Geochemistry of calc-alkaline volcanics in northwestern Nigeria, and a possible Pan-African suture zone

Details Geochemistry of calc-alkaline volcanics in northwestern Nigeria, and a possible Pan-African suture zone Geochemistry of calc-alkaline volcanics in northwestern Nigeria, and a possible Pan-African suture zone

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..37...90m&link_type=abstract

Earth and Planetary Science Letters, Volume 37, Issue 1, p. 90-96.

Computer Science

3

Scientific paper

Major and trace element characteristics of dacites and rhyolites overlying and intruding basement rocks in northwestern Nigeria most closely resemble those of intracontinental orogenic volcanic associations. REE patterns point to a deep-seated source for the magmas, perhaps involving garnet fractionation at mantle depths and low-pressure plagioclase fractionation. The occurrence of calc-alkaline volcanics, small basic-ultrabasic complexes and major transcurrent faulting, is consistent with the presence of a Pan-African suture zone in northwestern Nigeria.

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