Ancient melt extraction from the oceanic upper mantle revealed by Re–Os isotopes in abyssal peridotites from the Mid-Atlantic ridge

Harvey, Jason; Gannoun, Abdelmouhcine; Burton, Kevin W.; Rogers, Nick; Alard, Olivier; Parkinson, I. J.

doi:10.1016/j.epsl.2006.02.031

Cited by 277 publications

(174 citation statements)

References 47 publications

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“…Re-Os isotopic data have previously revealed that refractory lithospheric mantle can survive in orogenic peridotites, ophioliticperidotites and abyssal peridotites [10,12,17,18,20,21,[46][47][48][49][50]. Given the heterogeneous distribution of refractory domains in the asthenospheric mantle, it may be unsuitable to determine Os isotopic characteristics of the mantle source from analyses of mantle peridotites.…”

Section: Spinel Recording Mantle Sourcementioning

confidence: 99%

Os isotopic evidence for a carbonaceous chondritic mantle source for the Nagqu ophiolite from Tibet and its implications

et al. 2012

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Early-crystallizing chromian spinel (Cr-spinel) in the Nagqu ophiolite has high Os and low Re contents, and it is resistant to alteration during serpentinization, weathering and metamorphism. The chemical composition of primitive magma is preserved in Cr-spinel, which makes it suitable for determining the initial Os-isotope composition of the mantle source. This study presents Cr-spinel Os isotopes and zircon U-Pb ages for cumulate dunite and gabbro, respectively, in the same cumulate section of the ophiolite at Nagqu in Tibet. The results shed light on the formation and evolution of lithospheric mantle. The Nagqu ophiolite is located in the central part of the Bangong-Nujiang suture zone. It is a remnant of the Neotethyan oceanic crust, and contains cumulate dunite and gabbro. Zircon from the gabbro yielded a weighted mean 206 Pb/ 238 U age of 183.7±1 Ma. Cr-spinel exhibits  Os values of 0.2 to 0.3, suggesting that the mantle source for the dunite is similar to that of carbonaceous chondrites. Thus, the Tibetan lithosphere is primarily a relic of Tethyan oceanic lithosphere, which has formed by the transformation of the normal asthenospheric mantle in the Mesozoic. This is the first study to combine the spinel Os isotopes with accurate zircon U-Pb ages to constrain the geochemical characteristics of the mantle source for the ophiolite.Re-Os isotopes, spinel, ophiolite, Nagqu, Tibet Citation:Huang Q S, Shi R D, Liu D L, et al. Os isotopic evidence for a carbonaceous chondritic mantle source for the Nagqu ophiolite from Tibet and its implications. Chin Sci Bull, 2013, 58: 9298,

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Section: Spinel Recording Mantle Sourcementioning

confidence: 99%

Os isotopic evidence for a carbonaceous chondritic mantle source for the Nagqu ophiolite from Tibet and its implications

et al. 2012

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“…1 of Ionov et al (2005) for the locality of Tok) exhibit remarkable similarities in chemical compositions (including a large range of Fo values and PGE patterns; Ionov et al, 2005Ionov et al, , 2006a and Os isotope compositions (Ionov et al, 2006a) to the Fuxin peridotites. Given their similar tectonic settings (both close to the Xing-Meng collisional orogen and PaleoPacific plate subduction), it is envisioned that similar lithospheric (Shirey and Walker, 1998 Parkinson et al (1998), Brandon et al (2000), Standish et al (2002), Harvey et al (2006), and Liu et al (2008). thinning and replacement occurred on the southeastern margin of the Siberia Craton during the Mesozoic-Cenozoic era, as suggested by Ionov et al (2006b).…”

Section: Phanerozoic Lithospheric Replacementmentioning

confidence: 99%

Big insights from tiny peridotites: Evidence for persistence of Precambrian lithosphere beneath the eastern North China Craton

et al. 2015

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Previous studies have shown that the eastern North China Craton (NCC) lost its ancient lithospheric mantle root during the Phanerozoic. The temporal sequence, spatial extent, and cause of the lithospheric thinning, however, continue to be debated. Here we report olivine compositions, whole-rock Re-Os isotopic systematics, and platinum-group element abundances of small (b 2 cm in maximum dimension) mantle peridotite xenoliths from two basalt localities from the eastern NCC, Wudi (Cenozoic) and Fuxin (Cretaceous). These locations lie far (~150-200 km) from the Tan-Lu fault, which has been linked to lithospheric replacement in the eastern NCC. Peridotites at both locations have fertile to moderately refractory compositions (Fo b 91.5), while highly refractory (Fo N 92) lithospheric mantle is largely absent. Osmium isotopic data suggest the Wudi peridotites experienced melt depletion primarily during the Paleoproterozoic (~1.8 Ga), although an Archean Os model age for one xenolith indicates incorporation of a minor component of Archean lithospheric mantle. These data suggest that a previously unrecognized Paleoproterozoic orogenic event removed and replaced the original Archean lithospheric mantle beneath the sedimentary basin at the southern edge of the Bohai Sea. By contrast, the Fuxin peridotites, entrained in Cretaceous basalts that crop out along the northern edge of the eastern NCC, document the coexistence of both ancient (≥2.3 Ga) and modern lithospheric mantle components. Here, the original Late Archean-Early Paleoproterozoic lithospheric mantle was, at least partially, removed and replaced prior to 100 Ma. Combined with literature data, our results show that removal of the original Archean lithosphere occurred within Proterozoic collisional orogens, and that replacement of Precambrian lithosphere during the Mesozoic may have been spatially associated with the collisional boundaries and the strike-slip Tan-Lu fault, as well as the onset of Paleo-Pacific plate subduction.

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“…the disturbance of bulk-rock HSE systematics by C-O-H-bearing fluids (e.g., Alard et al 2011) and sulfur-saturated silicate melts (e.g., Harvey et al 2015, and references therein). Distinct generations of PGM and BMS grains have different Re-Os isotopic signatures, thus leading to the observation that the mantle has a heterogeneous isotopic composition at various length scales (Rehkämper et al 1999;Griffin et al 2002;Alard et al 2005;Beyer et al 2006;Frei et al 2006;Harvey et al 2006). Moreover, in the last few years, combined Pb-Pb and Re-Os isotope studies of peridotite-hosted sulfides have shed new light on mantle geochronology (Burton et al 2012;Warren and Shirey 2012).…”

Section: Introductionmentioning

confidence: 99%

“…This review represents the first time that BMS in mantle rocks and diamonds are discussed together for the purposes of age determination. The interested reader should also consult other articles that have discussed these topics individually (e.g., Shirey and Walker 1998;Burton et al 1999Burton et al , 2012Pearson and Shirey 1999;Luguet et al 2001Luguet et al , 2003Luguet et al , 2004Luguet et al , 2007Luguet et al , 2008; Richardson et al 2001Richardson et al , 2004Richardson et al , 2009Shirey et al 2001Shirey et al , 2002Shirey et al , 2004aShirey et al ,b, 2013Alard et al 2002Alard et al , 2005Aulbach et al 2004aAulbach et al ,b, 2009aAulbach et al ,b,c, 2011Harvey et al 2006Harvey et al , 2010Harvey et al , 2011 …”

Section: Introductionmentioning

confidence: 99%

“…Burton et al (2012) measured Pb compositions in sulfides from the same section of peridotite drill core that was previously analyzed by Harvey et al (2006) for Re-Os compositions. Warren and Shirey (2012) measured Pb, Re, and Os isotopic compositions and concentrations in the same grain by extracting all three elements during the chemical purification procedure and employing spikes.…”

mentioning

confidence: 99%

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Mantle Sulfides and their Role in Re–Os and Pb Isotope Geochronology

Harvey¹,

Warren²,

Shirey³

2016

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

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Ancient melt extraction from the oceanic upper mantle revealed by Re–Os isotopes in abyssal peridotites from the Mid-Atlantic ridge

Cited by 277 publications

References 47 publications

Os isotopic evidence for a carbonaceous chondritic mantle source for the Nagqu ophiolite from Tibet and its implications

Os isotopic evidence for a carbonaceous chondritic mantle source for the Nagqu ophiolite from Tibet and its implications

Big insights from tiny peridotites: Evidence for persistence of Precambrian lithosphere beneath the eastern North China Craton

Mantle Sulfides and their Role in Re–Os and Pb Isotope Geochronology

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