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classification of ore deposits | nature,niggli has followed his important monograph of 1920 on the function of the volatile constituents in petrology by an interesting essay on their importance in the classification of ore deposits..classification of ore deposits - slideshare,niggli classification •niggli considered only mineral deposits related to magmatic processes •the deposits formed under high temperature-high pressure, deep- seated conditions are termed as plutonic, or intrusive; and the deposits formed under low temperature-low pressure, near-surface conditions are termed as volcanic, or extrusive..mineral deposits: classification | springerlink,the first genetic classification of ore deposits to win wide acceptance was that initially proposed by waldemar lindgren in 1906 and last revised by him in 1933. as ideas on the genesis of ores have undergone change in the thinking of geologists, the lindgren classification has come under attack mainly by.waldemar lindgren | american geologist | britannica,waldemar lindgren, (born feb. 14, 1860, kalmar, swed.—died nov. 3, 1939, brighton, mass., u.s.), swedish-born american economic geologist noted for a system of ore classification that he detailed in his book mineral deposits (1913). lindgren graduated in 1882 as a mining engineer from the freiberg mining academy in germany. following a year of postgraduate work at freiberg, he immigrated to the.
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abstract. three principal systems of classification of ore deposits of magmatic affiliations are in current use—the lindgren depth-zone classification, the nigg,classification of ore deposits - college of science,modified lindgren’s classification: modified in 1985 to conform with lindgren’s original basis for classification. only the term “epithermal” was retained (table 3)! still a very popular classification! evans (1997): classified ore deposits on the basis of their “geologic setting” (table 4). the classification is very simple, but it also lumps many different types together. geol 481: earth resources. el-shazly, 2003
niggli’s (1929) classification of ore deposits • i plutonic or intrusive – orthomagmatic • diamonds, platinum-chromium • titanium-iron-nickle-copper – pneumatolytic to pegmatitic • heavy metal alkanline earth phosphorous-titanium • silicon-alkali-fluorine-boron-tin-molybdenum-tungten • tourmaline-quarts – hydrothermal • iron-copper-gold-arsenic • lead-silver-zinc • nickle-cobalt-arsenic-silver • carbonates,map: classification lindgren - blogger,lindgren (1907, 1913 and 1922) popularized the genetic classification or deposit of product classification mechanics or chemical concentration and classification of hydrothermal veins (hydrothermal vein). in group lindgren including pirometa- somatic (igneous metamorpik) and hydrothermal deposits.
iv. exhalation deposits lindgren classification of ore deposits. i. deposits produced by mechanical processes of concentration. ii. deposits produced by chemical processes of concentration. a. in bodies of surface waters. 1) by interaction of solutions. a. inorganic reactions. b. organic reactions. 2) by evaporation of solvents. b. in bodies of rocks.,Ł classification of ore deposits: why bother?,lindgren classification: 1-magmatic ores 2-hydrothermal ores (hypothermal, mesothermal, epithermal, telethermal, xenothermal) 3-metamorphic ores 4-ores in water bodies 5-mechanical concentrations meyer classification: mafic igneous Łvolcanogenic massive sulfides Łsediment-hosted ores eg. (iron formation, mvt, bedded cu) Łstratabounddeposits eg.
syngenetic ore deposits ore deposits which are formed as the same time as the enclosing rock, are called “syngenetic ore deposits”. sedimentary ore deposits are the example of syngenetic ore deposits. 4. epigenetic ore deposits the ore deposits that are formed later than the enclosing rock, are called “epigenetic ore deposits”. hydrothermal ore deposits are the example of epigenetic ore deposits. 5.,chapter a introduction to geoenvironmental models of,ore formation (lindgren, 1933), and genetic setting (park and macdiarmid, 1975; jensen and bateman, 1979). none of these classification schemes is mutually exclusive; instead, there is considerable overlap among all of these classifications. a natural outcome of efforts to classify mineral deposits is the development of “mineral deposit
classification of ore deposits purpose of classification: to group similar objects into classes or sets either for convenience, organization or access. grouping together deposits with similar characteristics facilitates: a. description,ppt – lecture 2 ore deposit classification and ore,metal ore mining global market report 2019 - the metal ore mining market size is expected to reach $660 billion by 2022, significantly growing at a cagr of around 10% during the forecast period. the growth in the metal ore mining market is due to the expectation of greater stability in the commodity prices, and rising demand for iron ore products from developing countries such as china and india, for
lindgren classification of ore deposits i. deposits produced by mechanical processes of concentration. ii. deposits produced by chemical processes of concentration.,a classification of mineral systems, overviews of plate,lindgren's (1933) classification of ore deposits remains a landmark achievement. for example, his ideas of epithermal, hypothermal and telethermal are still valid concepts today. for example, his ideas of epithermal, hypothermal and telethermal are still valid concepts today.
deposit types. metallogenicprovince:a region characterized by a particular assemblage of mineral deposit type. epithermal:hydrothermal ore deposits formed at shallow depth (less than 1500 m) and fairly low temperature (50-200 ˚c) mesothermal:hydrothermal ore deposits formed at intermediate depth (1500 Œ4500 m) and temperature 200 -400˚c),epithermal au-ag deposit types – implications for,schemes for the classification of epithermal au-ag deposit styles began with the initial recognition of the development of epithermal mineralisation at shallower crustal levels than mesothermal and porphyry deposits (lindgren 1922, 1933), and progressively incorporated different deposit styles using the acid sulphate and adularia-sericite
most classifications scattered the deposits among the mesothermal and hypothermal regimes of lindgren (1933). others, such as bateman (1950), divided these deposits into groups within a very broad `cavity filling' type of epigenetic ore deposit. hence, many archaean lodes were classified as fissure filling type deposits, otago was a shear zone,lindgren, waldemar | article about lindgren, waldemar by,from 1884 he studied ore deposits in the united states, norway, sweden, germany, austria, italy, australia, mexico, chile, and bolivia. much of lindgren’s scientific work is devoted to the geology of ore deposits, and his most important works are related to the elaboration (in 1903) of a genetic classification of mineral deposits.
a syngenetic mineral deposit is a deposit which formed at the same time as the rocks that enclose it. magmatic deposits are syngenetic in that the ore minerals crystallize from the same liquid that produces the silicate minerals which form the bulk of the intrusive - they crystallize more or,waldemar lindgren | article about waldemar lindgren by the,from 1884 he studied ore deposits in the united states, norway, sweden, germany, austria, italy, australia, mexico, chile, and bolivia. much of lindgren’s scientific work is devoted to the geology of ore deposits, and his most important works are related to the elaboration (in 1903) of a genetic classification of mineral deposits.
lindgren (1922) to imp'ly metasomatism at high temperatures, ore deposits, such as porphyry copper and greisen deposits. classifications skarn deposits have been classified by scale, by structure, by the rock replaced, and by the metals mined. classifications have also been 3ltcmpted based on the,epithermal gold deposits bruce e. taylor geological …,early workers (e.g. lindgren, 1922, 1933; emmons, 1924) emphasized a broad depth-zoning classification of hydrothermal metal deposits in which epithermal deposits were interpreted to have formed in a ‘shallow’ regime, qual-
this scheme, proposed by waldemar lindgren (1933) classified hydrothermal deposits as hypothermal, mesothermal, epithermal and telethermal. genesis of common ores as they require the conjunction of specific environmental conditions to form, particular mineral deposit types tend to occupy specific geodynamic niches,  therefore, this page has been organised by metal commodity.,ore deposits of the jerome and bradshaw mountains,(see fig. 1.) the object of this work was not a detailed investigation of each deposit but rather a coordination and classification of the occurrences and an attempt to ascertain their origin and economic importance. almost all the deposits occur in pre-cambrian rocks or in rocks that are not readily differentiated from the pre-cambrian.
there are two main approaches to mineral deposit classification. the descriptive models are a more objective label, which describes the rocks and tectonic setting of the deposit. these have now evolved to what is known as a genetic model, which includes theories on deposit formation as well as the physical properties of the mineral deposit.,ore minerals : what are ore minerals? | geology page,classification of ore minerals. ore mineral deposits are categorized according to different criteria that have been established through the study of economic geology or mineral genesis. typical are the classifications below. hydrothermal epigenetic deposits. mesothermal lode gold deposits, typified by the golden mile, kalgoorlie
the keeping of deposits is one of the chief functions of banks at the present time and is directly connected with the currency function. two classes of deposits, however, must be distinguished. a. deposits of securities. - the growth of so-called stock companies and the development of the credit system has brought into existence a great variety of securities the safe-keeping of which is a,the 'chessboard' classification scheme of mineral deposits,a perspective on how this concept might work is given in the text by a pilot project on mineral deposits in central europe and in the spreadsheet classification scheme by providing a color-coded categorization into 1. mineralization mainly related to planar architectural elements, e.g. sequence boundaries subaerial and unconformities 2
deposit classified for providing field guidelines •stratiform, stratabound and tabular deposits of regular habit •stratiform, stratabound and tabular deposits of irregular habit •lenticular bodies of all dimensions, including bodies occurring en echelon , silicified linear zones of composite veins,intrusion-related gold systems. a brief summary by bruce,progression of classification of gold deposits related to magmatic rocks as commencing with the term porphyry gold deposits (after the usage of porphyry copper deposits) in 1992 by hollister. this ignores the fact that sillitoe (1979) had earlier introduced the concept of a porphyry gold deposit style.