Structure and geological history of the Congo Basin: an integrated interpretation of gravity, magnetic and reflection seismic data
Identifieur interne : 001336 ( Istex/Corpus ); précédent : 001335; suivant : 001337Structure and geological history of the Congo Basin: an integrated interpretation of gravity, magnetic and reflection seismic data
Auteurs : E. Kadima ; D. Delvaux ; S. N. Sebagenzi ; L. Tack ; S. M. KabeyaSource :
- Basin Research [ 0950-091X ] ; 2011-10.
Abstract
The stratigraphic, paleogeographic and tectonic evolution of the intracratonic Congo Basin in Central Africa has been revised on the basis of an integrated interpretation of gravity, magnetic and reflection seismic data, together with a literature review of papers sometimes old and difficult to access, map compilation and partial reexamination of outcrop and core samples stored in the Royal Museum for Central Africa (RMCA). The Congo Basin has a long and complex evolution starting in the Neoproterozoic and governed by the interplay of tectonic and climatic factors, in a variety of depositional environments.This multidisciplinary study involving 2D gravity and magnetic modeling as additional constraints for the interpretation of seismic profiles appears to be a powerful tool to investigate sedimentary basins where seismic data alone may be difficult to interpret. The tectonic deformations detected in the Congo Basin after the 1970–1984 hydrocarbon exploration campaign in the Democratic Republic of Congo (DRC) have been attributed to crustal contraction and basement uplift at the center of the basin, following a transpressional inversion of earlier graben structures. Two‐dimensional gravity and magnetic models run along key seismic lines suggest the presence of evaporite sequences in some of the deeper units of the stratigraphic succession, in the lateral continuity with those observed in the Mbandaka and Gilson exploration wells. The poorly defined seismic facies that led to the previous basement uplift interpretation of the crystalline basement is shown to correspond to salt‐rich formations that have been tectonically de‐stabilized. These features may be related to vertical salt‐tectonics connected to the near/far‐field effects of the late Pan‐African and the Permo‐Triassic compressive tectonic events that affected this African part of Gondwana.
Url:
DOI: 10.1111/j.1365-2117.2011.00500.x
Links to Exploration step
ISTEX:633AA6C4DD7DE83694F8438957C3285366400C06Le document en format XML
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Two‐dimensional gravity and magnetic models run along key seismic lines suggest the presence of evaporite sequences in some of the deeper units of the stratigraphic succession, in the lateral continuity with those observed in the Mbandaka and Gilson exploration wells. The poorly defined seismic facies that led to the previous basement uplift interpretation of the crystalline basement is shown to correspond to salt‐rich formations that have been tectonically de‐stabilized. 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Basin Research © 2011 Blackwell Publishing Ltd, European Association of Geoscientists & Engineers and International Association of Sedimentologists</copyright><eventGroup><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.9.3 mode:FullText" date="2011-09-01"></event><event type="publishedOnlineEarlyUnpaginated" date="2011-02-22"></event><event type="firstOnline" date="2011-02-22"></event><event type="publishedOnlineFinalForm" date="2011-09-01"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-08"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-15"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="499">499</numbering><numbering type="pageLast" number="527">527</numbering></numberingGroup><correspondenceTo> D. Delvaux, Royal Museum for Central Africa, B‐3080 Tervuren, Belgium. 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The Congo Basin has a long and complex evolution starting in the Neoproterozoic and governed by the interplay of tectonic and climatic factors, in a variety of depositional environments.This multidisciplinary study involving 2D gravity and magnetic modeling as additional constraints for the interpretation of seismic profiles appears to be a powerful tool to investigate sedimentary basins where seismic data alone may be difficult to interpret. The tectonic deformations detected in the Congo Basin after the 1970–1984 hydrocarbon exploration campaign in the Democratic Republic of Congo (DRC) have been attributed to crustal contraction and basement uplift at the center of the basin, following a transpressional inversion of earlier graben structures. Two‐dimensional gravity and magnetic models run along key seismic lines suggest the presence of evaporite sequences in some of the deeper units of the stratigraphic succession, in the lateral continuity with those observed in the Mbandaka and Gilson exploration wells. The poorly defined seismic facies that led to the previous basement uplift interpretation of the crystalline basement is shown to correspond to salt‐rich formations that have been tectonically de‐stabilized. These features may be related to vertical salt‐tectonics connected to the near/far‐field effects of the late Pan‐African and the Permo‐Triassic compressive tectonic events that affected this African part of Gondwana.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Structure and geological history of the Congo Basin: an integrated interpretation of gravity, magnetic and reflection seismic data</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Structure and geological history of the Congo Basin</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Structure and geological history of the Congo Basin: an integrated interpretation of gravity, magnetic and reflection seismic data</title></titleInfo><name type="personal"><namePart type="given">E.</namePart><namePart type="family">Kadima</namePart><affiliation>Service de Géophysique Appliquée, University of Lubumbashi, DR, Congo</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">D.</namePart><namePart type="family">Delvaux</namePart><affiliation>Royal Museum for Central Africa, Tervuren, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S. 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The Congo Basin has a long and complex evolution starting in the Neoproterozoic and governed by the interplay of tectonic and climatic factors, in a variety of depositional environments.This multidisciplinary study involving 2D gravity and magnetic modeling as additional constraints for the interpretation of seismic profiles appears to be a powerful tool to investigate sedimentary basins where seismic data alone may be difficult to interpret. The tectonic deformations detected in the Congo Basin after the 1970–1984 hydrocarbon exploration campaign in the Democratic Republic of Congo (DRC) have been attributed to crustal contraction and basement uplift at the center of the basin, following a transpressional inversion of earlier graben structures. Two‐dimensional gravity and magnetic models run along key seismic lines suggest the presence of evaporite sequences in some of the deeper units of the stratigraphic succession, in the lateral continuity with those observed in the Mbandaka and Gilson exploration wells. The poorly defined seismic facies that led to the previous basement uplift interpretation of the crystalline basement is shown to correspond to salt‐rich formations that have been tectonically de‐stabilized. These features may be related to vertical salt‐tectonics connected to the near/far‐field effects of the late Pan‐African and the Permo‐Triassic compressive tectonic events that affected this African part of Gondwana.</abstract><relatedItem type="host"><titleInfo><title>Basin Research</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0950-091X</identifier><identifier type="eISSN">1365-2117</identifier><identifier type="DOI">10.1111/(ISSN)1365-2117</identifier><identifier type="PublisherID">BRE</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>23</number></detail><detail type="issue"><caption>no.</caption><number>5</number></detail><extent unit="pages"><start>499</start><end>527</end><total>29</total></extent></part></relatedItem><identifier type="istex">633AA6C4DD7DE83694F8438957C3285366400C06</identifier><identifier type="DOI">10.1111/j.1365-2117.2011.00500.x</identifier><identifier type="ArticleID">BRE500</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2011 Musée royal de l'Afrique centrale / Koninklijk Museum voor Midden‐Africa. Basin Research © 2011 Blackwell Publishing Ltd, European Association of Geoscientists & Engineers and International Association of Sedimentologists</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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