摘要
针对现有重磁构造识别深部地质体分辨率低的情况,提出改进局部相位边界识别技术,采用不同阶水平导数的比值函数有效地均衡不同深度构造的响应,提高了对深部地质体的分辨能力。理论模型试验表明改进局部相位边界识别技术能更加清晰和准确地识别地质体边界,且受噪声干扰较小。利用改进局部相位边界识别技术对东海陆架盆地重磁数据进行构造识别,并比照欧拉反褶积结果进行断裂划分,结合东海基底反演结果和地质资料给定东海陆架盆地的边界和主干构造格架。
To improve the low resolution of the existing structure identification method,the authors present improved local phase edge detection technique,which uses the ratio function of different order horizontal derivatives to balance the amplitude of the structures at different depths,and improve the resolution on deeper structures.The model tests show that the improved local phase edge detection technique can detect the edges of geological bodies more clearly and accurately and is insensitive to noise.Moreover the improved local phase edge detection technique is applied to East China Sea shelf basin to detect the faults and to delineate the basin edges and major tectonic framework by comparing with the Euler deconvolution results of gravity data,and integrating basement inversion results and geological data.
作者
胡森清
明彦伯
姚刚
HU Sen-qing;MING Yan-bo;YAO Gang(Shanghai Branch of China National Offshore Oil Corporation Limited, Shanghai 200030, China;College of Geo-exploration Science and Technology, Jilin University, Changchun 130021, China)
出处
《世界地质》
CAS
2018年第2期579-584,共6页
World Geology
基金
国家油气重大专项子任务(2016ZX05027-002-003)
国家重点研发计划课题(2017YFC0602203
2017YFC0601606)
国家自然科学基金项目(41604098)和国家自然科学基金重点项目(41430322)联合资助
关键词
重磁
东海
局部相位
构造
gravity and magnetic
East China Sea
local phase
structure
