Abstract
A unified seismic exploration program, consisting of 345 km of deep reflection profiling, a 200 km refraction profile, an expanding spread profile and near surface high-resolution measurements, revealed a strongly differentiated crust beneath the Black Forest. The highly reflective lower crust contains numerous horizontal and dipping reflectors at depths of 13–14 km down to the crust-mantle boundary (Moho). The Moho appears as a flat and horizontal first order discontinuity at a relatively shallow level of 25–27 km above a transparent upper mantle. In the seismic model based on near-vertical and wide-angle data the lower crust consists of lamellae with an average thickness of about 100 m and velocity contrasts increasing with depth. The upper crust is characterized by a discontinuous pattern of mostly dipping reflectors which are related to Hercynian overthrusting and accretion and to late-Hercyni an extensional faulting. A bright spot at 9.5 km depth is interpreted to be due to low-velocity material. The lower part of the upper crust appears as a relatively transparent zone which is also identified as a low-velocity zone situated directly above the laminated lower crust.
reprint of J.Geophys. (1987) 62:1–30
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Alfred-Wegener-Stiftung: 2nd International Symposium on Observation of the Continental Crust through Drilling, Abstracts, Seeheim, Federal Republic of Germany, Oct. 4–6, 1985, Bonn, 96 p., 1985.
Althaus, E., Behr, H.J., Eder, F.W., Goerlich, F., Maronde, D. and Ziegler, W.: Kontinentales Tiefbohrprogramm (“KTB”) (Continental Deep Drilling Program) of the Federal Republic of Germany - Advances and Status 1984, Terra Cognita, 4, 389–397, 1984.
Bartelsen, H., Lüschen, E., Krey, Th., Meissner, R., Schmoll, J. and Walther, Ch.: The Combined Seismic Reflection-Refraction Investigation of the Urach Geothermal Anomaly, in: The Urach Geothermal Project (ed. R. Haenel), Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, 247–262, 1982.
Behr, H.-J., Engel, W., Franke, W., Giese, P. and Weber, K.: The Variscan belt in Central Europe: main structures, geodynamic implications, open questions. In: H.J. Zwart, H.-J. Behr and J. Oliver (eds.), Appalachian and Hercynian Fold Belts. Tectonophysics, 109, 15–40, 1984.
Berktold, A., Musmann, G. Tezkan, B., Wohlenberg, J.: Electrical conductivity studies, Schwarzwald Working Group. - Abstract, 2nd International Symposium on Observation of the Continental Crust trough Drilling, Alfred-Wegener-Stiftung, Bonn, October 4–6, 1985, p. 70, 1985.
Blackburn, G.: Errors in stacking velocity - True velocity conversion over complex geologic situations, Geophysics, 45, 1465–1488, 1980.
Blundell, D.J. and Raynaud, B.: Modeling Lower Crust Reflections Observed on BIRPS Profiles, in: Reflection Seismology: A Global Perspective (eds.: Barazangi, M. and Brown, L.), Geodynamics Series Volume 13, American Geophysical Union, Washington, D.C., p. 287–295, 1986.
Bois, C., Cazes, M., Damotte, B., Galdéano, A., Hirn, A., Mascle, A., Matte, P., Raoult, J.F. and Torreilles, G.: Deep Seismic Profiling of the Crust in Northern France: The ECORS Project, in: Reflection Seismology: A Global Perspective, (eds.: M. Barazangi, L. Brown) Geodynamics Series Volume 13, American Geophysical Union, Washington, D.C., p. 21–29, 1986.
Bonjer, K.-P., Apopei, I., Lüschen, E., Fuchs, K. and Sandmeier, K.-J.: The Glottertal - 1986 Micro-Ear thquake Sequence - Evidence of Brittle Deformation in the Upper Crustal Reflector, Abstract of Poster Program, 2. KTB Kolloquium 19.9.–21.9.1986 Seeheim, p. 54, 1986.
Bortfeld, R.K., Gowin, J., Stiller, M., Baier, B., Behr, H.J., Heinrichs, T., Dürbaum, H.J., Hahn, A., Reichert, C., Schmoll, J., Dohr, G., Meissner, R., Bittner, R., Milkereit, B., Gebrande, H.: First results and preliminary interpretation of deep-reflection seismic recordings along profile DEKORP 2-South, J. Geophys., 57, 137–163, 1985.
Brown, L., Barazangi, M., Kaufman, S. and Oliver, J.: The First Decade of COCORP: 1974–1984, in: Reflection Seismology: A Global Perspective, (eds.: M. Barazangi, L. Brown) Geodynamics Series Volume 13, American Geophysical Union, Washington, D.C., p. 107–120, 1986.
Censor, Y: Finite Series-Expansion Reconstruction Methods, Proc. IEEE, 71, 409–419, 1983.
Chen, W.-P. and Molnar, P.: Focal depths of intercontinental and intraplate earthquakes and their implications for the thermal and mechanical properties of the lithosphere, J. Geophys. Res., 88, 4183–4214, 1983.
Christensen, N.I.: Compressional wave velocities in rocks at high temperatures and pressures. Critical thermal gradients, and crustal low-velocity zones. J. Geophys. Res., 84, 6849–6857, 1979.
Christensen, N.I. and Fountain, D.M.: Constitution of the lower crust based on experimental studies of seismic velocities in granulite. Geol. Soc. Amer. Bull., 86, 227–236, 1975.
Cook, F.A., Brown, L.D., Kaufman, S. and Oliver, J.E.: The COCORP seismic reflection traverse across the southern Appalachians, American Association of Petroleum Geologists Studies in Geology 14, 61 p., 1983.
Damotte, B., Fuchs, K., Lüschen, E., Wenzel, F., Schlich, R., and Torreilles, G.: Wide angle Vibroseis test across the Rhinegraben, Geophys. J.R. astr. Soc., 89, 313–318, 1987.
Deichmann, N. and Ansorge, J.: Evidence for Lamination in the Lower Continental Crust Beneath the Black Forest (Southwestern Germany), J. Geophys., 52, 109–118, 1983.
Demnati, A. and Dohr, G.: Reflexionsseismische Tiefensondierungen im Bereich des Oberrheingrabens und des Kraichgaues, Zeitschrift für Geophysik, 31, 229–245, 1965.
De Vries, D. and Berkhout, A.J.: Influence of Velocity Errors on the Focusing Aspects of Migration, Geophysical Prospecting 32, 629–648, 1984.
Dix, C.H.: Seismic velocities from surface measurements, Geophysics 20, 68–86, 1955.
Dinstel, W.L.: Velocity spectra and diffraction patterns, Geophysics, 36, 415–417, 1971.
Dohr, G.: Reflexionsseismische Messungen im Oberrheingraben mit digitaler Aufzeichnungstechnik und Bearbeitung. In: J.H. Illies and S. Mueller (eds.), Graben Problems, Schweizerbart’sehe Verlagsbuchhandlung, Stuttgart, 207–218, 1970.
Edel, J.B., Fuchs, K., Gelbke, C., Prodehl, C.: Deep Structure of the Southern Rhinegraben Area from Seismic Refraction Investigations. J. Geophys., 41, 333–356, 1975.
Emmermann, R.: A petrogenetic model for the origin and evolution of the Hercynian granite series of the Schwarzwald. N. Jb. Miner., Abh. 128, 219–253, 1977.
Finckh, P., Frei, W., Fuller, B., Johnson, R., Mueller, St., Smithson, S. and Sprecher, Chr.: Detailed Crustal Structure From a Seismic Reflection Survey in Northern Switzerland, in: Reflection Seismology: A Global Perspective, (eds.: M. Barazangi, L. Brown), Geodynamics Series Volume 13, American Geophysical Union, Washington, D.C., 43–54, 1986.
Fountain, D.M.: The Ivrea-Verbano and Strona-Ceneri Zones, northern Italy: a cross-section of the continental crust - New evidence from seismic velocities of rock samples. Tectonophysics, 33, 145–165, 1976.
Fountain, D.M. and Salisbury, M.H.: Exposed cross-sections through the continental crust: implications for crustal structure, petrology, and evolution. Earth and Planetary Science Letters, 56, 263–277, 1981.
Fromm, G.: Ermittlung statischer Grundkorrekturen, in: Erfassung seismischer Daten, 4. Mintrop-Seminar 1984, (eds.: L. Dresen, J. Fertig, H. Rüter, W. Budach ), 253–313, 1984.
Fuchs, K.: On the properties of deep crustal reflectors. Zeitschrift für Geophysik, 35, 133–149, 1969.
Fuchs, K. and Mueller, G.: Computation of synthetic seismograms with the reflectivity method and comparison with observations, Geophys. J.R. astr. Soc., 23, 417–433, 1971.
Fuchs, K., Bonjer, K.-P., Gajewski, D., Lüschen, E., Prodehl, C., Sandmeier, K.-J., Wenzel, F. and Wilhelm, H.: Crustal Evolution of the Rhinegraben Area. I. Exploring the Lower Crust in the Rhinegraben Rift by Unified Geophysical Experiments, Tectonophysics, 141, 261–275, 1987.
Fyfe, W.S. and Kerrich, R.: Fluids and thrusting. Chem. Geol., 49, 353–362, 1985.
Gajewski, D. and Prodehl, C.: Crustal evolution of the Rhinegraben area. II. Seismic refraction investigation of the Black Forest, Tectonophysics, 142, 27–48, 1987.
Gajewski, D., Holbrook W.S., and Prodehl C.: Three-dimensional crustal structure of Southwest-Germany, derived from seismic-refraction data, Tectonophysics, 142, 49–70, 1987.
Gazdag, J.: Modeling of the acoustic wave equation with transform methods, Geophysics, 46, 854–859, 1981.
Gebrande, H.: CMP-Refraktionsseismik, in: Seismik auf neuen Wegen, 6. Mintrop-Seminar 1986, (eds.: L. Dresen, J. Fertig, H. Rüter, W. Budach ), 191–205, 1986.
Gerke, K.: Die Karte der Bouguer-Isanomal ien 1:1.000.000 von Westdeutschland. Frankfurt/Main: Institut für Angewandte Geodäsie, 1957.
Giese, P.: Depth Calculation, in: P. Giese, C. Prodehl, A. Stein (eds.), Explosion Seismology in Central Europe, 146–161, 1976.
Gordon, R., Bender R., Herman G.T.: Algebraic reconstruction techniques (ART) for three-dimensional electron microscopy and x-Ray photography. J. theor. Biol. 29, 471–481, 1970.
Götze, H.-J., Schmalfeldt, J. and Wagener, M.: Gravimetrische und magnetische Vorerkundung im Schwarzwald, internal KTB communication, reported in v. Gehlen et al. (eds.), Kontinentales Tiefbohrprogramm der Bundesrepublik Deutschland KTB, Ergebnisse der Vorerkundungsarbeiten Lokation Schwarzwald, 2. KTB-Kol loquium Seeheim/Odenwald, 19.9.-21.9.1986, p. 29–30, 1986.
Hacker, W. and Hirschmann, G.: Ältere und jüngere Thrust-Tektonik im Zentralschwarzwälder Gneiskomplex, internal KTB communication, reported in v. Gehlen et al. (eds.), Kontinentales Tiefbohrprogramm der Bundesrepublik Deutschland KTB, Ergebnisse der Vorerkundungsarbeiten Lokation Schwarzwald, 2. KTB-Kol loquium Seeheim/Odenwald, 19.9.– 21.9.1986, p. 76 ff., 1986.
Hagedoorn, J.G.: The Plus-Minus Method of Interpreting Seismic Refraction Sections. Geophysical Prospecting, vol. 7, 158–182, 1959.
Hajnal, Z. and Sereda, I.T.: Maximum uncertainty of interval velocity estimates, Geophysics, 46, 1543–1547, 1981.
Hale, L.D. and Thompson, G.A.: The Seismic Reflection Character of the Continental Mohorovicic Discontinuity. J. Geophys. Res., 87, 4625–4635, 1982.
Illies, J.H.: Mechanism of Graben Formation, Tectonophysics, 73, 249–266, 1981.
Illies, J.H. and Fuchs, K. (eds.): Approaches to Taphrogenesis, Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, 460 p., 1974.
Illies, J.H. and Mueller, S. (eds.): Graben Problems. Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, 316 p., 1970.
Jones, T.D. and Nur, A.: The Nature of Seismic Reflections From Deep Crustal Fault Zones. J. Geophys. Res., 89, 3153–3171, 1984.
Kern, H.: P- and S-Wave Velocities in Crustal and Mantle Rocks under the Simultaneous Action of High Confining Pressure and High Temperature and the Effect of the Rock Microstructure. In: High-Pressure Researches in Geoscience (ed.: W. Schreyer), E. Schweizerbart’sehe Verlagsbuchhandlung, Stuttgart, 15–45, 1982.
Kern, H. and Schenk, V.: Elastic wave velocities in rocks from a lower crustal section in southern Calabria (Italy). Physics of the Earth and Planetary Interiors, 40, 147–160, 1985.
Ketelsen, K., Marschall, R., Fromm, G.: Automatic Picking of First Arrivals with two-sided signals (Vibroseis), 45th E.A.E.G.-Meeting, Oslo, Norway, 49 p, 1983.
Klein, H. and Wimmenauer, W.: Eclogites and their retrograde transformation in the Schwarzwald. N. Jb. Miner., Mh. 1984, 25–38, 1984.
Klemperer, S.L., Hauge, T.A., Hauser, E.C., Oliver, J.E. and Potter, C.J.: The Moho in the northern Basin and Range province, Nevada, along the COCORP 40°N seismic-reflection transect. Geological Society of American Bulletin, 97, 603–618, 1986.
Kosloff, D.D. and Baysal, E.: Forward modeling by a Fourier method. Geophysics, 47, 1402–1412, 1982.
Kremenetsky, A.A. and Ovchinnikov, L.N.: The Precambrian continental crust: its structure, composition and evolution as revealed by deep drilling in the U.S.S.R. Precambrian Res., 33, 11–43, 1987.
Lerwill, W.E.: The Amplitude and Phase Response of a Seismic Vibrator. Geophysical Prospecting, 29, 503–528, 1981.
Lippolt, H.J., Schleicher, H. and Raczek, I.: Rb-Sr systematics of Permian volcanics in the Schwarzwald (SW Germany). Contr. Min. Petr., 84, 272–280, 1983.
Lorenz, V. and Nicholls, I.A.: Plate and intraplate processes of Hercynian Europe during the Late Paleozoic. Tectonophysics, 107, 25–56, 1984.
LOTEM working group: Schwarzwald, LOTEM-Tiefensondierung, Abstract of Poster Program, 2. KTB-Kol loquium, 19.9.–21.9.1986, Seeheim, p. 48, 1986.
Matte, Ph.: Tectonics and plate tectonics model for the Variscan belt of Europe, Tectonophysics, 126, 329–374, 1986.
Matthews, D.H. and Cheadle, M.J.: Deep Reflections from the Caledonides and Variscides West of Britain and Comparison with the Himalayas, in: Reflection Seismology: A Global Perspective, (eds.: M. Barazangi, L. Brown), Geodynamics Series Volume 13, American Geophysical Union, Washington, D.C., p. 5–19, 1986.
Meissner, R. and Strehlau, J.: Limits of stresses in continental crusts and their relation to the depth-frequency distribution of shallow earthquakes, Tectonics, 1, 73–89, 1982.
Meissner, R., Lüschen, E. and Flüh, E.R.: Studies of the continental crust by near-vertical reflection methods: A review, Physics of the Earth and Planetary Interiors, 31, 363–376, 1983.
Meissner, R. and Wever, Th.: Nature and Development of the Crust According to Deep Reflection Data from the German Variscides, in: Reflection Seismology: A Global Perspective, (eds.: M. Barazangi, L. Brown), Geodynamics Series Volume 13, American Geophysical Union, Washington, D.C., P. 31–42, 1986.
Miller, M.K.: Stacking of Reflections From Complex Structures, Geophysics, 39, 427–440, 1974.
Morton, J.L. and Sleep, N.H.: Seismic Reflections From a Lau Basin Magma Chamber. In: Geology and offshore resources of Pacific island arcs - Tonga region, Circum-Pacific Council for Energy and Mineral Resources Earth Science Series, (eds.: D.W. Scholl and T.L. Vallier), vol. 2, Houston, 441–453, 1985.
Mueller, S.: A new model of the continental crust, in: The Earth’s Crust, Geophys. Monogr. Series, 20, American Geophysical Union, Washington, D.C., 289–317, 1977.
Mueller, St., Peterschmitt, E., Fuchs, K. and Ansorge, J.: Crustal Structure Beneath the Rhinegraben From Seismic Refraction and Reflection Measurements. Tectonophysics, 8, 529–542, 1969.
NAGRA: Technischer Bericht 85–01, Textband und Bei lagenbände A und B, Nationale Genossenschaft für die Lagerung radioaktiver Abfälle, Baden, 1985.
Oliver, J.E.: Changes at the crust-mantle boundary, Nature, 299, 398–399, 1982.
Peddy, C., Brown, L.D. and Klemperer, S.L.: Interpreting the Deep Structure of Rifts with Synthetic Seismic Sections. In: Reflection Seismology: A Global Perspective (eds.: M. Barazangi and L. Brown), Geodynamic Series Volume 13, American Geophysical Union, Washington, D.C., 301–311, 1986.
Plaumann, S., Groschopf, R., and Schädel, K.: Kompilation einer Schwerekarte und einer geologischen Karte für den mittleren und nördlichen Schwarzwald mit einer Interpretation gravimetrischer Detai IVermessungen. Geol. Jb., E 33, 15–30, 1986.
Prodehl, C., Ansorge, J., Edel, J.B., Emter, D., Fuchs, K., Mueller S. and Peterschmitt, E.: Explosion Seismology Research in the Central and Southern Rhine Graben - A Case History, in: Explosion Seismology in Central Europe (eds.: Giese, P., Prodehl, C. and Stein, A.), Springer Verlag, Berlin, 313–328, 1976.
Rühl, Th.: Tauchwellen-Tomographie für Stripping-Korrekturen und geologische Interpretationen bei den reflexionsseismischen KTB-Profilen im Schwarzwald. Diploma Thesis, Geophysical Institute of the University of Karlsruhe, 1987.
Sandmeier, K.-J. and Wenzel, F.: Synthetic Seismograms for a Complex Crustal Model, Geophysical Research Letters, 13, 22–25, 1986.
Schenk, V.: Petrology of felsic granulites, metapelites, metabasics, ultramafics, and metacarbonates from Southern Calabria (Italy): propaganda metamorphism, uplift and cooling of a former lower crust. J. Petr., 25, 255–298, 1984.
Schmucker, U. and Tezkan, B., Zur Deutung regional einheitlicher Richtungsabhängigkeiten tellurischer Variationen, 47th Ann. Meeting of Dtsch. Geophys. Gesell., Clausthal-Zellerfeld, 31.3.–4. 4. 1987.
Schnell, H.P.: Untersuchung des Einflusses oberflächennaher Schichten auf seismische Signale und Beiträge zur Optimierung des Vibroseis- Verfahrens. Diploma Thesis, Geophysical Institute of the University of Karlsruhe, 1987.
Sheriff, R.E. and Geldart, L.P.: Exploration Seismology, Volume 2, Data-processing and interpretation, Cambridge University Press, Cambridge, 221 p, 1983.
Sittig, E.: Zur geologischen Charakterisierung des Mol danubikums am Oberrhein (Schwarzwald). Oberrh. Geol. Abh., 18, 119–161, 1969.
Slichter, L.B.. The Theory of the Interpretation of Seismic Travel Time Curves in horizontal Structures, Physics, 3, 273–295, 1932.
Smithson, S.B., Johnson R.A. and Hurich, C.A.: Crustal Reflections and Crustal Structure, in: Reflection Seismology: The Continental Crust, (eds.: M. Barazangi, L. Brown), Geodynamics Series Volume 14, American Geophysical Union, Washington, D.C., 21–32, 1986.
Stenger, R.: Petrology and Geochemistry of the Basement Rocks of the Research Drilling Project Urach 3., in: R. Haenel (ed.), The Urach Geothermal Project. Schweizerbart’sche Verlagsbuchhandlung, Stuttgart, 41–47, 1982.
Stiefel, A., Wilhelm, H., Finkbeiner, K., Haack, U.: Geothermal Studies, Schwarzwald, Abstract of poster, 2nd International Symposium on Observation of the Continental Crust through Drilling, Alfred-Wegener- Stiftung, October 4–6, 1985, Seeheim, p. 72, 1985.
Vogelsang, D.: Geothermi sehe und geologische Vorerkundung der Tiefbohr- lokation Oberpfalz und Schwarzwald. Teilgebiet Bohrlochgeophysik Schwarzwald. Bericht NLfB Hannover, Archiv-Nr. 99126, 1986.
Warner, M.: Migration - why doesn’t it work for deep continental data, Geophys. J.R. astr. Soc., 89, 21–26, 1987.
Walther, Ch., Trappe, H. and Meissner, R.: The detailed velocity structure of the Urach geothermal anomaly. J. Geophys. 59, 1–10, 1986.
Wenzel, F., Sandmeier, K.-J., and Wälde, W.: Properties of the lower crust from modelling refraction and reflection data. - submitted to J. Geophys. Res., 1987.
Wimmenauer, W. and Adam, A.: High-pressure phenomena in acid rocks accompanying eclogites in the Schwarzwald (SW Germany). Terra cognita, 5, p. 426, 1985.
Winterstein, D.F.: Anisotropy effects in P-wave and SH-wave stacking velocities contain information on lithology. Geophysics, 51, 661–672, 1986.
Zucca, J.J.: The crustal structure of the southern Rhinegraben from re-interpretation of seismic refraction data. J. Geophys., 55, 13–22, 1984.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Lüschen, E. et al. (1989). Near-Vertical and Wide-Angle Seismic Surveys in the Schwarzwald. In: Emmermann, R., Wohlenberg, J. (eds) The German Continental Deep Drilling Program (KTB). Exploration of the Deep Continental Crust. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-74588-1_14
Download citation
DOI: https://doi.org/10.1007/978-3-642-74588-1_14
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-74590-4
Online ISBN: 978-3-642-74588-1
eBook Packages: Springer Book Archive