Mineralogical and paleocurrent studies of Amasiri Sandstone, a member Ezeaku Group outcropping as ridge in Abini were done to determine the quantitative values component minerals for proper designation facies sandstone direction paleocurrent. Sampling, measurements, petrographic X-ray diffraction (XRD) analyses employed achieve results. Three highly indurated beds white fine – medium, angular -...

In a study based on Pb isotopes, it has been shown that the formation of gold-sulfide mineralization in Early Proterozoic gabbros Northern Ladoga region is associated with different tectonic phases. This conclusion comparative isotopic data for feldspars and lead sulfides two intrusions; Velimäki Alattu-Päkylä. The investigated intrusions have similar geological settings at junction Svecofennia...

The behaviour of Group I and II elements during the petrogenesis felsic igneous rocks is largely controlled by feldspar-liquid relationships. Numerous experimental studies have addressed plagioclase/melt element partitioning, with fewer devoted to potassium feldspar, very few albite-rich ternary-composition feldspar (An ∼ Or < Ab). However, partition coefficient for Ba known increase at ...