摘要
南北地震带南段莫霍面局部特征差异大,引用Parker-Oldenburg迭代反演算法分别在常密度模型和变密度模型下对该地区莫霍面进行反演研究。结果表明,变密度和常密度模型下南北地震带南段莫霍面总体形态特征基本一致,变密度模型反演结果更为精细,在高山地区变密度反演结果偏深。南北地震带南段地区攀枝花幔隆与东川幔陷特征显著,深部作用对区域构造地震活动具有重要影响。
There are large differences of Moho local features in the southern area of the north south earth- quake beh. This article applies the Parker-Oldenburgiterative inversionmethod with constant density and vari able density models on the southern area of the north-south earthquake belt. The results indicate that the variable density model＇s reverse results are more reliable, and that the two reverse results＇ general morphologi- cal characteristics are consistent. Between the differences of theinversion results, the maximum difference is less than 2 km, and the results of the variable density model are much deeper. The mantle uplift in Panzhihua and the mantle concave in Dongchuan are extremely significant, indicating that deep geologic processes have important influence on regional tectonic earthquake activities.
出处
《大地测量与地球动力学》
CSCD
北大核心
2015年第6期931-935,共5页
Journal of Geodesy and Geodynamics
基金
中国地震局地震行业专项(201308004)
中国地震局地震研究所所长基金(201426144)
国家973计划(2013CB733304-2)
关键词
莫霍面
南北地震带
重力反演
深部构造
Moho
north-south earthquake belt
gravity inverse
deep structure
