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a Geological map of the Surnak deposit with modifications and additions by the authors. Inset: Tectonic scheme of Bulgaria (Dabovski and Zagorchev 2009) and the location of the Kroumovgrad goldfield (KG). b Geological cross-section along I-II line with added locations of the taken drill hole samples and the spatial distribution of the main ore-forming stages according to the authors (courtesy of DPMK)

a Geological map of the Surnak deposit with modifications and additions by the authors. Inset: Tectonic scheme of Bulgaria (Dabovski and Zagorchev 2009) and the location of the Kroumovgrad goldfield (KG). b Geological cross-section along I-II line with added locations of the taken drill hole samples and the spatial distribution of the main ore-forming stages according to the authors (courtesy of DPMK)

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a Geological map of the Surnak deposit with modifications and additions...
Mineral paragenetic sequence in the Surnak deposit
BSE image of barite, quartz, and pyrite from the footwall of the steep...
Photographs of representative samples from the steep brecciation zone....
+8 Photomicrographs illustrating pyrite and quartz appearance in reflected...
Ore and gangue mineral textures, fluid inclusions, mesoscopically structured quartz and pyrite, and their bearing on the genesis of hydrothermal breccias in the low-sulfidation Surnak gold deposit, SE Bulgaria
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  • Jan 2025
This paper provides comprehensive analyses of mineral microtextures, nanoparticulate electrum, defective crystal structures of key primary hydrothermal minerals - quartz and pyrite, the bulk sulfur isotopic composition of pyrite and marcasite, and fluid inclusions in hydrothermal quartz and calcite, all aimed at characterizing ore mineralization. T...
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