极地研究

极地研究 ›› 1996, Vol. 8 ›› Issue (2): 62-67.

• 目次 • 上一篇    

南极重力场特征及界面的计算与解释

张赤军;蒋福珍;方剑;陆洋   

  • 出版日期:1996-06-30 发布日期:1996-06-30

CALCULATION OF THE MOHO DISCONTINUITY AND DISCUSSION OF FEATURE OF GRAVITY FIELD IN THE ANTARCTIC REGION

  • Online:1996-06-30 Published:1996-06-30

PDF (PC)

1020

被引次数

4

摘要：

本文根据ＯＳＵ９１Ａ地球重力场模型和地形资料，计算了南极洲的空间重力异常和布格重力异常，分析了空间重力异常变化剧烈的原因及其与高程的相关性，同时根据布格重力异常用两层界面的反演方法计算了冰盖厚度和地壳厚度，冰盖厚度较大的地区位于极区的东南部，而极区周围和西南部地区厚度较小。地壳较厚的地区位于极区的东南部，最大达５６ｋｍ，西南部地区地壳较薄，最小值为８ｋｍ。

关键词: 南极,重力场,空间重力异常,布格重力异常,地壳厚度,冰盖厚度

Abstract:

We calculated Bouguer gravity anomaly and free air gravity anomaly of the Antarctic region by using OSU91A potential model, and analyzed the cautions of the acute change of the free air anomaly and the correlation between the free air anomaly and height. Additionally,we calculated the ice thickness and the crustal thickness using free air anomaly data by means of the method of multi layer invertion which has been given by us.The results show that thicker ice region locates in eastern Antarctic region. The large undulation of crustal thickness concentrates in eastern Antarctic region, the thickest is 56km,and the thickness in western Antarctic region is thinner, about 8 km.