Timing and Structural Controls on Gold Mineralization at the Bogoso Gold Mine, Ghana, West Africa

Allibone, Andrew; Teasdale, Jonathan; Cameron, Greg; Etheridge, Mike; Uttley, Phillip J.; Soboh, Albert; Appiah-Kubi, John; Adanu, Alan; Arthur, R.J.; Mamphey, Jo; Odoom, Ben; Zuta, John; Tsikata, Amegbor; Pataye, Frederick; Famiyeh, Sammuel; Lamb, Eddie

doi:10.2113/gsecongeo.97.5.949

Cited by 108 publications

(40 citation statements)

References 18 publications

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“…The deposits along the Ashanti fault zone occur: (i) as steep quartz veins in shear zones within Birimian or Tarkwaian metasediments; (ii) as sulfide ores that are spatially associated with quartz veins; and (iii) as a disseminated and stockwork mineralization in granitoid (Oberthür et al 1998;Allibone et al 2002a). Possible spatial and temporal relationships between mineralization and presence of granitoids are described in several earlier studies (Oberthür et al 1998;Yao et al 2001;Feybesse et al 2006).…”

Section: The Ashanti Mineralizationmentioning

confidence: 92%

“… Simplified map of the square box in Fig. 1B), illustrating the location of major faults and showing the increase in fault density from west to east in the Ashanti region (based on Allibone et al. 2002a).…”

Section: The Ashanti Mineralizationmentioning

confidence: 99%

Section: The Ashanti Mineralizationmentioning

confidence: 99%

“…Along its 250 km length, the fault density increases from west to east. Indeed, Birimian rocks are cut by several minor faults (Buesichem and Ablifa faults) in the west, whereas eastward major faults dominate and merge within the so-called 'central fault zone' (Allibone et al 2002a). Based on these observations, the Ashanti fault is assumed to be characterized by a lateral permeability gradient ( Fig.…”

Section: The Ashanti Mineralizationmentioning

confidence: 99%

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Hydrothermal convection in and around mineralized fault zones: insights from two‐ and three‐dimensional numerical modeling applied to the Ashanti belt, Ghana

Harcouët-Menou¹,

Guillou-Frottier²,

Bonneville³

et al. 2009

Geofluids

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Section: The Ashanti Mineralizationmentioning

confidence: 92%

Section: The Ashanti Mineralizationmentioning

confidence: 99%

Section: The Ashanti Mineralizationmentioning

confidence: 99%

Section: The Ashanti Mineralizationmentioning

confidence: 99%

See 2 more Smart Citations

Hydrothermal convection in and around mineralized fault zones: insights from two‐ and three‐dimensional numerical modeling applied to the Ashanti belt, Ghana

Harcouët-Menou¹,

Guillou-Frottier²,

Bonneville³

et al. 2009

Geofluids

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show abstract

“…To the extent that the Mohr-Coulomb rheology is realistic (e.g. , this result challenges some approaches to prospectivity that focus on releasing geometries, and also helps to explain the location of ore bodies in both releasing and restraining bends ⁄ jogs (Allibone et al 2002b).…”

Section: Discussionmentioning

confidence: 99%

Factors affecting fluid flow in strike–slip fault systems: coupled deformation and fluid flow modelling with application to the western Mount Isa Inlier, Australia

Ford¹,

Blenkinsop²,

McLellan³

2009

Geofluids

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Deformation and focused fluid flow within a mineralized system are critical in the genesis of hydrothermal ore deposits. Dilation and integrated fluid flux due to coupled deformation and fluid flow in simple strike-slip fault geometries were examined using finite difference analysis in three dimensions. A series of generic fault bend and fault jog geometries consistent with those seen in the western Mount Isa Inlier were modelled in order to understand how fault geometry parameters influence the dilation and integrated fluid flux. Fault dip, fault width, bend ⁄ jog angle, and length were varied, and a cross-cutting fault and contrasting rock types were included. The results demonstrate that low fault dips, the presence of contrasts in rock type, and wide faults produce highest dilation and integrated fluid flux values. Increasing fault bend lengths and angles increases dilation and integrated fluid flux, but increasing fault jog length or angle has the opposite effect. There is minimal difference between the outputs from the releasing and restraining fault bend and jog geometries. Model characteristics producing greater fluid flows and ⁄ or gradients can be used in a predictive capacity in order to focus exploration on regions with more favorable fault geometries, provided that the mineralized rocks had Mohr-Coulomb rheologies similar to the ones used in the models.

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Structural Setting of Western Mali Insights from Magnetic Data Analysis

Koné

Nasr

Belkheria³

et al. 2019

On Significant Applications of Geophysical Methods

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Timing and Structural Controls on Gold Mineralization at the Bogoso Gold Mine, Ghana, West Africa

Cited by 108 publications

References 18 publications

Hydrothermal convection in and around mineralized fault zones: insights from two‐ and three‐dimensional numerical modeling applied to the Ashanti belt, Ghana

Hydrothermal convection in and around mineralized fault zones: insights from two‐ and three‐dimensional numerical modeling applied to the Ashanti belt, Ghana

Factors affecting fluid flow in strike–slip fault systems: coupled deformation and fluid flow modelling with application to the western Mount Isa Inlier, Australia

Structural Setting of Western Mali Insights from Magnetic Data Analysis

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