Re–Os isotope systematics and platinum group element fractionation during mantle melt extraction: a study of massif and xenolith peridotite suites

Pearson, D. Graham; Irvine, G. J.; Ionov, Dmitri A.; Boyd, F. R.; Dreibus, G.

doi:10.1016/j.chemgeo.2004.04.005

Cited by 296 publications

(248 citation statements)

References 61 publications

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“…Effectively, much 278 of the HSE budget of the mantle, with the exception of Re, remains in the mantle until sulfide has 279 been completely removed, after which time Os-Ir-Ru and Pt are hosted by PGM phases rather than 280 being liberated in a silicate melt. This model is consistent with an increasing number of petrographic 281 observations indicating the presence of PGM phases in melt-depleted mantle peridotite (Luguet et al, 282 2003(Luguet et al, 282 , 2007Pearson et al, 2004;Brandon et al, 2006;Kogiso et al, 2008, Lorand et al, 2010 283 Fisher-Gödde et al, 2012). 284…”

supporting

confidence: 71%

Highly Siderophile Element and Os Isotope Systematics of Volcanic Rocks at Divergent and Convergent Plate Boundaries and in Intraplate Settings

Gannoun¹,

Burton²,

Day³

et al. 2016

Highly Siderophile and Strongly Chalcophile Elements in High-Temperature Geochemistry and Cosmochemistry

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mid-ocean ridge basalts (MORB), which account for more than eighty percent of Earth's volcanic 44 products and which are formed at divergent oceanic plate margins; intraplate volcanic rocks such as 45 ocean island basalts (OIB), continental flood basalts (CFB) and continental rift-related basalts, and 46 highly magnesian ultramafic volcanic rocks that dominantly occur in Archean terranes, termed 47 komatiites. All of these broadly basaltic rocks are considered to form by partial melting of the upper 48 mantle, followed by extraction from their source regions and emplacement at the Earth's surface. For 49 these reasons, basalts can be used to examine the nature and extent of partial melting in the mantle, 50 the compositions of mantle sources, and the interactions between Earth's crust and mantle. Because 51 much of Earth's mantle is inaccessible, basalts offer some of the best 'proxies' for examining mantle 52 composition, mantle convection and crust-mantle interactions. By contrast, at arcs, volcanism is 53 dominated by andesitic rock compositions. While some arcs do have basaltic and picritic magmatism, 54 these magma types are rare in convergent plate margin settings and reflect the complex fractional 55 crystallization and often associated concomitant assimilation processes occurring in arc settings. 56Despite the limited occurrence of high MgO magmas in arc volcanics, magmas from this tectonic 57 setting are also important for elucidating the behavior of the HSE from creation of basaltic 58 compositions at mid-ocean ridges to the subduction of this crust beneath arcs at convergent plate 59 margins. 60The highly siderophile elements (HSE; comprising Re and Au, along with the six platinum-61 group elements [PGE] Os, Ir, Ru, Rh, Pt and Pd) combined with the 187 Os and 190 Os 62 systems that are embedded within these elements, have found significant utility in the study of 63 basaltic rocks (e.g., Shirey & Walker, 1998;Carlson, 2005;Day, 2013). The greatest strengths of the 64 HSE lie in the fact that they strongly partition into metal or sulfide phases, and so record evidence for 65 processes that are not revealed from other isotope systems commonly used in high-temperature 66 geochemical studies (e.g., He-O-Sr-Nd-Hf-Pb). Partial melting over much of Earth's geological 67 history has resulted in significant fractionation of the HSE between the mantle and the crust (oceanic 68 and continental). The HSE show contrasting behavior during melting, with the platinum-PGE (PPGE; 69 Pt, Pd), Re and Au usually behaving as moderately compatible to moderately incompatible elements 70 during melting and crystallisation, and the iridium-PGE (IPGE; Os, Ir and Ru) acting as highly 71 compatible elements (Barnes et al., 1985). The differential response of the HSE to partial melting is 72 demonstrated by differences in both the absolute and relative abundances of the HSE in mantle-73 3 derived melts and in residual mantle rocks themselves. High degree melts, such as komatiites (e.g. 74Puchtel et al., 2009) show a smaller enr...

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supporting

confidence: 71%

Highly Siderophile Element and Os Isotope Systematics of Volcanic Rocks at Divergent and Convergent Plate Boundaries and in Intraplate Settings

Gannoun¹,

Burton²,

Day³

et al. 2016

Highly Siderophile and Strongly Chalcophile Elements in High-Temperature Geochemistry and Cosmochemistry

View full text Add to dashboard Cite

show abstract

“…These Os concentrations are similar to off-cratonic spinel peridotites from around the world (e.g., Meisel et al, 2001;Pearson et al, 2004;Peslier et al, 2000;Wu et al, 2006) 188 Os ratios greater than 0.5, either due to their high Re contents (> 0.2 ppb for sample ML-2 and ML-11), or owing to their low Os contents (b 0.2 ppb for sample . 187 Os/ 188 Os ratios range from 0.1171 to 0.1263, similar to those reported for other peridotite xenoliths from Shandong Peninsula (Chu et al, 2009;Gao et al, 2002).…”

Section: Re-os Isotopesmentioning

confidence: 64%

Petrology, geochemistry and Re–Os isotopes of peridotite xenoliths from Yantai, Shandong Province: Evidence for Phanerozoic lithospheric mantle beneath eastern North China Craton

Hong

Ren

et al. 2012

Lithos

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“…The strongly 383 compatible behavior of Os during mantle melting argues against this hypothesis; melt 384 depletion normally leads to higher Os contents in refractory harzburgites than precursor 385 peridotites in cratonic and massif peridotites (e.g. Pearson et al, 2004). An alternative 386 model is that the formation of the Malaita low-T harzburgites results from 387 melt-peridotite reaction involving dissolution of garnet and pyroxenes and precipitation 388 of new forsteritic olivine (e.g., Kelemen et al, 1992).…”

Section: Mechanism and Timing Of Low-t Harzburgite Formation 371mentioning

confidence: 89%

Ancient Os isotope signatures from the Ontong Java Plateau lithosphere: Tracing lithospheric accretion history

Ishikawa

Pearson

Dale

2011

Earth and Planetary Science Letters

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Re–Os isotope systematics and platinum group element fractionation during mantle melt extraction: a study of massif and xenolith peridotite suites

Cited by 296 publications

References 61 publications

Highly Siderophile Element and Os Isotope Systematics of Volcanic Rocks at Divergent and Convergent Plate Boundaries and in Intraplate Settings

Highly Siderophile Element and Os Isotope Systematics of Volcanic Rocks at Divergent and Convergent Plate Boundaries and in Intraplate Settings

Petrology, geochemistry and Re–Os isotopes of peridotite xenoliths from Yantai, Shandong Province: Evidence for Phanerozoic lithospheric mantle beneath eastern North China Craton

Ancient Os isotope signatures from the Ontong Java Plateau lithosphere: Tracing lithospheric accretion history

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