Oxygen isotope heterogeneity and disequilibria of olivine crystals in large volume Holocene basalts from Iceland: Evidence for magmatic digestion and erosion of Pleistocene hyaloclastites

Bindeman, Ilya N.; Gurenko, Andrey A.; Sigmarsson, Olgeir; Chaussidon, M.

doi:10.1016/j.gca.2008.06.010

Cited by 114 publications

(90 citation statements)

References 67 publications

(110 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…O value of 5.35‰ within the analytical errors [32]. The O isotopic analytical results of the studied olivine crystals and the San Carlos olivine standard are listed in Table 2.…”

supporting

confidence: 51%

“…the melts derived from the peridotites have relatively low  18 O (5.2‰), whereas the magmas derived from metasomatized pyroxenites have higher  18 O (5.9‰). Nevertheless, in situ O isotope analyses on olivine from the low- 18 O OIBs from both the Iceland and Hawaii regions suggested that the low- 18 O features were formed by assimilation of low- 18 O oceanic crust [32,45,46]. The olivine phenocrysts in basalts from the Kamchatka arc have higher  18 O than normal mantle, which were considered to form through mixing of magmas derived from different mantle sources and/or disequilibrium diffusion-driven O isotope fractionation [47], with the high- 18 O magma component from a mantle wedge strongly modified by 18 O-rich fluids.…”

Section: Origin Of Low- 18 O Olivinementioning

confidence: 99%

See 1 more Smart Citation

A metasomatized mantle wedge origin for low-δ 18O olivine in late Cretaceous Junan and Qingdao basalts in the Sulu orogen

Guo

Wang

et al. 2013

Chin. Sci. Bull.

View full text Add to dashboard Cite

The North China Block (NCB) experienced extensive lithospheric thinning and subsequent mantle accretion in the Mesozoic to Cenozoic, but their mechanism remains controversial. This paper reports in situ chemical and oxygen isotope analyses on olivine xenocrysts and porphyroclastic olivines in mantle xenoliths hosted in the late Cretaceous basalts from Junan and Qingdao, the Sulu orogen. The results show that all these olivines have low  18 O values relative to normal mantle peridotite. The olivine xenocrysts and porphyroclastic olivines from Junan have Fo=87.589.8,  18 O=4.1‰-5.2‰ with an average of 4.8‰; the porphyroclastic olivines from Qingdao also have Fo=89.089.9,  18 O=4.1‰-5.2‰ with an average of 4.8‰. These peridotite xenoliths have petrological and geochemical affinities similar to newly accreted MORB-type mantle, we hence consider such low- 18 O features in the olivines to inherit from a mantle wedge that was metasomatized by melts derived from the subducted oceanic crust, which had experienced high-temperature hydrothermal alteration to acquire the low- 18 O signatures. Combined the existence of Cenozoic low- 18 O basalts and garnet pyroxenite xenoliths (relicts of recycled oceanic crust) hosted in Cenozoic basalts in the NCB, the subducted oceanic crust likely played an important role in the lithospheric evolution of the NCB during the Mesozoic to Cenozoic.

show abstract

“…O value of 5.35‰ within the analytical errors [32]. The O isotopic analytical results of the studied olivine crystals and the San Carlos olivine standard are listed in Table 2.…”

supporting

confidence: 51%

Section: Origin Of Low- 18 O Olivinementioning

confidence: 99%

A metasomatized mantle wedge origin for low-δ 18O olivine in late Cretaceous Junan and Qingdao basalts in the Sulu orogen

Guo

Wang

et al. 2013

Chin. Sci. Bull.

View full text Add to dashboard Cite

show abstract

“…Typical ion intensities of 2-4 Â 10 6 counts per second obtained on the 18 O peak yielded an internal 2s uncertainty of better than ± 0.2%. Three unknown and two standard d 18 [63][64][65] . However, olivine with Fo number o65 has been proven to show about 0.6 permil bias IMF with San Carlos olivine as the standard 65 .…”

Section: Methodsmentioning

confidence: 99%

Continental flood basalts derived from the hydrous mantle transition zone

et al. 2015

View full text Add to dashboard Cite

“…The three response surface models of this study were applied to the IMF correction of the SIMS 18 64 The quartz results presented a bimodal distribution, with one group situated at 9-12‰ and a second one displaying significant lower values of 6-8‰.…”

Section: Example Of Application Of Rsm To Imf Predictionmentioning

confidence: 98%

Predicting instrumental mass fractionation (IMF) of stable isotope SIMS analyses by response surface methodology (RSM) [Dataset]

Duocastella¹,

Rossell²,

Alsina³

et al. 2017

UPCommons. Portal Del Coneixement Obert De La UPC

Self Cite

View full text Add to dashboard Cite

Instrumental mass fractionation (IMF) of isotopic SIMS analyses (Cameca 1280HR, CRPG Nancy) was predicted by response surface methodology (RSM) for 18 O/ 16O determinations of plagioclase, K-feldspar, and quartz. The three predictive response surface models combined instrumental and compositional inputs. The instrumental parameters were: (i) X and Y stage position, (ii) the values of LT1DefX and LT1DefY electrostatic deflectors, (iii) chamber pressure and, (iv) primary-ion beam intensity. The compositional inputs included: (i) anorthite content (An%) for the plagioclase model and, (ii) orthoclase (Or%) and barium (BaO%) contents for the K-feldspar model. The three models reached high predictive powers.

show abstract

Oxygen isotope heterogeneity and disequilibria of olivine crystals in large volume Holocene basalts from Iceland: Evidence for magmatic digestion and erosion of Pleistocene hyaloclastites

Cited by 114 publications

References 67 publications

A metasomatized mantle wedge origin for low-δ 18O olivine in late Cretaceous Junan and Qingdao basalts in the Sulu orogen

A metasomatized mantle wedge origin for low-δ 18O olivine in late Cretaceous Junan and Qingdao basalts in the Sulu orogen

Continental flood basalts derived from the hydrous mantle transition zone

Predicting instrumental mass fractionation (IMF) of stable isotope SIMS analyses by response surface methodology (RSM) [Dataset]

Contact Info

Product

Resources

About