Leej twg tsim Klerksdorp Spheres 3 txhiab xyoo dhau los?

Leej twg tsim Klerksdorp Spheres 3 txhiab xyoo dhau los?
Leej twg tsim Klerksdorp Spheres 3 txhiab xyoo dhau los?
Anonim

Klerksdorp Spheres yog cov khoom me me, suav txij ntawm kheej kheej mus rau daim duab-zoo li tus, uas tau sau los ntawm cov neeg khawb av los ntawm 3 billion-xyoo-laus pyrophyllite tso nyiaj los ntawm Wonderstone Ltd. ze rau Ottosdal, South Africa.

Lwm cov kws tshawb fawb thiab cov kws tshaj xov xwm tau hais txog lawv hauv phau ntawv, cov ntawv nyiam, thiab ntawm ntau lub vev xaib raws li cov khoom cuav uas piav tsis tau uas tsuas yog tsim los ntawm cov ntse.

Cov kws tshawb fawb geologists uas tau kawm txog cov khoom no hais tias cov khoom no tsis tau tsim, tab sis yog los ntawm cov txheej txheem ntuj tsim.

Rulph Marks, tus saib xyuas ntawm Klerksdorp Tsev khaws puav pheej, South Africa, uas muaj qee thaj chaw:

"Spheres yog qhov paub tsis meej. Lawv zoo li tsim dag, tab sis lub sijhawm ntawd hauv keeb kwm ntawm Lub Ntiaj Teb, thaum lawv nres hauv pob zeb no, lub neej ntse tsis muaj nyob."

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Raws li tsab xov xwm los ntawm J. Jimison, kheej kheej yog ob hom: "ib qho yog ua los ntawm cov hlau uas muaj xim daj nrog cov xim dawb, thiab lwm qhov yog qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob pob pob zeb."

Hauv tsab ntawv hnub tim 12 lub Cuaj Hli 1984, Rulf Marks sau hais tias: “Tsis muaj ib yam txuj ci uas tau tshaj tawm txog lub ntiaj teb, tab sis qhov tseeb muaj raws li hauv qab no: lawv tau pom nyob hauv pyrophyllite, uas yog khawb ze lub nroog Ottosdal nyob rau sab Hnub Poob Transvaal.

Cov pyrophyllite no yog cov ntxhia uas muaj ntxhiab tsw ntxhiab nrog tus lej tsuas yog 3 ntawm Mohs nplai thiab tau tsim los ntawm kev tso dej ntau txog 2.8 txhiab xyoo dhau los. Ntawm qhov tod tes, cov pob, uas muaj cov qauv ua haujlwm sab hauv nrog lub plhaub nyob ib puag ncig lawv, nyuaj heev thiab tsis tuaj yeem khawb txawm tias yog hlau."

Mohs hardness scale yog lub npe tom qab Friedrich Mohs, uas tau xaiv kaum lub pob zeb hauv av raws li cov ntsiab lus siv rau kev sib piv sib piv, nrog qhov muag muag tshaj plaws (1) thiab pob zeb nyuaj tshaj plaws (10).

A. Bisshoff, xibfwb qhia txog geology ntawm Potchefstroom University, hais tias cov spheres no yog "limonite nodules." Limonite yog ib hom hlau hlau. Ib qho nodule yog cov pob zeb sib npaug sib npaug ua ke los ntawm kev sib koom ua ke ib puag ncig ntawm cov tub ntxhais. Ib qho teeb meem nrog qhov kev xav tias cov khoom yog limonite nodules tau ua nrog lawv cov tawv.

Raws li tau sau tseg saum toj no, cov hlau tsis tuaj yeem khawb nrog cov taub hlau, qhia tias lawv nyuaj heev. Tab sis cov txheej txheem hais txog cov ntxhia hais tias limonite tsuas yog sau npe 4-5.5 ntawm Mohs nplai, qhia tias qib qis kuj nyuaj.

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Ib qho ntxiv, limonite nodules feem ntau tshwm sim hauv pawg, zoo li cov pawg ua ke ua ke ua npuas dej. Lawv feem ntau tsis cais thiab sib npaug zoo ib yam, zoo li cov khoom hauv nqe lus nug. Lawv feem ntau tsis tshwm nrog cov kab zauv uas nyob ib puag ncig lawv.

Txhua qhov piv txwv ntawm cov khoom no uas tau tshuaj xyuas los ntawm Heinrich tau qhia txog cov txheej txheem radial zoo heev, xaus rau hauv nruab nrab lossis hauv cov chaw ntawm Klerksdorp kheej.

Los ntawm petrographic thiab X-ray diffraction tsom ntawm cov qauv ntawm cov khoom no, Heinrich pom tias lawv suav nrog hematite (Fe2O3) lossis wollastonite (CaSiO3) sib xyaw nrog me me ntawm hematite thiab goethite (FeOOH).

Kev soj ntsuam los ntawm Cairncross, Nel, thiab lwm tus tau pom tias ntau ntawm Klerksdorp spheres pom hauv qhov tsis hloov pauv pyrophyllite yog tsim los ntawm pyrite (FeS2). Cov xim ntawm cov qauv kawm los ntawm Heinrich tau hloov pauv los ntawm xim av liab xim av, xim liab mus rau xim liab. Cov xim ntawm cov khoom pyrite no tsis paub.

Rau lub hom phiaj ntawm txoj kev tshawb fawb no, peb txaus siab tshaj plaws nyob rau hauv ib puag ncig nrog peb qhov sib sib zog nqus zawj nyob ib puag ncig. Txawm hais tias peb xav tias thaj chaw nws tus kheej yog limonite nodule, nws tseem tsim nyog yuav tsum coj mus rau hauv tus account peb qhov sib npaug grooves - lawv tshwm sim li cas?

Thaum tsis muaj qhov kev piav qhia zoo txaus, qhov pov thawj yog qhov muaj txiaj ntsig zoo, tawm mus qhib qhov ua tau tias qhov chaw nyob ib puag ncig pom hauv 2.8 billion-xyoo-laus cov pob zeb hauv av hauv South Africa tau tsim los ntawm kev txawj ntse.

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