Lake Superior-type banded iron formations were chemically precipitated on marine continental shelves and in shallow basins. They are commonly interlayered with other sedimentary or volcanic rocks such as shale and tuff. Most Lake Superior-type banded iron formations formed during the Paleoproterozoic, between 2.5 and 1.8 billion years ago.
Other articles where Lake Superior-type banded-iron formation deposit is discussed: mineral deposit: Iron deposits: .Lake Superior and are called Lake Superior-type deposits. Their individual sediment layers can be as thin as 0.5 millimetre (0.02 inch) or as thick as 2.5 centimetres (1 inch), but the alternation of a siliceous band and an iron mineral band is invariable.
By far the most important type of banded iron formations formed during the Paleoproterozoic (Superior-type, named after lake Superior). They formed on stable continental shelves. Superior-type deposits are large in dimensions (more than 100 meters in thickness and over 100 km in lateral extent).
Taconite, a low-grade siliceous iron ore composed of 20–30 percent magnetite occurring in fine-grained banded iron formations. Taconite is mined primarily in the U.S., in the Mesabi Iron Range in Minnesota and the Marquette Iron Range in Michigan.
Jul 01, 2016· Lake Superior-type banded iron formations (Gross, 1980, Gross, 1993) are developed in passive-margin Proterozoic sedimentary rock successions. These contain some of the largest known BIF-hosted iron accumulations, including the Hamersley ( Thorne et al., 2008a, Angerer et al., 2014a ) and the Transvaal iron deposits in Australia and South ...
Banded iron formations have greater than 15 % iron content and represent the principal sources of iron throughout the world and are mined in the Great Lakes region of the United States. The Lake Superior-type BIF are associated with typical shelf-type sedimentary rocks with minimal volcanic input and most formed during the Paleoproterozoic era.
Lake Superior-type banded iron formations were chemically precipitated on marine continental shelves and in shallow basins. They are commonly interlayered with other sedimentary or volcanic rocks such as shale and tuff. Most Lake Superior-type banded iron formations formed during the Paleoproterozoic, between 2.5 and 1.8 billion years ago.
Lake Superior Type Banded Iron Formations as an Analog to Mars: Authors: Fallacaro, A.; Calvin, W. M. ... The Lake Superior type BIF deposits in the upper peninsula of Michigan are not associated with extrusive volcanic materials and are therefore interpreted as chemical precipitates of iron-rich waters in a shallow sea (James, 1954). ...
Archean Earth Banded Iron Formation (BIF) has been suggested as a possible terrestrial analog for Early Mars (Calvin, 1998). Two types of BIF in the United States and Canada have been differentiated based on their respective origins. The Algoma type deposits in Ontario, Canada are in close proximity to ancient volcanic centers suggesting a sub-aqueous hydrothermal origin similar to modern day ...
The Lake Superior Agate. Photo by Lech Darski. The Lake Superior agate is a type of agate stained by iron and found on the shores of Lake Superior. Its wide distribution and iron-rich bands of color reflect the gemstone's geologic history in Minnesota, Wisconsin, and Michigan. In 1969 the Lake Superior agate was designated by the Minnesota ...
The most positive δ53Cr values occur in the open-shelf, Lake Superior type BIF, especially those of Ediacaran age. ... tion of Rapitan type banded iron formation (BIF) during glacial retreat ...
Age distributions of Rapitan/Clinton iron-formations, Algoma and Superior type banded iron-formations, volcanogenic massive sulphide deposits, vein-type Au–U deposits, and quartz-pebble conglomerate-type Au–U deposits. Data from Meyer (1985), Kimberley (1989), Barley and Groves (1992), and Ohmoto (1996a).
Mineral deposit - Mineral deposit - Iron deposits: By far the most important metal from an economic and technical point of view is iron. Sedimentary iron deposits, from which almost all iron is obtained, can therefore be viewed as one of the world's great mineral treasures. There are two major types of deposit. The first, and by far the most important, is banded iron formations (BIFs), so ...
Banded-iron formation (BIF), chemically precipitated sediment, typically thin bedded or laminated, consisting of 15 percent or more iron of sedimentary origin and layers of chert, chalcedony, jasper, or quartz.Such formations occur on all the continents and usually are older than 1.7 billion years. They also are highly metamorphosed.
The Lake Superior-type Cauê banded-iron Formation lies on Caraça metasediments. The Cauê Formation is a carbonate sequence of the Gandarela Formation. Lying locally unconformably on the Gandarela Formation, the Piracicaba Group comprises a thick pile of shallow-water and deltaic strata.
The Lake Superior-type Cauê banded-iron Formation lies on Caraça metasediments. The Cauê Formation is a carbonate sequence of the Gandarela Formation. Lying locally unconformably on the Gandarela Formation, the Piracicaba Group comprises a thick pile of shallow-water and deltaic strata.
Iron-ore mining methods vary by the type of ore being mined. Brief History of High-Grade Iron Ore Mining in North. Philip E. Brown, 2008. "Brief History of High-Grade Iron Ore Mining in North America (1848–2008)", Banded Iron Formation-Related High-Grade Iron Ore, Steffen Hagemann, Carlos Alberto Rosière, Jens Gutzmer, Nicolas J. Beukes
Lake Superior-type banded iron formation is a distinctive sedimentary rock with very laterally continuous layers of iron minerals alternating with silica (chert) deposits. Probably deposited on a shallow stable continental shelf within a narrow time range of precipitation (2.7-1.8 billion years ago).
The Lake Superior agate is a type of agate stained by iron and found on the shores of Lake Superior. Its wide distribution and iron-rich bands of color reflect the gemstone's geologic history in Minnesota, Wisconsin, Nebraska, Iowa, Kansas and Michigan. In 1969 the Lake Superior agate was designated by the Minnesota Legislature as the official ...
The iron- formation in the Yavapai Series of central Arizona was metamorphosed between 1,820 and 1,760 m.y. ago and may be coeval with those of the Lake Superior region. The iron-formation in the lower part of the Damara Super-group of South West Africa .
Lake Superior-type banded iron formations were chemically precipitated on marine continental shelves and in shallow basins. They are commonly interlayered with other sedimentary or volcanic rocks such as shale and tuff . Most Lake Superior-type banded iron formations formed during the Paleoproterozoic, between 2.5 and 1.8 billion years ago.
The Gunflint chert (1.88 Ga) is a sequence of banded iron formation rocks that are exposed in the Gunflint Range of northern Minnesota and northwestern Ontario along the north shore of Lake Superior.The Gunflint Chert is of paleontological significance, as it contains evidence of microbial life from the Paleoproterozoic. The Gunflint Chert is composed of biogenic stromatolites.
Mar 01, 2014· These BIFs belong to the Superior-type, and are represented by Dalizi iron deposit in Jilin province, Tianhu iron deposit in Xinjiang Uighur Autonomous Region and Fengshanying iron deposit in Sichuan province. (4) Xinyu-type: Neoproterozoic banded iron formations (BIFs) with magnetite as the ore mineral (20% ≤ TFe < 50%).
The iron formation on the Block 103 property is iron formation of the Lake Superior-type. "Lake Superior-type iron formation consists of banded sedimentary rocks composed principally of bands of iron oxides, magnetite and hematite within quartz (chert)-rich rock with variable amounts of silicate, carbonate and sulphide lithofacies.
