A new way of interpreting trace element concentrations with respect to modes of mineral formation |
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| Authors: | P Mller P Dulski F Schley J Luck W Szacki |
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| Institution: | P. Möller, P. Dulski, F. Schley, J. Luck,W. Szacki |
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| Abstract: | The availability of multi-element analyses provides numerous data on trace elements. These data complete petrochemical analyses in general and are often reported as averages although they vary over many orders of magnitude. It can be shown that the variation of trace elements in ores is related to fundamental processes during ore formation. As examples the fractionation of the lanthanoids in Ca-minerals (fluorite, calcite, apatite, phosphorite, etc.), chalcophile elements in sphalerite and Ga, Sc, W, and Fe in cassiterite are discussed. Plotting of analytical data in variation diagrams (fractional index vs. chemical environmental index) help to decipher the mode of mineral formation.The information obtained from trace and minor element fractionation are discussed with respect to the probable origin of hydrothermal solutions. |
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