摘要
利用首都圈地区的高精度高程数据,通过Airy均衡补偿模型计算出莫霍面的深度,进一步运用Parker公式计算出地壳所产生的重力异常值。然后从实际布格重力异常观测值中减去均衡校正值,得到该地区的均衡异常值。通过对首都圈地区的均衡重力异常进行分析,讨论了该地区的均衡状态。研究结果表明,首都圈大部分地区基本处于重力均衡状态,非均衡区域多集中在首都圈的西部和北部山区。
By using the elevation data and Airy model,the Moho depth can be calculated.Through applying Parker’s formula,the isostasy gravity correction of the crustal deformation can be obtained as well.Therefore,the isostasy gravity anomalies gained by subtracting the corrections from observed Bouguer anomalies approximately represent the isostatic features of Chinese capital area,which plays an important role for investgating the deep structure and earthquake prediction in the future.The results show that the isostatic value which is of around ±20×10-5ms-2 in eastern part of capital and its adjacent areas,indicates that basically isostatic has been reached,while some places in west and north of capital area are still in unisostitc status.
出处
《大地测量与地球动力学》
CSCD
北大核心
2011年第5期44-46,共3页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40774073
40774074)
国家重点基础研究发展计划(973)项目(2007CB209607)
湖北省教育厅优秀中青年基金(Q20081206)
关键词
首都圈地区
Airy均衡模型
均衡异常
布格重力异常
高程数据
Chinese Capital circle aera
Airy isostasy model
isostasy gravity anomaly
Bouguer anomaly
topography data
