Deep Crustal Origin for Oligoclase and Andesine Phenocrysts in Basalt from Gombe, Nigeria

Details Deep Crustal Origin for Oligoclase and Andesine Phenocrysts in Basalt from Gombe, Nigeria Deep Crustal Origin for Oligoclase and Andesine Phenocrysts in Basalt from Gombe, Nigeria

Apr 1968

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968natur.218..262w&link_type=abstract

Nature, Volume 218, Issue 5138, pp. 262-263 (1968).

Computer Science

3

Scientific paper

TWENTY-ONE miles east of Gombe in northern Nigeria, one of the numerous Tertiary-Quaternary olivine basalt plugs of the Benue trough alkaline volcanic province1 contains many conspicuous sub-rectangular white feldspar crystals, 1-3 cm long. The olivine basalt is a normal alkaline variety, quite fresh, with phenocryst and microphenocryst olivine (close to Fa25), titaniferous augite and titanomagnetite. Moderately zoned plagioclase microphenocrysts have labradoritic compositions (An54-62).

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