Determination of zircon/melt trace element partition coefficients from SIMS analysis of melt inclusions in zircon

Thomas, Jay B.; Bodnar, Robert J.; Shimizu, Nobumichi; Sinha, A. K.

doi:10.1016/s0016-7037(02)00881-5

Cited by 160 publications

(90 citation statements)

References 81 publications

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“…Timms et al 2006;Reddy et al 2009). The chemical composition of zircon may be used to elaborate many magmatic processes, including crystal fractionation (Wark and Miller 1993;Thomas et al 2002;Pettke et al 2005;Lowery Claiborne et al 2006), interaction with hydrothermal fluids (Thomas et al 2002;Hoskin 2005) and/ or magma mixing (Wang et al 2002;Belousova et al 2006), as well as being a potential source indicator (Belousova et al 2002). The zircon crystallization history may provide unique insights into magma petrogenesis, provided that the magma system is reasonably well characterised geochemically and isotopically.…”

Section: Introductionmentioning

confidence: 99%

Zircon texture and chemical composition as a guide to magmatic processes and mixing in a granitic environment and coeval volcanic system

Gagnevin

Daly

Kronz

2009

Contrib Mineral Petrol

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This study documents the chemical and textural responses of zircon in the Elba igneous complex, with particular reference to the 7-to 7.8-Ma-old Monte Capanne pluton in relation to its coeval volcanic counterpart (Capraia), using BSE imaging and quantitative electron microprobe analyses. The Monte Capanne pluton displays multiple field and geochemical evidence for magma mixing. The samples we have investigated (including monzogranitic, mafic enclave and dyke samples) display similar zircon textures and are associated with an extremely large range of trace and minor element (Hf, Y, HREE, Th, U) compositions, which contrast with relatively simple textures and zoning patterns in zircons from a Capraia dacite. We have used a relatively simple textural classification (patchy zoning, homogenous cores, oscillatory zoning and unzoned zircon) as the basis for discussing the chemical composition and chemical variation within zircons from the Monte Capanne pluton. Based on these data and other works in Lithos 78:101-118, 2004 , it is inferred that mixing between metaluminous and peraluminous melts occurred early in the evolution of the Monte Capanne magma chamber. In particular, mixing was responsible for the development of the patchy-zoning texture in the zircon cores, which was associated with reactions between other accessory phases (including monazite, apatite, allanite), which we infer to have significantly affected the Th distribution in zircon. Zircons from the MC pluton displaying ''homogeneous cores'' have chemical affinities with zircons in the coeval Capraia volcanic system, consistent with the participation of a Capraia-like mantle end-member during mixing. Further zircon growth in the MC pluton produced the oscillatory zoning texture, which records both long-term (crystal fractionation) and transient (recharge with both silicic and mafic magmas) events in a hybrid magma chamber. It is inferred that Hf and the Th/U ratio cannot be used alone to infer magmatic processes due to their dependency on temperature, nor are they a diagnostic feature of xenocrystic grains. This study shows that zircon chemistry coupled with detailed textural analysis can provide a powerful tool to elucidate the complex evolution of a magma system.

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Section: Introductionmentioning

confidence: 99%

Zircon texture and chemical composition as a guide to magmatic processes and mixing in a granitic environment and coeval volcanic system

Gagnevin

Daly

Kronz

2009

Contrib Mineral Petrol

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“…5-8). The D values obtained by [96] indicate that under the crystallization of zircons from the diorites of Quottoon complex La, Ce and Nd had the geochemical properties of the incompatible trace elements, while the rest REE had the properties of compatible elements.…”

Section: Zirconsmentioning

confidence: 91%

“…Among the first, the data on the values of D (zircon / dacite matrix) and D (zircon / granite) were published by [96], according to which the D of all REE for these rocks have values > 1, while the values for the light elements were the first units and for heavy elements -366-389 (Fig. 5-3).…”

Section: Zirconsmentioning

confidence: 99%

“…In addition, on a laser-fluorescent patterns of zircons from garnet amphibolites of the Cape Kamchatka (Kamchatka, Russia) there were also determined the lines, which were attributed to Er 3+ ions [101]. It is assumed that in the structure of zircons there are two basic positions that can potentially be replaced by cations: tetrahedral position in which Si 4+ ions are, and triangular (dodecahedral) position, which contains the Zr 4+ ions, and the latter is the most favorable for the replacement of heavy REE by ions [96]. However, the relatively high level of compatibility with the zircon crystal structure of heavy and part of MREE, is obviously not only due to similar size of the radii of their trivalent ions and network-forming ions, but also because of an appropriate balance of their charges.…”

Section: Zirconsmentioning

confidence: 99%

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Consistent patterns of rare earth element distribution in accessory minerals from rocks of mafic-ultramafic complexes

Lesnov

2013

Open Geosciences

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This paper summarizes analytical data accumulated in the world literature and other materials about the regularities of the REE distribution in minerals contained in ultramafic and mafic rocks as accessory phases. These minerals are tentatively divided into two groups. The first includes garnets, zircons, apatites and perovskites, which can accumulate increased amounts of REE in their structure. The second consists of minerals whose structure can accumulate only limited contents of these trace elements. These are chrome-spinels, ilmenites, and micas. These minerals, in respect of REE geochemistry, are studied to a varying degree because of the different levels of accumulations of these elements, different degrees of occurrence in rocks, tiny sizes of their grains and other reasons. The analytical database formed on their basis includes about 600 original analyses. The overwhelming majority of presently available data on REE geochemistry in accessory minerals from ultramafic and mafic rocks have been published only in the recent 15 years. The studies became possible due to the development and introduction of new highly sensible microprobe analyses allowing detection of REE and many other trace elements in minerals grains directly in thin sections. The greatest numbers of these analyses were performed for garnets and zircons, fewer for apatites, and the fewest for chrome-spinels, ilmenites, micas, and perovskites. In general, the regularities of REE distribution in these minerals from ultramafic and mafic rocks are less studied compared to the rock-forming minerals from ultramafic and mafic rocks. Among the analytical methods, which were used to study the REE composition of accessory minerals, the most efficient was the mass-spectrometry with inductively coupled plasma (ICP-MS).Keywords: REE distribution • ultramafic and mafic rocks • accessory minerals © Versita Sp. z o.o.

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“…Hydration crystallization, an equilibrium, incongruent process, provides an alternative to crystal fractionation for explaining late-stage variations in pluton chemistry. These evolved equilibrium melts are likely to be important in understanding the origin of late magmatic liquids including aplites, pegmatites, and melt inclusions in late crystallizing phases (e.g., zircon; Thomas et al 2002). For example, note that the leucocratic Bell Island pluton tonalites used as a starting material for model 1 lie along the trend defined by model 2 melts in figure 4.…”

Section: Bowen's Discontinuous Reaction Series Extended Tomentioning

confidence: 98%

Using Incongruent Equilibrium Hydration Reactions to Model Latter‐Stage Crystallization in Plutons: Examples from the Bell Island Tonalite, Alaska

Beard¹,

Ragland²,

Crawford³

2005

The Journal of Geology

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(2005) Using incongruent equilibrium hydration reactions to model latter-stage crystallization in plutons: Examples from the Bell Island Tonalite, Alaska, J. Geol., 133,[589][590][591][592][593][594][595][596][597][598][599] [ A B S T R A C TModels using hydration crystallization reactions (the reverse of dehydration melting reactions such as amph ϩ ) for the Bell Island pluton define incongruent equilibrium crystallization paths from hydrous qtz p px ϩ melt -Ti andesine (30%-50% solid) to a solid tonalite consisting mostly of hornblende, melt ϩ pyroxene ϩ Fe oxides ϩ calcic biotite, epidote, sodic andesine, and quartz. In essence, hydration crystallization is a way to quantify and modify the lower temperature end of Bowen's discontinuous reaction series and apply it to natural samples. Hydration crystallization provides an alternative to crystal fractionation for explaining variations in pluton chemistry, especially the compositions of late plutonic melts. Another characteristic of hydration crystallization is that the reactions have the potential to buffer the water content of the melt during crystallization. Two closed-system models, representing different sets of starting conditions and phases, are considered, based on least squares, mass-balance calculations of reactions and constrained by the petrography of the rocks. Model 1 starts with an average modified Bell Island leucotonalite melt coexisting with two pyroxenes, two Fe-Ti oxides, and plagioclase at the beginning of hydration crystallization. The starting assemblage of model 2 omits orthopyroxene and magnetite, includes amphibole, and uses a calculated melt composition. Both models generally predict, via different series of hydration crystallization reactions, the observed subsolidus mode. Model 2, however, is preferred based on petrographic observations of the Bell Island rocks, specifically the lack of magnetite and orthopyroxene, as well as certain textural features.

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Determination of zircon/melt trace element partition coefficients from SIMS analysis of melt inclusions in zircon

Cited by 160 publications

References 81 publications

Zircon texture and chemical composition as a guide to magmatic processes and mixing in a granitic environment and coeval volcanic system

Zircon texture and chemical composition as a guide to magmatic processes and mixing in a granitic environment and coeval volcanic system

Consistent patterns of rare earth element distribution in accessory minerals from rocks of mafic-ultramafic complexes

Using Incongruent Equilibrium Hydration Reactions to Model Latter‐Stage Crystallization in Plutons: Examples from the Bell Island Tonalite, Alaska

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