上具有明显的不均一性。M面起伏较大，其埋深由冀中拗陷的31．0km向西至山西隆起区北部天镇达42．0km左右。浅部断裂较发育，根据对应其地壳深部界面及速度等值线起伏变化程度和反映断裂带附近各波组特征，推测了地壳深部断裂。
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| 关 键 词： | 地壳厚度 莫霍间断面 地震测深 壳幔构造 |
A STUDY OF CRUST AND UPPER MANTLE STRUCTURE ON WEN'AN -YUXIAN -QAHARYOUYIZHONGQI PROFILE |
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| $Zhang Chengke, Zhang Xiankang, Gai Yujie Zhu Zhiping, Zhang Jianshi, Ruan Hong.A STUDY OF CRUST AND UPPER MANTLE STRUCTURE ON WEN''''AN -YUXIAN -QAHARYOUYIZHONGQI PROFILE[J].North China Earthquake Sciences,1997(3). |
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| Authors: | $Zhang Chengke Zhang Xiankang Gai Yujie Zhu Zhiping Zhang Jianshi Ruan Hong |
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| Abstract: | In this paper, 1-D and 2 -D ray tracing traveltime fitting and calculation of synthetic seismograms are performed from DSS data on Wen'an -Yuxian -Qaharyouyizhongqi profile. The velocity structure and tectonics of the crust and upper manttle is determined. The result shows that velocity structure of the crust and upper mantle is obviously inhomgeneous in vertical and lateral directions- M-discontinuity undulates sharply, from a depth of 31km near Baxian in Jizhong depression westward to around 42km at Tianzhen in the north of Shanxi uplift. Shallow faults develop, and deep crustal faults are infered accord ing to the undu1ation of the corresponding deep crustal interfaces, velocity contours and wave group characteristics near the foult zone. |
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| Keywords: | crustal thickness M-discontinuity seismic sounding mantle structure |
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