Log-uniform distribution of gold deposits along major Archean fault zones
| Autor: | Alain Cheilletz, Michel Jébrak, Jean-Jacques Royer, Olivier Rabeau |
|---|---|
| Přispěvatelé: | Université du Québec en Abitibi-Témiscamingue (UQAT), GeoRessources, Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL)-Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU)-Institut national des sciences de l'Univers (INSU - CNRS), Université du Québec à Montréal = University of Québec in Montréal (UQAM) |
| Rok vydání: | 2013 |
| Předmět: |
geography
Uniform distribution (continuous) geography.geographical_feature_category 010504 meteorology & atmospheric sciences Lithology Archean Geochemistry [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Fault (geology) 010502 geochemistry & geophysics Spatial distribution 01 natural sciences Mineral resource classification Geophysics Fault trace Geochemistry and Petrology Economic Geology Shear zone Geology 0105 earth and related environmental sciences |
| Zdroj: | Mineralium Deposita Mineralium Deposita, Spinger, 2013, 48 (7), pp.817-824. ⟨10.1007/s00126-013-0470-7⟩ |
| ISSN: | 1432-1866 0026-4598 |
| DOI: | 10.1007/s00126-013-0470-7 |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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