褶皱—冲断体系双层滑脱构造变形物理模拟实验

刘玉萍; 尹宏伟; 张洁; 徐士进; 解国爱

doi:10.11781/sysydz200804424

褶皱—冲断体系双层滑脱构造变形物理模拟实验

doi: 10.11781/sysydz200804424

南京大学, 地球科学系, 南京, 210093

基金项目: 国家自然科学基金项目(40402019)

详细信息

作者简介:
刘玉萍(1983- ),女,硕士研究生,主要从事构造地质与应用地球物理研究.E-mail:aurora1983@126.com.

中图分类号: P542.2
计量
- 文章访问数: 747
- HTML全文浏览量: 44
- PDF下载量: 389
- 被引次数: 0
出版历程
- 收稿日期: 2007-08-02
- 修回日期: 2008-05-30
- 刊出日期: 2008-07-28

PHYSICAL MODELING ON DOUBLE DECOLLEMENTS STRUCTURE IN FOLD-AND-THRUST BELT

Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu 210093, China

摘要

摘要: 褶皱冲断带是造山带—前陆盆地系统的重要组成部分,滑脱层在其形成和发展过程中起了显著作用。应用物理模拟实验方法,在模型中设置2套滑脱层,并改变其厚度和位置,研究了褶皱冲断带的几何学和运动学特征。实验结果表明,在双滑脱层褶皱冲断带中,主要形成自底部滑脱层向上传播的正向逆冲断层,断层以前展式发展,岩层在上部滑脱层以上弯曲形成断层相关褶皱。当2个滑脱层距离相近时,作为一个整体对断层起控制作用,形成的正向逆冲断层数目少,有利于反向逆冲断层形成;与2个滑脱层距离较远时,下部滑脱层对逆冲断层起主要控制作用,形成较多的正向逆冲断层和较少的反向逆冲断层。
- 物理模拟 /
- 滑脱层 /
- 断层相关褶皱 /
- 褶皱冲断带
Abstract: Fold-and-thrust belt is an important component in orogen-foreland basin system.Decollement plays a remarkable role in its formation and development.In order to study geometric and kinematic characteristics of fold-and-thrust belt which has 2 decollements with different thickness and position,a series of scaled physical modeling experiments have been done.Deformations of models with shortening increase are photoed.In fold-and-thrust belt with 2 decollements,forward thrusts which propagate from the lower decollement form the main thrusts,and their development obeys forward pattern.In the hanging wall of thrust,rock layers bend above the upper decollement and form fault-related fold.When the 2 decollements are close to each other,they work together and control thrust development,forming less forward thrusts,yet favorable for backward thrusts.While they are widely spaced,the lower decollement mainly controls thrusts development.More forward thrusts and less backward thrusts are formed.
- physical modeling /
- decollement /
- fault-related fold /
- fold-and-thrust belt

HTML全文

参考文献(31)

[1]	蔡立国,刘和甫.四川前陆褶皱-冲断带构造样式与特征[J].石油实验地质,1997,19(2):115～120
[2]	陈楚铭,卢华复,贾东等.塔里木盆地北缘库车再生前陆褶皱逆冲带中丘里塔格前锋带的构造与油气[J].地质论评,1999,45(4):423～433
[3]	何鲤,刘莉萍,罗潇等.川西龙门山推覆构造特征及有利油气勘探区块预测[J].石油实验地质,2007,29(3):247～252
[4]	赵贤正,夏义平,潘良云等.酒泉盆地南缘山前冲断带构造特征与油气勘探方向[J].石油地球物理勘探,2004,39(2):222～227
[5]	杜菊民,张庆龙,李洪喜等.内蒙古中部大青山地区推覆构造系统及与断层相关的褶皱[J].地质通报,2005,24(7):660～664
[6]	裴振洪.南大巴山构造带中新生代构造变形特征研究[J].石油实验地质,2007,29(3):269～2741
[7]	李亚林,王成善,伊海生等.西藏北部新生代大型逆冲推覆构造与唐古拉山的隆起[J].地质学报,2006,80(8):1118～1130
[8]	汪新伟,汪新文,刘剑平等.准噶尔盆地南缘褶皱-逆冲断层带分析[J].地学前缘,2005,12(4):411～42
[9]	Krantz R W.Measurements of friction coefficients and cohesion for faulting and fault reactivation in laboratory models using sand and sand mixtures[J].Tectonophysics,1991,188:203～207
[10]	Davy P,Cobbold P R.Experiments on shortening of a 4-layer model of the continental lithosphere[J].Tectonophysics,1991,188:1～25
[11]	Rossetti F,Ranali G,Faccenna C.Pheological properties of paraffin as an analogue material for viscous crustal deformation[J].Journal of Structural Geology,1999,21:413～417
[12]	Rahe B,Ferrill D A,Morris A P.Physical analog modeling of pull-apart basin evolution[J].Tectonophysics,1998,285:21～40
[13]	单家增,李继亮,肖文交.陆-陆碰撞造山带动力学成因机制的物理模拟实验[J].地学前缘,1999,6(4):397～406
[14]	Bonini M,Sokoutis D,Talbot C J,et al.Indenter growth in analogue models of Alphine-type deformation[J].Tectonics,1999,18(1):119～128
[15]	Rossetti F,Faccenna C,Ranalli G,et al.Convergence rate-dependent growth of experimental viscous orogenic wedges[J].Earth and Planetary Science Letters,2000,178:367～372
[16]	Persson K S,Sokoutis D.Analogue models of orogenic we-dges controlled by erosion[J].Tectonophysics,2002,356:323～336
[17]	Sun Z,Zhou D,Zhong Z,et al.Experimental evidence for the dynamics of the formation of the Yinggehai basin,NW South China Sea[J].Tectonophysics,2003,372:41～58
[18]	周建勋,周建生.渤海湾盆地新生代构造变形机制:物理模拟和讨论[J].中国科学(D辑),2006,36(6):507～519
[19]	Keep M.Models of lithospheric-scale deformation during plate collision:Effects of indentor shape and lithospheric thickness[J].Tectonophysics,2000,326:203～216
[20]	Bellahsen N,Faccenna C,Funiciello F,et al.Why did Arabia seperate from Africa?Insights from 3-D laboratory experiments[J].Earth and Planetary Science Letters,2003,216:365～381
[21]	Moore V M,Vendeville B C,Wiltschko D V.Effects of buo-yancy and mechanical layering on collisional deformation of continental lithosphere:Results from physical modeling[J].Tectonophysics,2005,403:193～222
[22]	Colletta B,Letouzey J,Pinedo R,et al.Computerized X-ray tomography analysis of sandbox models:Examples of thin-skined thrust systems[J].Geology,1991,19:1063～1067
[23]	Koyi H.Mode of internal deformation in sand wedges[J].Journal of Structural Geology,1995,17(2):293～300
[24]	Vendeville C.Experimental insights on the geometry and kinematics of fold-and-thrust belts above weak,viscous evaporitic décollement[J].Journal of Structural Geology,2002,24:1729～1739
[25]	Couzens-Schultza B A,Vendeville B C,Wiltschko D V.Duplex style and triangle zone formation:Insights from physical modeling[J].Journal of Structural Geology,2003,25:1623～1644
[26]	Massoli D,Koyi H A,Barchi M R.Structural evolution of a fold and thrust belt generated by multiple décollements:Analogue models and natural examples from the Northern Ape-nnines (Italy)[J].Journal of Structural Geology,2006,28:185～199
[27]	Schellart W P.Shear test results for cohesion and friction coefficients for different granular materials:Scaling implications for their usage in analogue modeling[J].Tectonophysics,2000,324:1～16
[28]	Panien M,Schreurs G,Pfiffner A O.Mechanical behaviour of granular materials used in analogue modelling:Insights from grain characterization,ring-shear tests and analogue experiments[J].Journal of Structural Geology,2006,28:1710～1724
[29]	Koyi H A,Vendeville B C.The effect of décollement dip on geometry and kinematics of model accretionary wedges[J].Journal of Structural Geology,2003,25:1445～1450
[30]	Hubbert M K.Theory of scale models as applied to the study of geological structures[J].Geological Society of America Bulletin,1937,48:1459～1520
[31]	李亚林,伊海生,王成善等.西藏羌塘盆地盐相关构造特征与油气聚集[J].成都理工大学学报,2004,31(6):586～591