... emplacement and Au-Cu ore formation at Ok Tedi, the Earth’s youngest giant porphyry-skarn deposit. Trace element contents in zircons were obtained by laser ablation-inductively coupled plasma-mass spectrometry before selected grains were removed from the sample mount, chemically abraded, spiked, and dissolved...

...Michiel Van Dongen; Roberto F. Weinberg; Andrew G. Tomkins Abstract The Ok Tedi porphyry Cu-Au deposit in Papua New Guinea is a world-class mineral deposit. In its pre-mining stage, it contained 5.5 Mt Cu and 18.1 Moz Au; skarn accounts for ~80% of the current 1.9 Mt Cu and 7.7 Moz Au in total...

... observations at Ok Tedi imply a “very different picture of the relationships between intrusive rocks, host rocks, and mineralization” than the one we proposed. We would argue that his observations are actually broadly consistent with our model, but our interpretation was more concerned with the deposit-scale...

... and their alteration, Mt Fubilan porphyry copper deposit : Geological Survey of Papua New Guinea, Report 77/5 , 10 p. Arnold G.O. Griffin T. J. Hodge C.C. , 1979 , Geology of the Ok Tedi and southern Atbalmin 1:100000 sheet: Part 3, Igneous rocks and structure : Geological Survey of Papua New...

... the skarn-focused discovery and early production history of the deposit, as well as the presence of several large skarn deposits within the district. The Ok Tedi Cu-Au-Ag deposit of western Papua New Guinea also is generally thought of as a major porphyry Cu deposit, yet hosts both porphyry and skarn...

... affinities are with the deposits in nearby island arcs, then the reason must be found in the existence of some other factor, which might be purely geographical. Furthermore the New Guinea porphyrys, and particularly Ok Tedi, which has been dated at 1·1Ma present difficulties for any theory which proposes...

... engineering feasibility studies began in 1978. Subsequent terrain hazard mapping has identified numerous landslides and rock avalanche deposits in the Ok Tedi catchment and in the immediate vicinity of the mine, ranging from very low frequency, catastrophic rock avalanches through to mudslides and mudflows...

... processes, or a combination of both. We investigated whole-rock trace-element and REE patterns of samples from the giant Ok Tedi porphyry copper-gold deposit, Papua New Guinea, and found that REEs were most depleted in zones of greatest hydrothermal alteration. REE-rich accessory phases zircon, apatite...

... saturated porous media and chemical fluid-rock interactions incorporating mineral dissolution kinetics. Field and laboratory analytic and mineralogic data from supergene enrichment systems at Butte, Montana, and Ok Tedi, located in western Papua New Guinea, are used to provide geochemical, lithologic...

...H. L. Davies; W. J. S. Howell; R. S. H. Fardon; R. J. Carter; E. D. Bumstead Abstract The Ok Tedi porphyry copper-gold deposit in western Papua New Guinea was discovered and tested by a subsidiary of Kennecott Copper Corporation in 1968-1971. Exploration lapsed in 1972-1975 while Kennecott...

... of the Mount Fubilan (Ok Tedi) porphyry copper deposit show a time gap of 1.5 m.y. between initial magmatic emplacement (2.6 m.y.) and subsequent copper mineralization (1.1 m.y.) associated with the Fubilan porphyries. Comparison of the ages of mineralized porphyries in the Star Mountains Intrusives (3.4...