利用接收函数研究鄂尔多斯东缘地壳上地幔结构
|
摘要
由1876个远震三分量P波地震图组成的数据集,取自布置于鄂尔多斯—太行山一线的宽频带流动台站。通过阵列反卷积方法,得到地下界面响应的接收函数,并通过共转换点偏移叠加得到地下结构的图像。图像显示,从鄂尔多斯至渤海湾盆地地壳厚度总体上逐渐变薄,Moho面总体呈小角度向西倾斜。鄂尔多斯块体中部地壳最厚,达到52km,向东到鄂尔多斯边缘,地壳厚度减小至43km。太行山至渤海湾盆地地壳厚度从45km减小至37km。山西地堑下方Moho面上隆,和两边的Moho面相比,抬升8～10km,且其Moho面的上隆和新生代地堑的凹陷呈镜像关系。
A data set of 1876 three-component,P wave seismograms from 22 stations deployed at Ordos and Taihang mountains was collected to investigate crust and upper mantle structure of that area. By using the array deconvolution method,the vertical,radial,and tangential receiver functions of all events are obtained. All radial receiver functions are then migrated to produce a seismic image. The image shows that from Ordos to Bohai Bay basin,the crust becomes thinner from about 52 km to 37 km,and the Moho generally dips to the west at a small angle. In central part of Ordos basin,the crust is thickest,reaching 52 km;at the eastern edge of Ordos,the thickness decreases to 43 km. From Taihang Mountain to Bohai Bay basin,the thickness of the crust changes from 45 km to 37 km. Under the Shanxi Graben,the Moho suddenly uplifts by approximately 8-10 km in comparison to that of both sides,and the rise of the Moho and the depression of the surface show a mirror-image relationship.
A data set of 1876 three-component,P wave seismograms from 22 stations deployed at Ordos and Taihang mountains was collected to investigate crust and upper mantle structure of that area. By using the array deconvolution method,the vertical,radial,and tangential receiver functions of all events are obtained. All radial receiver functions are then migrated to produce a seismic image. The image shows that from Ordos to Bohai Bay basin,the crust becomes thinner from about 52 km to 37 km,and the Moho generally dips to the west at a small angle. In central part of Ordos basin,the crust is thickest,reaching 52 km;at the eastern edge of Ordos,the thickness decreases to 43 km. From Taihang Mountain to Bohai Bay basin,the thickness of the crust changes from 45 km to 37 km. Under the Shanxi Graben,the Moho suddenly uplifts by approximately 8-10 km in comparison to that of both sides,and the rise of the Moho and the depression of the surface show a mirror-image relationship.
引文
嘉世旭,张先康.2005.华北不同构造块体地壳结构及其对比研究[J].地球物理学报,48(3):611-620.
潘桂棠,肖庆辉,陆松年,等.2009.中国大地构造单元划分[J].中国地质,36(1):1-28.
唐有彩,冯永革,陈永顺,等.2010.山西断陷带地壳结构的接收函数研究[J].地球物理学报,53(9):2102-2109.
杨进辉,吴福元.2009.华北东部三叠纪岩浆作用与克拉通破坏[J].中国科学(D辑),39(7):910-921.
张岳桥,廖昌珍,施炜,等.2006.鄂尔多斯盆地周边地带新构造演化及其区域动力学背景[J].高校地质学报,12(3):285-297.
Bosto ck M G.2007.Theory and observations-teleseismic body-wave scattering and receiver-side structure[G]//Treatise on Geophysics,Vol1:Seismology and Structure of the Earth(Eds.Dziewonski A M,Romanowicz B.),Elsevier:219-246.
Bosto ck M G.2004.Green,s functions,source signatures,and the normalization of teleseismic wave fields[J].J.Geophys.Res.,B03303.
Huang J and Zhao D.2006.High-resolution mantle tomography of China and surrounding regions[J].J.Geophys.Res.,111:B09305.
Jia S hixu and Zhang Xiankang.2005.Crustal structure and comparison of dfferent tectonic block in North China[J].Chinese J.Geophys.48(3):611-620.(in Chinese with English abstract)
Lang ston C A.1979.Structure under mount rainier,Washington,inferred from teleseismic body waves[J].J.Geophys.,Res.,84(B9):4749-4762.
Lang ston C A and Hammer J K.2001.The vertical component P-wave receiver function[J].Bull.Seism.Soc.Am.,91:1805-1819.
Li X Q and Nabelek J L.1999.Deconvolution of teleseismic body wavesfor enhancing structure beneath a seismometer array[J].Bull.Seism.Soc.Am.,89(1):190-201.
Pan G uitang,Xiao Qinghui,Lu Songnian,et al.2009.Subdivision of tectonic units in China[J].Geology in China,36(1):1-28.(in Chinese with English abstract)
Song B,Nutman A P,Liu D,et al.1996.3800to2500Ma crustal evolution in Anshan area of Liaoning Province,Northeastern China[J].Precambrian Res.,78:79-94.
Tang Yongcai,Feng Yongge,Chen Yongshun,et al.2010.Receiver function amalysis at Shanxi Rift[J].Chinese J.Geophys.,53(9):2102-2109.(in Chinese with English abstract)
Tian X B,Teng J W,Zhang H S,et al.2011.Structure of crust and upper mantle beneath the Ordos Block and the Yinshan Mountains revealed by receiver function analysis[J].Physics of the Earth and Planetary Interiors,184:186-193.
Vinni k L P.1977.Detection of waves converted from P to SV in the mantle[J].Phys.Earth Planetary Inter.,15:39-45.
Yang Jinhui and Wu Fuyuan.2009.Triassic magmatism and its relation to decratonization in the eastern North China Craton[J].Sci China(D),52:910-921.(in Chinese)
Zhao G.2001.Paleoproterozoic assembly of the North China Craton[J].Geol.Mag.,138(1):89-91.
Zhao G,Sun M and Wilde S A.2003.Major tectonic units of the North China Craton and their Paleoproterozoic assembly[J].Science in China(D),46(1):23-38.
Zhao L and Zheng T.2005.Using shear wave splitting measurements to investigate the upper mantle anisotropy beneath the North China Craton:Distinct variation from east to west[J].Geophys.Res.Lett.,32:L10309.
Zhang Yueqiao,Liao Changzhen,Shi Wei,et al.2006.Neotectonic evolution of the peripheral zone of the Ordos Basin and geodynamic setting[J].Geological Journal of China Universities,12(3):285-297.(in Chinese with English abstract)
潘桂棠,肖庆辉,陆松年,等.2009.中国大地构造单元划分[J].中国地质,36(1):1-28.
唐有彩,冯永革,陈永顺,等.2010.山西断陷带地壳结构的接收函数研究[J].地球物理学报,53(9):2102-2109.
杨进辉,吴福元.2009.华北东部三叠纪岩浆作用与克拉通破坏[J].中国科学(D辑),39(7):910-921.
张岳桥,廖昌珍,施炜,等.2006.鄂尔多斯盆地周边地带新构造演化及其区域动力学背景[J].高校地质学报,12(3):285-297.
Bosto ck M G.2007.Theory and observations-teleseismic body-wave scattering and receiver-side structure[G]//Treatise on Geophysics,Vol1:Seismology and Structure of the Earth(Eds.Dziewonski A M,Romanowicz B.),Elsevier:219-246.
Bosto ck M G.2004.Green,s functions,source signatures,and the normalization of teleseismic wave fields[J].J.Geophys.Res.,B03303.
Huang J and Zhao D.2006.High-resolution mantle tomography of China and surrounding regions[J].J.Geophys.Res.,111:B09305.
Jia S hixu and Zhang Xiankang.2005.Crustal structure and comparison of dfferent tectonic block in North China[J].Chinese J.Geophys.48(3):611-620.(in Chinese with English abstract)
Lang ston C A.1979.Structure under mount rainier,Washington,inferred from teleseismic body waves[J].J.Geophys.,Res.,84(B9):4749-4762.
Lang ston C A and Hammer J K.2001.The vertical component P-wave receiver function[J].Bull.Seism.Soc.Am.,91:1805-1819.
Li X Q and Nabelek J L.1999.Deconvolution of teleseismic body wavesfor enhancing structure beneath a seismometer array[J].Bull.Seism.Soc.Am.,89(1):190-201.
Pan G uitang,Xiao Qinghui,Lu Songnian,et al.2009.Subdivision of tectonic units in China[J].Geology in China,36(1):1-28.(in Chinese with English abstract)
Song B,Nutman A P,Liu D,et al.1996.3800to2500Ma crustal evolution in Anshan area of Liaoning Province,Northeastern China[J].Precambrian Res.,78:79-94.
Tang Yongcai,Feng Yongge,Chen Yongshun,et al.2010.Receiver function amalysis at Shanxi Rift[J].Chinese J.Geophys.,53(9):2102-2109.(in Chinese with English abstract)
Tian X B,Teng J W,Zhang H S,et al.2011.Structure of crust and upper mantle beneath the Ordos Block and the Yinshan Mountains revealed by receiver function analysis[J].Physics of the Earth and Planetary Interiors,184:186-193.
Vinni k L P.1977.Detection of waves converted from P to SV in the mantle[J].Phys.Earth Planetary Inter.,15:39-45.
Yang Jinhui and Wu Fuyuan.2009.Triassic magmatism and its relation to decratonization in the eastern North China Craton[J].Sci China(D),52:910-921.(in Chinese)
Zhao G.2001.Paleoproterozoic assembly of the North China Craton[J].Geol.Mag.,138(1):89-91.
Zhao G,Sun M and Wilde S A.2003.Major tectonic units of the North China Craton and their Paleoproterozoic assembly[J].Science in China(D),46(1):23-38.
Zhao L and Zheng T.2005.Using shear wave splitting measurements to investigate the upper mantle anisotropy beneath the North China Craton:Distinct variation from east to west[J].Geophys.Res.Lett.,32:L10309.
Zhang Yueqiao,Liao Changzhen,Shi Wei,et al.2006.Neotectonic evolution of the peripheral zone of the Ordos Basin and geodynamic setting[J].Geological Journal of China Universities,12(3):285-297.(in Chinese with English abstract)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心