Knowledge-driven mineral potential modelling: applying the Mineral Systems Approach to the west Kimberley, Australia

Regional prospectivity analysis of the west Kimberley has been undertaken using the results of geophysical structural interpretation and the mineral systems approach (MSA) to mineral potential modelling. Ore deposits are small expressions of much larger Earth processes and systems focusing mass and energy flux at multiple scales. The MSA provides a framework within which metal sources, fluid transport mechanisms and traps can be recognised and represented by predictor maps. Predictor maps act as proxies for mineral system processes and include distance to a particular geological feature, locations of rheological and chemical contrast, structural complexity and location of mantle-tapping structures. The approach to mineral potential modelling taken here combines different predictor maps in a knowledge-driven inference framework order to identify likely zones of mineralisation. Nickel-sulphide analysis indicates that the Inglis Fault and Yampi Fold Belt localises areas of increased mineral potential. Carbonate-hosted base metal prospectivity is restricted to regions overlying basement highs in the Lennard Shelf. A buried NW extension of the Oscar Range interpreted from geophysics is identified as a region of high mineral potential. Gold potential is mostly associated with the Inglis Fault, the Yampi Fold Belt and the central portion of the King Leopold Orogen. The centre, west and east of the King Leopold Orogen and parts of the Yampi Fold Belt show small, but high, regions of mineral potential for stratiform-hosted base metal deposits. The northwest and east of the King Leopold Orogen show small regions of tin-tungsten mineral potential. Intrusion-related base metal mineral potential is restricted to the Wotjulum Porphyry in the Yampi Fold Belt and the northern central part of the King Leopold Orogen

Finding mineral potential in greenfields regions with structural geophysical interpretation, west Kimberley, Australia

The mineral potential of the greenfields west Kimberley region is investigated following structural interpretation of gravity and magnetic data. Special attention is given to identifying geological structures that reveal aspects of the regional geodynamic history. Structural domains have been delineated and related interpreted structures sorted into discrete events assigned to tectonic activity thought to have occurred within the study area. The interpreted structures characterise the spatial extent of tectonic activity and support an expanded view of the regional tectonic framework. Geophysical interpretation is depth constrained through joint forward modelling of gravity and magnetic modelling of three sections intersecting the area. Mantle-tapping structures critical to mineral potential mapping, such as those potentially reaching the Moho, are identified through structural interpretation and supported with section forward modelling. Crustal-scale structures are identified that separate regions of different geological and geophysical character and also control the formation of the oldest geological units. Mineral potential analysis of the west Kimberley has been undertaken using the results of regional-scale structural interpretation and modelling with a mineral systems approach. Several mineral systems are considered: 1) nickel-sulphide, 2) carbonate-hosted base metals, 3) orogenic gold, 4) stratiform-hosted base metals, 5) intrusion-related base metals (including tin-tungsten, iron-oxide-copper-gold and porphyry deposits). The resulting mineral potential maps reveal that spatial variations in geological characteristics considered favourable for each mineral system also indicate relative variations in prospectivity. Potential field geophysical data are shown to be effective for generating inputs for mineral potential modelling in greenfields regions through a combination of constrained structural geophysical interpretation and joint forward modelling. Importantly, potential field geophysical data allows the identification of deeper structures, and deeper mineral potential, that may otherwise not be observable at the surface

I Can't Believe It's Not Bakhtin!: Literary Theory, Postmodern Advertising and the Gender Agenda

Taking the literary theories of Mikhail Bakhtin as a starting point, the authors offer three gendered readings of a postmodern advertisement for Moët & Chandon champagne. They commence with a discussion of the influence of gender on textual interpretation; continue with an outline of Bakhtin's key concepts, with particular reference to gender; present three contrasting readings of Moët's postmodern advertisement; and conclude with a discussion of their interpretations together with some reflexive reflections on the gender agenda. Though not claiming to offer a comprehensive introduction to Bakhtin, they do try to exemplify, in a quasi-carnivalesque mode of exposition, something of the character of that supremely gifted thinker and to demonstrate the insights his concepts provide in relation to gendered readings of advertising texts