张家口-塘沽测线岩石圈有效弹性厚度研究
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摘要
岩石圈有效弹性厚度表征了岩石圈抵杭变形的能力,代表了岩石圈的综合强度,通过岩石圈有效弹性厚度的研究能揭示岩石圈丰富的热力学信息.本文收集分布在首都圈地区张家口-塘沽测线附近的16个大地热流数据,且结合该测线下的地壳结构,计算得到测线下方岩石圈的现今温度场剖面,并根据温度场计算得到其流变结构和有效弹性厚度.通过将有效弹性厚度与前人有关该测线下方震源深度的研究成果做对比,结果表明在有热流约束的地方有效弹性厚度大致对应约400-600℃的等温面,所有地震都发生在有效弹性厚度之上.
Lithospheric effective elastic thickness represents the ability of lithospheric resistance to deformation and its comprehensive strength. Abundant lithospheric thermodynamics information can be revealed through the research of the lithospheric effective elastic thickness. We collect 16 heat flow data from the Zhangjiakou-Tanggu survey line and use its crust structure to calculate its present lithosphric temperature profile. Its rheological structure and effective elastic thickness can be obtained from the temperature field. We compare the effective elastic thickness with the previous result of the focus depth under the survey line. The results show that the effective elastic thickness correspond to the 400-600℃ isothermal level around the heal flow restraint zone,and all the earthquakes occur above the effective elastic thickness.
Lithospheric effective elastic thickness represents the ability of lithospheric resistance to deformation and its comprehensive strength. Abundant lithospheric thermodynamics information can be revealed through the research of the lithospheric effective elastic thickness. We collect 16 heat flow data from the Zhangjiakou-Tanggu survey line and use its crust structure to calculate its present lithosphric temperature profile. Its rheological structure and effective elastic thickness can be obtained from the temperature field. We compare the effective elastic thickness with the previous result of the focus depth under the survey line. The results show that the effective elastic thickness correspond to the 400-600℃ isothermal level around the heal flow restraint zone,and all the earthquakes occur above the effective elastic thickness.
引文
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[14] Sclater J G, Jaupart C, Galson D. The heat flow through oceanic and continental crust and the heat loss of the earth[J]. Rev Geophys Space Phys, 1980, 18(1) :269-311．
[15] Ketcham R A. Distribution of heat producing elements in the upper and middle crust of southern and west central Arizona: Evidence from the core complexes [J]. J Gephys Res, 1996,101(B6) :13611-13632．
[16] 刘绍文,王良书,李成,等.塔里木北缘岩石圈热-流变结构及其地球动力学意义[J].中国科学(D辑),2003,33(9) :852-863． Liu S W, Wang L S, Li C, et al. The heat-rheological structure and dynamic meaning of the lithosphere in the north Tarim[J]. Scinece in China (Series D), 2003, 33(9) :852-863．
[17] 臧绍先,李昶,宁杰远,等.华北岩石圈三维流变结构的一种初步模型[J].中国科学(D辑),2002,32(7) :589-597． Zang S X, Li C, Ning J Y, et al. A primary model of three dimensional rheological structure of the lithosphere in North China[J]. Scinece in China (Series D) , 2002, 32(7) :589-597．
[18] Byerlee J D. Frictions of rocks [J]. Pure Appl Geophys, 1978, 116(4-5) :615-626．
[19] Ranalli G. Rheology of the Earth, deformation and flow processes in geophysics and geodynamics [M]. London , Sydney , Wellington :Boston Allen Unwin ,1987
[20] Kirby S H. Rheology of the lithosphere [J]. Rev Geophys Space Phys,1983(6) , 21: 1458-1487．
[21] Hopper J R, Buck W R. The initiation of the rifting at constant tectonic force; Role of diffusion creep [J]. J. Geophys. Res., 1993, 98(B9) :16213-16221．
[22] Ranalli G. Rheology of the crust and its role in tectonic reactivation [J]. Journal of Geodynamics,2000, 30(1) : 3-15．
[23] Ranalli G. Rheology of the lithosphere in space and time [A]. In:Burg J P, Ford M, ed. Orogeny Through Time[C]. Vol 121． London: The Geological Society, 1997,19-37．
[24] Miosio K, Kaikkonen P, Beekman F. Rheological structure and dynamic response of the DSS profile BALTIC in the SE Fennoscandian Shield [J]. Tectonophysics, 2000, 320(3-4) :175-194．
[2] McNutt M. Flexure reveals great depth [J]. Nature, 1990, 343(6259) :596-597．
[3] Burov E B, Diament M. The effective elastic thickness (Te) of continental lithosphere: What does it really mean? [J]. J. Geophys. Res., 1995, 100(B3) :3905-3927．
[4] 付永涛,李继亮,周辉,等.大陆岩石圈有效弹性厚度研究综述[J].地质评论,2000,46(2) :149-159． Fu Y T, Li J L, Zhou H, et al. Comments on the effective elastic thickness of continental lithosphere[J]. Geological Review,2000,46(2) :149-159．
[5] 刘绍文,王良书,龚玉玲,等.济阳坳陷岩石圈热流变学结构及其地球动力学意义[J].中国科学(D辑),2005,35(3) :203-214． Liu S W, Wang L S, Gong Y L, et al. The heat-rheological structure and dynamic meaning of the lithosphere in Jiyang depression[J]. Scinece in China (Series D), 2005, 35(3) :203-214．
[6] 马杏垣.中国岩石圈动力学地图集[M].北京:中国地图出版社,1989,61． Ma X Y. Lithospheric Dynamics Atlas of China [M]. Beijing: China Cartographic Publishing House, 1989, 61．
[7] 嘉世旭,张先康.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,2005,48(3) :611-620． Jia S X, Zhang X K. Crustal structure and comparison of different tectonic blocks in Nroth China [J]. Chinese Journal of geophysics, 2005, 48(3) : 611-620．
[8] 杨国华,谢觉民,韩月萍.华北主要构造单元及边界带现今水平形变与运动机制[J].地球物理学报,2001,44(5) :645-653． Yang G H, Xie J M,Han Y P. Current horizontal deformation and kinematic mechanism of major tectonic units and boundary zones in North China[J] Chinese Journal of geophysics, 2001,44(5) :645-653．
[9] 张亚明,孟补在,滕吉文.京津唐及邻区地壳结构的中生代构 造运动响应[J].地球物理学报,2008,51(4) :1123-1134． Zhang Y M, Meng P Z,Teng J W. Crustal structure and its tectonic response during Mesozoic and Cenozoic in Beijing-Tianjin-Tangshan and its adjacent region[J]. Chinese Journal of geophysics, 2008 ,51(4) :1123-1134．
[10] 顾功叙.中国地震目录[M].北京:地震出版社,1983． Gu G X. Catalogue of Chinese Earthquakes [J]. Beijing: Seismological Press, 1983．
[11] 祖金华,吴乾蕃,廉雨方.延庆怀来盆地及其邻区地热研究[J].地震学报,1997,19(4) :442-444． Zu J H, Wu Q F, Lian Y F. The thermal research of the Yanqing-Huailai basin and its adjacent area [J]. Acta Seismologica Sinica, 1997,19(4) :442-444．
[12] 胡圣标,何丽娟,汪集旸.中国大陆地区大地热流数据汇编(第三版)[J].地球物理学报,2001,44(5) :611-626． Hu S B, He L J, Wang J Y. Compilation of heat flow data in the China continental area(3~(rd) edition) [J]. Chinese Journal of geophysics, 2001, 44(5) :611-626．
[13] 臧绍先,刘永刚,宁杰远.华北地区岩石圈热结构的研究[J].地球物理学报,2002,45(1) :56-66． Zang S X, Liu Y G, Ning J Y. Thermal structure of the lithosphere in North China [J]. Chinese Journal of geophysics, 2002,45(1) :56-66．
[14] Sclater J G, Jaupart C, Galson D. The heat flow through oceanic and continental crust and the heat loss of the earth[J]. Rev Geophys Space Phys, 1980, 18(1) :269-311．
[15] Ketcham R A. Distribution of heat producing elements in the upper and middle crust of southern and west central Arizona: Evidence from the core complexes [J]. J Gephys Res, 1996,101(B6) :13611-13632．
[16] 刘绍文,王良书,李成,等.塔里木北缘岩石圈热-流变结构及其地球动力学意义[J].中国科学(D辑),2003,33(9) :852-863． Liu S W, Wang L S, Li C, et al. The heat-rheological structure and dynamic meaning of the lithosphere in the north Tarim[J]. Scinece in China (Series D), 2003, 33(9) :852-863．
[17] 臧绍先,李昶,宁杰远,等.华北岩石圈三维流变结构的一种初步模型[J].中国科学(D辑),2002,32(7) :589-597． Zang S X, Li C, Ning J Y, et al. A primary model of three dimensional rheological structure of the lithosphere in North China[J]. Scinece in China (Series D) , 2002, 32(7) :589-597．
[18] Byerlee J D. Frictions of rocks [J]. Pure Appl Geophys, 1978, 116(4-5) :615-626．
[19] Ranalli G. Rheology of the Earth, deformation and flow processes in geophysics and geodynamics [M]. London , Sydney , Wellington :Boston Allen Unwin ,1987
[20] Kirby S H. Rheology of the lithosphere [J]. Rev Geophys Space Phys,1983(6) , 21: 1458-1487．
[21] Hopper J R, Buck W R. The initiation of the rifting at constant tectonic force; Role of diffusion creep [J]. J. Geophys. Res., 1993, 98(B9) :16213-16221．
[22] Ranalli G. Rheology of the crust and its role in tectonic reactivation [J]. Journal of Geodynamics,2000, 30(1) : 3-15．
[23] Ranalli G. Rheology of the lithosphere in space and time [A]. In:Burg J P, Ford M, ed. Orogeny Through Time[C]. Vol 121． London: The Geological Society, 1997,19-37．
[24] Miosio K, Kaikkonen P, Beekman F. Rheological structure and dynamic response of the DSS profile BALTIC in the SE Fennoscandian Shield [J]. Tectonophysics, 2000, 320(3-4) :175-194．
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