New insights into volcanic processes from deep mining of the southern diatreme within the Argyle lamproite pipe, Western Australia

Rayner, M.J.; Moss, S.; Lorenz, Volker; Jaques, A. L.; Boxer, G. L.; Smith, C. B.; Webb, Kimberley

doi:10.1007/s00710-018-0625-4

Cited by 5 publications

(5 citation statements)

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“…The ∼1,200 Ma Argyle lamproite and associated Lissadell Road and Seagull's dykes represent a small‐scale mantle melting event involving very limited and localized melt production. Emplacement of the Argyle lamproite into the Paleoproterozoic Halls Creek Orogen is inferred to have occurred during a period of extension associated with prominent large‐scale NNE‐trending strike‐slip faulting (Rayner et al., 2018). The ∼1,200 Ma age of the Argyle pipe coincides with a sharp bend in the apparent polar wander path for Australia at this time (Wingate & Evans, 2003) and the proposed separation of Australia from the Nuna supercontinent (Kirscher et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

“…The Bow Hill and Mad Gap Yards ultramafic lamprophyres have ages of 815 ± 20 Ma (Pidgeon et al., 1989) and 842 ± 8 Ma (Downes et al., 2023) respectively (Table 1). The Argyle lamproite is a large multiphase pipe (47 ha) composed of diamondiferous quartzose volcaniclastic olivine lamproite (predominantly lapilli tuff) and intruded by sparse olivine lamproite dykes (Jaques, 1986; Rayner et al., 2018). Mantle xenoliths of garnet lherzolite and Cr diopside xenocrysts are estimated to have equilibrated at 1050–1330°C and 4.8–6.1 GPa (Jaques et al., 1990, 2018; Luguet et al., 2009).…”

Section: Kimberley Craton—lamproite and Kimberlite Provincesmentioning

confidence: 99%

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Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia

Sudholz,

Jaques,

Yaxley

et al. 2023

Geochem Geophys Geosyst

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The lithology, geochemistry, and architecture of the continental lithospheric mantle (CLM) underlying the Kimberley Craton of north‐western Australia has been constrained using pressure‐temperature estimates and mineral compositions for >5,000 newly analyzed and published garnet and chrome (Cr) diopside mantle xenocrysts from 25 kimberlites and lamproites of Mesoproterozoic to Miocene age. Single‐grain Cr diopside paleogeotherms define lithospheric thicknesses of 200–250 km and fall along conductive geotherms corresponding to a surface heat flow of 37–40 mW/m2. Similar geotherms derived from Miocene and Mesoproterozoic intrusions indicate that the lithospheric architecture and thermal state of the CLM has remained stable since at least 1,000 Ma. The chemistry of xenocrysts defines a layered lithosphere with lithological and geochemical domains in the shallow (<100 km) and deep (>150 km) CLM, separated by a diopside‐depleted and seismically slow mid‐lithosphere discontinuity (100–150 km). The shallow CLM is comprised of Cr diopsides derived from depleted garnet‐poor and spinel‐bearing lherzolite that has been weakly metasomatized. This layer may represent an early (Meso to Neoarchean?) nucleus of the craton. The deep CLM is comprised of high Cr2O3 garnet lherzolite with lesser harzburgite, and eclogite. The peridotite components are inferred to have formed as residues of polybaric partial mantle melting in the Archean, whereas eclogite likely represents former oceanic crust accreted during Paleoproterozoic subduction. This deep CLM was metasomatized by H2O‐rich melts derived from subducted sediments and high‐temperature FeO‐TiO2 melts from the asthenosphere.

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Section: Discussionmentioning

confidence: 99%

Section: Kimberley Craton—lamproite and Kimberlite Provincesmentioning

confidence: 99%

Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia

Sudholz,

Jaques,

Yaxley

et al. 2023

Geochem Geophys Geosyst

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“…The Kimberley Craton in northern Western Australia is characterised by a diversity of 117 alkaline magmatism that includes kimberlite, lamproite, ultramafic lamprophyre and 118 carbonatite. The magmatism is mostly of Neoproterozoic age with the oldest being the 119 Mesoproterozoic (~1.2 Ga) diamondiferous Argyle lamproite in the East Kimberley (Jaques 120 et al 1986;Pidgeon et al 1989;Rayner et al 2018). However, it also includes early Triassic 121 (~ 235 and ~211 Ma) kimberlites in the North Kimberley region (Lithoquest 2019;Taylor 122 2008) and Ma) lamproites in the West Kimberley province (Jaques et al 123 1986;Phillips et al 2022).…”

Section: Response To Reviewersmentioning

confidence: 99%

Perovskite geochronology and petrogenesis of the Neoproterozoic Mad Gap Yards ultramafic lamprophyre dykes, East Kimberley region, Western Australia

Downes

Jaques

Talavera

et al. 2023

Contrib Mineral Petrol

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The Mad Gap Yards ultramafic lamprophyre (UML) dykes in the East Kimberley region of northern Western Australia form part of a widespread Neoproterozoic (~842-800 Ma) alkaline mafic-ultramafic magmatic province in the north, east and central regions of the Kimberley Craton of Western Australia. The NE-trending Mad Gap Yards dykes lie at the southeastern margin of the Kimberley Basin adjacent to the Greenvale Fault and intrude the Paleoproterozoic Elgee Siltstone. The dykes are classified as alnöite, and contain abundant macrocrystic olivine in a groundmass of phlogopite, perovskite, spinels, diopside, apatite, andradite-hydroandradite, serpentine, calcite, pseudomorphs after melilite and rare gittinsite. Mantle-derived olivine macrocrysts have compositions in the range Mg#91-92, similar to moderately refractory peridotite from other parts of the Kimberley Craton, whereas magmatic olivine phenocrysts have Mg#88-90. Olivine and chromian spinel were the earliest phenocrysts; they record equilibration temperatures of ~1030-920˚C under moderately reducing conditions with fO2 values below the fayalite-magnetite-quartz (FMQ) oxygen buffer (Δ FMQ = mostly -0.8 to -1.7 log units). Magnetite rims and groundmass grains crystallised at ~850-740˚C under more oxidising conditions with Δ FMQ ~+0.6 to -0.75 log units. Perovskite is well preserved in parts of the dykes and indicates crystallisation inside this fO2 range. The perovskite yielded a SHRIMP 206Pb/238U age of 842±8 Ma. The Mad Gap Yards dykes carry rare partially-altered spinel peridotite xenoliths containing olivine (Mg#86.3-90), Cr-diopside, enstatite and Al-Cr spinel, and well as

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“…The southern diatreme consists of unit SD-OL 1a (grey), a well-bedded to massive to chaotic pyrclastic olivine lamproite; unit SD-OL 2 (black), a massive to crudely bedded olivine and juvenile pyroclast poor olivine lamproite; unit SD-OL 1h (green), a bedded to well-bedded pyroclastic olivine lamproite, and; unit SD-OL 1b (yellow), a massive to chaotic textured pyroclastic olivine lamproite interpreted as feeder conduits or fragments thereof. After Rayner et al (2017Rayner et al ( , 2018b, with permission.…”

Section: Kjarsgaard Et Almentioning

confidence: 99%

A Review of the Geology of Global Diamond Mines and Deposits

Kjarsgaard

Wit

Heaman

et al. 2022

Reviews in Mineralogy and Geochemistry

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Kjarsgaard et al.A Review of the Geology of Global Diamond Mines and Deposits 3 Table 1. Mineralogy of kimberlite, carbonate-rich olivine lamproite (CROL), and olivine lamproite. Minerals present Kimberlite Carbonate-rich olivine lamproite (CROL) Olivine lamproite Megacryst suite (> 1 cm) Common to absent Absent, rare Absent, ?very rare? Cognate and antecryst minerals Olivine Common to absent Rare to absent Rare to absent Phlogopite Minor to absent Common to minor Common, minor, rare Spinel Common to rare (spinel cores) Minor to absent (spinel cores) Minor to absent (spinel cores) Diopside Absent Rare to absent Rare to absent (Minor) Phenocryst /Microphenocrysts (0.2-1.0 mm) Olivine phenocrysts Common Common Common Olivine microphenocrysts Common Minor to rare Minor to rare Phlogopite phenocrysts Minor, rare, absent Common Common Phlogopite microphenocrysts Minor, rare (poikilitic) Common Common (poikilitic) Spinel phenocrysts Common to minor Minor to rare Minor to rare Diopside microphenocrysts Absent Variable: Common to absent Minor to absent Groundmass (<0.2 mm) Olivine Common Minor to rare Rare, absent Phlogopite Common, laths (poikilitic) Common (poikilitic) Common (poikilitic) Spinel Common to minor Minor to rare Minor to rare Glass Absent, exceptionally rare? Absent (not reported) Common, minor, rare Apatite Common to rare Common to minor Minor to rare Perovskite Common to minor, rare Minor to rare Minor to rare Carbonate (calcite, dolomite) Common to minor Common to minor Rare, absent

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New insights into volcanic processes from deep mining of the southern diatreme within the Argyle lamproite pipe, Western Australia

Cited by 5 publications

References 21 publications

Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia

Mapping the Structure and Metasomatic Enrichment of the Lithospheric Mantle Beneath the Kimberley Craton, Western Australia

Perovskite geochronology and petrogenesis of the Neoproterozoic Mad Gap Yards ultramafic lamprophyre dykes, East Kimberley region, Western Australia

A Review of the Geology of Global Diamond Mines and Deposits

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