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Article: Did South America and West Africa Marry and Divorce or Was it a Long-lasting Relationship?

TitleDid South America and West Africa Marry and Divorce or Was it a Long-lasting Relationship?
Authors
KeywordsCollisional orogeny
Gondwana
Rodinia
South America
West Africa
Issue Date2002
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcr
Citation
Gondwana Research, 2002, v. 5 n. 3, p. 591-596 How to Cite?
AbstractThe 2.1-2.0 Ga Transamazonian orogen in South America can be well correlated with the 2.1-2.0 Ga Eburnean orogen along the western margin of West Africa. Both the orogens are characterized by early tangential tectonics, marked by large-scale thrusts and sinistral strike-slip faults, followed by later transcurrent tectonics, marked by dextral shear zones. Metamorphic evolution of the two orogens involved an initial phase of crustal thrusting and thickening, followed by exhumation and final cooling. These suggest that South America and West Africa may have been jointed along the Transamazonian-Eburnean orogen at 2.1-2.0 Ga. This is supported by the presence of ∼2.0 Ga fluvio-deltaic formations in nearly every craton in South America and West Africa. The available Paleomagnetic data also indicate that between 2.1-1.5 Ga, coeval rocks in West Africa and South America recorded similar polar wander paths. If South America and West Africa remained coherent from their amalgamation at 2.1-2.0 Ga until their incorporation into Gondwana at 0.6-0.5 Ga, the positions of South America and West Africa in the present configurations models of Rodinia need to be re-evaluated, since these configurations did not bring the two blocks into close proximity.
Persistent Identifierhttp://hdl.handle.net/10722/72863
ISSN
2015 Impact Factor: 8.743
2015 SCImago Journal Rankings: 4.949
References

 

DC FieldValueLanguage
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorWilde, SAen_HK
dc.date.accessioned2010-09-06T06:45:49Z-
dc.date.available2010-09-06T06:45:49Z-
dc.date.issued2002en_HK
dc.identifier.citationGondwana Research, 2002, v. 5 n. 3, p. 591-596en_HK
dc.identifier.issn1342-937Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/72863-
dc.description.abstractThe 2.1-2.0 Ga Transamazonian orogen in South America can be well correlated with the 2.1-2.0 Ga Eburnean orogen along the western margin of West Africa. Both the orogens are characterized by early tangential tectonics, marked by large-scale thrusts and sinistral strike-slip faults, followed by later transcurrent tectonics, marked by dextral shear zones. Metamorphic evolution of the two orogens involved an initial phase of crustal thrusting and thickening, followed by exhumation and final cooling. These suggest that South America and West Africa may have been jointed along the Transamazonian-Eburnean orogen at 2.1-2.0 Ga. This is supported by the presence of ∼2.0 Ga fluvio-deltaic formations in nearly every craton in South America and West Africa. The available Paleomagnetic data also indicate that between 2.1-1.5 Ga, coeval rocks in West Africa and South America recorded similar polar wander paths. If South America and West Africa remained coherent from their amalgamation at 2.1-2.0 Ga until their incorporation into Gondwana at 0.6-0.5 Ga, the positions of South America and West Africa in the present configurations models of Rodinia need to be re-evaluated, since these configurations did not bring the two blocks into close proximity.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jcren_HK
dc.relation.ispartofGondwana Researchen_HK
dc.subjectCollisional orogenyen_HK
dc.subjectGondwanaen_HK
dc.subjectRodiniaen_HK
dc.subjectSouth Americaen_HK
dc.subjectWest Africaen_HK
dc.titleDid South America and West Africa Marry and Divorce or Was it a Long-lasting Relationship?en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1342-937X&volume=5&spage=591&epage=596&date=2002&atitle=Did+South+America+and+West+Africa+marry+and+divorce+or+was+it+a+long-lasting+relationship?en_HK
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0142124669en_HK
dc.identifier.hkuros71867en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0142124669&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume5en_HK
dc.identifier.issue3en_HK
dc.identifier.spage591en_HK
dc.identifier.epage596en_HK
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridWilde, SA=35254758600en_HK

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