1.0GPa和常温至1100 ℃条件下角闪石斜长片麻岩的V_p变化:实验测量与理论计算
|
摘要
在1.0GPa、常温至1100℃条件下测量了角闪石斜长片麻岩的纵波速度(V_P),并统计了不同温度实验产物中各种矿物的体积百分含量。结果显示,1.0GPa下,角闪石斜长片麻岩的V_P首先随温度升高(室温至700℃)缓慢降低约6%,然后(700～850℃)快速降低约6%,再(850～950℃)转而急剧升高15%～25%,最后(T>950℃)又快速下降。实验产物分析表明在高温高压下α石英-β石英相变和岩石部分熔融是岩石V_P异常变化的主要因素。由取样产物的矿物含量和弹性参数,计算了各温度条件下岩石的V_P,得出与实验测量相同的波速-温度变化趋势,即V_P随温度升高先缓慢降低,接着快速降低后又急剧升高,最后又快速减小。实验测量和理论计算对比研究表明,通过高温高压下岩石中的物相变化观测结果进行岩石波速的计算,是检验岩石弹性波速测量结果和研究地球内部地震波结构的一种有效方法。
Compressional wave velocity (V_p) for hornblende plagiogneiss was measured at 1.0GPa and up to 1100℃.The volume percentages of minerals were investigated in the run products,which were gained under 1.0GPa and at different temperature.The results show that at 1.0GPa,V_p of hornblende plagiogneiss decreases slowly (6%) up to 700℃,and decreases quickly (6%) from 700 to 850℃,and then increases sharply (15%～25%) from 850 to 950℃,and decreases quickly again from 950 to 1100℃. According to the investigations on products,we hold that the α-β transition of quartz and partial melting of specimen are responsible for the variation of V_p,With the volume percentages of minerals and their elastic parameters,the temperature variation of velocities for specimen are calculated by using Voigt-Reuss-Hill (VRH) model.The calculation shows a same temperature trend of V_p with experiment run,which shows the V_p,with increasing temperature,decreases slowly at first,and then decreases quickly followed by a sharp increase,and then decreases quickly again.From this work,it is believed that according to the investigation on phase transformation in rock,we can calculate the velocities of rock at different pressure and temperature,which is an effective method for testing experimental results and for studying earth's seismic structure.
Compressional wave velocity (V_p) for hornblende plagiogneiss was measured at 1.0GPa and up to 1100℃.The volume percentages of minerals were investigated in the run products,which were gained under 1.0GPa and at different temperature.The results show that at 1.0GPa,V_p of hornblende plagiogneiss decreases slowly (6%) up to 700℃,and decreases quickly (6%) from 700 to 850℃,and then increases sharply (15%～25%) from 850 to 950℃,and decreases quickly again from 950 to 1100℃. According to the investigations on products,we hold that the α-β transition of quartz and partial melting of specimen are responsible for the variation of V_p,With the volume percentages of minerals and their elastic parameters,the temperature variation of velocities for specimen are calculated by using Voigt-Reuss-Hill (VRH) model.The calculation shows a same temperature trend of V_p with experiment run,which shows the V_p,with increasing temperature,decreases slowly at first,and then decreases quickly followed by a sharp increase,and then decreases quickly again.From this work,it is believed that according to the investigation on phase transformation in rock,we can calculate the velocities of rock at different pressure and temperature,which is an effective method for testing experimental results and for studying earth's seismic structure.
引文
Aizawa Y,Ito K and Tatsumi Y.2002． Compressional wave velocity of granite and amphibolite up to melting temperatures at 1GPa.Tectonophysics,351:255-261
Bass JD.1995． Elasticity of minerals,glasses,and melts.In:Ahrens TJ (Ed).Mineral Physics and Crystalligraphy:A Handbook of Physical Constants.AGU Reference Shelf 2． American Geophysics Union,Washington.D.C.,45-63
Bina CR and Helffrich GR.1992． Calculation of elastic properties from thermodynamic equation of state principles.Annu.Rev.Earth.Planet.Sci.,20:527-552
Christensen NI and Mooney WD.1995． Seismic velocity structure and composition of the continental crust:A global view.J.Geophys.Res.,100(B7) :9761-9788
Cook RK.1957． Variation of elastic constants and static strains with hydrostatic pressure:A method for calculating from ultrasonic measurements.J.Acoust.Soc.Am.,29:445-449
Gao S,Kern H,Liu YS,Jin SY,Popp T,Jin ZM,Feng JL,Sun M and Zhao ZB.2000． Measured and calculated seismic velocities and densities for granulites from xenolith occurrences and adjacent exposed lower crustal sections:A comparative study from the North China craton.J.Geophys.Res.,105(B8) :18965-18976
Jackson I,Rudnick R and O'Reilly S.1990． Measured and calculated elastic wave velocities for xenoliths from lower crust and upper mantle.Tectonophysics,173:207-210
Ji SC and Wang ZC.1999． Elastic properties of forsterite-enstatite composites up to 3． OGPa.Geodynamics,28:147-174
Ji SC,Wang Q and Xia B.2003． P-wave velocities of polymineralic rocks:Comparison of theory and experiment and test of elastic mixture rules.Tectonophysics,366:165-185
Kern H.1982． Elastic-wave velocity in crustal and mantle rocks at high pressure and temperature:The role of the high-low quartz transition and of dehydration reactions.Phys.Earth.Planet.Inter.,29:12-23
LiuYG,XieHS,Guo J,Zou WG Xu JA and ZhaoZD.2000． A new method for experimental determination of compressional velocities in rocks and minerals at high-pressure.Chin.Phys.Lett.,17 (12) :924-926
Wu ZX,Deng JF,Wyllie PJ and Newman S.1995． Dehydration-melting experiment of the biotite-gneiss,eastern Hebei,at 1GPa pressure.Scientia Geologica Sinica,30(1) :12-18 (in Chinese with English abstract)
Wyllie MRJ,Gregory AR and Gardner LW.1956． Elastic wave velocities in heterogeneous and porous media.Geophysics,21 (1) :41-70
Xie HS,Zhang YM and Xu HG.1993． A new of method of elastic-wave velocities in minerals and rocks at high-temperature and highpressure and its significance.Sci.China (Series B),36 (10) :1276-1280
Yue LX,Xie HS,Liu CQ and Wu FC.2002． Compressional velocity and attenuation in amphibolite at 2． 0GPa and up to 1200℃.Chinese Journal of High Pressure Physics,16 (3) :176-182 (in Chinese with English abstract)
Zhou WG,Xie HS,Liu YG,Zheng XG Zhao ZD and Zhou H.2005． Dehydration melting of solid amphibolite at 2． 0GPa:Effects of time and temperature.Sci.China (Series D),48(8) :1120-1133
Zhou WG,Xie HS,Zhao ZD and Bai WM.1999 a.Compressional wave velocity and phase transformation for andesite at 2． 0GPa and at room temperature to 1160℃.Earth Science-Journal of China University of Geosciences,24 (3) :261-264 (in Chinese with English abstract)
Zhou WG,Xie HS,Zhao ZD,Zhu WG,Guo J and Xu JA.1999b.Compressional wave velocity and phase transformation for a trachybasalt at 2． 0GPa and up to 1623K..Progress in Natural Science,9(4) :279-285
Zhou WG,Xie HS,Zhao ZD,Zhuo H and Guo J.2002． The elastic parameters of α-β quartz phase transformation at 0． 7～1． 8GPa and at room temperature to 1120℃.Progress in Natural Science,12 (8) :866-869 (in Chinese)
吴宗絮,邓晋福,Wyllie PJ,Newman S.1995． 冀东黑云母片麻岩在1GPa压力下脱水熔融实验.地质科学,30(1) :12-18
岳兰秀,谢鸿森,刘丛强,吴丰昌.2002． 2． 0GPa、室温至1200℃条件下斜长角闪岩的纵波速度及其衰减.高压物理学报.16:176-182
周文戈,谢鸿森,赵志丹,白武明.1999 a.2． 0GPa、室温至1160℃条件下安山岩纵波速度与相变.地球科学--中国地质大学学报.24(3) :261-264
周文戈,谢鸿森,赵志丹,周辉,郭捷.2002． 0． 7～1． 8GPa,室温～1120℃条件下α-β石英相变的弹性参数.自然科学进展.12(8) :866-869
Bass JD.1995． Elasticity of minerals,glasses,and melts.In:Ahrens TJ (Ed).Mineral Physics and Crystalligraphy:A Handbook of Physical Constants.AGU Reference Shelf 2． American Geophysics Union,Washington.D.C.,45-63
Bina CR and Helffrich GR.1992． Calculation of elastic properties from thermodynamic equation of state principles.Annu.Rev.Earth.Planet.Sci.,20:527-552
Christensen NI and Mooney WD.1995． Seismic velocity structure and composition of the continental crust:A global view.J.Geophys.Res.,100(B7) :9761-9788
Cook RK.1957． Variation of elastic constants and static strains with hydrostatic pressure:A method for calculating from ultrasonic measurements.J.Acoust.Soc.Am.,29:445-449
Gao S,Kern H,Liu YS,Jin SY,Popp T,Jin ZM,Feng JL,Sun M and Zhao ZB.2000． Measured and calculated seismic velocities and densities for granulites from xenolith occurrences and adjacent exposed lower crustal sections:A comparative study from the North China craton.J.Geophys.Res.,105(B8) :18965-18976
Jackson I,Rudnick R and O'Reilly S.1990． Measured and calculated elastic wave velocities for xenoliths from lower crust and upper mantle.Tectonophysics,173:207-210
Ji SC and Wang ZC.1999． Elastic properties of forsterite-enstatite composites up to 3． OGPa.Geodynamics,28:147-174
Ji SC,Wang Q and Xia B.2003． P-wave velocities of polymineralic rocks:Comparison of theory and experiment and test of elastic mixture rules.Tectonophysics,366:165-185
Kern H.1982． Elastic-wave velocity in crustal and mantle rocks at high pressure and temperature:The role of the high-low quartz transition and of dehydration reactions.Phys.Earth.Planet.Inter.,29:12-23
LiuYG,XieHS,Guo J,Zou WG Xu JA and ZhaoZD.2000． A new method for experimental determination of compressional velocities in rocks and minerals at high-pressure.Chin.Phys.Lett.,17 (12) :924-926
Wu ZX,Deng JF,Wyllie PJ and Newman S.1995． Dehydration-melting experiment of the biotite-gneiss,eastern Hebei,at 1GPa pressure.Scientia Geologica Sinica,30(1) :12-18 (in Chinese with English abstract)
Wyllie MRJ,Gregory AR and Gardner LW.1956． Elastic wave velocities in heterogeneous and porous media.Geophysics,21 (1) :41-70
Xie HS,Zhang YM and Xu HG.1993． A new of method of elastic-wave velocities in minerals and rocks at high-temperature and highpressure and its significance.Sci.China (Series B),36 (10) :1276-1280
Yue LX,Xie HS,Liu CQ and Wu FC.2002． Compressional velocity and attenuation in amphibolite at 2． 0GPa and up to 1200℃.Chinese Journal of High Pressure Physics,16 (3) :176-182 (in Chinese with English abstract)
Zhou WG,Xie HS,Liu YG,Zheng XG Zhao ZD and Zhou H.2005． Dehydration melting of solid amphibolite at 2． 0GPa:Effects of time and temperature.Sci.China (Series D),48(8) :1120-1133
Zhou WG,Xie HS,Zhao ZD and Bai WM.1999 a.Compressional wave velocity and phase transformation for andesite at 2． 0GPa and at room temperature to 1160℃.Earth Science-Journal of China University of Geosciences,24 (3) :261-264 (in Chinese with English abstract)
Zhou WG,Xie HS,Zhao ZD,Zhu WG,Guo J and Xu JA.1999b.Compressional wave velocity and phase transformation for a trachybasalt at 2． 0GPa and up to 1623K..Progress in Natural Science,9(4) :279-285
Zhou WG,Xie HS,Zhao ZD,Zhuo H and Guo J.2002． The elastic parameters of α-β quartz phase transformation at 0． 7～1． 8GPa and at room temperature to 1120℃.Progress in Natural Science,12 (8) :866-869 (in Chinese)
吴宗絮,邓晋福,Wyllie PJ,Newman S.1995． 冀东黑云母片麻岩在1GPa压力下脱水熔融实验.地质科学,30(1) :12-18
岳兰秀,谢鸿森,刘丛强,吴丰昌.2002． 2． 0GPa、室温至1200℃条件下斜长角闪岩的纵波速度及其衰减.高压物理学报.16:176-182
周文戈,谢鸿森,赵志丹,白武明.1999 a.2． 0GPa、室温至1160℃条件下安山岩纵波速度与相变.地球科学--中国地质大学学报.24(3) :261-264
周文戈,谢鸿森,赵志丹,周辉,郭捷.2002． 0． 7～1． 8GPa,室温～1120℃条件下α-β石英相变的弹性参数.自然科学进展.12(8) :866-869
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