Complex sentence: Volcanic systems like Antofalla and volcano-plutonic complexes often develop mineral deposits through hydrothermal and epithermal processes; such has also happened at Antofalla, yielding occurrences of gold, lead, silver and zinc.
Split into simpler sentences: Volcanic systems like Antofalla and volcano-plutonic complexes often develop mineral deposits through hydrothermal and epithermal processes. Such has also happened at Antofalla, yielding occurrences of gold, lead, silver and zinc.