Phosphate rock mineralogy Sedimentary apatites. Most sedimentary deposits contain varieties of carbonate-fluorapatite that are grouped under the collective name francolite (McConnell, 1938). In establishing a series of systematic relationships between francolites, various authors (McClellan and …
phosphate rock sedimentation
Phosphate rock deposits can be sedimentary or igneous, but more than 80 percent of the world's current production of phosphate rock is mined from sedimentary deposits formed by deposition of phosphate-rich materials in marine environments. Large sedimentary deposits are located in China, the Middle East, northern Africa and the United States.
Other Phosphate Deposits. ... Although the United States is currently producing more phosphate rock than Morocco, Morocco's phosphate reserves are estimated to be nearly six times that of the United States. Looking toward the future, this puts Morocco in a very advantageous position to become the leading player in the mining of phosphate ...
_____ is the most common type of chemical sedimentary rock a. chert b. limestone c. phosphate rock d. quartz sandstone. b. limestone _____ is a form of calcium carbonate a. lignite b. chert c. travertine d. gypsum. c. travertine. Which one of the following is not a chemical sedimentary rock or evaporite?
Phosphorite, also called phosphate rock, rock with a high concentration of phosphates in nodular or compact masses. The phosphates may be derived from a variety of sources, including marine invertebrates that secrete shells of calcium phosphate, and the bones and excrement of vertebrates.
Phosphorite, phosphate rock or rock phosphate is a non-detrital sedimentary rock which contains high amounts of phosphate bearing minerals. The phosphate content of phosphorite is at least 20% which is a large enrichment over the typical sedimentary rock content of less than 0. 2%
CHEMICAL SEDIMENTATION PHOSPHATE DEPOSITS. Aug 28, 2017 MODE OF OCCURENCE phosphate rock or rock phosphate is a non detrital sedimentary rock which contains high amounts of phosphate bearing minerals The phosphate content of phosphorite is at least 15 to 20%, which is a large enrichment over the typical sedimentary rock content of less than 02%
Aug 16, 2011· PHOSPHATE ROCK Events, Trends, and Issues: In 2010, phosphate rock consumption and trade increased worldwide after depressed market conditions in 2008 and 2009. U.S. production was about the same as in 2009, as companies attempted to lower stocks of phosphate rock that had accumulated over the previous year.
The beneficiation of phosphate rock can often be simplified and made more economic by taking into account the distribution of P 2 O 5 and impurities as a function of their deportment between the size fractions resulting from mined and comminuted sedimentary phosphates.
The bulk of commercial phosphorus-based compounds are derived from marine sedimentary phosphate rock deposits, with much of the rest derived from igneous deposits. Sedimentary phosphate deposits are concentrated in two main belts, the trade-wind belt that is aligned north–south from the equator to 50° latitude, and the equatorial belt ...
leaching. Phosphate leached from guano phosphatizes the underlying rocks in some areas, forming apatite where the host rock is limestone and forming aluminum- or aluminum-iron-phosphate minerals where the underlying rock is a silicate. Individual deposits of both igneous apatite and marine phos
DIRECT APPLICATION OF PHOSPHATE ROCK (DAPR) FEEDING THE EARTH Phosphate rock All plants and animals require phosphorus (P), an essential macronutrient. The major source of phosphorus is phosphate rock (PR), a phosphate-bearing mineral which is a finite and non-renewable natural resource. Phosphate rock is the primary raw
rock as phosphatic if it contained 10 to 100 times or more phosphate than normal. There are small, local accumulations of high phosphate sediments, sedimentary rocks, pellets, and nodules, but this chapter will be concerned with large volume phosphate sedimentary rocks, generally called phosphorites.
Significant sedimentary deposits of phosphate rock occur in Idaho, Utah, and, to a lesser degree, Wyoming and Montana. The quality of phosphate rock is most often expressed in P 2 O 5 content, and some of the world's richest phosphate rock deposits contain 30 percent P 2 O 5 or better. Utah contains some of these rich deposits, but some of ...
Aug 28, 2017· MODE OF OCCURENCE phosphate rock or rock phosphate is a non- detrital sedimentary rock which contains high amounts of phosphate bearing minerals. The phosphate content of phosphorite is at least 15 to 20%, which is a large enrichment over the typical sedimentary rock content of less than 0.2%.
Phosphate Rock. The term phosphate rock (or phosphorite) is used to denote any rock with high phosphorus content. The largest and least expensive source of phosphorus is obtained by mining and concentrating phosphate rock from the numerous phosphate deposits of the world.
Classification and Distribution of Phosphate Rock. Phosphate rock content according to the origin of mineralization can be divided into sedimentary rock, metamorphic rock and volcanic rock. At present, the industrial production of Marine sedimentary phosphate rock is about 85%, the rest mainly for igneous rock phosphate rock.
Phosphate rock ore and mining in Khouribga, Morocco. Abdelatif Belmehdi, IMPHOS, Morocco. Phosphate rock broadcast application. Efficient fertilizer use, 1988, FAO, Rome. Maize crop. Nicaragua. FAO/15962/L. Dematteis. The designations employed and the presentation of …
Phosphate and rare earth data from sedimentary phosphate deposits. Download : Download Acrobat PDF file (54KB) Supplementary Data 2. The REE abundances in bulk-rock solids and partial leachates using 0.5 N HCl and 0.4 N H 2 SO 4 as outlined in the Methods section.
Journal of Geochemical Exploration, i6 (1982) 135--160 135 Elsevier Scientific Publishing Company, Amsterdam --Printed in The Netherlands PHOSPHATE-RICH SEDIMENTARY ROCKS: SIGNIFICANCE FOR ORGANIC FACIES AND PETROLEUM EXPLORATION DOUGLAS W. WAPLES Mobil Research and Development Corporation, Field Research Laboratory, P.O. Box 900, Dallas, TX 75221 (U.S.A.) …
from both igneous and sedimentary (but mostly sedimentary) rock. The use of inorganic phosphate fertilizer (aka chemical fertilizer) greatly altered the phosphorus cycle, as shown in this second diagram. Phosphorus in rock is pretty insoluble and thus not directly available to plants. In nature, rock phosphate can become soluble (and available ...
In addition to the sedimentary phosphate deposits, there are some igneous rocks that are also rich in phosphate minerals. Sedimentary phosphate deposits, however, are more plentiful. Sources of Occurrence Large deposits of phosphate from igneous rock are found in Canada, Russia, and South Africa. Deep-sea exploration of the world's
A "hard rock" phosphate reserve in North Central Florida was discovered next. Thus began Florida's phosphate mining industry. Florida's phosphate mining today accounts for about 80% of the phosphate used in the United States, as well as about 25% of the phosphate used around the world.
About 15% of phosphate reserves are found in volcanic (extrusive) igneous rocks. These reserves are found in Russia, Finland, South Africa, and Brazil. Most phosphate reserves are from sedimentary rocks. The phosphate-rich sedimentary rock forms in the shallow oceans mainly due to bacterial activity, but only when several conditions are met.
S. Sedimentary rock phosphate, I. Igneous phosphate, nd. no data. Radioactivity elements in phosphate rock The radioactivity of phosphate rock was probably first observed in 1908, when the British physicist R. Strutt found that samples of phosphorite were …
Phosphate Rock. Phosphate rock (phosphorite) is a marine sedimentary rock, which contains 18–40% P2O5, as well as some uranium and all its decay products, often 70 to 200 ppmU, and sometimes up to 800ppm.
Phosphate Rock and Phosphorite. Phosphate rock and phosphorite are names used for sedimentary rocks that contain at least 15% to 20% phosphate on the basis of weight. The phosphorous content in these rocks is mainly derived from the presence of apatite minerals.
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