Experimental study of monazite solubility in haplogranitic melts: a new model for peraluminous and peralkaline melts

Maimaiti, Maierziyaguli; Fabbrizio, Alessandro; Carroll, M.; Ertel-Ingrisch, Werner; Abudureheman, Ababaikere; Paris, Eleonora; Dingwell, Donald B.

doi:10.1127/ejm/2019/0031-2801

Cited by 8 publications

(3 citation statements)

References 27 publications

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“…Monazite affects key elemental ratios (La/Yb, La/Sm, Th/La or U/Th) of sediment melts (e.g. Hermann & Rubatto, 2009;Skora & Blundy, 2010, 2012Stepanov et al, 2012;Maimaiti et al, 2019). In our S-undoped Ca-poor sediment, monazite was identified in all charges up to 800°C, at which melting degree is > 50 %.…”

Section: Ree and Actinides Behaviourmentioning

confidence: 73%

“…These results thus suggest that the LREE content in melt coexisting with monazite increases with bulk sulphur, perhaps due to complex change in major element compositions of hydrous melts as S increases (for example, an increase in CaO melt content as S increases could affect monazite solubility, e.g. Maimaiti et al, 2019). The significant anhydrite-celestine substitution in monazite in the sulphur-doped charges is consistent with this trend, and could have, moreover, a significant impact on the monazite/melt partition coefficients (e.g.…”

Section: Ree and Actinides Behaviourmentioning

confidence: 91%

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The Role of Sulphur on the Melting of Ca-Poor Sediment and on Trace Element Transfer in Subduction Zones: An Experimental Investigation

Pelleter

Prouteau

Scaillet

2021

Journal of Petrology

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We performed phase equilibrium experiments on a natural Ca-poor pelite at 3 GPa, 750-1000 °C, under moderately oxidizing conditions, simulating the partial melting of such lithologies in subduction zones. Experiments investigated the effect of sulphur addition on phase equilibria and compositions, with S contents of up to ∼ 2.2 wt. %. Run products were characterized for their major and trace element contents, in order to shed light on the role of sulphur on the trace element patterns of melts produced by partial melting of oceanic Ca-poor sediments. Results show that sulphur addition leads to the replacement of phengite by biotite along with the progressive consumption of garnet, which is replaced by an orthopyroxene-kyanite assemblage at the highest sulphur content investigated. All Fe-Mg silicate phases produced with sulphur, including melt, have higher MgO/(MgO+FeO) ratios (relative to S-free/poor conditions), owing to Fe being primarily locked up by sulphide in the investigated redox range. Secular infiltration of the mantle wedge by such MgO and K2O-rich melts may have contributed to the Mg and K-rich character of the modern continental crust. Addition of sulphur does not affect significantly the stability of the main accessory phases controlling the behaviour of trace elements (monazite, rutile and zircon), although our results suggest that monazite solubility is sensitive to S content at the conditions investigated. The low temperature (∼ 800 °C) S-bearing and Ca-poor sediment sourced slab melts show Th and La abundances, Th/La systematics and HFSE signatures in agreement with the characteristics of sediment-rich arc magmas. Because high S contents diminish phengite and garnet stabilities, S-rich and Ca-poor sediment sourced slab melts have higher contents of Rb, B, Li (to a lesser extent), and HREE. The highest ratios of La/Yb are observed in sulphur-poor runs (with a high proportion of garnet, which retains HREE) and beyond the monazite out curve (which retains LREE). Sulphides appear to be relatively Pb-poor and impart high Pb/Ce ratio to coexisting melts, even at high S content. Overall, our results show that Phanerozoic arc magmas from high sediment flux margins owe their geochemical signature to the subduction of terrigenous, sometimes S-rich, sediments. In contrast, subduction of such lithologies during Archean appears unlikely or unrecorded.

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Section: Ree and Actinides Behaviourmentioning

confidence: 73%

Section: Ree and Actinides Behaviourmentioning

confidence: 91%

The Role of Sulphur on the Melting of Ca-Poor Sediment and on Trace Element Transfer in Subduction Zones: An Experimental Investigation

Pelleter

Prouteau

Scaillet

2021

Journal of Petrology

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“…Capturing the chain of processes involved in the formation of ore deposits thus requires the behaviour of metals in magmatic systems to be understood. Geochemical studies have related the behaviour of metal ions in magmatic systems, the oxidation state of the magma, the presence of volatiles and the molecular structure of both melt and coexisting crystals (Watson, 1976;Watson, 1979;Ponader and Brown, 1989a;Blundy and Wood, 2003;Mysen, 2004;Naldrett, 2010;Botcharnikov et al, 2011;Davidson et al, 2013;Linnen et al, 2014;Duc-Tin and Keppler, 2015;Song et al, 2016;Maimaiti et al, 2019). Among these metals in magmatic systems, the rare earth elements (REE) usually behave incompatible during magmatic differentiation (Schilling and Winchester, 1967;Loubet et al, 1972;Henderson, 1984;Nelson et al, 1988;McLennan and Taylor, 2012;Chakhmouradian and Zaitsev, 2012), i.e., they tend to remain in the residual silicate liquid and are therefore unlikely to form ore deposits.…”

Section: Introductionmentioning

confidence: 99%

A window in the course of alkaline magma differentiation conducive to immiscible REE-rich carbonatites

Nabyl

Massuyeau

Gaillard

et al. 2020

Geochimica et Cosmochimica Acta

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The solubility of titanite in silicate melt determined from growth and dissolution experiments

Ayers

Flanagan

Miller

et al. 2022

Contrib Mineral Petrol

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Experimental study of monazite solubility in haplogranitic melts: a new model for peraluminous and peralkaline melts

Cited by 8 publications

References 27 publications

The Role of Sulphur on the Melting of Ca-Poor Sediment and on Trace Element Transfer in Subduction Zones: An Experimental Investigation

The Role of Sulphur on the Melting of Ca-Poor Sediment and on Trace Element Transfer in Subduction Zones: An Experimental Investigation

A window in the course of alkaline magma differentiation conducive to immiscible REE-rich carbonatites

The solubility of titanite in silicate melt determined from growth and dissolution experiments

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