f0438284-87df-43fd-8a64-eb0e5adc331a 06a73c56-06a2-40d8-b806-466222b0760d Geophysik Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) geodatenmanagement@bgr.de https://produktcenter.bgr.de pointOfContact 2023-11-16 INSPIRE Metadata Implementing Rules: Technical Guidelines based on EN ISO 19115 and EN ISO 19119 n/a EPSG:4326 Processed seismic data of Cruise BGR98 1998 Prozessierte seismische Daten der Fahrt BGR98 1998 BGR98 1998 1999-02-24 19ed7cb3-b2fa-2172-0a71-f28868dc209f From 24th November 1998 to 24th February 1999 BGR in cooperation with YPF (Yacimientos Petrolíferos Fiscales) and SHN (Servicio de Hidrografía Naval) conducted three seismic surveys along the passive continental margin of Argentine. The seismic vessel M/V Akademik Lazarev which is operated by SMNG (Sevmorneftegeofizika) was used for these cruises. Although the seafloor spreading history of the South Atlantic Ocean is very well defined, the development of the continental margins poses still great problems to a profound understanding. When break-up of Gondwana started in Middle Jurassic, South Africa and South America remained connected. Their break-up started in Early Cretaceous, possibly propagating from south to north. Before break-up, huge tholeiitic flood basalts were extruded near the future rift, namely the Paraná basalts in Brazil and the Etendeka basalts in Namibia. It is likely that these basalts are caused by a large mantle plume. As the flood basalts were predecessors to the break-up, often a causal relationship is assumed. The dipping reflector sequences along large parts of the continental margins of South America and South Africa are interpreted as indications of the plume influence. Investigations along many passive margins have meanwhile shown that dipping reflector sequences exist along most of them. These so-called volcanic margins are the normal ones, the non-volcanic margins are the exception. For many years, it had been assumed that the hydrocarbon potential of volcanic margins is very low. The discovery of the Kudu gas field has demonstrated that this assumption is not valid in general. This increases our interest in continuing the investigation of volcanic passive margins and the variability of their structure along strike. BGR has carried out already two marine geophysical cruises off Argentina, namely with M/V EXPLORA in 1985 and with FS SONNE in 1993. These surveys had shown locally the existence of threefold dipping reflector sequences (Hinz et al., 1999). Furthermore, it had turned out that not everywhere they are accompanied by the strong magnetic G anomaly (Rabinowitz & LaBrecque, 1979). The main objectives of the BGR98 cruise were: (1) Investigation and mapping of the zone of the seaward dipping reflectors (SDR) (reflection + refraction seismic) (2) Investigation of the sedimentary column within this zone (reflection seismic) (3) Setting up a seismostratigraphy based on the seismic records obtained during the cruise and the information from the previous cruises (BGR87, SO85) as well as on additional well information (4) Comparison of the argentine seismic data with seismic data of the conjugate volcanic margin off Namibia (BGR 87). The study area is located offshore Argentine, extending from about 37° 20' S to 45° 40' S and from about 61° 10' W to 52° 00' W. It comprises the Colorado Basin as well as the outermost shelf, slope and rise of the continental margin with water depths up to 5000 m. In der Zeit vom 24.11.1998 bis 24.02.1999 hat die BGR drei Expeditionen im Bereich des argentinischen Kontinentrandes durchgeführt. Kooperationsparter hierbei waren YPF (Yacimientos Petrolíferos Fiscales) und SHN (Servicio de Hidrografía Naval). Als Plattform für die Arbeiten diente das Seismik-Schiff MS Akademik Lazarev von SMNG (Sevmorneftegeofizika). Obwohl viele Details der ozeanische Entwicklungsgeschichte des Südatlantiks bekannt sind, ist der Prozess des initialen kontinentalen Aufbrechens noch weitgehend unverstanden. Beim Zerbrechen von Gondwana im mittleren Jura waren Südamerika und das südliche Afrika noch verbunden. Hier begann das Aufbrechen in der frühen Kreide und setzte sich von Süden nach Norden fort. Vor dem Aufbrechen wurden großräumig Flutbasalte abgelagert – die Parana-Basalte in Brasilien und die Etendeka-Basalte in Namibia. Die Ursache dieser Basalte wird im unteren Mantel vermutet. Als weiteres Anzeichen dieser magmatischen Anomalie finden sich seewärts einfallende Reflektorfolgen sowohl am südamerikanischen als auch am südafrikanischen Kontinentrand. Diese Reflektorfolgen finden sich weltweit an einer Vielzahl passiver Kontinentränder, so dass der vulkanisch geprägte passive Kontinentrand als der Normalfall zu betrachten ist. Generell wurde das Kohlenwasserstoff-Potential von vulkanischen Rändern als gering eingestuft. Die Entdeckung des Kudu-Gasfeldes vor Namibia zeigte jedoch, dass diese Aussage nicht generell gültig ist. Diese Tatsache ist Ausgangspunkt für die von der BGR durchgeführte systemtische Erkundung ausgewählter vulkanischer Ränder. Vorhergehende Forschungsarbeiten vor Argentinien wurden 1985 mit MS Explora und 1993 mit FS Sonne durchgeführt. Diese Untersuchungen zeigten, dass die seewärts einfallenden Reflektoren in drei Sequenzen unterteilt werden können, und das die begleitende magnetische G-Anomalie unterschiedlich stark ausgeprägt ist. Die Hauptarbeitspunkte der Untersuchungen in 1998/1999 waren: (1) Detaillierte Kartierung der Zonen mit seewärts einfallenden Reflektorfolgen (SDRs) (2) Abbildung der sedimentären Säule (3) Entwicklung eines darauf aufbauenden seismostratigraphischen Prinzips (4) Vergleich zum konjugierenden Kontinentrand vor Namibia Das Untersuchungsgebiet vor Argentinien erstreckt sich von 37° 20' S bis 45° 40' S und von 61° 10' W bis 52° 00' W. Es enthält sowohl das Colorado Becken als auch den äußeren Schelf und erstreckt sich über den Kontinenthang bis hin zu Wassertiefen von 5000 m. completed Federal Institute for Geosciences and Natural Resources Stilleweg 2 Hannover 30655 Marine_Seismik@bgr.de pointOfContact https://download.bgr.de/bgr/marineseismik/BGR98/Beispielbild/bgr98.png Geologie geology GEMET - INSPIRE themes, version 1.0 2008-06-01 geophysics Geophysik raw material Rohstoff GEMET - Concepts, version 2.4 2010-01-13 Marine geology Meeresgeologie Seismics Seismik Two-dimensional seismic reflection zweidimensionale Reflektionsseismik Southwest Atlantic Ocean Südwestatlantik Argentinien Argentina Es gelten keine Zugriffsbeschränkungen Allgemeine Geschäftsbedingungen, siehe http://www.bgr.bund.de/AGB - General terms and conditions, see http://www.bgr.bund.de/AGB_en. Die bereitgestellten Informationen sind bei Weiterverwendung wie folgt zu zitieren: Datenquelle: BGR98 1998, (c) BGR, Hannover, 2018 geoscientificInformation true -61.2259 -52.20 -44.8895 -37.6963 Shapefile n/a 3 https://download.bgr.de/bgr/marineseismik/bgr98/shp/bgr98.zip BGR98 1998 (Shapefile) BGR98 1998 im Format ESRI Shape download http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282175 Profile BGR98-001 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282172 Profile BGR98-001A http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282173 Profile BGR98-001B http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282174 Profile BGR98-001C http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282177 Profile BGR98-002 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282176 Profile BGR98-002A http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1399457 Profile BGR98-003 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282179 Profile BGR98-004 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282178 Profile BGR98-004A http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282181 Profile BGR98-005 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282180 Profile BGR98-005A http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282182 Profile BGR98-006 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282183 Profile BGR98-007 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282184 Profile BGR98-008 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282185 Profile BGR98-009 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282186 Profile BGR98-010 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282187 Profile BGR98-011 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282189 Profile BGR98-012 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282188 Profile BGR98-012A http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282190 Profile BGR98-013 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282191 Profile BGR98-014 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282192 Profile BGR98-015 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282193 Profile BGR98-016 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282194 Profile BGR98-017 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282195 Profile BGR98-018 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282196 Profile BGR98-019 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282197 Profile BGR98-020 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1399458 Profile BGR98-021 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282198 Profile BGR98-022 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282199 Profile BGR98-023 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282201 Profile BGR98-024 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282200 Profile BGR98-024A http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511328 Profile BGR98-024B http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282202 Profile BGR98-025 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282203 Profile BGR98-026 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282204 Profile BGR98-027 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282205 Profile BGR98-028 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282206 Profile BGR98-029 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282207 Profile BGR98-030 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282208 Profile BGR98-031 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282209 Profile BGR98-032 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1399459 Profile BGR98-033 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1282210 Profile BGR98-034 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511329 Profile BGR98-035 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511330 Profile BGR98-038 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511331 Profile BGR98-039 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511332 Profile BGR98-040 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511333 Profile BGR98-041 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511334 Profile BGR98-042 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511335 Profile BGR98-043 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511336 Profile BGR98-046 http://www.geo-seas.eu/v_cdi_v3/print_ajax.asp?n_code=1511337 Profile BGR98-047 https://services.bgr.de/geophysik/mssp Karte im BGR-Geoviewer VERORDNUNG (EG) Nr. 1089/2010 DER KOMMISSION vom 23. November 2010 zur Durchführung der Richtlinie 2007/2/EG des Europäischen Parlaments und des Rates hinsichtlich der Interoperabilität von Geodatensätzen und -diensten 2010-12-08 siehe dazu die angegebene Durchführungsbestimmung During the period from 24th November 1998 to 24th February 1999 BGR acquired seismic lines off the Atlantic coast of South America. The lines BGR98-001 to BGR98-047 consist of stacked data with exception of lines BGR98-003, BGR98-021 and BGR98-033 which are migrated data and lines BGR98-036, BGR98-037, BGR98-037A, BGR98-044 and BGR98-045 which consist of raw data.