利用EGM2008模型和地面实测重力资料反演川滇地区构造应力场
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摘要
分别利用EGM2008模型和地面实测重力资料反演川滇地区构造应力场,并总结分析川滇地区构造应力场特征。结果表明,EGM2008模型和地面实测重力资料的反演结果较为一致;川滇地区构造应力场复杂,龙门山断裂带和嘉黎断裂带地区构造应力分布明显、聚集程度高,构造应力均值也较大,反映了该地区构造运动活跃,与地震历史资料相对应。
There is a close relationship between gravity and tectonic stress.The tectonic stress field in Sichuan-Yunnan area is computed with the EGM2008 gravity model and ground gravity observation data respectively.Characteristics of the tectonic stress field in the Sichuan-Yunnan area are summarized.The results show that the inversion results are consistent.The tectonic stress field in SichuanYunnan area is complicated.Tectonic stress distribution is gathered in high degree obviously in the Longmenshan and the Jiali fault zones,where average tectonic stress is higher than in other zones.The tectonic stress results observed in the Longmenshan and Jiali fault zones reflect that the tectonic movement is active in the region and corresponds with historical earthquake data.
引文
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