Fluid action on zircon growth and recrystallization during quartz veining within UHP eclogite: Insights from U–Pb ages, O–Hf isotopes and trace elements

Sheng, Yue; Zheng, Yong‐Fei; Chen, Ren‐Xu; Li, Qiuli; Dai, Mingchong

doi:10.1016/j.lithos.2011.06.012

Cited by 49 publications

(53 citation statements)

References 87 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Metamorphic veins Generally, there are two types of metamorphic veins in deeply subducted continental crust, which are mainly formed at subsolidus conditions: (1) felsic veins, which are primarily composed of variable abundances of felsic minerals such as quartz, feldspar, kyanite, and phengite with minor amounts of mafic minerals such as omphacite, garnet, zoisite, and amphibole (e.g., Franz et al 2001;Li et al 2001Zheng et al 2007;Wu et al 2009;Chen et al 2012a;Sheng et al, 2012Sheng et al, , 2013 and (2) mafic veins, which are usually composed of variable abundances of mafic minerals such as omphacite, epidote, zoisite, allanite, and garnet with minor amounts of felsic minerals such as quartz and kyanite (e.g., Gao et al 2007;John et al 2008;Zhang et al 2008;Spandler et al 2011;Guo et al 2012). In addition, the veins contain variable abundances of accessory minerals such as rutile, zircon, and apatite.…”

Section: Natural Constraintsmentioning

confidence: 99%

“…This leads to different types of mineral parageneses for metamorphic veins in UHP metamorphic rocks. As a consequence, there is a significant variation in the composition of subductionzone fluids, sometimes with survival of relict minerals from the fluid-scavenged rocks (e.g., Zheng et al 2007;Sheng et al 2012Sheng et al , 2013.…”

Section: Natural Constraintsmentioning

confidence: 99%

“…Zircon grains of metamorphic origin frequently occur in UHP eclogite-facies metamorphic rocks, exhibiting shapes and structures that indicate significant dissolution of protolith zircon and subsequent overgrowth of metamorphic zircon (e.g., Liati and Gebauer 1999;Rubatto and Hermann 2003;Zheng et al 2004Zheng et al , 2007Sheng et al 2012Sheng et al , 2013. This indicates significant action of fluids on the protolith zircon at subsolidus to supersolidus conditions (Zheng, 2009).…”

Section: Action Of Subduction-zone Fluids Accessary Mineral Records Omentioning

confidence: 99%

“…Substantially, zircon is an excellent phase to record the action of fluids because the U-Pb age, trace elements, and O and Hf isotopes can be determined within the same domain of single crystals (Chen et al 2011;Sheng et al 2012Sheng et al , 2013.…”

Section: Action Of Subduction-zone Fluids Accessary Mineral Records Omentioning

confidence: 99%

See 3 more Smart Citations

Geochemistry of continental subduction-zone fluids

Zheng

Hermann

2014

Earth, Planets and Space

Self Cite

213

117

View full text Add to dashboard Cite

The composition of continental subduction-zone fluids varies dramatically from dilute aqueous solutions at subsolidus conditions to hydrous silicate melts at supersolidus conditions, with variable concentrations of fluid-mobile incompatible trace elements. At ultrahigh-pressure (UHP) metamorphic conditions, supercritical fluids may occur with variable compositions. The water component of these fluids primarily derives from structural hydroxyl and molecular water in hydrous and nominally anhydrous minerals at UHP conditions. While the breakdown of hydrous minerals is the predominant water source for fluid activity in the subduction factory, water released from nominally anhydrous minerals provides an additional water source. These different sources of water may accumulate to induce partial melting of UHP metamorphic rocks on and above their wet solidii. Silica is the dominant solute in the deep fluids, followed by aluminum and alkalis. Trace element abundances are low in metamorphic fluids at subsolidus conditions, but become significantly elevated in anatectic melts at supersolidus conditions. The compositions of dissolved and residual minerals are a function of pressure-temperature and whole-rock composition, which exert a strong control on the trace element signature of liberated fluids. The trace element patterns of migmatic leucosomes in UHP rocks and multiphase solid inclusions in UHP minerals exhibit strong enrichment of large ion lithophile elements (LILE) and moderate enrichment of light rare earth elements (LREE) but depletion of high field strength elements (HFSE) and heavy rare earth elements (HREE), demonstrating their crystallization from anatectic melts of crustal protoliths. Interaction of the anatectic melts with the mantle wedge peridotite leads to modal metasomatism with the generation of new mineral phases as well as cryptic metasomatism that is only manifested by the enrichment of fluid-mobile incompatible trace elements in orogenic peridotites. Partial melting of the metasomatic mantle domains gives rise to a variety of mafic igneous rocks in collisional orogens and their adjacent active continental margins. The study of such metasomatic processes and products is of great importance to understanding of the mass transfer at the slab-mantle interface in subduction channels. Therefore, the property and behavior of subduction-zone fluids are a key for understanding of the crust-mantle interaction at convergent plate margins.

show abstract

Section: Natural Constraintsmentioning

confidence: 99%

Section: Natural Constraintsmentioning

confidence: 99%

Section: Action Of Subduction-zone Fluids Accessary Mineral Records Omentioning

confidence: 99%

Section: Action Of Subduction-zone Fluids Accessary Mineral Records Omentioning

confidence: 99%

See 2 more Smart Citations

Geochemistry of continental subduction-zone fluids

Zheng

Hermann

2014

Earth, Planets and Space

Self Cite

213

117

View full text Add to dashboard Cite

show abstract

“…However, recent studies showed that some quartz veins in ultrahigh-pressure metamorphic eclogites also contain inherited zircons (Sheng et al, 2012;Liu et al, 2014). These inherited zircons, similar to zircons in hosting eclogites with respect to age and some geochemical characteristics, were considered being physically transported by the fluid precipitating quartz.…”

Section: Assumption and Questionsmentioning

confidence: 99%

A revisit to the Yorii jadeite–quartz rock, the Kanto Mountains, central Japan: Implications for petrogenesis

Yui

Fukuyama

2015

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

The crust‐mantle interaction in continental subduction channels: Zircon evidence from orogenic peridotite in the Sulu orogen

Chen

Zheng

et al. 2016

JGR Solid Earth

View full text Add to dashboard Cite

A combined secondary ion mass spectrometer and laser ablation‐(multicollector)‐inductively coupled plasma mass spectrometer study of zircon U‐Pb ages, trace elements, and O and Hf isotopes was carried out for orogenic peridotite and its host gneiss in the Sulu orogen. Newly grown zircon domains exhibit weak zoning or no zoning, relatively low Th/U ratios (<0.1), low heavy rare earth element (HREE) contents, steep middle rare earth element‐HREE patterns, negative Eu anomalies, and negative to low δ18O values of −11.3 to 0.9‰ and U‐Pb ages of 220 ± 2 to 231 ± 4 Ma. Thus, these zircons would have grown from metasomatic fluids during the early exhumation of deeply subducted continental crust. The infiltration of metasomatic fluids into the peridotite is also indicated by the occurrence of hydrous minerals such as amphibole, serpentine, and chlorite. In contrast, relict zircon domains exhibit magmatic zircon characteristics. Their U‐Pb ages and trace element and Hf‐O isotope compositions are similar to those for protolith zircons from ultrahigh‐pressure metamorphic rocks in the Dabie‐Sulu orogenic belt. Thus, these relict magmatic zircons would be physically transported into the peridotite by metasomatic fluids originated from the deeply subducted continental crust. Therefore, the peridotite underwent metasomatism by aqueous solutions derived from dehydration of the deeply subducted continental crust during the early exhumation. It is these crustally derived fluids that would have brought not only such chemical components as Zr and Si but also tiny zircon grains from the deeply subducted crustal rocks into the peridotite at the slab‐mantle interface in continental subduction channels. As such, the orogenic peridotite records the crust‐mantle interaction at the deep continental subduction zone.

show abstract

Fluid action on zircon growth and recrystallization during quartz veining within UHP eclogite: Insights from U–Pb ages, O–Hf isotopes and trace elements

Cited by 49 publications

References 87 publications

Geochemistry of continental subduction-zone fluids

Geochemistry of continental subduction-zone fluids

A revisit to the Yorii jadeite–quartz rock, the Kanto Mountains, central Japan: Implications for petrogenesis

The crust‐mantle interaction in continental subduction channels: Zircon evidence from orogenic peridotite in the Sulu orogen

Contact Info

Product

Resources

About