利用重力多尺度分解资料反演青藏高原东北缘地壳厚度
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摘要
通过重力异常分解模型,选用小波基函数"bior3.7",分解得出青藏高原东北缘布格重力异常资料的小波4阶近似成分,利用其主要由莫霍面产生的布格重力异常,以6条人工地震剖面信息做初始控制条件,反演得出青藏高原东北缘的地壳厚度。
With a gravity anomalies decomposition model,and through using the wavelet function "bior3.7",the fourth order wavelet approximate components of the Bouger gravity anomalies of northeast margin of the Qinghai-Tibetan Plateau can be obtained.Furthermore,by utilizing the Bouger gravity anomalies come from the Moho and taking the information from the 6 artificial profiles as the initial control conditions,the crustal thickness of northeastern margin of the Qinghai-Tibetan Plateau is inversed,and the inversion results are analyzed and discussed according to the crustal thickness distribution features.
With a gravity anomalies decomposition model,and through using the wavelet function "bior3.7",the fourth order wavelet approximate components of the Bouger gravity anomalies of northeast margin of the Qinghai-Tibetan Plateau can be obtained.Furthermore,by utilizing the Bouger gravity anomalies come from the Moho and taking the information from the 6 artificial profiles as the initial control conditions,the crustal thickness of northeastern margin of the Qinghai-Tibetan Plateau is inversed,and the inversion results are analyzed and discussed according to the crustal thickness distribution features.
引文
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2陈学波,等.中国及外围地区莫霍面深度分布图[M].北京:地震出版社,2001.(Chen Xuebo,et al.Map of Mohodepth of China and its adjacent areas[M].Beijing:Seismo-logical Press,2001)
3周民都,等.青藏高原东北缘地质构造背景及地壳结构研究[J].地震学报,2000,22(6):645-653.(Zhou Mindou,et al.The geological structure background and the crustalstructure in the northeastern margin of the Qinghai-Tibetanplateau[J].Acta Seismologica Sinica,2000,22(6):645-653)
4杨文采,等.离散小波变换与重力异常多重分解[J].地球物理学报,2001,44(4):534-541.(Yang Wencai,et al.Discrete wavelet transform for multiple decomposition ofgravity anomalies[J].Chinese Journal of Geophysics,2001,44(4):534-541)
5王椿镛,林中洋,陈学波.青海门源-福建宁德地学断面综合地球物理研究[J].地球物理学报,1995,38(5):590-598.(Wang Chongyong,Lin Zhongyang and Chen Xuebo.Comprehensive study of geophysics on geoscience transectfrom Menyuan Qinghai province to Ningde Fujian provinceChina[J].Chinese Journal of Geophysics,1995,38(5):590-598)
6孙武城,徐杰,杨主恩.上海奉贤至内蒙古阿拉善左旗地学断面[M].北京:地震出版社.1992.(Sun Wucheng,XuJie and Yang Zhuen.Geoscience transection from Fengxianin Shanghai to Alxa Zuoqi in Inner Mongolia AutonomousRegion[M].Beijing:Seismological Press,1992)
7闵祥仪,等.灵台-阿木去乎剖面地壳速度结构[J].西北地震学报(S1),1991,(S1):32-39.(Min Xiangyi,et al.The crustal velocity structure in Lingtai-Amuquhu profile[J].Journal of Northwestern Seismological,1991,(S1):32-39)
8李清河,等.成县-西吉剖面地壳速度结构[J].西北地震学报,1991,(S1):37-43.(Li Qinghe,et al.The velocitystructure of Chengxian-Xiji profile[J].Journal of Northwest-ern Seismological,1991,(S1):37-43)
9李松林,等.西吉-中卫地震测深剖面及其解释[J].地震地质,2001,23(1):86-92.(Li Songlin,et al.Seismicsounding profile and its interpretation in the region of Xiji-Zhongwei[J].Seismology and Geology,2001,23(1):86-92)
10李松林,等.玛沁-兰州-靖边地震测深剖面地壳速度结构的初步研究[J].地球物理学报,2002,45(2):211-217.(Li Songlin,et al.A preliminary study on the crustalvelocity structure of Maqin-Lanzhou-Jingbian by means ofdeep seismic sounding profile[J].Chinese Journal of Geo-physics,2002,45(2):211-217)
11傅容珊.重力资料频率域反演三维地壳结构[J].中国科技大学学报,1988,(4):523-527.(Fu Rongshan.A nu-merical experiment to inverse three dimentional crustalstructure infrequence region by using gravitational data[J].Journal of University of Science and Technology of China,1988,(4):523-527)
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