Synthesis of the proterozoic evolution of the Mt Isa Inlier

Betts, Peter Graham; Giles, David; Mark, Geordie; Lister, Gordon; Goleby, B. R.; Aillères, Laurent

doi:10.1080/08120090500434625

Cited by 124 publications

(73 citation statements)

References 148 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Mount Isa lead-zinc-silver and copper deposits are located in the Mount Isa Inlier, an inverted and metamorphosed Proterozoic intra-continental rift (Betts et al 2006) in NorthWest Queensland, Australia (Fig. 3).…”

Section: Geological Backgroundmentioning

confidence: 99%

Coupled Models of Brittle-plastic Deformation and Fluid Flow: Approaches, Methods, and Application to Mesoproterozoic Mineralisation at Mount Isa, Australia

Gessner

2009

Surv Geophys

View full text Add to dashboard Cite

Rock deformation has an important effect on the spatial distribution and temporal evolution of permeability in the Earth's crust. Hydromechanical coupling is of fundamental significance to natural fluid-rock interaction in porous and fractured hydrothermal systems, and in the assessment and production of hydrocarbon resources and geothermal energy. Shearing and fracturing of rocks can lead to the creation or destruction of permeability when fractures or faults form, or when existing structures are reactivated. Changes in stress orientation or fluid pressure can drive rock failure and create dilating fault zones that have the potential to focus fluid flow, or to breach seals above overpressured fluid compartments. Here, numerical models of deformation and fluid flow related to Mesoproterozoic copper mineralisation at Mount Isa, Australia, are presented that show how changes in deformation geometry in multiply deformed geological architectures relate to changes in dilation patterns, fluid pathways and flow geometry. Coupled numerical simulations of deformation and fluid flow can be useful tools to better understand structural control on fluid flow in hydrothermal mineral systems.

show abstract

Section: Geological Backgroundmentioning

confidence: 99%

Coupled Models of Brittle-plastic Deformation and Fluid Flow: Approaches, Methods, and Application to Mesoproterozoic Mineralisation at Mount Isa, Australia

Gessner

2009

Surv Geophys

View full text Add to dashboard Cite

show abstract

“…Silver-lead-zinc mineralisation within Mount Isa Inlier is primarily associated with sedimentation and basin 32 extension (ca. 1670 -1610 Ma) (Chapman, 2004, Betts et al, 2006. During the deposition and subsequent diagenesis of successions of Isa Superbasins aged between 1670 and 1610 Ma, alteration products were produced and characterised by low to moderate temperature (< 300 ºC) fluid flow and metasomatism involving the circulation of basinal and surface-derived brines along large growth faults (Betts et al, 2006, Chapman, 2004, Betts et al, 2003, Cooke et al, 2000.…”

Section: Geologymentioning

confidence: 99%

“…1740 Ma to 51350 Ma preserved at Mount Isa Inlier (Betts et al, 2006). (Betts et al, 2006). Silver-lead-zinc mineralisation within Mount Isa Inlier is primarily associated with sedimentation and basin 32 extension (ca.…”

Section: Geologymentioning

confidence: 99%

“…Regionally the Mount Isa Inlier is enriched in a variety of ore deposits, including the Mount Isa silver-lead-zinc and copper deposits, Century silver-lead-zinc deposit, Cannington silver-lead-zinc deposit, and the Osborne and Ernest Henry iron oxide copper-gold deposits (Betts et al, 2006, Spikings et al, 2001, Oliver, 1995. The Mount Isa group includes Magazine Shale, Kennedy…”

Section: Geologymentioning

confidence: 99%

“…There has been evidence for at least four episodes of extensive hydrothermal alteration over a protracted period from ca. 1740 Ma to 51350 Ma preserved at Mount Isa Inlier (Betts et al, 2006). (Betts et al, 2006).…”

Section: Geologymentioning

confidence: 99%

See 2 more Smart Citations

Lead from mining and mineral processing activities to the community via the air-dust pathway: An example from Mount Isa city using human health risk assessment approach

Zheng¹

View full text Add to dashboard Cite

This study followed the Australian human health risk assessment procedure from enHealth and utilised an innovative approach of integrated methodologies to study the impacts of lead on the Mount Isa community. The aim of this study was to identify the significant sources of lead via the air-dust pathway at Mount Isa and to estimate the potential impact of the air-dust pathway on human health by using a human health risk assessment approach. The two research questions derived from aims were related to the "issue identification" "hazard assessment" "exposure assessment" and "risk characterisation" of the risk assessment procedure.The first research question considered if lead-containing particulates were dispersed from mining operations via air-dust pathway to the community using a statistically representative set of houses in the Mount Isa City (n=67) to examine the spatial distribution of chemical and physical characteristics, including heavy metal and metalloid total concentrations, lead isotopic feature of the potential sources associated with historical mining and mineral processing activities. High resolution lead isotope ratios for natural outcrops, mine site samples, community samples indicated that roof gutter dust, fallout dust, soil PM 10 , and outdoor air particulates, floor, interior window sill, window trough, veranda wipe and indoor carpet dust showed close feature to lead isotopic characteristics of the mine site lead ore samples (mean 208 showed that Urquhart Shale outcrops were not significantly different (p > 0.05) from the mine site haul road dust (p = 0.89) and surface tailings (p = 0.36) and dust from the city residential area roof gutter dust (p = 0.06) and window trough wipes (p = 0.37) for lead isotopic ratios.The second research question of evaluating the significant lead exposure route was answered by considering if lead-containing particulates at Mount Isa were a significant lead exposure source via inhalation and ingestion routes in the community regarding human health exposure assessment.Total concentrations of lead in soil, air particulates, house wipes were compared with Australian and international health risk guidelines. Lead speciation by synchrotron-based X-ray absorption spectroscopy using X-ray absorption near edge structure (XANES) technique and bioaccessibility of lead in samples using the physiologically-based extraction test (

show abstract