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Phosphorite and gypsum occurrence in the Upper Cretaceous Dahomey Basin SW Nigeria Chemistry mineralogy and origin Conference paper; The paleodepositional environment diagenetic and depositional conditions of the Middle Late Miocene Koluz gypsum member NE Van Eastern Turkey
·The article is dedicated to regularities in the distribution of sedimentary phosphorite and manganese deposits in the Lower Paleozoic and Proterozoic formations Special attention is paid to co occurrence of phosphate and manganese ores formed during the Vendian Cambrian shale formation epoch It is shown that shale formation in certain epochs of the
New occurrence of potential phosphate resource in northeast Jordan Khalil M Ibrahim Arabian Journal of Geosciences 2016 Phosphorite deposits of Late Cretaceous and Paleogene age are well known in the Iraqi Western Desert They are part of the regional phosphorite belt of the Tethys which is best developed in North Africa and East
·An exploration program aided by field investigation exploration drilling detailed sampling lithological and petrological studies geochemical investigation and resource calculation leads to the discovery of a potential phosphate resource in northeast Jordan close to the international border with Saudi Arabia and Iraq The studied phosphate is of the Middle
·Estonian phosphorite also contains a significant amount of rare earth elements which may have economic potential Phosphorite in Estonia was studied in detail from the 1950s up to the end of 1980s Unfortunately most of the old rock samples have now been destroyed or are in a poor condition
·Phosphorite is not renewable and replaceable As an important strategic resource it is the material basis of food supply and fine phosphorus chemical production Dhahri et al 2016; Zhang et al 2020 Phosphorite deposits in China are dominated by sedimentary phosphorite that accounts for 79% ofthe reserves
·All particles settling to the sea floor continuously undergo diagenetic alteration due to physical and chemical processes in the sediment particle mixing compaction redox reactions
·The first represents the phosphorite occurrence in the Red Sea region from Safaga due north to Hammadat and Zug El Bohar south of Quseir The phosphorite of this domain operated along half a century through underground mining and the appropriate approach for beneficiation Framboidal pyrite witnesses the anoxic conditions that prevailed
·Phosphorite type rare earth deposits which are one of the important types of rare earth elements REE ore deposits have attracted increasing attention because of the extreme enrichments in heavy rare earth elements HREE including Yttrium Y In this study in situ geochemical analyses of apatite grains from Zhijin phosphorites were conducted using
Geologic Occurrence Apatite forms under a wide variety of conditions and is found in igneous metamorphic and sedimentary rocks The most important deposits of apatite are in sedimentary rocks formed in marine and lacustrine environments Phosphate rock and phosphorite are names used for sedimentary rocks that contain at least 15% to 20%
During the Xth International Congress on Sedimentology a symposium on marine phosphorites was held in Jerusalem Israel 9 14 July 1978 This volume contains the papers delivered at this meeting and represents the main interests inspiring the
·Phosphorite is a sedimentary rock that contains a high concentration of phosphate is the primary source of phosphorus an essential element for life on Earth Phosphorite deposits are formed over geological time through the accumulation of marine organic debris and phosphate rich sediments These deposits are typically found in marine
Phosphorites are rocks enriched in phosphorus relative to average crustal abundances an enhancement usually expressed in terms of P 2 O 5 concentrations Whereas the average P 2 O 5 content of continental crustal rocks is estimated as percent Ronov and Yaroshevsky 1969 and sedimentary rocks average percent McKelvey 1973 rocks typically
·a compilation of geology of uranium and thorium in black shale phosphorite and in the secondary resources of Estonia Figure 1 Overview of phosphorite and graptolite argillit e black shale deposits occurrence areas and other sites of interest 2 Materials and Methods
·Phosphate rocks are a vital resource for world food supply and security They are the primary raw material for phosphoric acid and fertilizers used in agriculture and are increasingly considered to be a potential source of rare earth elements Phosphate rocks occur either as sedimentary deposits or igneous ores associated with alkaline rocks In both cases
·Reddish phosphorite is relatively enriched in Al Mg K Ti Zr Ga Cr Fe and rare earth elements REEs whereas cream phosphorite enriched in U Ca Na and Y Geochemistry of the iron oxide
·Phosphorite breccias compose a 6 m thick member in the Vendian terrigenous Kernos Formation in the basin of the Mezhevaya Utka and Sylvitsa rivers Middle Urals Phosphorite pebbles and gravelites are accumulations of the fragments of redeposited crusts originally formed during early diagenesis near the surface of sandy clayey rocks below the
·Deep sea minerals A manganese nodules; B ferromanganese crust; C a massive sulfide formation at hydrothermal vent site; D REE rich marine mud; and E phosphorite is a sedimentary rock
Phosphorite phosphate rock or rock phosphate is a non detrital sedimentary rock that contains high amounts of phosphate phosphate content of phosphorite or grade of phosphate rock varies greatly from 4% [1] to 20% phosphorus pentoxide P 2 O 5 Marketed phosphate rock is enriched "beneficiated" to at least 28% often more than 30% P 2 O 5
<p>The Xinhua phosphate mining are alocated in Zhijin County Guizhou Province is a famous superlarge low grade phosphate deposit containing rare earth elements in the southwest of average P<sub>2</sub>O<sub>5</sub> grade of the deposit is % The proven phosphorite ore resources are billion tons and the rare earth resources are 3 500
This paper studies the deposit of rare earth typical samples were collected and the basic chemical compositions of the samples were studied using ICP AES and test results of forty elements were analyzed the amount of minerals and their occurrence were determined and the distribution characteristic of rare earth was results show that
·The reserve of rare earth element bearing phosphorite ores in Guizhou province in western China is huge Increased demand for the different products manufactured from rare earth elements has resulted in an extreme need for reasonable and comprehensive extraction of rare earth elements An improved understanding of rare earth element
