Common deposits associated with andesitic rocks include porphyry copper, skarn, epithermal gold-silver, volcanogenic massive sulfide (VMS), and banded iron formations (BIFs). Andesitic rocks act as hosts or heat sources for mineralization processes, contributing to the formation of economically significant mineral deposits. Understanding these associations is crucial for mineral exploration and resource assessment in volcanic terrains.
Copper Deposits, Gold Deposits, Silver Deposits, Lead-Zinc Deposits, Epithermal Deposits, Skarn Deposits
The most common ore deposits formed in andesite igneous rocks are porphyry copper deposits, epithermal gold and silver deposits, and deposits of lead, zinc, molybdenum, iron, tin, and tungsten.
Dear Gholamreza: again, andesites are not the host of porpyry copper-molybdenum deposits, these deposits are in plutonic rocks, with andesitic composition, such as granodiorite, quartz-diorites and tonalites. Andesites could be associated with the granitic porphyries, but they are not the host rock of those deposits. At higher levels in this tectonic setting of active margins or mature island arcs, there could be found rich epithermal Au-Ag deposits asociated with the roots of ancient stratovolcanoes with andesitic to dacitic composition, like it happens in the Perú-Chile volcanic arc, and in many ancient exhumed volcanic arcs worldwide. Also are possible VMS of Zn-Pb, of Kuroko type (in young rocks, such as om the Japanese central plains) or Cu-Zn-Au Noranda type (in Precambrian rocks), associated with andesitic to rhyolitic rocks in greenstone belts, such as those in the Abititi GSB in Ontario, Canada. Regards, Sebastián.
- Badges
- Science topic
- Similar topics
- Biological Science
- Bioecology
- Systems Ecology
- Landscape Ecology
- Connectivity