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Sedimentary Iron Deposits, Evaporites and Phosphorites ,

Iron formations, evaporites, and phosphorites are economically important chemical sedimentary rocks developed in basins which span a very large fraction of geologic time Since they are chemical precipitates, they must reflect the character of the body of water from which they were formed...

SEDIMENTARY AND DIAGENETIc MINERAL DEPOSITS A ,

Volume 5 of Reviews in Economic Geology-Sedimentary and Diagenetic Mineral Deposits A Basin Analysis Approach to Exploration-served as a text for an SEG short course held in Toronto, Ontario, in May, 1991 Unlike its predecessors, Volume 5 actually appeared, in final form, in time for the short course it supported This precedent-setting occur 173...

Manganese Ore Deposits

The Paleoproterozoic peak is by far the largest and corresponds in time to the major episode of Banded Iron Formation deposition Iron formation is also a common companion for the Neoproterozoic Mn deposits, but the Cenozoic peak, largely confined to the Oligocene, has no associated Fe mineralization...

Sedimentary ore deposit environments

Others have passed through an intermediate organic stage The rocks, however, constitute an adequate source for most of the sedimentary iron, manganese, and copper The iron comes from the weathering of iron-bearing minerals of igneous rocks such as hornblende, pyroxene, or mica, from the iron-bearing minerals of sedimentary and metamorphic ....

Formation of Sedex and Sediment

Sedimentary exhalative deposits sedex deposits are ore deposits believed to have been formed by the release of ore-bearing hydrothermal fluids into a submarine sedimentary environments The resulting ore deposits are an important source of lead and zinc...

Why are metallic minerals generally found in igneous and ,

Banded Iron Formations, for instance, are chemical sedimentary rocks that contain a high percentage of all Iron produced worldwide Similarly, the biggest gold deposit in the world, responsible for 40 to 50 of all the gold ever mined on Earth on the Witwatersrand Basin is within sedimentary formations...

Ore Deposits Formed by Sedimentation

Of this, only 00001 is concentrated in commercial deposits Iron in sedimentary rocks comes from the iron bearing minerals of igneous rocks such as hornblende, pyroxene and mica, from the iron-bearing minerals of sedimentary and metamorphic rocks, and from the red coloring matter of sedimentary rocks...

Geology Exam 2 Flashcards Quizlet

Geology Exam 2 STUDY PLAY , Much of the world s iron ore deposits come from rock known as Banded iron formation Sediment becomes sedimentary rock by the process known as blank which involves the blank of grains, loss of water, and blank whereby material is precipitated in pore spaces and binds grains together...

Sedimentary Rock Types and How They Are Formed?

These types of sedimentary rocks usually occur in arid areas like gypsum and salt deposits Examples of chemical sedimentary rocks are chert, dolomites, flint, rock salt, iron ore and some types of limestone 2 Clastic...

Types and geological characteristics of iron deposits in ,

Sedimentary iron deposits Sedimentary iron deposits can be divided into continental and marine type The marine sedimentary iron deposits are widespread in China and distributed in the Zhangjiakou area in Hebei Province, southern China, and the Qinling Mountains in Shaanxi Province Li et al, 2012a, Zhang et al, 2014b 351...

Sedimentary Iron Deposit by Rande Sumagang on Prezi

Sedimentary Iron Deposit By Group 2 Iron Minerals Iron Oxides Hematite Geothite Limonite Magnetite Iron Carbonates Siderite Ankerite Ferroan Dolomite Fe occurs in two valence states Fe2 divalent Fe3 trivalent Sedimentary Fe deposits Banded Iron Formation Pre-Cambrian...

SEDEX Sedimentary Exhalative Ore Deposits

To form SEDEX deposits, you require the deep sedimentary basins so distribution is more limited than that of VMS deposits, however they are still found on all continents and there are about 125 SEDEX deposits on note, and these are marked in red on the map...

Geology Final Flashcards Quizlet

Start studying Geology Final Learn vocabulary, terms, and more with flashcards, games, and other study tools Search , Sedimentary iron ores that are layered are called A Banded hematite quartzite , B Sedimentary mineral deposits A rock from which is a useful or metal can be extracted is referred to as a an...

geology sedimentary iron ore deposits

Iron Ore is a chemical sedimentary rock that forms when iron and oxygen and sometimes other substances combine in solution and deposit as a sediment Hematite shown above is the most common sedimentary iron ore mineral...

Locations of Deposits

Other deposits include hematite-breccia complex deposits, magmatic-hydrothermal uranium in iron-oxide Cu-Au deposits and quartz-pebble conglomerate deposits World Nuclear, 2010 Thorium is mined in conjunction with uranium, so much that estimates of reserves for these elements are made based off of uranium content...

Iron Ore Sedimentary Rock

Earth s most important iron ore deposits are found in sedimentary rocks They formed from chemical reactions that combined iron and oxygen in marine and fresh waters They formed from chemical reactions that combined iron and oxygen in marine and fresh waters...

Deposits related to chemical sedimentation Sedimentary ,

Sedimentary ores Ore components localized by processes of sedimentation or diagenesis High tonnage, medium to high grade Sedimentary iron deposits Banded Iron Formation BIF Oolitic ferruginous deposits eg Clinton ores, USA Minnette...

Sedimentary Iron Deposits, Evaporites and Phosphorites ,

Sedimentary Iron Deposits, Evaporites and Phosphorites 263 There are several alternative and, for the moment, equally acceptable ways of explaining the formation of alternating iron-rich and iron-poor microbands in iron formation There is a strong possibility that the ,...

Sٍedimentary manganes and iron ore deposits

EGYPTIAN IRON ORE DEPOSITS In Egypt economic iron ore deposits occur in two natures i Iron ore deposit of sedimentary nature Sedimentary iron ore deposit is a very limited occurrence, being found only in the 2 localities in the Western Desert and one locality in Sinai and ii The Precambrian Banded Iron ore deposits BIFs BIFs have being ....

Sedimentary Deposits Article about Sedimentary Deposits ,

Sedimentary Deposits mineral deposits formed during the accumulation of sediment on the bottom of rivers and other bodies of water According to their place of formation they are divided into river, swamp, lake, sea, and ocean deposits Among ocean deposits a distinction is made between platform and geo-synclinal deposits Depending on the type of ....

sedimentary iron deposits

Sedimentary Mineral Deposits - Mineral Processing , Mechanical Deposition of Sedimentary Mineral Deposits In some , it would form a bed of iron ore Placer deposits of gold , If it is a sedimentary deposit,...

Mineral Commodities of

Iron Ore 3 Mineral Commodities of Newfoundland and Labrador Figure 2Geological map of the Labrador Trough, showing the locations of major iron deposits and occurrenc Iron-ore deposits in the Labrador Trough are hosted in the Sokoman Formation, which sits toward the top of the , metamorphosed sedimentary iron formations 15 to 30 Fe ....

PDF Sedimentary Manganese and Iron Ore Deposits

separately as sedimentary manganese deposits relatively free from iron Iron oxides precipitate at a lower pH than manganese oxides thus iron and manganese may be separated but often are not ....

Sedimentary Exhalative Deposits Investing News Network

SedEx, or sedimentary exhalative deposits, are ore deposits formed when hydrothermal fluids enter a water reservoir, such as an ocean, and precipitate minerals...

Sedimentary Exhalative Deposits

SedEx, or sedimentary exhalative deposits, are ore deposits formed when hydrothermal fluids enter a water reservoir, such as an ocean, and precipitate minerals SedEx deposits are a major source ....

Iron Formations Iron Ore Sedimentary Rock

Iron ore deposits Iron ore deposits are known to occur in sedimentary, hydrothermal and magmatic environments, but production today is almost entirely from three types of deposits deposits related to Precambrian banded iron-formations provide about 90 of all iron ore mined, the remaining is derived from metasomatic skarn and magmatic ....

Sedimentary exhalative origin for magnetite deposits of ,

Two temporally distinct genetic models have been proposed for magnetite 1 a pre-Ottawan, sedimentary exhalative model in which ores were deposited on the seafloor as precipitates from iron-enriched hydrothermal fluids 2 a late-Ottawan, fluid alteration model in which the current mineral composition of ores was derived from Fe-rich ....

Sedimentary exhalative origin for magnetite deposits of ,

The New Jersey Highlands and contiguous Hudson New York Highlands host hundreds of small, worked-out magnetite mines, and the major zinc-oxide deposits of Franklin and Sterling Hill...

Morphology of ore deposits and their relations with host rocks

Morphology and Relationship with Host Rocks Mode of occurrence of an ore deposit is important from the mining point of view Sedimentary ore deposits are roughly tabular, most others occur in a variety of forms...

Geological ore deposits

Sedimentary iron ore and manganese deposits Most of the world s iron and manganese are derived from deposits of this type These deposits are very large in size thousands of millions of tons and are usually mined by open-cut methods...