| dc.description.abstract | The area of Långban, Värmland, is well investigated in terms of the many exotic minerals
occurring in the area. In contrast, less focus has been given to the trace element systematics of
the commonly occurring skarn-forming minerals. The composition of major and trace
elements in rock-forming phases can yield valuable information for understanding various
geological events and mineralization processes. Therefore, this study has conducted
geochemical analysis on commonly occurring skarn minerals from three different rock
samples collected at Långban, Bergslagen. The analysis was performed using techniques such
as a Scanning Electron Microscopy (SEM), Raman spectroscopy, and Laser Ablation –
Inductively Coupled Plasma – Mass Spectrometer (LA-ICP-MS). Overgrowth zonings have
been investigated in these phases to understand the paragenetic sequence of minerals, effects
of fluid migration, and the substitution of elements. Results show textural and chemical
variations between phases and across different zones. A variation in Eu2+ -anomaly between
phases coupled with Mn and Zn concludes the relative age difference between magnesiohastingsite
and tremolite in the paragenetic sequence. The enrichment of As, Sb, Bi, Ba, Pb,
Zn, and Cu visible in the diopside, along with an Mn-enrichment, suggests a coupling of
these. However, the concentration of Pb, Ba, As, Bi, Sb, and Cu in the rim of calcite do not
show any coupling with Mn, suggesting several mobilization events of these commonly
enriched elements in the Långban area. | en_US |
