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Country

Cwiada

(Superior Southern A SI PrOYinces)

Natur* of gold

Free or combinod aa

telluride. or antimonido. Somo i nti motety anodatod with pyrito, orsenopyrite and sulphosatts

Principal metallic minerał*

i, arsenopyrito, and pyrrhotile. Minor galena, iphalerite, chalcopyrite, stibnite, molybdenite, scheelite and various sulphosalts

Principal gangue minerał*

Ouortr, carbonates (mainty ankerite, dolomita and caldte)

Wall-rocK aiteratton

Chloriti/etion. ailidfication. seridtUetion, carbonati/ation. tourmalmi/ation, albłtiration.

and

tnopyriliiation

Australia

(Yilgam Błock}

In Kalgoorlie araa both nathre gold and gold telluridea. Moet of nathre gold in pyrito. Others aren: mainty nathre gold

Kalgoorlie araa: pyrito, galena, chalcopyrite, sphalerite, stibnite, arsenopyrite, tetrahodrite tennantite, realgar. In other mining d (stricte: pyr i te and pyrrhotite

ubiqułtous. Variable

chalcopyrite,

arsenopyrite

Kalgoorlie: quart2, carbonates. Other mining districts: dominantły quartz with minor carbonates in some

Dominantły

carbonatiration.

seridti/ation,

muscawiti/ation and

biatłtiration.

Pyriti/ation also

common

Zimbabwe

Mainty nathro gold but tellurides significant in some csses. Nathro gold commonty as indusions in suphides

Pyrito normally dominant. Pyrrhotite, chalkopyrite and galena usually present. Other sulphides in smali

Mainty quortz and lesser amounts of carbonates

Non stratabound; propytitic alteration and aericitłiation.

Strata bound: vartable style* of

alteration

L»mpa dobitfł* kresu żywotność?.