During phase two of the program, the site of the multi-ounce gold sample was re-examined and visible gold was discovered within limonitic
vein quartz float.Large blocks and finer talus of vein material mixed with oxidized brecciated vein quartz were also found in several, nearby linear structures.Sporadic outcrops of mineralized, breccia and vein quartz show that these structures strike northeast and dip steeply southeast, and suggest that the mineralized talus is close to its bedrock source.
In the sector containing mineshafts, the andesites present reddish-brown limonitic
patinas, with epidote-chlorite alteration and silicification (Figure 3).
The sample is characterised by banded baritic lead ore from a metasomatic deposit hosted by limestone; galena grains in dark bands can be recognized with coarse-grained white barite lenses and fine-grained limonitic
Pugaev, "Reductive acid leaching of laterite and metal oxides--a review with new data for Fe(Ni,Co)OOH and a limonitic
ore," Hydrometallurgy, vol.
Marls contain thin limonitic
layers with accumulations of the brachiopod Lingula, which is typical of the upper Muschelkalk facies in the Iberian Range (Marquez-Aliaga et al., 1999).
Isolation and characterization of mineral phosphate-solubilizing bacteria naturally colonizing a limonitic
crust in the south-eastern Venezuelan region.
In contrast to figure 3E, there is the pervasive alteration of the grain --shown in figure 3G--that shows a similar yellow clay material developing in the inner surfaces of the vesicles, but the matrix has a bright orange color consistent with limonitic
hydrothermal alteration of iron rich glass.
Georgiou and Papangelakis  expressed that stirring speed had a negligible effect on the rate of nickel dissolution from limonitic
Papangelakis, "Behaviour of cobalt during sulphuric acid pressure leaching of a limonitic
laterite," Hydrometallurgy, vol.
Das, "A comparative study of leaching kinetics of limonitic
laterite and synthetic iron oxides in sulfuric acid containing sulfur dioxide," Hydrometallurgy, vol.
The 35 papers consider such topics as the reductive leaching of limonitic
laterites using ferrous sulphate, comparing intercell contact bars for electrowinning plants, the mineralogical characterization of cobaltic oxides from the Democratic Republic of Congo, the influence of thermo-mechanical treatment on structures and properties of a cobalt-based superalloy, and the starved acid leaching technology (SALT) for recovering nickel and cobalt from saprolites and Caron plant residues.
Elasmobranchii from limonitic
sandstone of Siadlo G6rne near Szczecin, Poland.