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Copper belongs to those metals whose concentrations in nature arise
from a broad diversity of endogeneous and exogeneous pro- cesses,
which applies to essentially all genetic classes of ore deposits.
This is the first proceedings volume on copper metallogeny to cover
the worldwide distribution of the four main groups of cop- per
deposits, including in Part I: copper-nickel deposits with cobalt
and platinum group elements; Part II: copper-molybde- num-gold
deposits with silver, zinc, and lead; Part III/IV: copper-
zinc-lead deposits (with silver etc.). On the occasion of the 27th
International Geological Congress in Moscow, USSR, a symposium on
copper metallogeny was held, dealing with metallogenesis and
mineral deposits. The symposium was organized and sponsored by
three international societies en- gaged in the field of ore
deposits: The Society of Economic Geol- ogy (SEG), the Society of
Geology Applied to Mineral Deposits (SGA) and the International
Association on the Genesis of Ore Deposits (IAGOD). Invited papers
were presented in four ses- sions: (1) Copper deposits in mafic and
ultramafic complexes, (2) Porphyry copper deposits, (3) Copper
deposits of volcanic-hydro- thermal association, and (4)
Sediment-hosted copper deposits. The sessions were chaired by A. D.
Genkin, A. J. Naldrett, J. D. Ridge and G. I. Gorbunov; V.1.
Sotnikov, A. Soregaroli, R. H. Sillitoe and V. A. Evstrakhin; F. M.
Vokes, A.1. Krivtsov, M. Solomon and N. I. Eremin; G. H. Friedrich,
Yu. V. Bogdanov, A.C. Brown and F.P. Krendelev.
PGE V-Voisey's Bay (Canada) D -Duluth Complex (USA) K-Kambalda
(Australia) M-Merensky Reef (Bushveld) N -Noril'sk region (Russia)
P-Pechenga(Russia) S-Sudbury (Canada) T-Thompson (Canada) J
-Jinchuan (China) L-Lac des lies (Canada) PR-Platreef (Bushveld)
Po-Portimo Complex (Finland) R-Raglan (Canada) U-UG-2 chromitite
(Bushveld) Z-Great Dyke of Zimbabwe e-Mt Keith (Australia) . a.
-Perseverance (Australia) +-Stillwater (USA) 0 0 0 'c9 -~ Ni+Co Cu
Relative value of Ni+Co Fig. 1. 1. Relative va1ue of the
contributions of Ni+Co, Cu and PGE to the mag- matic su1fide
deposits listed in Table 1. 1 sulfide deposits are closely related
to bodies of mafic or ultramafic rock, and the most convenient way
in which to consider them is in terms of the type of magma
responsible for the rocks with which they are associated. Typically
the type of magma involved bears a close relationship to the tec-
tonic setting within which it was emplaced. The locations of
important deposits, both Ni-Cu dominant and PGE dominant, are shown
in Fig. 1. 2. Considering first Ni-Cu deposits, these are further
divided into six classes (Table 1. 2) on the basis of their
associated magma type. Class NC- 1 (Chap. 3) comprises those
related to komatiitic magmatism. Currently known deposits fall into
two sub-classes, those related to Archean komatiites ( e. g. the
deposits of Western Australia, Zimbabwe and the Abitibi belt of
Canada) and those related to Proterozoic komatiites (e. g. those
ofthe Raglau and Thompson belts which arebothin Canada)l.
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