由诸城-宜川人工地震剖面反演结果看太行山两侧岩石圈结构的差异
摘要
利用诸城-宜川人工地震折射/宽角反射剖面的资料,得到了华北克拉通南部岩石圈二维速度结构.结果表明,太行山东西两侧岩石圈结构存在着巨大的差异.东侧较薄,为70～80km;西侧较厚,为85～120km.在太行山重力梯度带附近,岩石圈厚度出现了约30km的突变.岩石圈地幔和下地壳介质的P波速度值东侧较低,西侧较高.东侧的中下地壳内存在不同尺度的低速体,西侧则尚未发现.这些差异表明,太行山重力梯度带也是一条岩石圈厚度突变带和岩石成分分隔带.根据Pm波的波形特点,推测东部地区的莫霍面不再是一个尖锐的间断面,而是一个复杂的过渡带.初步分析认为,上地幔物质的热机械-化学侵蚀作用是引起太行山东侧岩石圈减薄和破坏的主要机制,太平洋板块俯冲是改变华北克拉通岩石圈地幔性质的重要动力学因素.
引文
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22王峻,刘启元,陈九辉,等.根据接收函数反演得到的首都圈地壳上地幔三维S波速度结构.地球物理学报,2009,52:2472-2482
23汪洋.华北和华南岩石圈热状态、流变学特征与地壳成分.北京:地质出版社,2006.4-21
24刘若新.中国新生代火山岩年代学和地球化学.北京:地震出版社,1992.1-427
25 Menzies M A,Fan W M,Zhang M.Palaeozoic and Cenozoic lithoprobes and the loss of>120 km of Archaean lithosphere,Sino-Korean Craton,China.In:Prichard H M,Alabaser T,Harris N B W,et a1,eds.Magmatic Processes and Plate Tectonics.Geol Soc Spe Pub London, 1993,76:71-78
26 Xu Y G.Thermo-tectonic destruction of the Arehaean lithospheric keel beneath eastern China:Evidence,timing and mechanism.Phys Chem Earth,2001,26:747-757
27 Deng J F,Mo X X,Zhao H L,et a1.A new mode1 for the dynamic evolution of Chinese lithosphere:‘Continental roots-plume tectonics’. Earth-Sci Rev,2004,65:223-275
28 Griffin W L,Zhang A D,O’Rreilly S Y,et a1.Phanerozoic evolution of the lithosphere beneath the Sino-Korean Craton.In:Flower M, Chung S L,Lo C H,et a1.Mantle Dynamics and Plate Interactions in East Asia.Am Gephys Union Geodyn,1998,27:107-126
29朱日祥,郑天愉.华北克拉通破坏机制与元古代古板块构造体系.科学通报,2009,54:1950-1961
30 Huang J L,Zhao D P.High-resolution mantle tomography of China and surrounding regions.J Geophys Res,2006,111:B09305,doi:10.1029/2005JB004066
31 Zhao D P,Mishra O P,Sanda R.Influence of fluids and magma on earthquakes:Seismological evidence.Phys Earth Planet Inter,2002,132: 249-267
32 Zhang H,Nakamura E,Sun M,et al.Transformation of subcontinental lithospheric mantle through peridotite-melt reaction:Evidence from a highly fertile mantle xenolith from the North China Craton.Int Geol Rev,2007,49:658-679
2邓晋福,魏文博,等.中国华北地区岩石圈三维结构及演化.北京:地质出版社,2007.1-276
3 Ye H,Zhang R,Mao F.The Cenozoic tectonic evolution of the Great North China:Two types of rifting and crustal necking in the Great North China and their tectonic implications.Tectonophysics,1987,133:217-227
4 Liu M,Cui X,Liu F.Cenozoic rifting and volcanism in eastern China:A mantle dynamic link to the Indo-Asian collision.Tectonophysics, 2004,393:29-42
5 Xu,Y G,Chung S L,Ma J,et a1.Contrasting Cenozoic lithospheric evolution and architecture in western and eastern Sino-Korean Craton: Constraints from geochemistry of basalts and mantle xenoliths.J Geol,2004,l12:593-605
6徐义刚.太行山重力梯度带的形成与华北岩石圈减薄的时空差异性有关.地球科学,2006,31:14-22
7邓起东.中国活动构造图.北京:地震出版社,2007
8赖晓玲,张先康,李松林,等.小波多分辨分析在壳幔非均匀尺度研究中的应用.地球物理学报,2003,46:47-53
9李松林,樊计昌,吴宁远.地震测深资料解释的新方法.北京:地震出版社,2006
10 Chen L.Lithospheric structure variations between the eastern and central North China Craton from S-and P-receiver function migration. Phys Earth Planet Inter,2009,173:216-227
11 Chen L,Zheng T Y,Xu W W.A thinned lithospheric image of the Tanlu Fault Zone,eastern China:Constructed from wave equation based receiver function migration.J Geophys Res,2006,111:B09312,doi:10.1029/2005JB003974
12 Xu P F,Zhao D P.Upper-mantle velocity structure beneath the North China Craton:Implications for lithospheric thinning.Geophys J Int, 2009,177:12797-1283,doi:10.1111/j.1365-246X.2009.04120.x
13郑建平.不同时空背景幔源物质对比与华北深部岩石圈破坏和增生置换过程.科学通报,2009,54:1990-2007
14张宏福,周新华,范蔚茗,等.华北东南部中生代岩石圈地幔性质、组成、富集过程及其形成机理.岩石学报,2005,21:1271-1280
15房立华,吴建平,吕作勇.华北地区基于噪声的瑞利面波群速度层析成像.地球物理学报,2009,52:663-671
16房立华,吴建平.背景噪声频散曲线测定及其在华北地区的应用.地震学报,2009,31:544-554
17吴福元,徐义刚,高山,等.华北岩石圈减薄与克拉通破坏研究的主要学术争论.岩石学报,2008,24:1145-1174
18 Menzies M,Xu Y,Zhang H,et al.Integration of geology,geophysics and geochemistry:A key to understanding the North China Craton.Lithos,2007,96:1-21
19 Zheng T Y,Zhao L,Zhu R X.Insight into the geodynamics of cratonic reactivation from seismic analysis of the crust-mantle boundary. Geophys Res Lett,2008,35:L08303,doi:10.1029/2008GL033439
20 Gao S,Rudnick R,Yuan H,et al.Recycling lower continental crust in the North China Craton.Nature,2004,432:892-897
21刘启元,王峻,陈九辉,等.1976年唐山大地震的孕震环境:密集地震台阵观测得到的结果.地学前缘,2007,14:205-213
22王峻,刘启元,陈九辉,等.根据接收函数反演得到的首都圈地壳上地幔三维S波速度结构.地球物理学报,2009,52:2472-2482
23汪洋.华北和华南岩石圈热状态、流变学特征与地壳成分.北京:地质出版社,2006.4-21
24刘若新.中国新生代火山岩年代学和地球化学.北京:地震出版社,1992.1-427
25 Menzies M A,Fan W M,Zhang M.Palaeozoic and Cenozoic lithoprobes and the loss of>120 km of Archaean lithosphere,Sino-Korean Craton,China.In:Prichard H M,Alabaser T,Harris N B W,et a1,eds.Magmatic Processes and Plate Tectonics.Geol Soc Spe Pub London, 1993,76:71-78
26 Xu Y G.Thermo-tectonic destruction of the Arehaean lithospheric keel beneath eastern China:Evidence,timing and mechanism.Phys Chem Earth,2001,26:747-757
27 Deng J F,Mo X X,Zhao H L,et a1.A new mode1 for the dynamic evolution of Chinese lithosphere:‘Continental roots-plume tectonics’. Earth-Sci Rev,2004,65:223-275
28 Griffin W L,Zhang A D,O’Rreilly S Y,et a1.Phanerozoic evolution of the lithosphere beneath the Sino-Korean Craton.In:Flower M, Chung S L,Lo C H,et a1.Mantle Dynamics and Plate Interactions in East Asia.Am Gephys Union Geodyn,1998,27:107-126
29朱日祥,郑天愉.华北克拉通破坏机制与元古代古板块构造体系.科学通报,2009,54:1950-1961
30 Huang J L,Zhao D P.High-resolution mantle tomography of China and surrounding regions.J Geophys Res,2006,111:B09305,doi:10.1029/2005JB004066
31 Zhao D P,Mishra O P,Sanda R.Influence of fluids and magma on earthquakes:Seismological evidence.Phys Earth Planet Inter,2002,132: 249-267
32 Zhang H,Nakamura E,Sun M,et al.Transformation of subcontinental lithospheric mantle through peridotite-melt reaction:Evidence from a highly fertile mantle xenolith from the North China Craton.Int Geol Rev,2007,49:658-679
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