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- W2092031964 abstract "The Dest-Or epigenetic Au deposit occurs in a breccia zone within gabbro, basalt and andesite of the Archean Upper Deguisier Formation. It is located approximately 30 km NE of Noranda. Quebec and 2.5 km N of the Porcupine-Destor Fault, an important vertical shear zone that extends east-west for more than 100 km. The known orebody contains 2.44 Mt of ore at 4.29 g/t Au. Host rocks of the Upper Deguisier Formation typically contain 3.6 ppb Au, 0.8 ppm Sb and 4.5 ppm As. The Au values are comparable to those of tholeiitic mafic rocks elsewhere in the world. but Sb and As values are a little higher. Gold values on approximately 30% of the area of the Dest-Or and Bassignac properties define a log-normal distribution with a median at 9.4 ppb Au (P 16 at 3.1 and P 84 at 27). These are referred to as ore zone halos : they envelop orebody halos which in turn envelop orebodies. An orebody halo can best be defined by close sampling in the immediate vicinity of a known orebody. Around the Dest-Or orebody, this halo is approximately 100 m wide (60 m on the hanging wall and 40 m on the footwall), and it has a median value at 37 ppb Au (P 16 at 17 and P 84 at 74). Gold enrichment in the orebody is 1900 times background value. There are also lesser but significant Sb and As enrichments (20 /sX each). High W values occur in the ore ( > 30 ppm W), but background values were too low ( <5 ppm) to be established with confidence. Gold analyses in the 0.2–100 ppb range can be gainfully used in the search for blind gold ore deposits: As, Sb and W can also be used, but anomalies are less extensive and enrichment is also less pronounced." @default.
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- W2092031964 date "1987-06-01" @default.
- W2092031964 modified "2023-09-26" @default.
- W2092031964 title "Distribution of gold, arsenic, antimony and tungsten around the Dest-Or Orebody, Noranda district, Abitibi, Quebec" @default.
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- W2092031964 doi "https://doi.org/10.1016/0375-6742(87)90039-2" @default.
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