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Active normal faulting and crustal extension

J. A. Jackson
Geological Society, London, Special Publications, 28, 3-17, 1 January 1987, https://doi.org/10.1144/GSL.SP.1987.028.01.02
J. A. Jackson
Department of Earth Sciences, Bullard Laboratories, Madingley Rise Madingley Road, Cambridge CB3 0EZ, UK
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Summary

A world-wide review of fault-plane solutions and focal depths for large normal-faulting earthquakes on the continents shows that the overwhelming majority of such earthquakes nucleate in the depth range 6–15 km on faults dipping between 30 and 60°. In the few cases where levelling or seismic data are good enough, these normal faults are shown to be approximately planar from the surface to their nucleation depth at the base of the brittle crust. There is evidence that, in some cases, as a result of the enormous transitory increase in strain rate during large earthquakes, rupture continues into the normally ‘ductile’ lower crust on surfaces with substantially gentler dips. These low-angle surfaces may be analogous to some of the ‘detachments’ seen in metamorphic core complexes of the western USA, but the nature of the motion on them depends on strain rate as well as on rheological contrasts between the ‘detachments’ and the blocks on either side. Such contrasts, however, are unlikely to introduce substantial curvature to an originally planar shear zone.

If the observed spread in active normal-fault dips is caused by rotation of the faults and the blocks they bound during extension, then a maximum β value of 1.7 can be accommodated by seismic activity on a single generation of normal faults. With continued extension, either a new generation of steeper faults, cutting the rotated first faults, is likely to form, or the deformation will continue aseismically on faults dipping at less than 30°.

Large earthquakes have not been observed to nucleate on very low-angle (<20°) normal faults within the continental crust anywhere in the world. Such faults can of course move aseismically, but are unlikely to do so on a large scale within the upper crust in areas where steep normal faults are seismically active. Thus extensional models that require concentrated simple shear on large sub-horizontal faults within the brittle upper crust will also require a spatial separation between aseismic, very low-angle faulting and seismic high-angle faulting. Since seismogenic high-angle faults dominate the topography of extending regions, upper-crustal very-low-angle faulting, if it occurs on a large scale, presumably does so in areas that are relatively flat.

  • © 1987 The Geological Society

References

    1. Aki K.,
    2. Richards P.
    (1980) Quantitative Seismology (W. H. Freeman & Co. San Francisco). 932.
    1. Ambraseys N.N.,
    2. Melville C.P.
    (1982) A History of Persian Earthquakes (Cambridge University Press). 219.
    1. Anderson E.M.
    (1951) The Dynamics of Faulting (Oliver & Boyd, Edinburgh), 2nd edn. 206.
    1. Angelier J.,
    2. Colletta B.
    (1983) Tensional fractures and extensional tectonics. Nature 301:49–51.
    OpenUrlCrossRef
    1. Armstrong R.L.
    (1982) Cordilleran Metamorphic Core Complexes. Ann. Rev. Earth planet. Sci. 10:129–154.
    OpenUrlCrossRefWeb of Science
    1. Barton P.,
    2. Wood R.
    (1984) Tectonic evolution of the North Sea Basin: crustal stretching and subsidence. Geophys. J. R. astron. Soc. 79:987–1022.
    OpenUrl
    1. Brewer J.A.,
    2. Smythe D.K.
    (1984) MOIST and the continuity of reflector geometry along the Caledonian-Appalachian orogen. J. geol. Soc. London 141:105–120.
    OpenUrlAbstract/FREE Full Text
    1. de Charpal O.,
    2. Guennoc P.,
    3. Montadert L.,
    4. Roberts D.G.
    (1978) Rifting, crustal attenuation and subsidence in the Bay of Biscay. Nature 275:706–711.
    OpenUrlCrossRefWeb of Science
    1. Chen W-P.,
    2. Molnar P.
    (1983a) Focal depths and fault plane solutions of earthquakes under the Tibetan plateau. J. geophys. Res. 88:1180–1196.
    OpenUrlCrossRef
    1. Chen W-P.,
    2. Molnar P.
    (1983b) The depth distribution of intracontinental and intraplate earthquakes and its implications for the thermal and mechanical properties of the lithosphere. J. geophys. Res. 88:4183–4214.
    OpenUrlCrossRefWeb of Science
    1. Crittenden M.D. Jr.,
    2. Coney P.J.,
    3. Davis G.H.
    , eds (1980) Cordilleran Metamorphic Core Complexes, Mem. Geol. Soc. Am. 153. 490.
    1. Davis G.H.
    (1983) Shear zone model for the origin of Metamorphic Core Complexes. Geology 11:342–347.
    OpenUrlAbstract/FREE Full Text
    1. Davis G.H.
    A shear-zone model for the structural evolution of metamorphic core complexes in southeastern Arizona, 247–266, This volume.
    1. Doser D.I.
    (1985) Source parameters and faulting processes of the 1959 Hebgen Lake, Montana, earthquake sequence. J. geophys. Res. 90:4537–4555.
    OpenUrlCrossRef
    1. Doser D.I.,
    2. Smith R.B.
    (1985) Source parameters of the 28 October 1983 Borah Peak, Idaho, earthquake from body wave analysis. Bull. seism. Soc. Am. 75:1041–1051.
    OpenUrlAbstract/FREE Full Text
    1. Eddington P.K.,
    2. Smith R.B.
    Kinematics of Basin and Range intraplate extension, 371–392, This volume.
    1. Etheridge M.A.
    On the reactivation of extensional fault systems. Phil. Trans. R. Soc. London, In press.
    1. Eyidogan H.,
    2. Jackson J.A.
    (1985) A seismological study of normal faulting in the Demirci, Alasehir and Gediz earthquakes of 1969–70 in western Turkey: implications for the nature and geometry of deformation in the continental crust. Geophys. J. R. astron. Soc. 81:569–607.
    OpenUrl
    1. Fletcher R.C.,
    2. Hallett B.
    (1983) Unstable extension of the lithosphere: a mechanical model for Basin-and-Range structure. J. geophys. Res. 88:7457–7466.
    OpenUrl
    1. Frost E.G.,
    2. Martin D.L.
    , eds (1982) Mesozoic-Cenozoic evolution of the Colorado River region, California, Arizona and Utah (Cordilleran Publishers, San Diego, California).
    1. Gans P.B.,
    2. Miller E.L.
    (1983) Geol. Soc. Am. Rocky Mt. & Cordilleran Sections meeting: Utah Geol. & Mining Surv. Spec. Studies Guidebook, Style of mid-Tertiary extension in east-central Nevada, 59, Part 1, pp 107–160.
    OpenUrl
    1. Gans P.B.,
    2. Miller E.L.,
    3. McCarthy J.,
    4. Ouldcott M.L.
    (1985) Tertiary extensional faulting and evolving ductile-brittle transition zones in the northern Snake Range and vicinity: new insights from seismic data. Geology 13:189–193.
    OpenUrlAbstract/FREE Full Text
    1. Gibbs A.D.
    (1984) Structural evolution of extensional basin margins. J. geol. Soc. London 141:609–620.
    OpenUrlAbstract/FREE Full Text
    1. Hobbs B.E.,
    2. Means W.D.,
    3. Williams P.F.
    (1976) An outline of structural geology (John Wiley & Sons). 571.
    1. Jackson J.A.,
    2. McKenzie D.P.
    (1983) The geometrical evolution of normal fault systems. J. struct. Geol. 5:471–482.
    OpenUrlCrossRef
    1. Jackson J.A.,
    2. Gagnepain J.,
    3. Houseman G.,
    4. King G.,
    5. Papadimitriou P.,
    6. Sourfleris C.,
    7. Virieux J.
    (1982) Seismicity, normal faulting and the geomorphological evolution of the Gulf of Corinth, (Greece): the Corinth earthquakes of February and March 1981. Earth planet. Sci. Lett. 57:377–397.
    OpenUrlCrossRef
    1. Jankhof K.
    (1945) Changes in ground level produced by the earthquakes of April 14 to 18 1928 in southern Bulgaria, Tremblements de Terre en Bulgarie, Nos 29–31 (Institute meteorologique central de Bulgarie, Sofia) in Bulgarian, pp 131–136.
    1. Kim W-Y,
    2. Kulhanek O.,
    3. Meyer K.
    (1984) Source processes of the 1981 Gulf of Corinth earthquake sequence from body wave analysis. Bull. seism. Soc. Am. 74:459–477.
    OpenUrlAbstract/FREE Full Text
    1. King G.,
    2. Ouyang Z.,
    3. Papadimitriou P.,
    4. Deschamps A.,
    5. Gagnepain J.,
    6. Houseman G.,
    7. Jackson J.,
    8. Soufleris C.,
    9. Virieux J.
    (1984) The evolution of the Gulf of Corinth (Greece): an aftershock study of the 1981 earthquake. Geophys. J.R. astron. Soc. 80:677–693.
    OpenUrl
    1. Lahr K.M.,
    2. Lahr J.C.,
    3. Lindh A.G.,
    4. Bufe C.G.,
    5. Lester F.W.
    (1976) The August 1975 Oroville earthquakes. Bull. seism. Soc. Am. 66:1085–1099.
    OpenUrlAbstract/FREE Full Text
    1. Langston C.A.,
    2. Helmberger D.V.
    (1975) A procedure for modelling shallow dislocation sources. Geophys. J.R. astron. Soc. 42:117–130.
    OpenUrl
    1. Le Pichon X.,
    2. Sibuet J.C.
    (1981) Passive margins: a model of formation. J. geophys. Res. 86:3708–3721.
    OpenUrlCrossRef
    1. McKenzie D.P.
    (1972) Active tectonics of the Mediterranean region. Geophys. J.R. astron. Soc. 30:109–185.
    OpenUrl
    1. McKenzie D.P.
    (1978a) Some remarks on the development of sedimentary basins. Earth planet. Sci. Lett. 40:25–32.
    OpenUrlCrossRef
    1. McKenzie D.P.
    (1978b) Active tectonics of the Alpine-Himalayan belt: the Aegean Sea and surrounding regions. Geophys. J. R. astron. Soc. 55:217–254.
    OpenUrlCrossRef
    1. Meissner R.,
    2. Strehlau J.
    (1982) Limits of stress in continental crusts and their relation to depth—frequency distribution of shallow earthquakes. Tectonics 1:73–89.
    OpenUrlCrossRefWeb of Science
    1. Mercier J-L.,
    2. Mouyaris N.,
    3. Simeakis C.,
    4. Roundoyannis T.,
    5. Angelidhis C.
    (1979) Intraplate deformation: a quantitative study of the faults activated by the 1978 Thessaloniki earthquakes. Nature 278:45–48.
    OpenUrlCrossRefWeb of Science
    1. Molnar P.,
    2. Chen W-P.
    (1982) in Mountain Building Processes, Seismicity and mountain Building, ed Hsu K. J. (Academic Press), pp 41–57.
    1. Morton W.H.,
    2. Black R.
    (1975) in Afar depression of Ethiopia, Inter-union comm, Crustal attenuation in Afar, Geodyn. Sci. Rep. eds Pilger A., Rosler A. (E. Schweizerbart’sche Verlagsbuchhandlung, Stuttgart), 14, pp 55–65.
    OpenUrl
    1. Nabelek J.
    (1985) Geometry and mechanism of faulting of the 1980 El Asnam, Algeria, earthquake from inversion of teleseismic body waves and comparison with field observations. J. geophys. Res. 90:12,713–12,728.
    OpenUrl
    1. North R.G.
    (1974) Seismic slip rates in the Mediterranean and Middle East. Nature 252:560–563.
    OpenUrlCrossRef
    1. Proffett J.M.
    (1977) Cenozoic geology of the Yerington district, Nevada, and implications for the nature of Basin and Range faulting. Bull. geol. Soc. Am. 88:247–266.
    OpenUrlAbstract/FREE Full Text
    1. Ransome F.L.,
    2. Emmons W.H.,
    3. Garrey G.H.
    (1910) Geology and ore deposits of the Bullfrog district, Nevada. Bull. U. S. geol. Surv. 407. 130.
    1. Rehrig W.A.,
    2. Reynolds S.J.
    (1980) in Cordilleran Metamorphic Core Complexes, Geologic reconnaissance of a northwest trending zone of metamorphic core complexes in southern and western Arizona, Mem. geol. Soc. Am. eds Crittenden M.D. Jr., Coney P.J., Davis G.H. 153, pp 131–157.
    OpenUrl
    1. Richter C.F.
    (1958) Elementary Seismology (W.H. Freeman, San Francisco).
    1. Shudofsky G.N.
    (1985) Source mechanisms and focal depths of east African earthquakes using Rayleigh wave inversion and body wave modelling. Geophys. J. R. astron. Soc. 83:563–614.
    OpenUrl
    1. Sibson R. H.
    (1980) Transient discontinuities in ductile shear zones. J. struct. Geol. 2:165–171.
    OpenUrlCrossRef
    1. Sibson R. H.
    (1982) Fault zone models, heat flow and depth distribution of earthquakes in the continental crust of the United States. Bull. seism. Soc. Am. 72:151–163.
    OpenUrlAbstract/FREE Full Text
    1. Sibson R. H.
    (1984) Roughness at the base of the seismogenic zone: contributing factors. J. geophys. Res. 89:5791–5800.
    OpenUrlCrossRefWeb of Science
    1. Sibson R. H.
    (1985) A note on fault reactivation. J. struct. Geol. 7:751–754.
    OpenUrlCrossRef
    1. Smith R.B.,
    2. Bruhn R.L.
    (1984) Intraplate extensional tectonics of the eastern Basin-Range: inferences on structural style from seismic reflection data, regional tectonics and thermal-mechanical models of brittle-ductile deformation. J. geophys. Res. 89:5733–5762.
    OpenUrlWeb of Science
    1. Soufleris C.,
    2. Stewart G.S.
    (1981) A source study of the Thessaloniki (northern Greece) earthquake sequence. Geophys. J. R. astron. Soc. 67:343–358.
    OpenUrl
    1. Soufleris C.,
    2. Jackson J.,
    3. King G.,
    4. Spencer C.,
    5. Scholz C.
    (1982) The 1978 earthquake sequence near Thessaloniki (northern Greece). Geophys. J. R. astron. Soc. 68:429–458.
    OpenUrl
    1. Spencer J.E.
    (1984) Role of tectonic denudation in warping and uplift of low angle normal faults. Geology 12:95–98.
    OpenUrlAbstract/FREE Full Text
    1. Stein R.S.,
    2. Barrientos S.E.
    Workshop XXVIII on the Borah Peak Earthquake US. Geol. Surv. Open-File Rep, The 1983 Borah Peak, Idaho, earthquake: geodetic evidence for deep rupture on a planar fault, eds Stein R., Bucknam R. In press.
    1. Tapponier P.,
    2. Molnar P.
    (1977) Active faulting and tectonics in China. J. geophys. Res. 82:2905–2930.
    OpenUrlCrossRefWeb of Science
    1. Tapponier P.,
    2. Molnar P.
    (1979) Active faulting and Cenozoic tectonics of the Tien Shan, Mongolia and Baykal regions. J. geophys. Res. 84:3425–3459.
    OpenUrlCrossRefWeb of Science
    1. Wernicke B.
    (1981) Low angle normal faults in the Basin and Range province: nappe tectonics in an extending orogen. Nature 291:645–648.
    OpenUrlCrossRefWeb of Science
    1. Wernicke B.,
    2. Burchfiel B.C.
    (1982) Modes of extensional tectonics. J. struct. Geol. 4:105–115.
    OpenUrlCrossRef
    1. White N.J.,
    2. Jackson J.A.,
    3. McKenzie D.P.
    The relationship between the geometry of normal faults and that of the sedimentary layers in their hanging walls. J. struct. Geol. In press.
    1. White S.
    (1976) The effects of strain on the microstructures, fabrics and deformation mechanisms in quartzites. Phil. Trans. R. Soc. London A283:69–86.
    OpenUrlCrossRef
    1. Wiens D.A.,
    2. Stein S.
    (1983) Age dependence of oceanic intraplate seismicity and implications for lithospheric evolution. J. geophys. Res. 88:6455–6468.
    OpenUrlCrossRef
    1. Wood R.,
    2. Barton P.
    (1983) Crustal thinning and subsidence in the North Sea. Nature 302:134–136.
    OpenUrlCrossRef
    1. Yielding G.
    (1985) Control of rupture by fault geometry during the 1980 El Asnam (Algeria) earthquake. Geophys. J. R. astron. Soc. 81:641–670.
    OpenUrl
    1. Ziegler P.
    (1983) Crustal thinning and subsidence in the North Sea. Nature 304:561.
    OpenUrl
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Geological Society, London, Special Publications: 28 (1)
Geological Society, London, Special Publications
Volume 28
1987
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Active normal faulting and crustal extension

J. A. Jackson
Geological Society, London, Special Publications, 28, 3-17, 1 January 1987, https://doi.org/10.1144/GSL.SP.1987.028.01.02
J. A. Jackson
Department of Earth Sciences, Bullard Laboratories, Madingley Rise Madingley Road, Cambridge CB3 0EZ, UK
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Active normal faulting and crustal extension

J. A. Jackson
Geological Society, London, Special Publications, 28, 3-17, 1 January 1987, https://doi.org/10.1144/GSL.SP.1987.028.01.02
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