Cov xenoliths pom hauv kimberlite suav nrog pob zeb diamond, thiab feem ntau ntawm cov pob zeb diamond mined hauv ntiaj teb niaj hnub no yog pom hauv kimberlite ores. Raws nraim li cas kimberlites tau txais qhov tsim nyog buoyancy rau lawv ntev nce mus txog lub ntiaj teb lub crust, txawm li cas los, yog ib yam dab tsi ntawm ib tug paub tsis meej.
pob zeb diamond zoo li cas hauv kimberlite?
Kimberlite, tseem hu ua av xiav, xim tsaus, hnyav, feem ntau hloov pauv thiab brecciated (fragmented), intrusive igneous pob zeb uas muaj pob zeb diamond hauv nws cov pob zeb matrix. Nws muaj porphyritic kev ntxhib los mos, nrog loj, feem ntau rounded crystals(phenocrysts) ncig los ntawm cov nplua-grained matrix (groundmass).
Kev sib raug zoo ntawm kimberlite thiab pob zeb diamond yog dab tsi?
Kimberlite eruptions, ces, yog tsuas yog txoj kev uas pob zeb diamond ua lawv txoj kev los ntawm qhov tob hauv lub mantle mus rau lub ntiaj teb nto. Pob zeb diamond tsuas yog cov neeg caij tsheb, thiab kimberlites yog lawv thauj.
pob zeb diamond tsim li cas hauv cov kav dej kimberlite?
Mined diamonds that originate in the mantle are created thaum tshav kub thiab siab hloov carbon. Lub mantle yog ze li ntawm 100 mais hauv qab lub ntiaj teb saum npoo av, thiab lub pov haum uas tuaj ntawm lub mantle raug coj mus rau saum npoo los ntawm cov kav dej kimberlite, uas yog tsim los ntawm qhov tob ntawm qhov hluav taws kub tawg.
YYuav ua li cas cov zaub mov muaj nyob hauv kimberlite?
Garnet, chromite, ilmenite, chromium diopside, thiab olivinetshwm sim hauv kimberlites hauvntau ntau dua li pob zeb diamond. Raws li kimberlite qhov taw qhia cov zaub mov, lawv tau siv rau kev nrhiav pom pob zeb diamond, nrog rau kev ntsuas thawj zaug seb lub hom phiaj kimberlite yog pob zeb diamond-cov kabmob lossis tsis.
