iron formation

iron formation

[′ī·ərn fȯr′mā·shən]
(geology)
Sedimentary, low-grade iron ore bodies consisting mainly of chert or fine-grained quartz and ferric oxide segregated in bands or sheets irregularly mingled.
References in periodicals archive ?
The properties comprise three project areas: Hopes Advance, Morgan Lake and Roberts Lake, which cover over 300 kilometres of iron formation and are located within 20 - 50 km of tidewater.
5 kilometre part of a 14 kilometre strike body at Malelane, the drilling will be conducted on the location's southern banded iron formation.
Washington, Jan 16 ( ANI ): Researchers have managed for the first time to determine the isotope composition of the rare trace elements Hafnium and Neodymium in 2,700 million year-old seawater by using high purity chemical sediments from Temagami Banded Iron Formation (Canada) as an archive.
The total Mineral Resources inventory for Royal's Braemar Iron Formation Prospects now stands at 2,493 Million Tonnes at 21.
The supracrustal (greenstone) belts are lithologically diverse and include basalt, greywacke, pelite, and iron formation, along with lesser andesite, dacite, rhyolite, ultramafic rocks, conglomerate, and carbonate rocks.
The mine features higher grade lump and fines ores from the Marra Mamba iron formation.
View to east from 19 31'44"N / 14 00'51"W showing a series of ridges with massive banded iron formation (BIF) forming the resistant dip-slope capping.
The style and occurrence of the gold mineralization is very similar to the Homestake Mine and many geologists have, in fact, suggested that the host iron formation in the Rochford District and in the Homestake Mine are likely the same.
The main focus of the Peak Hill Iron project is magnetite and hematite goethite deposits hosted in the Robinson Range Iron Formation; a sequence of interbedded BIF, granular iron formation (GIF), siltstone and shale.
Pictured is Dales Gorge, part of the Brockman Iron Formation in Western Australia.
Jan Peter in his chapter "Ancient iron formations: their genesis and use in the exploration for stratiform base metal sulphide deposits, with examples from the Bathurst Mining Camp" reviews the chemistry and mineralogy of Algoma type iron formations--that is iron formations of restricted lateral extent that can be directly attributed to seafloor hydrothermal activity as opposed to the laterally extensive Superior type iron formation attributable to more global evolutionary events.
In 1992 gold was first discovered in an iron formation on BIF Island by J.