Re–Pt–Os Isotopic and Highly Siderophile Element Behavior in Oceanic and Continental Mantle Tectonites

Abstract

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186Os–187Os and highly siderophile element abundance systematics of the mantle revealed by abyssal peridotites and Os-rich alloys

“…Our calculated PM composition based on oceanic peridotites is similar to the PM estimates provided by Becker et al (2006) and Chatterjee and Lassiter (2016) Aulbach et al, 2016;Luguet & Reisberg, 2016;Becker & Dale, 2016).…”

“…Additionally, during upwelling and partial melting beneath the ridge, abyssal peridotites may be infiltrated by associated melts (Niu, 2004;Warren, 2016). Nonetheless, abyssal peridotites can be used to help to unravel the composition of the PM, as they are not subject to complex melt refertilization from exotic melts and fluids, as may occur in the continental lithospheric mantle (Becker & Dale, 2016).…”

Chalcophile elements in Martian meteorites indicate low sulfur content in the Martian interior and a volatile element-depleted late veneer

“…Copper, Se, Te and Pd show substantial differences in sulfide-silicate melt partition coefficients, e.g., D sulfide-silicate Se (200-1500) < D sulfide-silicate Cu (500-1600) < D sulfide-silicate Te (2500-10000) < D sulfide-silicate Pd (10 5 -10 6 ) (e.g., Brenan, 2015;Mungall and Brenan, 2014;Patten et al, 2013). Many factors affect partition coefficients and complete sulfide-silicate melt equilibration is not necessarily ascertained in natural processes (e.g., Becker and Dale, 2016;Wang and Becker, 2015a). Nevertheless, the relative bulk partitioning behavior of these elements can be predicted based on natural samples and experimentally determined partition coefficients, e.g., D Te /D Se of 5-9 and D Te /D Cu of 2-10 at 3-22wt.% FeO in the silicate melt and D Cu << D Pd (Brenan, 2015;Mungall and Brenan, 2014;Patten et al, 2013;Wang and Becker, 2015a).…”

Highly Siderophile Elements in Earth, Mars, the Moon, and Asteroids

“…Extensive research has been done on understanding terrestrial mantle and crustal composition, and the reader is referred to alternative chapters in this book for mantle composition (Aulbach et al 2016;Becker and Dale 2016;Luguet and Reisberg 2016, all in this volume), as well as to Peucker-Ehrenbrink and Jahn (2001) and Peucker-Ehrenbrink et al (2012) for reviews of terrestrial crustal composition estimates. The basic method of obtaining mantle abundance is through projection of HSE data to a hypothetically undepleted mantle composition, typically termed as primitive mantle (PM) or primitive upper mantle (PUM).…”