banded iron formation


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banded iron formation

[¦band·əd ′ī·ərn fȯr‚mā·shən]
(geology)
A sedimentary mineral deposit consisting of alternate silica-rich (chert or quartz) and iron-rich layers formed 2.5-3.5 billion years ago; the major source of iron ore.
References in periodicals archive ?
"This is critical, as it is the first observation of a Precambrian-like banded iron formation that is Early Cambrian in age.
Gutzmer, "Deciphering formation processes of banded iron formations from the Transvaal and the Hamersley successions by combined Si and Fe isotope analysis using UV femtosecond laser ablation," Geochimica et Cosmochimica Acta, vol.
VTEM and magnetometer survey covering 1,700 line kilometres delineated numerous targets favourable for gold deposits associated with banded iron formations as well as targets that exhibit high potential for massive sulphide copper, zinc, gold and silver deposits.
The 61 banded iron formation macro-blades are manufactured by single-event core reduction with the cobbles sourced from the immediate area.
The Moussondji Est Licence and the Moussondji Ouest Licence both lie within the Chaillu Massif, a region within the ROC consisting of Archaean granite/gneiss and greenstone belts hosting a number of significant Banded Iron Formation ("BIF") deposits.
Improved Geological Modelling - Mapping of 2019 trenches and summer prospecting has exposed a regional-scaled, strongly folded sequence of mafic siltstones mudstones and banded iron formation. Syn-depositional breccias in these units are a preferential host for gold mineralization.
The total MRE of 767 million tonnes at 31.9% Fe comprises an Indicated and Inferred Hematite Resource component of 102 million tonnes at 40.6% Fe ("Hematite Resource") and an Indicated and Inferred Magnetite Resource component of 665 million tonnes of Fresh Magnetite Banded Iron Formation ("BIF") at 30.6% Fe ("Magnetite Resource").
The banded iron formation (BIF) at Fraser Bay can be traced over an exposed strike length of 5.5 kilometres, dips vertically to steeply west and has an apparent thickness ranging from 100 metres to more than 350 metres.
The banded iron formation (BIF) orebodies in this district have great vertical continuity and have been mined to depths of 2,500 m along a down dip length of up to 4,800 m.
Gold mineralisation at Lucky Strike is hosted within multiple north west trending Banded Iron Formation (BIF) units.
The results confirmed the geological model for Makengui whereby enriched oxide hematite caps overlay substantial fresh magnetite banded iron formation ("BIF").
Mitzic License - Iron Results: A regional reconnaissance work program on the Mitzic license targeting over 70 kilometers of magnetic highs has confirmed the widespread presence of a coarse grained, magnetite rich, Banded Iron Formation "BIF" averaging approximately 40% Fe.