scholarly journals Gold Mineralization in Banded Iron Formation in the Amalia Greenstone Belt, South Africa: A Mineralogical and Sulfur Isotope Study

2013 ◽  
Vol 63 (2) ◽  
pp. 119-140 ◽  
Author(s):  
Kofi Adomako-Ansah ◽  
Toshio Mizuta ◽  
Napoleon Q. Hammond ◽  
Daizo Ishiyama ◽  
Takeyuki Ogata ◽  
...  
Keyword(s):  
South Africa ◽  
Greenstone Belt ◽  
Sulfur Isotope ◽  
Gold Mineralization ◽  
Iron Formation ◽  
Banded Iron Formation ◽  
Isotope Study

Structure of veins in a gold–pyrite deposit in banded iron formation, Amalia greenstone belt, South Africa

1986 ◽  
Vol 123 (6) ◽  
pp. 601-609 ◽  
Author(s):  
J. R. Vearncombe
Keyword(s):  
Greenstone Belt ◽  
Quartz Vein ◽  
Gold Mineralization ◽  
Iron Formation ◽  
Banded Iron Formation ◽  
Vein Wall ◽  
Quartz Veins ◽  
Anticlockwise Rotation ◽  
Fibre Growth ◽  
Mineralizing Fluids

AbstractFibrous quartz veins in deformed banded iron formation of the Amalia greenstone belt, southwestern Transvaal, are spatially related to gold–pyrite mineralization in both wallrock and vein inclusions. Poles to quartz vein orientations show a general parallelism with mineral elongation and fold plunges of the principal deformation in the wallrock. Quartz vein fibres show a consistent anticlockwise rotation, late components being subparallel to the elongation lineation, suggesting veining was probably synchronous with the principal deformation. Antitaxial fibrous veins, which dominate the mineralized banded iron formation, formed by the process of crack–seal which channelled mineralizing fluids along the vein walls, increasing the potential for fluid–wallrock interaction. Gold mineralization in quartz veins occurs in wall-parallel slivers of banded iron formation which have been plucked off the vein wall during antitaxial fibre growth. Mineralization can be explained by a process of fluid–wallrock interaction with sulphidation and gold precipitation.

scholarly journals Paleoarchean sulfur cycling: Multiple sulfur isotope constraints from the Barberton Greenstone Belt, South Africa

2015 ◽  
Vol 267 ◽  
pp. 311-322 ◽  
Author(s):  
Alice Montinaro ◽  
Harald Strauss ◽  
Paul R.D. Mason ◽  
Desiree Roerdink ◽  
Carsten Münker ◽  
...  
Keyword(s):  
South Africa ◽  
Greenstone Belt ◽  
Sulfur Isotope ◽  
Sulfur Cycling ◽  
Barberton Greenstone Belt
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