Studies in the geochemistry of gold--I The distribution of gold in rocks and minerals of the Skaergaard intrusion, East Greenland

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Gold has been determined by neutron activation analysis in a suite of rooks from the strongly differentiated Skaergaard gabbroic complex and in some of the constituent silicate, oxide and sulphide minerals. The chilled marginal gabbro (taken as representative of the initial magma) contains 0.0046 p.p.m. Au and with four exceptions all rocks and minerals analysed carry between half and twice this amount. The uncharged gold atom shows no preference for any one of the various silicate, oxide and iron sulphide minerals, but is very strongly concentrated in the copper sulphides, emphasizing the chemical similarity of the Cu and Au atoms rather than any general chalcophile tendency on the part of gold.

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