Description: The ca. 163 km long KTB Line 1 was recorded in 1984 as part of the DEKORP, the German Continental Seismic Reflection Program, in the context of presite investigations for the KTB, the German Continental Deep Drilling Project. KTB 8401 is one of the four KTB seismic reflection lines, which were performed in the Black Forest, one of the candidates for the KTB drilling site. The purpose of the investigations was to reveal a strongly differentiated crust beneath the Black Forest with high-fold near-vertical incidence vibroseis acquisition. The main focus was on the crustal structure of the Black Forest massif with respect to the role and extent of Variscan thrust and extension tectonics and the geometry of deep crustal reflection patterns. Details of the experiment, first results and interpretations were published by Lüschen et al. (1987) and KTB-Research Group Black Forest (1987). Results discussed together with the KTB surveys in the Upper Palatinate were presented in a number of works which can be found in Emmermann & Wohlenberg (1989). The Technical Report of KTB 8401 gives complete information about acquisition and processing parameters. The European Variscides, extending from the French Central Massif to the East European Platform, originated during the collision between Gondwana and Baltica in the Late Palaeozoic. Due to involvement of various crustal blocks in the orogenesis, the mountain belt is subdivided into distinct zones. The external fold-and-thrust belts of the Rhenohercynian and Saxothuringian as well as the predominantly crystalline body of the Moldanubian dominate the central European segment of the Variscides. Polyphase tectonic deformation, magmatism and metamorphic processes led to a complex interlinking between the units. The Black Forest is the uplifted eastern shoulder of the Upper Rhine Graben within the internal Moldanubian zone, where rocks of the Variscan basement complex of Central Europe are exposed. The crystalline basement of the Black Forest consists of high-grade gneisses and migmatites intruded by Variscan granites. It was uplifted during the Tertiary rift movements of the Rhine Graben. The NS running profile 8401 follows the morphological axis of the Black Forest across the Central Black Forest Gneiss Complex and the adjacent Variscan thrust zones: the southward-dipping Saxothuringian-Moldanubian suture zone in the north and the NW-dipping Badenweiler-Lenzkirch crustal thrust zone in the south. In the west and the east the Central Gneiss Complex is bounded by the Tertiary Thinegraben and gently eastward-dipping Mesozoic sediments respectively. The central part of the Gneiss Complex is covered by two intersecting profiles generating a triangle of 3-4 km side length together with line 8401. Farther to the south KTB 8401 is crossed by line KTB 8514.
Global identifier:
Doi(
"10.5880/GFZ.DEKORP.KTB8401.001",
)
Origins: /Wissenschaft/Helmholtz-Gemeinschaft/GFZ
Tags: Schwarzwald ? Sediment ? Tiefbohrung ? Badenweiler-Lenzkirch zone ? Central Black Forest Gneiss Complex ? DEKORP ? Deutsches Kontinentales Reflexionsseismisches Programm ? EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES > SEISMIC PROFILE ? EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS ? KTB ? Kontinentales Tiefbohrprogramm ? Mohorovičić discontinuity ? Moldanubian ? Saxothuringian-Moldanubian suture zone ? Variscan Orogenic Belt ? Vibroseis acquisition ? crustal-scale seismic survey ? deep crustal structure ? exploration drilling ? lithosphere > earth's crust ? near-vertical incidence seismic reflection ? seismic risks ? tectonothermal activity ?
License: cc-by-nc/4.0
Language: Englisch/English
Issued: 2022-01-01
Time ranges: 2022-01-01 - 2022-01-01
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