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Article Dans Une Revue Mineralium Deposita Année : 2013

Log-uniform distribution of gold deposits along major Archean fault zones

Résumé

The location of potentially unrecognized gold deposits in the close vicinity of the Cadillac-Larder Lake Fault Zone in the Archean Abitibi Subprovince (Canada) is predicted by applying a stochastic approach to the distribution of known gold deposits. The methodology uses the distances between neighboring orogenic gold deposits along the fault trace. The cumulative distribution of the curvilinear inter-distances along the fault zone, are adequately represented by a log-uniform model. The average inter-distance is 1.95 km, and an upper inter-distance of 5.6 km is observed. The same distribution pattern appears along the Destor-Porcupine Fault Zone (Abitibi). This log-uniform distribution shows that the spatial distribution of gold deposits is regionally controlled by the major crustal shear zone. Lithologies and structures only seem to exert a local influence at the deposit scale. The log-uniform spacing could be interpreted as the result of the crustal failure locations induced by hydraulic overpressure along mechanically independent segments on the main fault.

Dates et versions

hal-01303026 , version 1 (15-04-2016)

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O. Rabeau, J. J. Royer, M. Jebrak, A. Cheilletz. Log-uniform distribution of gold deposits along major Archean fault zones. Mineralium Deposita, 2013, 48 (7), pp.817-824. ⟨10.1007/s00126-013-0470-7⟩. ⟨hal-01303026⟩
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