Bushveld Complex na Vredefort Dome

© David Fleminger

Transvaal Supergroup

Endzhaku kaloko kuhundzile Transvaal Supergroup kufikile Bushveld Complex, leyinga vumbiwa loko nhlayo yikulu ya maribye ya molten rock lawa yanga sukumetiwa kusuka eka Mantle kuya ehenhla kufika eka Transvaal Supergroup. Kunghenisiwa ka maribye lawa kuya eka masalela ya mikhukhula ya Transvaal Supergroup leyinga endliwa hi igneous rock complex tleyi tekaka ndzhawu yo ringana 60 000 square km’s, leyi endlaka leswaku yiva leyikulu swinene emisaveni. Bushveld Complex nayona yina kwalomu ka 80% ya Platinum ya misava hinkwayo. Yay ya hina!
Kambe akungari ntsako na mintlangu ntsena. Kwalomu ka 2 wa mabiliyoni wa malembe lawa yanga hundza, kuvile naku wa ma xiphemu xa ribye lexinga wela emisaveni kwalomu ka 120k’s e dzongeni-vupela dyambu bya Joburg. Ri wile hi matimba swinene lero ribye leri ari fanele kutlakuriwa, kwalomu ka 10km’s ehenhla ka laha ariri kona ekusunguleni. Mbuyelo wakona kuve Vredefort Dome, ku tlumba ka ribye lokukulu swinene lokunga humelela khale loku ku tivekaka emisaveni (ekusunguleni aku pimiwe kufika eka 250km kusuka e matlhelo, hambi leswi xiphemu lexikulu sweswi xinga pfariwa). Ku tlumba ka ribye leri kote kucelela swiphemu swa nsuku, leswi hinkarhi walowo aswiri ekusuhi nale henhla ka misava, leswinga endla leswaku swisivela kubuluka ka mundzuku.
Kambe Vredefort Dome ayi nga tshami yirikarhi yitekiwa tani hi xivumbeko lexinga vangiwa hi kuchayisiwa ka misava naswona, eka malembe lawotala, lavangana vutivi ava tshamela ro humesela ehandle leswi ava tshamba swona leswaku swihumelerile. Hambi swiritano, vulavisisi byintshwa byi kotile kuva byi basisa swilo swotala naku pfumaleka ka ntwisiso eka masungulo ya Dome kusungule kuvuya ku tshamisekisiwa hivutivi bya ti geologists. Hambi leswi ndzinga se twisisaka leswaku kuchayisiwa ka miasava swinga endlisa kuyini dome ematshan’wini ya xirhengele, ndzi fanela ku rhulela xihuku eka vutivi byo hlawuleka byo huma eka lavangana vutivi kutani hi pfumela leswaku himpela masingita lawa hi wona yanga swiendla hinkwaswo leswi.

Translated by Ike Ngobeni

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