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[en] The quality of natural mineral water is a universal health problem seeing its vital importance. This problem is related to the presence of the radionuclides since this water is coming from underground, during their circulation it dissolves and conveys the radionuclides which are present in the earth's crust. This problem which leads to the contamination of the mineral water urged the World Health Organization to set standards and to recommend the respect of the median values of the activities alpha and beta within the framework of the man protection against this internal exhibition. Concerning the radiological quality of Tunisian mineral water studied in this project, we showed, by using the gross alpha and beta activities counting, that this water is specific to human consumption since their gross alpha and beta activities do not forward any risk on health.
[en] This volume describes Niger Republic mineral substances capable of rising economic interest. After relating minerals occurrence , indices and deposits types, conclusions and recommendations have been made for mineral prospecting. Mineral substances described are : Copper, lead and zinc, molybdena, iron, manganese, titanium, vanadium, nickel and chrome ( cobalt and platinoid ), lithium, lignite, diamond and diverse substances rare earth, beryllium, silver, bismuth arsenic and antimony, barytine, alunite, talc and asbestos ( graphite and diatomite)
[fr]Ce volume decrit les substances susceptibles de presenter un interet economique au Niger. Apres avoir relate leurs occurrences , indices et types de gisement auxquels elles appartiennent des conclusions et recommendations ont ete faites pour la prospection. Les substances ainsi decrites sont : le cuivre, le plomb et le zinc, le molybdene, le fer, le manganese, le titane et le vanadium, le nickel et le chrome (Cobalt et platinoides), le lithium, le lignite, le diamant et les substances diverses ( terres rares, beryllium), argent, bismuth, arsenic et antimoine, barytine, alunite, talc et amiante (graphite et diatomite)
[en] The Bureau du Recherche Geologique et Mini ere was been required by Instituto -Geologique del Uruguay and Soils resources studies commission with the aim not only to make arrangements between precious stones exploitations in Uruguay but also re valorization of uncut stones and selective trade of products with a better quality.
[en] The paper reviews nuclear physical methods used in the USSR for the prospecting, exploration and working of mineral resources
[fr]Le memoire donne un apercu des methodes de physique nucleaire appliquees en Union sovietique a la prospection et a l'exploitation des gisements de mineraux. (author)
[es]En el trabajo se describen los metodos de fisica nuclear, aplicados en la U.R.S.S. para la prospeccion, exploracion y explotacion de yacimientos minerales. (author)
[ru]V doklade daetsya obzor metodov yadernoj fiziki, primenyaemykh v SSSR pri poiskakh, razvedke i razrabotke poleznykh iskopaemykh. (author)
[en] This volume contains the detailed study of mineral substances industrially exploited to date : uranium, coal, non metallic building materials and public activities, and non conventionally exploited substances, that are : tin, columbite-tantalite, tungsten, gold, phosphates and evaporates
[fr]Ce volume contient l'etude detaillee des substances minerals exploitees industriellement a ce jour : l'uranium, le charbon, les materiaux non metalliques de construction et de travaux publics et les substances exploitees artisanalement qui sont : l'etain, la Colombo-tantalite, le tungstene, l'or, les phosphates et les evaporates
[en] This paper reports that of all the rare earths, yttrium probably has the most diverse range of applications. Many of these uses, particularly in phosphor and ceramic applications, are stimulating high rates of growth in demand for yttrium. On the other hand, resources of yttrium are readily available and recent increases in supplies from China have resulted in yttrium being oversupplied. The likely future demand for yttrium is assessed on the basis of current consumption and a range of growth assumptions. In the context of this future demand scenario, the availability of yttrium from present sources is examined together with the possibility of increased supplies of yttrium being available from new rare earth resources
[en] This article summarizes the available geological and gitological (ore-deposit) data for the northern part of French Guiana, illustrating and commenting on a 1/350000 scale geological map (plate) on which are plotted the deposits and occurrences of metallic and nonmetallic substances. The first part is devoted to a description of the major lithological units, to a discussion of the Palaeoproterozoic evolution and to a comparison with the Palaeoproterozoic of West Africa. The position of gold mineralization within the Palaeoproterozoic lithostructural evolution of northern French Guiana is determined too. The second part, which concerns the mineral resources, deals more particularly with the gold mineralization. (O.L.). 206 refs., 23 figs., 4 tabs