A new tectonic model for the Cameroon Line, Central Africa
Identifieur interne : 00E577 ( Main/Exploration ); précédent : 00E576; suivant : 00E578A new tectonic model for the Cameroon Line, Central Africa
Auteurs : C. Moreau [Sénégal] ; J.-M Regnoult ; B. Déruelle ; B. Robineau [Sénégal]Source :
- Tectonophysics [ 0040-1951 ] ; 1987.
English descriptors
- Teeft :
- Adamawa, Adamawa fault zone, Adamawa faults, Adamawa trend, Anorogenic, Anorogenic complexes, Anorogenie complexes, Atlantic ocean, Autocorrelation, Autocorrelation analysis, Autocorrelation graph, Basin, Cameroon, Cameroon line, Cameroon line trend, Cameroun, Cameroun minist, Central africa, Central cameroon, Central part, Circular features, Cretaceous, Cretaceous basins, Deruelle, Dunlop, Earth planet, Emplacement, Fault zone, Fracture, Gash, Geol, Granites ultimes, High density, Lake chad, Lasserre, Lineament, Lineament intersections, Magmatic, Magmatic activity, Main trends, Major fault, Massif, Moreau, Normal faults, Northern cameroon, Northern part, Other hand, Prominent role, Regnoult, Reyre, Riedel, Riedel model, Satellite imagery, Shear zone, Shear zones, Southern part, Submeridian, Submeridian trend, Subvolcanic, Subvolcanic complexes, Subvolcanic massifs, Subvolcanic plugs, Subvolcanic ring complexes, Tectonic, Tectonic model, Tension gash, Tensional regime, Tertiary, Transtensional regime, Univ, Volcanic, Volcanic activity, Volcanic areas, Volcanic complexes, Volcano, West africa.
Abstract
Abstract: The Cameroon Line, a major geological feature in Central Africa, has been considered successively as a series of horsts and grabens, a continental rift and a mega-shear zone. It is marked out by about 60 anorogenic complexes and a dozen volcanic centres, all of which have alkaline affinity.Remote sensing allows us recognition of the main lineament trends: N70°, N-S, N135° and E-W, while autocorrelation analysis reveals a major fault zone striking N30° in western Cameroon and N15° in the northern region. A mega left-lateral shear zone is the model that best accounts for the fracture pattern and associated features such as linear and circular structures alignment of subvolcanic complexes, syntectonic leucogranites marking out older shear zones and vein dykes. The N70° Adamawa fault zone, a Pan-African fracture reworked during Albian-Aptian times, is the only shear zone of continental scale that could have initiated “en echelon” mega-tension gashes within the Cameroon Line during a Cainozoic left-lateral transcurrent movement.
Url:
DOI: 10.1016/0040-1951(87)90206-X
Affiliations:
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Moreau</name><affiliation wicri:level="1"><country xml:lang="fr">Sénégal</country><wicri:regionArea>Département de Géologie, Faculté des Sciences</wicri:regionArea><wicri:noRegion>Faculté des Sciences</wicri:noRegion></affiliation></author><author><name sortKey="Regnoult, J M" sort="Regnoult, J M" uniqKey="Regnoult J" first="J.-M" last="Regnoult">J.-M Regnoult</name><affiliation><wicri:noCountry code="subField">YaoundéCameroun</wicri:noCountry></affiliation></author><author><name sortKey="Deruelle, B" sort="Deruelle, B" uniqKey="Deruelle B" first="B" last="Déruelle">B. Déruelle</name><affiliation><wicri:noCountry code="subField">YaoundéCameroun</wicri:noCountry></affiliation></author><author><name sortKey="Robineau, B" sort="Robineau, B" uniqKey="Robineau B" first="B" last="Robineau">B. Robineau</name><affiliation wicri:level="1"><country xml:lang="fr">Sénégal</country><wicri:regionArea>Département de Géologie, Faculté des Sciences</wicri:regionArea><wicri:noRegion>Faculté des Sciences</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Tectonophysics</title><title level="j" type="abbrev">TECTO</title><idno type="ISSN">0040-1951</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1987">1987</date><biblScope unit="volume">141</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="317">317</biblScope><biblScope unit="page" to="334">334</biblScope></imprint><idno type="ISSN">0040-1951</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0040-1951</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Adamawa</term><term>Adamawa fault zone</term><term>Adamawa faults</term><term>Adamawa trend</term><term>Anorogenic</term><term>Anorogenic complexes</term><term>Anorogenie complexes</term><term>Atlantic ocean</term><term>Autocorrelation</term><term>Autocorrelation analysis</term><term>Autocorrelation graph</term><term>Basin</term><term>Cameroon</term><term>Cameroon line</term><term>Cameroon line trend</term><term>Cameroun</term><term>Cameroun minist</term><term>Central africa</term><term>Central cameroon</term><term>Central part</term><term>Circular features</term><term>Cretaceous</term><term>Cretaceous basins</term><term>Deruelle</term><term>Dunlop</term><term>Earth planet</term><term>Emplacement</term><term>Fault zone</term><term>Fracture</term><term>Gash</term><term>Geol</term><term>Granites ultimes</term><term>High density</term><term>Lake chad</term><term>Lasserre</term><term>Lineament</term><term>Lineament intersections</term><term>Magmatic</term><term>Magmatic activity</term><term>Main trends</term><term>Major fault</term><term>Massif</term><term>Moreau</term><term>Normal faults</term><term>Northern cameroon</term><term>Northern part</term><term>Other hand</term><term>Prominent role</term><term>Regnoult</term><term>Reyre</term><term>Riedel</term><term>Riedel model</term><term>Satellite imagery</term><term>Shear zone</term><term>Shear zones</term><term>Southern part</term><term>Submeridian</term><term>Submeridian trend</term><term>Subvolcanic</term><term>Subvolcanic complexes</term><term>Subvolcanic massifs</term><term>Subvolcanic plugs</term><term>Subvolcanic ring complexes</term><term>Tectonic</term><term>Tectonic model</term><term>Tension gash</term><term>Tensional regime</term><term>Tertiary</term><term>Transtensional regime</term><term>Univ</term><term>Volcanic</term><term>Volcanic activity</term><term>Volcanic areas</term><term>Volcanic complexes</term><term>Volcano</term><term>West africa</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: The Cameroon Line, a major geological feature in Central Africa, has been considered successively as a series of horsts and grabens, a continental rift and a mega-shear zone. It is marked out by about 60 anorogenic complexes and a dozen volcanic centres, all of which have alkaline affinity.Remote sensing allows us recognition of the main lineament trends: N70°, N-S, N135° and E-W, while autocorrelation analysis reveals a major fault zone striking N30° in western Cameroon and N15° in the northern region. A mega left-lateral shear zone is the model that best accounts for the fracture pattern and associated features such as linear and circular structures alignment of subvolcanic complexes, syntectonic leucogranites marking out older shear zones and vein dykes. The N70° Adamawa fault zone, a Pan-African fracture reworked during Albian-Aptian times, is the only shear zone of continental scale that could have initiated “en echelon” mega-tension gashes within the Cameroon Line during a Cainozoic left-lateral transcurrent movement.</div></front></TEI><affiliations><list><country><li>Sénégal</li></country></list><tree><noCountry><name sortKey="Deruelle, B" sort="Deruelle, B" uniqKey="Deruelle B" first="B" last="Déruelle">B. Déruelle</name><name sortKey="Regnoult, J M" sort="Regnoult, J M" uniqKey="Regnoult J" first="J.-M" last="Regnoult">J.-M Regnoult</name></noCountry><country name="Sénégal"><noRegion><name sortKey="Moreau, C" sort="Moreau, C" uniqKey="Moreau C" first="C" last="Moreau">C. Moreau</name></noRegion><name sortKey="Robineau, B" sort="Robineau, B" uniqKey="Robineau B" first="B" last="Robineau">B. Robineau</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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