一种雁行石英脉体的形成及构造意义

doi:10.3969/j.issn.0253-4967.2012.04.012

摘要/Abstract

摘要：

对发育于牛首山奥陶系砂岩中的一组雁行石英脉体进行了分析。牛首山石英脉体的形成既与Ⅰ型主断裂末端分解的次级雁行脉有相似点,也具有自身的一些特点。它们形成于不同的机制,但区别于张性脉体,单个脉体也属于Ⅱ型破裂。脉体之间的岩桥区变形并不是简单的横弯作用,而且还有一定的韧性变形,发生一定程度的构造减薄,纵弯也起到一定作用。早期岩石中的不均一构造(断裂、节理以及层理面等)对后期雁行脉的生长起到了控制作用。单个脉体均是在左行走滑控制下形成。这组石英脉体是走滑断层(Ⅱ型)端点的断层破碎带内由R'次级走滑断裂控制形成的,而不是由Ⅰ型主断裂末端分解的次级雁行脉。走滑断层端点前的楔型断层破碎带是由主断层控制下形成的次级R和P剪切面所围限的区域,在楔型体内则发育同向或反向剪切作用控制下的破裂或脉体。这种断层端部的变形是一种非常普遍的断层扩展方式。

关键词: 石英脉, 雁型, 走滑断层, 牛首山, 断层端破碎带

Abstract:

A set of en-echelon quartz veins in the Ordovician sandstone in the Noushoushan was analyzed. The quart veins in the Niushoushan show both characteristics of those formed at the tip of mode-I parent faults and the ones in the tip zone of mode-II faults,which means that they took place by different mechanism from those extensional veins. The bridges between the veins were deformed not only by bending but also by some extent of ductile deformation. And to those early fabrics such as faults,joints and bedding surfaces in the bridges,the buckling may take place. The early fabric in the rocks was one of the important factors which control the late development of the en-echelon veins. These results show that the development of these veins may be controlled by the R' shear zones at the fault-tip damage zone of a strike-slip fault(Mode-Ⅱ),instead of minor en-echelon ones formed at the tip of a mode-I parent fault. The wedge-type fault damage zone at the tip of a major strike-slip fault was bounded by R and P minor shear zones derived from the major fault,and in the wedge region antithetic and synthetic shear veins or fractures will take place. This type of deformation is pervasive at the termination of the strike-slip fault,and it is an important way for the propagation of faults.

Key words: quartz vein, en-echelon, strike-slip fault, Niushoushan Range, fault-tip damage zone

中图分类号:

P542

张进, 李岩峰, 肖文霞. 一种雁行石英脉体的形成及构造意义[J]. 地震地质, 2012, (4): 684-695.

ZHANG Jin, LI Yan-feng, XIAO Wen-xia. FORMATION OF ONE TYPE OF AN EN-ECHELON QUARTZ VEIN ARRAY AND ITS IMPLICATION[J]. SEISMOLOGY AND GEOLOGY, 2012, (4): 684-695.

参考文献

何绍勋,奚小双.1988.对江西西华山钨矿脉雁行构造成因的初步探讨［J］.地质学报,62(1): 31-42.
HE Shao-xun,XI Xiao-shuang.1988.The genesis of the en-echelon structure of Tungsten veins in Xihuangshan,Jiangxi ［J］.Acta Geologica Sinica,62(1): 31-42(in Chinese).
吉让寿.1985.湖南锡矿山初始雁行张裂隙脉的研究［J］.地质论评,31(1): 23-30.
JI Rang-shou.1985.Primary en-echelon tension fissure veins in the Sikuangshan ore district,Hunan Province ［J］.Geological Review,31(1): 23-30(in Chinese).
国家地震局地质研究所,宁夏回族自治区地震局.1990.海原活动断裂带［M］.北京: 地震出版社.
Institute of Geology,State Seismological Bureau,Seismological Bureau of Ningxia Autonomous Region.1990.Haiyuan Active Fault Zone ［M］.Seismological Press,Beijing(in Chinese).
马宗晋,邓起东.1965.节理的力学性质、分期、配套问题［A］.见: 构造地质问题.北京: 科学出版社.15-29.
MA Zong-jin,DENG Qi-dong.1965.The mechanical properties,staging and grouping of joints ［A］.In: Problems in the Structural Geology. Sciences Press,Beijing. 15-29(in Chinese).
宁夏回族自治区地质矿产局.1996.宁夏回族自治区岩石地层(全国地层多重划分对比研究64)［M］.北京: 中国地质大学出版社.
Bureau of Geological and Mineral Resources of Ningxia Hui Autonomous Region.1996.Stratigraphy(lithostratic)of Ningxia Hui Autonomous Region,(Mutiple classification and correlation of the stratigraphy of China 64)［M］.China University of Geosciences Press,Wuhan(in Chinese).
宋鸿林.1983.共轭雁行脉列分析［J］.地震地质,5(2): 1-10.
SONG Hong-lin.1983.Analyses of conjugate en-echelon vein arrays ［J］.Seismology and Geology,5(2): 1-10(in Chinese).
杨俊杰,张伯荣.1990.鄂尔多斯盆地西缘掩冲构造带的基本特征［A］.见: 杨俊杰编.鄂尔多斯盆地西缘逆冲带构造与油气.兰州: 甘肃科学技术出版社.91-105.
YANG Jun-jie,ZHANG Bo-rong.1990.The basic characteristics of the western Ordos thrust belt ［A］.In: YANG Jun-jie(ed).The Structures,Oil and Gas of Western Ordos Basin. Gansu Science and Technology Press,Lanzhou. 91-105(in Chinese).
张进,马宗晋,任文军,等.2003.宁夏中部牛首山地区构造特征及其地质意义［J］.大地构造与成矿,27(2): 132-142.
ZHANG Jin,MA Zong-jin,REN Wen-jun,et al.2003.Structural characteristics in the Niushoushan area,central Ningxia and its geological significance ［J］.Geotectonica et Metallogenia,27(2): 132-142(in Chinese).
张进,马宗晋,任文军,等.2007.滑塌堆积在逆冲构造中的作用: 以宁夏牛首山中奥陶统米钵山组为例［J］.地学前缘,14(4): 85-95.
ZHANG Jin,MA Zong-jin,REN Wen-jun,et al.2007.The role of olistostrome in thrusting-A case study from the Miboshan formation of middle Ordovician in the Niushou Mountain,Ningxia ［J］.Earth Science Frontiers,14(4): 85-95(in Chinese).
Cunningham W D,Mann P.2007.Tectonics of strike-slip restraining and releasing bends ［J］.Geological Society Special Publications,London 290.1-12.
Deng Qidong,Wu Daning,Zhang Peizhen,et al.1986.Structure and deformational character of strike-slip fault zones ［J］.Pure and Applied Geophysics,124: 203-223.doi: 10.1007/BF00875726.
Fossen H.2010.Structural Geology ［M］.Cambridge University Press,Cambridge.
Hancock P L.1972.The analysis of en echelon veins ［J］.Geological Magazine,109: 269-276.
Hancock P L.1985.Brittle microtectonics: Principles and practices ［J］.Journal of Structural Geology,7: 437-457.
Kilb D,Rubin A M.2002.Implications of diverse fault orientations imaged in relocated aftershocks of the Mount Lewis,M_L 5.7,California,earthquake ［J］.Journal of Geophysical Research,107(B11): 2294,1-5.doi: 10.1029/2001JB000149.
Kim Y S,Peacock D C P,Sanderson D J.2003.Mesoscale strike-slip faults and damage zones at Marsalforn,Gozo Island Malta ［J］.Journal of Structural Geology,25: 793-812.
Laing W P.2004.Tension vein arrays in progressive strain: Complex but predictable architecture,and major hosts of ore deposits ［J］.Journal of Structural Geology,26: 1303-1315.
Liu S F.1998.The coupling mechanism of basin and orogen in the western Ordos Basin and adjacent regions of China ［J］.Journal of Asian Earth Science,16: 369-383.
Mazzoli S,Bucci D D.2003.Critical displacement for normal fault nucleation from en-echelon vein arrays in limestones: A case study from the southern Apennines(Italy)［J］.Journal of Structural Geology,25: 1011-1020.
McGrath A G,Davison Ⅰ.1995.Damage zone geometry around fault tips ［J］.Journal of Structural Geology,17: 1011-1024.
Nicholson R,Ejiofor I B.1987.The three-dimensional morphology of arrays of echelon and sigmoidal,mineral-filled fractures: Data from north Cornwall ［J］.Journal of Geological Society(London),144: 79-83.
Nicholson R,Pollard D D.1985.Dilation and linkage of echelon cracks ［J］.Journal of Structural Geology,7: 583-590.
Nicholson R.1991.Vein morphology,host rock deformation and the origins of the fabrics of echelon mineral veins ［J］.Journal of Structural Geology,13: 635-641.
Nicholson R.2000.Inter-array and intra-array kinematics of en echelon sigmoidal veins in cross-bedded sandstone,Merimbula,southeastern Australia: Discussion ［J］.Journal of Structural Geology,22: 145.
Olson J E,Pollard D D.1991.The initiation and growth of en echelon veins ［J］.Journal of structural Geology,13: 595-608.
Petit J P.1988.Can natural faults propagate under Mode II conditions？［J］Tectonics,7: 1243-1256.
Pollard D D,Segall P,Delany P T.1982.Formation and interpretation of dilatant echelon cracks ［J］.Geological Society of America Bulletin,93: 1291-1303.
Ramsay J G, Huber M I. 1983. The techniques of modern structural geology ［M］. Academic Press, London.
Ramsay J G,Huber M Ⅰ.1987.The Techniques of Modern Structural Geology,Vol.2 ［M］.Academic Press,London.
Reoring C.1968.The geometrical significance of natural en-echelon crack arrays ［J］.Tectonophysics,5: 107-123.
Richard M J,Rixon L K.1983.Stress configurations in conjugate quart vein arrays ［J］.Journal of Structural Geology,5: 573-578.
Riedel W.1929.Zur Mechanik geologischer brucherscheinungen ［J］.Zentralblatt fur Mineralogie,Geologie und Palaontologie.1929B: 354-368.
Rothery E.1988.En-echelon array development in extension and shear ［J］.Journal of Structural Geology,10: 63-71.
Smith J V.1995.True and apparent geometric variability of en-echelon vein arrays ［J］.Journal of Structural Geology,17: 1621-1626.
Smith J V.1996a. En echelon sigmoidal vein arrays hosted by faults ［J］.Journal of Structural Geology,11: 1173-1179.
Smith J V.1996b. Geometry and kinematics of convergent conjugate vein array systems ［J］.Journal of Structural Geology,18: 1291-1300.
Smith J V.1997.Initiation of convergent extension fracture vein arrays by displacement of discontinuous fault segments ［J］.Journal of Structural Geology,19: 1369-1373.
Smith J V.1999.Inter-array and intra-array kinematics of en echelon sigmoidal veins in cross-bedded sandstone,Merimbula,southeastern Australia ［J］.Journal of Structural Geology,21: 387-397.
Smith J V.2000.Inter-array and intra-array kinematics of en echelon sigmoidal veins in cross-bedded sandstone,Merimbula,southeastern Australia: Reply ［J］.Journal of Structural Geology,22: 147-148.
Srivastava D C.2000.Geometrical classication of conjugate vein arrays ［J］.Journal of Structural Geology,22: 713-722.
Sylvester A.1988.Strike-slip faults ［J］.Geological Society of America Bulletin,100: 1666-1703.doi: 10.1130/0016-7606(1988)100<1666: SSF>2.3.CO; 2.
Woodcock N H,Schubert C.1994.Continent strike-slip tectonics ［A］.In: Hancock P L(ed).Continental Deformation. Pergamon Press.251-263.

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