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Chemostratigraphy Of Neoproterozoic Banded Iron Formation, The most positive 53cr values occur in the openshelf lake superior type bif especially those of ediacaran age tion of rapitan type banded iron formation bif during glacial retreat Lake Superior Type Banded Iron Formation
Lake superiortype iron formation iron formations which formed during middle precambrian time about 2000 million years ago and were first described in the lake superior region the type is characterized by interlayers bands of iron minerals and chert quartz
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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 ironrich waters in a shallow sea james 1954
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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 ironrich bands of color reflect the gemstones geologic history in minnesota wisconsin and michigan in 1969 the lake superior agate was designated by the minnesota
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The iron formation in the yavapai series of central arizona was metamorphosed between 1820 and 1760 my ago and may be coeval with those of the lake superior region the ironformation in the lower part of the damara supergroup of south west africa
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Rock type sedimentary rock chemical sediment iron formation rock unit name ironwood formation rock description oxidation and leaching of unaltered bandediron formation to soft ironoxide ore bodies lake superior iron ore association 1952 has production figures for individual mines and leases
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Lake superiortype 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 superiortype banded iron formations formed during the paleoproterozoic between 25 and 18 billion years ago
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Lake superiortype 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 2718 billion years ago
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Spectral and geochemical characteristics of lake superior type banded iron formation analog to the martian hematite outcrops alicia fallacaro1 and wendy m calvin1 1university of nevada reno introduction the thermal emission spectrome ter tes onboard mars global surveyor discovered
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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 subaqueous hydrothermal origin similar to modern day
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Lake superior type lst banded iron formation bif was investigated as a spectral and possible process analog to these deposits in northern michigan lst bif formed in a sedimentary continental shelf or shallow basin environment under stable tectonic conditions and the oxide facies contains gray crystalline hematite
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Other articles where hamersley basin is discussed mineral deposit iron deposits australia studied deposits in the hamersley basin and found that individual thin layers could be traced for more than 100 kilometres such continuity suggests that evaporation played a major role in precipitating both the iron minerals and the silica a second remarkable feature of lake superiortype
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Deposit type banded ironrich sedimentary deposits development status past producer deposit model 241 superior fe bc name is lake superior rapitan types ironformation
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Banded iron formations bif are the protolith to most of the worlds largest iron ore deposits previous hypogene genetic models for paleoproterozoic lake superior bifhosted deposits invoke
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Other articles where algomatype bandediron formation deposit is discussed mineral deposit iron deposits of bif known as an algoma type formed over a much wider time range than the lake superior type from 38 billion to a few hundred million years ago algomatype bifs are also finely layered intercalations of silica and an iron mineral generally hematite or magnetite but the
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Of lake superior iron currently the only source of domestic iron ore in recent years lake superior ores provided an iron range is an elongate belt of layered sedimentary rocks in which one or more layers consist of banded ironformation a rock composed of alternating ironrich and ironpoor layers on a scale of a few centimeters banded
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The types of banded iron formation include algomatype lake superiortype superiortype and taconite depending upon banded iron formation texture it is divided into types here you will get to know about banded iron formation types interesting facts features of banded iron formation its monuments and fossils
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Lake superior type banded iron formations as an analog abstract 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 ironrich waters in a shallow sea james 1954 the thermal emission spectrometer tes discovery of
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Lake superior type lst banded iron formation bif was investigated as a spectral and possible process analog to these deposits in northern michigan lst bif formed in a sedimentary continental shelf or shallow basin environment under stable tectonic conditions and the oxide facies contains gray crystalline hematite
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Age distributions of rapitanclinton ironformations algoma and superior type banded ironformations volcanogenic massive sulphide deposits veintype auu deposits and quartzpebble conglomeratetype auu deposits data from meyer 1985 kimberley 1989 barley and groves 1992 and ohmoto 1996a
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Mar 01 2014 these bifs belong to the superiortype 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 xinyutype neoproterozoic banded iron formations bifs with magnetite as the ore mineral 20 tfe 50
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The most positive 53cr values occur in the openshelf lake superior type bif especially those of ediacaran age tion of rapitan type banded iron formation bif during glacial retreat
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Lake superiortype 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 superiortype banded iron formations formed during the paleoproterozoic between 25 and 18 billion years ago
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Banded iron formation is available in red reddish brown colors the streak of a rock is the color of powder produced when it is dragged across an unweathered surface the streak of banded iron formation is white get to know more about banded iron formation rock and characteristics of banded iron formation rock in the next sections
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The lake superiortype cau bandediron formation lies on caraa metasediments the cau formation is a carbonate sequence of the gandarela formation lying locally unconformably on the gandarela formation the piracicaba group comprises a thick pile of shallowwater and deltaic strata
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Lake superiortype 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 superiortype banded iron formations formed during the paleoproterozoic between 25 and 18 billion years ago
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Lake superiortype 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 superiortype banded iron formations formed during the paleoproterozoic between 25 and 18 billion years ago
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Deposition of giant iron formations as they are coeval with and genetically linked to time periods when large igneous provinces lips were emplaced superiortype iron formation first appeared at ca 26 ga when construction of large continents changed the heat flux at the coremantle boundary from ca 26 to ca 24 ga
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