Tin content of biotites from the Afu Younger Granite complex, central Nigeria

Imeokparia, E.G.

doi:10.2113/gsecongeo.77.7.1710

Cited by 15 publications

(12 citation statements)

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“…These values are intermediate between those obtained by Imeokparia (1982) in tinbearing and tin-barren Jurassic Nigerian granites. Accessory ilmenite is ubiquitous in the Conway, but magnetite also is present locally, suggesting that the Conway is not strictly an ilmenite-series granite (Ishihara, 1982) of the type characteristic of CircumPacific tin districts.…”

Section: Resources Of the Mesozoic White Mountain Intrusive-volcanic contrasting

confidence: 84%

“…Some 35 years ago, Read (1948, p. 8) observed: "so noteworthy is the identity of the Nigerian and New (Bowden, 1982;Bowden and Kinnaird, 1978;Bowden and others, 1981;Olade, 1980;Imeokparia, 1982). The major difference is the age of the basement metamorphic-plutonic terrane, which is Precambrian in Nigeria and Paleozoic in New Hampshire.…”

Section: Resources Of the Mesozoic White Mountain Intrusive-volcanic mentioning

confidence: 99%

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Mineral resource potential map of the wilderness and roadless areas of the White Mountain National Forest, Coos, Grafton, and Carroll counties, New Hampshire

Moench¹,

Gazdik²,

Canney³

1984

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Section: Resources Of the Mesozoic White Mountain Intrusive-volcanic contrasting

confidence: 84%

Section: Resources Of the Mesozoic White Mountain Intrusive-volcanic mentioning

confidence: 99%

Mineral resource potential map of the wilderness and roadless areas of the White Mountain National Forest, Coos, Grafton, and Carroll counties, New Hampshire

Moench¹,

Gazdik²,

Canney³

1984

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“…It has also been reported (Imeokparia, 1982) that biotites from stanniferous granites of the Amo Younger Granite in Nigeria contain anomalous levels of Sn however those phases of the eastern Meguma Terrane granites reported here that have the highest Sn concentrations are often depleted in biotite.…”

Section: Variationssupporting

confidence: 71%

Application of Airborne Gamma Ray Spectrometric Surveys Meguma Terrane, Nova Scotia

Ford

Carson

1986

atgeol

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Between 1976 and 1983 a series of airborne gamma-ray spectrometric surveys with flight lines spaced at one kilometre intervals were carried out in the Province of Nova Scotia. These surveys covered most of the Meguma Terrane and have yielded radioelement distribution patterns that have proven useful in delineating various aspects of the region's geology. Within a cogenetic suite of Devonian-Carboniferous p e r a l u m i n o u s g r a n i t i c rocks u r a n i u m concentrations are shown to increase progressively with increasing differentiation while thorium concentrations reflect two contrasting trends. The most prevalent trend, shown by the granitic rocks of the eastern part of the South Mountain Batholith (New Ross area) and Eastern Meguma Terrane, is one of decreasing thorium concentrations with increasing differentiation.A second, Follow-up investigations of these airborne gamma-ray spectrometric surveys have confirmed the relationships between uranium and thorium. Limited lithogeochemical sampling has shown that those phases of the granitic suite which exhibit a high eU/eTh ratio also exhibit increased levels of other lithophile elements, Sn and Be and occasionally Li and F.

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“…As in the other Younger Granite complexes, with the exception of SiO 2 the variation in major elements between the two granitic types is largely a function of the change in the proportion and composition of biotite and the composition of plagioclase (Jacobson, Macleod & Black, 1958;Bowden & Turner, 1974;Imeokparia, 1982;Imeokparia, in press). …”

Section: Geochemical Characteristics Of the Granites 5a Major Elementsmentioning

confidence: 96%

Geochemical evolution of the Jarawa Younger Granite complex and its related mineralization, northern Nigeria

Imeokparia

1985

Geol. Mag.

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The Jarawa Younger Granite complex is composed of high silica alkali granites that were emplaced 161 Ma ago. The granites are characterized by high contents of Rb, Li, F, Sn, Nb, W above normal low-Ca granitic rocks and have typical S-type characteristics that are indicative of a substantial component of crustal melt.Mineralization in the complex is associated with the biotite granite which was emplaced as a sheet-like body at relatively shallow depth and occurs as disseminations and as greisen lodes and veins.Chemical studies of the granites have shown that the biotite granite represents a highly fractionated rock that crystallized from a residual magma from which the hornblende-biotite granite had previously crystallized. However the biotite granite is characterized by steep gradients in some minor and trace elements that apparently indicate that liquid-state differentiation and/or volatile complexing processes made significant contributions to their differentiation. Enrichment of Th, Li, Rb, Sn, W and Nb may be more closely linked to roofward migration of F.

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Tin content of biotites from the Afu Younger Granite complex, central Nigeria

Cited by 15 publications

References 0 publications

Mineral resource potential map of the wilderness and roadless areas of the White Mountain National Forest, Coos, Grafton, and Carroll counties, New Hampshire

Mineral resource potential map of the wilderness and roadless areas of the White Mountain National Forest, Coos, Grafton, and Carroll counties, New Hampshire

Application of Airborne Gamma Ray Spectrometric Surveys Meguma Terrane, Nova Scotia

Geochemical evolution of the Jarawa Younger Granite complex and its related mineralization, northern Nigeria

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