摘要
在分析重力异常与地壳厚度存在相关性的基础上,对全省1:500000重力资料采用多种窗口求平均重力场,进行相关分析,以选定最佳窗口,再与已知地震测深资料进行回归分析,推出本省新系数公式,反演编出准确度较高的湖南省莫霍面深度图。将其形态特征概括为:“一陡,一缓,二斜、二凹、三隆起”。指出它与现代地势有镜像对应关系,并提出武陵山区地壳失衡的见解。最后,探讨了莫霍面形态与岩浆岩侵入体、矿产间的联系。
Based on the analysis that the gravity anomaly is correlated with the Crustal thickness, the 1:500000 scale gravity data of the whole province is adopted to find the average gravity field with various windows. Through correlation analysis, an optimal window is selected, and then through regressive analysis with known seismic sounding data, new coefficients for the formula of the province are inferred. Through inversed deduction, a highly-accurate depth map of Moho discontinuity is worked out. Its morphological feature can be generalized as: one steep gradient zone, one gentle slope zone, two slopes, two depressions, three upheavals. And it is pointed out that these features are a mirror image corresponding to the modern landform and an anisostasy in Wuling mountain area is proposed out.Finally, the connection of the form of Moho dicontinuity with magmatic intrusion and distribution of mineral resources is discussed.
出处
《湖南地质》
1990年第2期10-18,共9页
Hunan Geology
关键词
莫霍面
康腊面
重力异常
地震测深
地壳厚度
Moho discontinuity
Conrad discontinaity
Gravety anomaly
Seismic sounding
Crustal thickness
