Geochemistry of beryllium in Bulgarian coals

Geochemistry of the barkinite liptobiolith (Late Permian) from the Jinshan Mine, Anhui Province, China

“…The Be content in the Jinshan coal varies from 3 lg/g to 6.4 lg/g, with an average of 5 lg/g. This value is not only higher than the average mean of Be in bituminous coal (3.0±1.2 lg/g), as reported by Eskenazy (2006), but is also higher than that in Chinese and American coals, as reported by Dai et al (2006a) and Finkelman (1993), respectively. Eskenazy (2006) showed that there was no clearcut ''Be content-rank'' relationship.…”

“…Beryllium is predominantly organically bound in deposits with enhanced Be content, whereas the inorganic form prevails in deposits whose Be concentration approximates Clarke values. The enrichment in Be is attributed to subsynchronous hydrothermal and volcanic activity (Eskenazy, 2006). Tungsten is mainly related to organic matter in coal (Eskenazy, 1977;Finkelman, 1995).…”

“…The occurrence mode of Be in coal was only determined on the basis of the relationship between ash yield and Be concentration (Finkelman, 1995). Indirect evidence shows that Be occurs in both organic and inorganic forms (Eskenazy, 2006). Beryllium is predominantly organically bound in deposits with enhanced Be content, whereas the inorganic form prevails in deposits whose Be concentration approximates Clarke values.…”

Trace elements in ferromanganese concretions, gibbsite spots, and the surrounding terra rossa overlying dolomite: Their mobilization, redistribution and fractionation

“…Beryllium is potentially a very toxic element (Edmunds and Trafford, 1993;Eskenazy, 2006). Furthermore, understanding the mobilization and redistribution of Be in continental weathering processes would substantially aid interpretation of cosmogenic 10 Be (or 10 Be/ 9 Be ratio) data for dating, tracing, and erosion rate applications (Brown et al, 1982;Tsai et al, 2008;Willenbring and von Blanckenburg, 2010).…”

Elemental and mineralogical anomalies in the coal-hosted Ge ore deposit of Lincang, Yunnan, southwestern China: Key role of N2–CO2-mixed hydrothermal solutions

“…Owing to its low abundance in coal and its low atomic number, there is no direct evidence (e.g., SEM-EDS, EPMA, or laser-ablation ICP-MS) for the mode of occurrence of Be in coals, and in many coal deposits it has only been deduced by indirect methods (e.g., statistical analysis and density fractions; Eskenazy, 2006;Eskenazy and Valceva, 2003;Kolker and Finkelman, 1998;Kortenski and Sotirov, 2002). Beryllium in coal is generally thought to be either organically bound if it is elevated or claymineral associated when the Be concentration approximates Clarke values (Eskenazy, 2006;Kolker and Finkelman, 1998). However, a study by Dai et al (2012b) showed that the elevated concentration of Be (25.7 μg/g) in the Wulantuga Ge ore deposit is mainly associated with minerals.…”