Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria

Hitherto unknown metacarbonate deposits constitute parts of the Cretaceous Mamfe embayment which straddles the border between south-eastern Nigeria and western Cameroon. The rock is characterisedby a high concentration of LOI, CaO and MgO and depleted content of various insoluble components. Assumin...

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Autores:
Ephraim, Bassey Edem
Tipo de recurso:
Article of journal
Fecha de publicación:
2012
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/72214
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/72214
http://bdigital.unal.edu.co/36687/
http://bdigital.unal.edu.co/36687/2/
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openAccess
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Atribución-NoComercial 4.0 Internacional
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spelling Atribución-NoComercial 4.0 InternacionalDerechos reservados - Universidad Nacional de Colombiahttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Ephraim, Bassey Edem37430d22-5292-4bd6-915c-9b8338f2e5993002019-07-03T14:59:49Z2019-07-03T14:59:49Z2012https://repositorio.unal.edu.co/handle/unal/72214http://bdigital.unal.edu.co/36687/http://bdigital.unal.edu.co/36687/2/Hitherto unknown metacarbonate deposits constitute parts of the Cretaceous Mamfe embayment which straddles the border between south-eastern Nigeria and western Cameroon. The rock is characterisedby a high concentration of LOI, CaO and MgO and depleted content of various insoluble components. Assuming all the CaO and MgO content of the rock were related to calcite and dolomitephases, these two minerals would account for around 22.5 wt% and 76.3 wt% on average, respectively. Among the trace elements investigated, only Ba, Cs, Rb, Sr, Nb, Pb, Zr, Cd, Cu, Ni, U, Y andZn display concentrations beyond their detection limits. Chondrite normalised rare earth element patterns show that the rock under investigation show moderate to strong fractionation of light rareearth elements (LREEN) over heavy rare earth elements (HREEN) and distinct negative Eu anomaly. Multivariate statistical treatment and variation plots revealed several geochemical interrelationships,among which are the SiO2 - Al2O3 - K2O - TiO2 -Fe2O3 - Ba - Nb - Rb - Zr links which is associated with the rock's silicate fraction. The carbonate fraction comprises CaO, MgO, Sr, Pb and Cu. Theoverall geochemical signatures support development of the metacarbonate deposit from sedimentary carbonate materials that was deposited in a saline, shallow-marine, low-energy seawater environment.The consistency of the rock's chemical properties can be attributed to the relative stability experienced during the parent sedimentary materials' deposition.application/pdfspaUNIVERSIDAD NACIONAL DE COLOMBIAhttp://revistas.unal.edu.co/index.php/esrj/article/view/37617Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research JournalEarth Sciences Research JournalEarth Sciences Research Journal; Vol. 16, núm. 2 (2012) Earth Sciences Research Journal; Vol. 16, núm. 2 (2012) 2339-3459 1794-6190Ephraim, Bassey Edem (2012) Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria. Earth Sciences Research Journal; Vol. 16, núm. 2 (2012) Earth Sciences Research Journal; Vol. 16, núm. 2 (2012) 2339-3459 1794-6190 .Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeriaArtículo de revistainfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501http://purl.org/coar/resource_type/c_2df8fbb1http://purl.org/coar/version/c_970fb48d4fbd8a85Texthttp://purl.org/redcol/resource_type/ARTORIGINAL37617-166687-1-PB.pdfapplication/pdf1219029https://repositorio.unal.edu.co/bitstream/unal/72214/1/37617-166687-1-PB.pdf7a516c64a38f3f972379a260f6994051MD51THUMBNAIL37617-166687-1-PB.pdf.jpg37617-166687-1-PB.pdf.jpgGenerated Thumbnailimage/jpeg7747https://repositorio.unal.edu.co/bitstream/unal/72214/2/37617-166687-1-PB.pdf.jpgbe51b9bfe57d2db73f71c2edb7075dd4MD52unal/72214oai:repositorio.unal.edu.co:unal/722142024-06-14 23:10:21.976Repositorio Institucional Universidad Nacional de Colombiarepositorio_nal@unal.edu.co
dc.title.spa.fl_str_mv Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
title Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
spellingShingle Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
title_short Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
title_full Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
title_fullStr Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
title_full_unstemmed Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
title_sort Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria
dc.creator.fl_str_mv Ephraim, Bassey Edem
dc.contributor.author.spa.fl_str_mv Ephraim, Bassey Edem
description Hitherto unknown metacarbonate deposits constitute parts of the Cretaceous Mamfe embayment which straddles the border between south-eastern Nigeria and western Cameroon. The rock is characterisedby a high concentration of LOI, CaO and MgO and depleted content of various insoluble components. Assuming all the CaO and MgO content of the rock were related to calcite and dolomitephases, these two minerals would account for around 22.5 wt% and 76.3 wt% on average, respectively. Among the trace elements investigated, only Ba, Cs, Rb, Sr, Nb, Pb, Zr, Cd, Cu, Ni, U, Y andZn display concentrations beyond their detection limits. Chondrite normalised rare earth element patterns show that the rock under investigation show moderate to strong fractionation of light rareearth elements (LREEN) over heavy rare earth elements (HREEN) and distinct negative Eu anomaly. Multivariate statistical treatment and variation plots revealed several geochemical interrelationships,among which are the SiO2 - Al2O3 - K2O - TiO2 -Fe2O3 - Ba - Nb - Rb - Zr links which is associated with the rock's silicate fraction. The carbonate fraction comprises CaO, MgO, Sr, Pb and Cu. Theoverall geochemical signatures support development of the metacarbonate deposit from sedimentary carbonate materials that was deposited in a saline, shallow-marine, low-energy seawater environment.The consistency of the rock's chemical properties can be attributed to the relative stability experienced during the parent sedimentary materials' deposition.
publishDate 2012
dc.date.issued.spa.fl_str_mv 2012
dc.date.accessioned.spa.fl_str_mv 2019-07-03T14:59:49Z
dc.date.available.spa.fl_str_mv 2019-07-03T14:59:49Z
dc.type.spa.fl_str_mv Artículo de revista
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url https://repositorio.unal.edu.co/handle/unal/72214
http://bdigital.unal.edu.co/36687/
http://bdigital.unal.edu.co/36687/2/
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dc.relation.spa.fl_str_mv http://revistas.unal.edu.co/index.php/esrj/article/view/37617
dc.relation.ispartof.spa.fl_str_mv Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal
Earth Sciences Research Journal
dc.relation.ispartofseries.none.fl_str_mv Earth Sciences Research Journal; Vol. 16, núm. 2 (2012) Earth Sciences Research Journal; Vol. 16, núm. 2 (2012) 2339-3459 1794-6190
dc.relation.references.spa.fl_str_mv Ephraim, Bassey Edem (2012) Investigation of the geochemical signatures and conditions of formation of metacarbonate rocks occurring within the mamfe embayment of south-eastern nigeria. Earth Sciences Research Journal; Vol. 16, núm. 2 (2012) Earth Sciences Research Journal; Vol. 16, núm. 2 (2012) 2339-3459 1794-6190 .
dc.rights.spa.fl_str_mv Derechos reservados - Universidad Nacional de Colombia
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dc.rights.license.spa.fl_str_mv Atribución-NoComercial 4.0 Internacional
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rights_invalid_str_mv Atribución-NoComercial 4.0 Internacional
Derechos reservados - Universidad Nacional de Colombia
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