Selected trace and minor element partitioning between peridotite minerals and carbonatite melts at 18–46 kb pressure

Sweeney, R.J.; Prozesky, V.M.; Przybyłowicz, W.J.

doi:10.1016/0016-7037(95)00270-a

Cited by 122 publications

(61 citation statements)

References 34 publications

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“…2). Our results show trace element distribution between CAKP Cpx and CMI similar to high P-T experimental results (e.g., Green et al, 1992;Klemme et al, 1995;Sweeney et al, 1995;Blundy and Dalton, 2000) (Figs. 6 and 7).…”

Section: Effects Of Carbonatite Melt Metasomatismsupporting

confidence: 85%

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LA-ICP-MS study of apatite- and K feldspar-hosted primary carbonatite melt inclusions in clinopyroxenite xenoliths from lamprophyres, Hungary: Implications for significance of carbonatite melts in the Earth’s mantle

Guzmics

Zajacz

Kodolányi

et al. 2008

Geochimica et Cosmochimica Acta

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Section: Effects Of Carbonatite Melt Metasomatismsupporting

confidence: 85%

“…Despite the fact that in clinopyroxene, equilibrated with carbonatite melt, at high pressure HREE are more compatible than LREE (e.g., Green et al, 1992;Klemme et al, 1995;Sweeney et al, 1995), the studied CAKP clinopyroxenes show strong enrichment in LREE relative to HREE ( Fig. 2A).…”

Section: Effects Of Carbonatite Melt Metasomatismmentioning

confidence: 85%

LA-ICP-MS study of apatite- and K feldspar-hosted primary carbonatite melt inclusions in clinopyroxenite xenoliths from lamprophyres, Hungary: Implications for significance of carbonatite melts in the Earth’s mantle

Guzmics

Zajacz

Kodolányi

et al. 2008

Geochimica et Cosmochimica Acta

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“…The preservation of ultra-radiogenic Hf isotopes in clinopyroxenes from Montboissier, Puy de la Halle and Fraisse (northern FMC) despite substantial enrichments in light REE and LILE trace element abundances accompanied by overprinting of Pb-Nd-Sr isotopes is consistent with metasomatism by a hydrous and/or carbonatite-dominated agent. Such fluids have high mineral/hydrous-carbonatitic fluid partition coefficients for heavy REE and HFSE (Klemme et al, 1995;Sweeney et al, 1995). Thus, Lu and Hf concentrations are low in hydrous and carbonatitic liquids and, by inference, also in mantle enriched by these agents.…”

Section: Nature and Timing Of Metasomatic Processes In Fmc Mantlementioning

confidence: 94%

U–Th–Pb and Lu–Hf isotopic constraints on the evolution of sub-continental lithospheric mantle, French Massif Central

Wittig

Baker

Downes

2007

Geochimica et Cosmochimica Acta

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“…citations from figure and table captions Corgne and Wood, 2002;Dalou et al, 2009;Hirose et al, 2004;Taura et al, 2001;Walter et al, 2004) (Adam and Green, 2001;Bulanova et al, 2010;Davies et al, 2004b;Hutchison, 1997;Kaminsky et al, 2001;Kelemen et al, 2003;Moore et al, 1991;Stachel et al, 2000a;Sweeney et al, 1995;Tappert et al, 2005) …”

Section: Acknowledgementsmentioning

confidence: 99%

Trace element composition of silicate inclusions in sub-lithospheric diamonds from the Juina-5 kimberlite: Evidence for diamond growth from slab melts

Thomson

Kohn

Bulanova

et al. 2016

Lithos

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Trace element composition of silicate inclusions in sublithospheric diamonds from the juina-5 kimberlite: Evidence for diamond growth from slab melts, LITHOS (2016), doi: 10.1016/j.lithos.2016.08.035 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E DM A N U S C R I P T ACCEPTED MANUSCRIPT ABSTRACTThe trace element compositions of inclusions in sub-lithospheric diamonds from the Juina-5 kimberlite, Brazil, are presented. Literature data for mineral/melt partition coefficients were collated, refitted and employed to interpret inclusion compositions. As part of this process an updated empirical model for predicting the partitioning behaviour of trivalent cations for garnet-melt equilibrium calibrated using data from 73 garnet-melt pairs is presented. High levels of trace element enrichment in inclusions interpreted as former calcium silicate perovskite and majoritic garnet preclude their origin as fragments of an ambient deep mantle assemblage. Inclusions believed to represent former bridgmanite minerals also display a modest degree of enrichment relative to mantle phases. The trace element composition of 'NAL' and 'CF phase' minerals are also reported. Negative Eu, Ce, and Y/Ho anomalies alongside depletions of Sr, Hf and Zr in many inclusions are suggestive of formation from a low-degree carbonatitic melt of subducted oceanic crust. Observed enrichments in garnet and 'calcium perovskite' inclusions limit depths of melting to less than ~ 600 km, prior to calcium perovskite saturation in subducting assemblages. Less enriched inclusions in sub-lithospheric diamonds from other global localities may represent deeper diamond formation. Modelled source rock compositions that are capable of producing melts in equilibrium with Juina-5 'calcium perovskite' and majorite inclusions are consistent with subducted MORB. Global majorite inclusion compositions suggest a common process is responsible for the formation of many superdeep diamonds, irrespective of geographic locality. Global transition zone inclusion compositions are reproduced by fractional crystallisation from a single parent melt, suggesting that they record the crystallisation sequence and melt evolution during this interaction of slab melts with ambient mantle. All observations are consistent with the previous hypothesis that many superdeep diamonds are created as slab-derived carbonatites interact with peridotitic mantle in the transition zone.

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Selected trace and minor element partitioning between peridotite minerals and carbonatite melts at 18–46 kb pressure

Cited by 122 publications

References 34 publications

LA-ICP-MS study of apatite- and K feldspar-hosted primary carbonatite melt inclusions in clinopyroxenite xenoliths from lamprophyres, Hungary: Implications for significance of carbonatite melts in the Earth’s mantle

LA-ICP-MS study of apatite- and K feldspar-hosted primary carbonatite melt inclusions in clinopyroxenite xenoliths from lamprophyres, Hungary: Implications for significance of carbonatite melts in the Earth’s mantle

U–Th–Pb and Lu–Hf isotopic constraints on the evolution of sub-continental lithospheric mantle, French Massif Central

Trace element composition of silicate inclusions in sub-lithospheric diamonds from the Juina-5 kimberlite: Evidence for diamond growth from slab melts

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