"dacite porphyry intrusive” a silica-rich igneous rock with larger phenocrysts (crystals) within a fine-grained matrix "deposit” is a mineralised body which has been physically delineated by ...

That means we can identify minerals using how they appear in doubly polarized light under a microscope! Hornblende (brown) with dark reaction rims in plain (singly) polarized light from a sample of ...

Belararox understands the copper mineralisation at Tambo South is hosted in a suite of porphyritic intrusions comprising dacite, porphyritic diorite, quartz diorite and hornblende diorite. The ...

Crystals are direct witnesses of intricate journeys of magma transfer and storage through Earth’s mantle and crust. Crystals thus provide windows into processes that are physically inaccessible yet ...