Re-Os isotopic evidence for Archean lithospheric mantle beneath the Kimberley block, Western Australia

Graham, Sonia; Lambert, David D; Shee, S. R.; Smith, C. B.; Reeves, Shane

doi:10.1130/0091-7613(1999)027<0431:roiefa>2.3.co;2

Cited by 58 publications

(44 citation statements)

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“…MLD depths with no evidence for significantly juvenile underplates or voluminous metasomatism that could cause a large change in Mg# (Graham et al, 1999;Griffin et al, 2004;Richardson et al, 2001). Mantle xenoliths therefore do not support a change in Mg# as the MLD cause.…”

Section: Option 1: Change In Mg#mentioning

confidence: 79%

The seismic mid-lithosphere discontinuity

Selway

Ford

Kelemen

2015

Earth and Planetary Science Letters

199

252

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Section: Option 1: Change In Mg#mentioning

confidence: 79%

The seismic mid-lithosphere discontinuity

Selway

Ford

Kelemen

2015

Earth and Planetary Science Letters

199

252

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“…Luguet et al (2009) recently reported Neoto Mesoarchaean T RD ages for lherzolite xenoliths from Argyle, which indicates that ancient lithospheric mantle extends beneath the entire Kimberley region. This is also supported by low initial Nd isotope ratios (e Nd $ À3 at the isochron age of 1.58 ± 0.06 Ga) of silicate inclusions in diamonds and lherzolite xenoliths from Argyle (Richardson, 1986;Graham et al, 1999).…”

Section: Age Of the Sclm Beneath The King Leopold Orogenmentioning

confidence: 64%

“…The peridotitic sulphide inclusions from Ellendale have Re/Os ratios significantly higher (with lower Os concentration) than the extensive harzburgitic sulphide inclusion suite at Panda (Westerlund et al, 2006) and show strong similarity to those of lherzolitic xenoliths from both Udachnaya (Pearson et al, 1995a,b) and Argyle (Graham et al, 1999;Luguet et al, 2009) (Fig. 3), as well as the (hypothetical) primitive upper mantle (PUM) composition determined by Meisel et al (2001).…”

Section: Re and Os Concentrationsmentioning

confidence: 81%

“…Complementing the seismic evidence, cool cratonic geotherms have been established for the West Kimberley (Griffin and Ryan, 1995), East Kimberley and North Kimberley provinces (Griffin and Ryan, 1995;Wyatt et al, 1999). Xenolith studies from the Kimberley area (including Argyle as well the Seppelt kimberlite intruded into the northern Kimberley craton) have shown that the SCLM is largely lherzolitic in composition (with minor harzburgite component) and was stabilised in the Archaean (Jaques et al, , 1989Lucas et al, 1989;Ramsay et al, 1994;Smith et al, 1994;Griffin and Ryan, 1995;Graham et al, 1999;Wyatt et al, 1999;Downes et al, 2007;Luguet et al, 2009).…”

Section: Regional Geologymentioning

confidence: 95%

“…Eclogite xenoliths-Udachnaya (Pearson et al, 1995a,b). Lherzolite xenoliths-Udachnaya (Pearson et al, 1995a,b); Argyle (Graham et al, 1999;Luguet et al, 2009). Harzburgite xenoliths-Panda (Westerlund et al, 2006).…”

Section: Re and Os Concentrationsmentioning

confidence: 98%

See 2 more Smart Citations

Re–Os isotopic composition of peridotitic sulphide inclusions in diamonds from Ellendale, Australia: Age constraints on Kimberley cratonic lithosphere

Smit

Shirey

Richardson

et al. 2010

Geochimica et Cosmochimica Acta

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The 187Re-187Os and 190Pt-186Os Radiogenic Isotope Systems: Techniques and Applications to Metallogenic Systems

Norman

2023

Mineral Resource Reviews

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Rhenium, Os, and Pt are redox sensitive elements that are concentrated in highly reducing environments such as those associated with black shales but mobile under more oxidizing conditions such as those associated with arc volcanism. They are chalcophile in many terrestrial ore-forming environments, and their isotopic systematics provide unique opportunities to date the formation of sulfide ore deposits and understand their petrogenesis. Fractional crystallization of magmatic sulfide ores generates primary variations in Re/Os and Pt/Os that allow mineral and whole rock isochron ages to be determined and discrimination of crustal and mantle sources based on initial Os isotopic compositions. Molybdenite is especially well suited for geochronology due to its high Re/Os and resistance to resetting. Rhenium concentrations in molybdenite tend to reflect the composition or provenance of the ore-forming fluids, with higher concentrations associated with more primitive sources or more oxidized fluids and lower concentrations with more evolved and/or reduced conditions, although local and regional factors also have a significant influence. Many studies have used pyrite for dating but its typically low Re concentration, variable initial Os isotopic composition (reflecting fluid mxing), and susceptibility to re-equilibration makes its use as a geochronometer problematic in many cases. Other sulfide minerals such as bornite and arsenopyrite have shown promise for Re–Os isotope geochronology but additional studies are needed to evaluate their broader applicability for dating of ore deposits. The isobaric beta decay of parent isotope 187Re to 187Os has restricted investigation of this system by microbeam techniques such as ion microprobe or laser ablation mass spectrometry, especially for geochronology. This requires either chemically processing the sample to separate the elements or novel techniques such as collision-cells that preferentially ionize the Re and Os during the analysis. Thermal ionization mass spectrometry (TIMS) and inductively-coupled plasma mass spectrometry (ICPMS) are the most widely applied techniques for Re-Pt-Os isotopic analyses. Specialized techniques for sample digestion to ensure redox equilibrium between Os in the sample and the isotopically enriched spikes used for isotope dilution measurements are typically required. This chapter briefly reviews development of the 187Re-187Os and 190Pt-186Os isotopic systems for earth science, physico-chemical controls on their behavior in ore-forming environments, and applications to metallogenic systems.

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Re-Os isotopic evidence for Archean lithospheric mantle beneath the Kimberley block, Western Australia

Cited by 58 publications

References 0 publications

The seismic mid-lithosphere discontinuity

The seismic mid-lithosphere discontinuity

Re–Os isotopic composition of peridotitic sulphide inclusions in diamonds from Ellendale, Australia: Age constraints on Kimberley cratonic lithosphere

The 187Re-187Os and 190Pt-186Os Radiogenic Isotope Systems: Techniques and Applications to Metallogenic Systems

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