Relation between ore-forming hydrothermal systems and extensional deformation in the Solea graben spreading center, Troodos ophiolite, Cyprus

Article Abstract:

Crustal attenuation within the Solea graben was pre-dated by hydrothermal circulation and massive sulfide deposition. Epidosite strikes exist parallel to the graben's axis and to the extensional normal faults. Fluid flow was initally along microfractures and joints and the resulting low-angle fault zones. Gabrro intrusion into epidosite zones occured prior to and after major amagamatic extension. The results suggest that hydrothermal circulation was driven by the intrusions into the thin, highly deformed crust, which could recur along modern ridge crests characterized by temporary magmatism.

Cyprus, Rock deformation, Hydrothermal deposits

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Extensional collapse along the Sevier Desert reflection, northern Sevier Desert basin, western United States: reply

Article Abstract:

Mark H. Anders, Nicholas Christie-Blick and Stewart Wills have committed the mistake of misinterpreting multiples as primary stratal reflections in their criticism in this issue of the article 'Extensional collapse along the Sevier Desert reflection, northern Sevier Desert basin, western United States' by James C. Coogan and Peter G. DeCelles. In their comparison of two seismic reflection profiles across the western margin of the Sevier Desert basin, they have ignored the acquisition parameters of the two data sets and ignored the essential attributes of long-path multiples.

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Extensional collapse along the Sevier Desert reflection, northern Sevier Desert basin, western United States: comment

Article Abstract:

James C. Coogan and Peter G. DeCelles have contributed a wealth of welcome information to the controversy surrounding the Sevier Desert reflection with their article 'Extensional collapse along the Sevier Desert reflection, northern Sevier Desert basin, western United States.' An evaluation of the evidence and arguments presented by both authors on the nature of this subsurface feature deserves special attention because they directly relate to the issue of mechanical paradox of low-angle normal faults in tectonics.

United States

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