3D structural modelling and implications for targeting gold mineralisation in western Victoria

Crustal architecture of central Victoria: results from the 2006 deep crustal reflection seismic survey

“…Deep water Cambrian sedimentary rocks and rift-related tholeiites of this succession extend east into far western Victoria as the Glenelg and Grampians-Stavely Zones. These rocks are, in most places, likely to be underlain at quite shallow depth by thinned Precambrian continental crust (Flö ttmann et al 1994;VandenBerg et al 2000;Morand et al 2003;Murphy et al 2006). In South Australia, deformation and metamorphism of the Delamerian Orogen may have begun in the Neoproterozoic (Turner et al 2009), but in Victoria this event commenced in the Cambrian (Preiss 1995;VandenBerg et al 2000).…”

“…The Grampians-Stavely Zone presumably marked a transition, in the Cambrian, from the Delamerian inverted passive-margin succession to the west, to more oceanic crust of the paleo-Pacific ocean of the proto-Lachlan Orogen farther east. It may even represent a Cambrian arc and forearc complex (oceanic and forearc rocks of the Dimboola Igneous Complex; Finn et al 1999;VandenBerg et al 2000), but it seems likely that today it is mostly underlain by thick Proterozoic continental crust (Murphy et al 2006). The Mount Stavely Volcanic Group has a similar age and chemistry to the Mount Read Volcanics of Tasmania, and may share a common post-collisional continental rift (Crawford et al 1996(Crawford et al , 2003 or continental arc setting, related to Late Cambrian convergent margin deformation.…”

“…The Mount Stavely Volcanic Group has a similar age and chemistry to the Mount Read Volcanics of Tasmania, and may share a common post-collisional continental rift (Crawford et al 1996(Crawford et al , 2003 or continental arc setting, related to Late Cambrian convergent margin deformation. Major deformation in the Delamerian Orogeny (Middle to Late Cambrian *520-490 Ma) also involved the westerly emplacement of extensive fault slices of mafic igneous material, possibly as ophiolites (Murphy et al 2006), and widespread syn-and post-tectonic magmatism. The timing of this deformation is well constrained by the post-tectonic Bushy Creek Granodiorite, which is Late Cambrian (magmatic zircon Pb-U age of 489 + 7 Ma; Stuart-Smith & Black 1999).…”

Reflection seismic imaging of the upper crust in the Kristineberg mining area, northern Sweden

“…To be successful in exploration, a better understanding of geological structures and the evolution of the Kristineberg mining area is necessary. Several studies have shown that geophysical methods, such as seismic, electromagnetic and potential field data (gravity and magnetic) can provide important information for the interpretation of geological structures hosting mineral deposits (e.g., Roy and Clowes, 2000;Goleby et al, 2002;Martelet et al, 2004;Malehmir et al, 2006;Murphy et al, 2006;Malehmir et al, 2007). Reflection seismics have the potential to aid mineral exploration either by directly imaging mineral deposits at depth (Milkereit et al, 2000;Malehmir and Bellefleur, 2009) or by defining faults and structures that control or host mineral deposits (Li and Calvert, 1997;Roberts et al, 2003).…”

Constraints on the geometry of the Suasselkä post-glacial fault, northern Finland, based on reflection seismic imaging

“…Knowledge of the fault geometry is important for understanding the stress that was required to activate the PG faults during the last deglaciation and also for predictions of potential future earthquakes along these faults. Aside from providing geometrical information on the faults, seismic reflection surveying can image other geological features in the vicinity of the faults such as contacts of lithological units and provide information on the structural style (e.g., Goleby et al, 2002;Malehmir et al, 2006;Malehmir et al, 2007;Martelet et al, 2004;Murphy et al, 2006;Roy and Clowes, 2000).…”