“Microstructure is composed of fine ferritic and perlitic constituents without defects like non-metallic inclusions, gas and shrinkage porosity.”

“Sample 33 has perlitic texture and is entirely altered to epidote and chlorite.”

“In the latter areas, ore-related veinlets clearly cut an earlier barren silicification that exploited pathways generated by fracturing of the rocks along perlitic cracks.”