Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 8 of 8 for “"ore-forming processes"”.
-
In situ mineral geochemistry as a guide to ore-forming processes
… analyses are essential to our understanding ore-forming processes, but traditionally these techniques have required bulk digestion of rocks and minerals. Recent advances in in situ microanalytical techniques permit us to analyse samples on a mineral-by mineral basis and probe the chemistry of …
-
In situ mineral geochemistry as a guide to ore-forming processes
… analyses are essential to our understanding ore-forming processes, but traditionally these techniques have required bulk digestion of rocks and minerals. Recent advances in in situ microanalytical techniques permit us to analyse samples on a mineral-by mineral basis and probe the chemistry of …
-
Petrography and geochemistry of hydrothermal breccias hosted in the Schrikkloof Formation (Rooiberg Group), north of Modimolle, South Africa
… upper Schrikkloof Formation is associated with ore forming processes or not. The study area is located approximately 20 km north of Modimolle and a total of 30 rock samples (7 rhyolites, 10 tuffs, 12 hydrothermal breccias and 1 vein) was collected from outcrops. These samples were sent for …
-
Platinum-group elements geochemistry of felsic rocks
… concentrate and fractionate during magmatic processes, especially in felsic magmatic systems, is poorly understood. The felsic igneous rocks are often linked to hydrothermal Cu-Au mineralization and the presence or absence of sulfide saturation during fractionation is critical to the ore …
-
Platinum-group elements geochemistry of felsic rocks
… concentrate and fractionate during magmatic processes, especially in felsic magmatic systems, is poorly understood. The felsic igneous rocks are often linked to hydrothermal Cu-Au mineralization and the presence or absence of sulfide saturation during fractionation is critical to the ore …
-
Geochemical controls on the fluid evolution of submarine and subaerial ore-forming hydrothermal systems
… volcanic-hosted massive sulfide (VHMS) deposits. Ore-forming processes related to VHMS deposits are one of the oldest on Earth and account for more than half of the past global production of zinc and lead, 7 percent of the copper, 18 percent of the silver, and a significant amount of gold and …
-
A study of the berg Aukas-type Pb-Zn-V deposits in the Otavi mountain land, Namibia
… and isotopic aspects of the crystallization processes taking place in carbonate-hosted Berg Aukas-type Zn-Pb-V deposits of the Otavi Mountain Land in Northern Namibia. Numerous studies have shown that ore formation in Mississippi Valley-type deposits bears a close relationship with carbonate …