重磁数据在东海陆架盆地构造格架划分中的应用
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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.
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.
引文
[1]杨艳秋,李刚,戴春山.东海陆架盆地西部坳陷带中生界分布特征及其有利区探讨[J].世界地质,2011,30(3):396-403.YANG Yan-qiu,LI Gang,DAI Chun-shan.Characteristics of Mesozoic distribution and discussion on its favorable area in western depression zone of East China Sea shelf basin[J].Global Geology,2011,30(3):396-403.
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[8]万阔,孙晓猛,何松,等.佳伊断裂带晚白垩世走滑-逆冲事件的新证据[J].世界地质,2017,36(2):486-495.WAN Kuo,SUN Xiao-meng,HE Song,et al.New evidence of Late Cretaceous strike-slip thrust event in Jiamusi-Yitong fault zone[J].Global Geology,2017,36(2):486-495.
[9]Cooper G R J,Cowan D R.Edge enhancement of potential-field data using normalized statistics[J].Geophysics,2008,73(3):H1-H4.
[10]Ma G Q.Edge detection of potential field data using improved local phase filter[J].Exploration Geophysics,2013,44(1):36-41.
[11]Miller H G,Singh V.Potential field tilt:a new concept for location of potential field sources[J].Journal of Applied Geophysics,1994,32:213-217.
[12]Roest W R,Verhoef J,Pilkington M.Magnetic interpretation using the 3-D analytic signal[J].Geophysics,1992,57:116-125.
[13]Wijns C,Perez C,Kowalczyk P.Theta map:edge detection in magnetic data[J].Geophysics,2005,70(4):L39-L43.
[14]Cooper G R J,Cowan D R.Enhancing potential field data using filters based on the local phase[J].Computers&Geosciences,2006,32:1585-1591.
[15]Ma G Q,Huang D N,Liu C.Step--Edge detection filters for the interpretation of potential field data[J].Pure and Applied Geophysics,2016,173(3):795-803.
[16]Ma G Q,Liu Cai,Huang D N.The removal of additional edges in the edge detection of potential field data[J].Journal of Applied Geophysics,2015,114:168-173.
[17]Ma G Q,Liu C,Li L L.Balanced horizontal derivative of potential field data to recognize the edges and estimate location parameters of the source[J].Journal of Applied Geophysics,2014,108:12-18.
[2]贾军涛,郑洪波.东海的形成与构造演化[J].海洋地质动态,2010,26(1):1-5.JIA Jun-tao,ZHENG Hong-bo.Formation and tectonic evolution of the East China Sea[J].Marine Geology Letters,2010,26(1):1-5.
[3]龚建明,李刚,杨传胜,等.东海陆架盆地南部中生界分布特征与油气勘探前景[J].吉林大学学报(地球科学版),2013,43(1):20-27.GONG Jian-ming,LI Gang,YANG Chuan-sheng,et al.Hydrocarbon prospecting of Mesozoic strata in southern East China Sea shelf basin[J].Journal of Jilin University(Earth Science Edition),2013,43(1):20-27.
[4]刘泽,戴黎明,李三忠,等.东海陆架盆地南部中生代成盆过程的数值模拟[J].海洋地质与第四纪地质,2017,37(4):167-180.LIU Ze,DAI Li-ming,LI San-zhong,et al.Numerical simulation of Mesozoic tectonic processes in the southern part of East China Sea continental shelf basin[J].Marine Geology and Quaternary Geology,2017,37(4):167-180.
[5]梁若冰.东海陆架盆地南部中生界分布浅析[J].海洋石油,2012,32(3):18-22.LIANG Ruo-bing.The distribution of Mesozoic in the southern part of East China Sea shelf basin[J].Offshore Oil,2012,32(3):18-22.
[6]何家雄,张伟,颜文,等.中国近海盆地幕式构造演化及成盆类型与油气富集规律[J].海洋地质与第四纪地质,2014,34(2):121-134.HE Jia-xiong,ZHANG Wei,YAN Wen,et al.Episodic tectonic evolution basin types and hydrocarbon accumulation in Chinese marginal basins[J].Marine Geology and Quaternary Geology,2014,34(2):121-134.
[7]刘敬寿,戴俊生,杨海盟,等.一种计算断裂信息维的方法及其应用[J].世界地质,2015,34(3):684-689.LIU Jing-shou,DAI Jun-sheng,YANG Hai-meng,et al.A method for calculating fault information dimension and its application[J].Global Geology,2015,34(3):684-689.
[8]万阔,孙晓猛,何松,等.佳伊断裂带晚白垩世走滑-逆冲事件的新证据[J].世界地质,2017,36(2):486-495.WAN Kuo,SUN Xiao-meng,HE Song,et al.New evidence of Late Cretaceous strike-slip thrust event in Jiamusi-Yitong fault zone[J].Global Geology,2017,36(2):486-495.
[9]Cooper G R J,Cowan D R.Edge enhancement of potential-field data using normalized statistics[J].Geophysics,2008,73(3):H1-H4.
[10]Ma G Q.Edge detection of potential field data using improved local phase filter[J].Exploration Geophysics,2013,44(1):36-41.
[11]Miller H G,Singh V.Potential field tilt:a new concept for location of potential field sources[J].Journal of Applied Geophysics,1994,32:213-217.
[12]Roest W R,Verhoef J,Pilkington M.Magnetic interpretation using the 3-D analytic signal[J].Geophysics,1992,57:116-125.
[13]Wijns C,Perez C,Kowalczyk P.Theta map:edge detection in magnetic data[J].Geophysics,2005,70(4):L39-L43.
[14]Cooper G R J,Cowan D R.Enhancing potential field data using filters based on the local phase[J].Computers&Geosciences,2006,32:1585-1591.
[15]Ma G Q,Huang D N,Liu C.Step--Edge detection filters for the interpretation of potential field data[J].Pure and Applied Geophysics,2016,173(3):795-803.
[16]Ma G Q,Liu Cai,Huang D N.The removal of additional edges in the edge detection of potential field data[J].Journal of Applied Geophysics,2015,114:168-173.
[17]Ma G Q,Liu C,Li L L.Balanced horizontal derivative of potential field data to recognize the edges and estimate location parameters of the source[J].Journal of Applied Geophysics,2014,108:12-18.