Phase equilibrium modeling of zircon stability in mantle peridotite: Implication for crust-mantle interaction

Xiang, Hua; Zheng, Jianping; Li, Yibing; Zhang, Zeming

doi:10.1007/s11430-021-9839-2

Cited by 4 publications

(2 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The occurrence of the Zr minerals larger than 1 mm is exceedingly rare; nonetheless micro-scale grains of Zr minerals in ultrama c-ma c rocks have been reported from many localities 31,32 . Baddeleyite is typically found as an accessory mineral in igneous rocks such as carbonatites, kimberlites, alkali rocks, and some ma c rocks 31 .…”

Section: Discussionmentioning

confidence: 99%

“…However, in ultrama c rocks, complex coexistence relationships, such as olivine or serpentine ± zircon ± baddeleyite, have been reported from various ages and tectonic settings [33][34][35][36][37][38][39][40] . Xiang et al 32 reviewed occurrences of Zr minerals in ultrama c rocks and calculated their thermodynamic stability. They showed that zircon and olivine can coexist up to upper mantle conditions of approximately 1300-1500°C.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Extreme Maldistribution of High Field Strength Elements along Subduction Zones Revealed by Baddeleyite Aggregates in Serpentinite

Sawada,

Oyanagi,

Niki

et al. 2024

Preprint

View full text Add to dashboard Cite

Alkaline fluids associated with serpentinization cause the dissolution and precipitation of high field strength elements (HFSE) and formation of rare mineral species. In this study, newly discovered baddeleyites in the Higuchi serpentinite body (HSB), Japan, are described. The HSB occurs as a 15×8 m outcrop surrounded by high-P/T metapelite, and baddeleyite was collected from only one serpentinite block. The baddeleyite appear as aggregates exhibiting angular or subrounded shapes with sizes of up to 2 mm in length. The aggregates are composed of acicular baddeleyite surrounded by porous zircon rims. Both the baddeleyite and the zircon yielded U–Pb ages of ca. 96 Ma, corresponding to the peak metamorphic age of the region. Within the aggregates, Th-enriched areas with sizes of less than 20 µm were observed. The baddeleyite aggregates show enrichment of light rare earth elements with positive Eu anomalies. The baddeleyite aggregates were likely produced with zircon megacrysts through metamorphism during serpentinization. Subsequent metasomatism associated with carbonation and silicification led to the formation of the zircon rim and trace-elemental maldistribution. This study demonstrates significant heterogeneity of milli- to micro-scales within a meter-scale serpentinite outcrop. This finding may necessitate a reassessment of the HFSE cycling in subduction zones.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Extreme Maldistribution of High Field Strength Elements along Subduction Zones Revealed by Baddeleyite Aggregates in Serpentinite

Sawada,

Oyanagi,

Niki

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Zircon within chromitite requires revision of the tectonic history of the Eoarchean Itsaq Gneiss complex, Greenland

Sawada

Morishita

Vezinet

et al. 2023

Geoscience Frontiers

View full text Add to dashboard Cite

Coronitic and Symplectitic Textures in Meta-Troctolite Reveal the Transition from Magmatism to Granulite-Facies Metamorphism in the Early Paleozoic Tongbai Orogen, Central China

Wang

Zheng

Scott

et al. 2022

Journal of Petrology

View full text Add to dashboard Cite

Newly discovered meta-troctolite enclaves in Early Paleozoic Huanggang diorite within dominantly meta-volcaniclastic greenschist to amphibolite facies Erlangping unit in central China extends the known extent of granulite-facies metamorphism in the Tongbai Orogen. Evidence for this granulite facies event is preserved in coronitic and symplectitic textures developed in the meta-troctolites enclaves. The primary assemblage comprises olivine and plagioclase with minor orthopyroxene, clinopyroxene, spinel and amphibole. The late magmatic stage comprising an orthopyroxene (Opx1) corona around olivine and clinopyroxene corona around spinel formed by reaction of cumulus and intercumulus phases with trapped melt at around 1040 – 1060 °C near the solidus. During troctolite cooling, metamorphic solid-state replacement of primary olivine and plagioclase produced orthopyroxene (Opx1)/clinopyroxene (Cpx1) + vermicular spinel (Sp1) symplectite, followed by an inclusion-free amphibole (Amp1) layer surrounded by amphibole + spinel symplectite (Amp2 + Sp2). Microstructural, pseudosection and mineral isopleth analysis coupled with prominent compositional zoning in the Opx1 corona and chrome-rich spinel (Cr-Sp) suggests that the symplectites formed by diffusion-controlled solid-state replacement at the interface of reactant minerals, probably during cooling to granulite-facies conditions of ~ 820 – 880 °C and 6.7 – 7.0 kbar. U-Pb dates of rare metamorphic zircon – as indicated by growth zonation and identification of metamorphic minerals enclosed in grains by Raman probe – are ca. 450 Ma. The reaction textures record the transition from late magmatic to granulite-facies metamorphism with the heat supplied by magma upwelling at the base of Erlangping arc triggered by extension of Erlangping back-arc.

show abstract

Phase equilibrium modeling of zircon stability in mantle peridotite: Implication for crust-mantle interaction

Cited by 4 publications

References 59 publications

Extreme Maldistribution of High Field Strength Elements along Subduction Zones Revealed by Baddeleyite Aggregates in Serpentinite

Extreme Maldistribution of High Field Strength Elements along Subduction Zones Revealed by Baddeleyite Aggregates in Serpentinite

Zircon within chromitite requires revision of the tectonic history of the Eoarchean Itsaq Gneiss complex, Greenland

Coronitic and Symplectitic Textures in Meta-Troctolite Reveal the Transition from Magmatism to Granulite-Facies Metamorphism in the Early Paleozoic Tongbai Orogen, Central China

Contact Info

Product

Resources

About