Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Birimian crustal growth in the West African Craton: U-Pb, O and Lu-Hf isotope constraints from detrital zircon in major rivers
Swedish Museum of Natural History, Department of Geology. University of Western Australia.ORCID iD: 0000-0002-0533-1162
Swedish Museum of Natural History, Department of Geology. Lund University.
Show others and affiliations
2018 (English)In: Chemical Geology, ISSN 0009-2541, E-ISSN 1872-6836, no 479, p. 259-271Article in journal (Refereed) Published
Abstract [en]

Combined U-Pb, O and Lu-Hf isotope analyses of detrital zircon grains from five major rivers in Ghana are used to investigate the growth and evolution of the Birimian terrane of the West African Craton. The majority of the analysed zircon yields supra-chondritic εHf values, suggesting derivation from primarily juvenile host magmas. Zircon grains from the Birim River in southwestern Ghana deviate from the generally juvenile trend, where the sub-chondritic εHf but mantle-like δ18O of the 2.15 Ga population suggest reworking of ancient, but unweathered, meta-igneous crust. Hf-O isotope data from detrital zircons of the remaining rivers are consistent with sequential crust generation between ca. 2.2 and 2.1 Ga. Oxygen isotope data suggest that the contribution from Archaean sedimentary material to felsic magmas was below 30%, and in most cases below 10%. Zircon with strongly positive εHf values and elevated δ18O indicate rapid reworking of juvenile crust within southern Ghana. An increase towards heavier oxygen isotope signatures over time suggests a maturing arc system with rapid recycling of juvenile supracrustal material during the evolution of the Birimian terrane.

Place, publisher, year, edition, pages
2018. no 479, p. 259-271
Keywords [en]
West African Craton Baoulé Mossi Detrital zircon U-Pb Lu-Hf Oxygen
National Category
Geochemistry
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-3210DOI: 10.1016/j.chemgeo.2018.01.021OAI: oai:DiVA.org:nrm-3210DiVA, id: diva2:1273843
Funder
Swedish Research Council, VR#2012-4531 to A. Scherstén and VR#2016- 00261 to A. PeterssonAvailable from: 2018-12-22 Created: 2018-12-22 Last updated: 2019-01-14Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full texthttps://doi.org/10.1016/j.chemgeo.2018.01.021

Search in DiVA

By author/editor
Petersson, AndreasWhitehouse, Martin
By organisation
Department of Geology
In the same journal
Chemical Geology
Geochemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 13 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf