Ithusi livela oketshezini olushisayo, ikakhulukazi olwakhiwe ngamanzi, futhi lukhishwa i-magma epholile.Lezi magma, nazo eziyisisekelo sokuqhuma, zivela ongqimbeni oluphakathi nendawo phakathi komnyombo noqweqwe lomhlaba, okungukuthi, isiphuku, bese zikhuphukela ebusweni bomhlaba ukuze zakhe ikamelo le-magma.Ukujula kwaleli gumbi ngokuvamile kuphakathi kuka-5km no-15km.

Ukwakheka kwe-copper deposit kuthatha amashumi ezinkulungwane kuya emakhulwini ezinkulungwane zeminyaka, futhi ukuqhuma kwentaba-mlilo kuvame kakhulu.ukuqhuma okuhlulekile kuncike ekuhlanganisweni kwamapharamitha ambalwa izinga lomjovo we-magma, izinga lokupholisa kanye nokuqina koqweqwe oluzungeze ikamelo le-magma.

Ukutholakala kokufana phakathi kokuqhuma okukhulu kwentaba-mlilo kanye nezinsalela kuzokwenza kube nokwenzeka ukusebenzisa ulwazi oluningi oluzuzwe izazi zentaba-mlilo ukuze kuthuthukiswe ukuqonda kwamanje kokwakheka kwezinsalela ze-porphyry.