MICROHARDNESS OF GALENA RELATED TO AG-BI-CONTENT, ORIENTATION AND DEFORMATION

• Main Authors: Hans Pauly, Heinrich Siemes
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Greenland; Lebedeva; Mesters Vig; East Greenland
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.566.1138; http://2dgf.dk/xpdf/bull22-01-50-78.pdf

oriented cleavage pieces of galenas from Ivigtut, South Greenland, from Mesters Vig, East Greenland, and on fine grained galena from Bunker Hill, USA. The galenas from Ivigtut contain up to 5 % matildite, AgBiS2, in solid solution whereas the galena from Mesters Vig is virtually pure galena. The galena from Bunker Hill was artificially deformed to varying degrees. Increasing matildite content and increasing VHN show positive correlation as already demonstrated by Lebedeva (1963). VHN-determinations are, however, not usable as an indicator for silver content because VHN also depends on other factors. The orientation of the sample and of the indentation give rise to variations of up to 20 VHNs in the same galena. Deformation raises VHN; 36 % compression was found to increase VHN 20%. Other factors, not identified in this work, also seem to influence the VHN of galena.