Mixing of cogenetic magmas in the Cretaceous Zhangzhou calc-alkaline granite from southeast China recorded by in-situ apatite geochemistry

Zhang, Xiaobing; Guo, Feng; Zhang, Bo; Zhao, Liang; Wang, Guoqing

doi:10.2138/am-2021-7786

Cited by 17 publications

(6 citation statements)

References 111 publications

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“…The main limitation of SIMS is the fact that it requires homogeneous, wellcharacterised, and matrix-matched reference materials (RMs). Durango fluorapatite (Cerro de Mercado, Mexico) is the most commonly used RM for calibrating δ 18 O SIMS analyses of apatite (Trotter et al 2008, 2015, Wheeley et al 2012, Žigaitė and Whitehouse 2014, Xu et al 2015, Chen et al 2016, Zeng et al 2016, Bruand et al 2019, Bellucci et al 2020, Yang et al 2020, Edwards et al 2022, Zhang et al 2021. However, the study by Sun et al (2016) showed that not every Durango specimen is homogeneous and reported an inter-crystal 10 3 δ 18 O range of 4.4.…”

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confidence: 99%

Inter‐laboratory Characterisation of Apatite Reference Materials for Oxygen Isotope Analysis and Associated Methodological Considerations

Wudarska

Wiedenbeck

Słaby

et al. 2022

Geostandard Geoanalytic Res

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Here we report on the oxygen isotope compositions of four proposed apatite reference materials (chlorapatite MGMH#133648 and fluorapatite specimens MGMH#128441A, MZ-TH and ES-MM). The samples were initially screened for 18 O/ 16 O homogeneity using secondary ion mass spectrometry (SIMS) followed by δ 18 O determinations in six gas source isotope ratio mass spectrometry laboratories (GS-IRMS) using a variety of analytical protocols for determining either phosphate-bonded or "bulk" oxygen compositions. We also report preliminary δ 17 O and Δ' 17 O data, major and trace element compositions collected using EPMA, as well as CO 3 2and OHcontents in the apatite structure assessed using thermogravimetric analysis and infrared spectroscopy. The repeatability of our SIMS measurements was better than AE 0.25 ‰ (1s) for all four materials that cover a wide range of 10 3 δ 18 O values between +5.8 and +21.7. The GS-IRMS results show, however, a significant offset of 10 3 δ 18 O values between the "phosphate" and "bulk" analyses that could not be correlated with chemical characteristics of the studied samples. Therefore, we provide two sets of working values specific to these two classes of analytical methodologies as well as current working values for SIMS data calibration.

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confidence: 99%

Inter‐laboratory Characterisation of Apatite Reference Materials for Oxygen Isotope Analysis and Associated Methodological Considerations

Wudarska

Wiedenbeck

Słaby

et al. 2022

Geostandard Geoanalytic Res

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“…Our work focuses on the Campi Flegrei caldera, but the results can be extended to other volcanic systems characterized by evidence of mingling and mixing among magmas of different compositions (Anderson, 1976; Morgavi et al., 2017). Many erupted magmas suggest a rich history of interaction and mixing between different end‐members, and the literature abounds with such examples (e.g., Alves et al., 2021; Anderson, 1976; Cioni et al., 1995; Griffin et al., 2002; Ji et al., 2021; Yang et al., 2007; Zhang et al., 2021). Quite often, repetitive magma mixing events are recognized from the analysis of the erupted products, and they are usually interpreted as periodic arrivals of new magma inside a chamber (e.g., Caroff et al., 2021; Cioni et al., 1995; Civetta et al., 1991; Coppola et al., 2017; Neumann et al., 1999; Yanagi & Maeda, 1998).…”

Section: Discussionmentioning

confidence: 99%

Dynamics of Magma Chamber Replenishment Under Buoyancy and Pressure Forces

et al. 2023

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“…Many erupted magmas suggest a rich history of interaction and mixing between different end-members, and the literature abounds with such examples (e.g. Anderson, 1976;Cioni et al, 1995;Griffin et al, 2002;Yang et al, 2007;Zhang et al, 2021;Ji et al, 2021;Alves et al, 2021). Quite often, repetitive magma mixing events are recognized from the analysis of the erupted products, and they are usually interpreted as periodic arrivals of new magma inside a chamber (e.g.…”

Section: Discussionmentioning

confidence: 99%

Dynamics of magma chamber replenishment under buoyancy and pressure forces

Longo

Garg

Papale

et al. 2022

Preprint

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Active magma chambers are periodically replenished upon a combination of buoyancy and pressure forces driving upward motion of initially deep magma. Such periodic replenishments concur to determine the chemical evolution of shallow magmas, they are often associated to volcanic unrests, and they are nearly ubiquitously found to shortly precede a volcanic eruption. Here we numerically simulate the dynamics of shallow magma chamber replenishment by systematically investigating the roles of buoyancy and pressure forces, from pure buoyancy to pure pressure conditions and across combinations of them. Our numerical results refer to volcanic systems that are not frequently erupting, for which magma at shallow level is isolated from the surface (â\eurooeclosed conduitâ\euro? volcanoes). The results depict a variety of dynamic evolutions, with the pure buoyant endmember associated with effective convection and mixing and generation of no or negative overpressure in the shallow chamber, and the pure pressure end-member translating into effective shallow pressure increase without any dynamics of magma convection associated. Mixed conditions with variable extents of buoyancy and pressure forces illustrate dynamics initially dominated by overpressure, then, over the longer term, by buoyancy forces. Results globally suggest that many shallow magmatic systems may evolve during their lifetime under the control of buoyancy forces, likely triggered by shallow magma degassing. That naturally leads to long-term stable dynamic conditions characterized by periodic replenishments of partially degassed, heavier magma by volatile-rich fresh deep magma, similar to those reconstructed from petrology of many shallow-emplaced magmatic bodies.

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Mixing of cogenetic magmas in the Cretaceous Zhangzhou calc-alkaline granite from southeast China recorded by in-situ apatite geochemistry

Abstract: This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America. The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

Cited by 17 publications

References 111 publications

Inter‐laboratory Characterisation of Apatite Reference Materials for Oxygen Isotope Analysis and Associated Methodological Considerations

Inter‐laboratory Characterisation of Apatite Reference Materials for Oxygen Isotope Analysis and Associated Methodological Considerations

Dynamics of Magma Chamber Replenishment Under Buoyancy and Pressure Forces

Dynamics of magma chamber replenishment under buoyancy and pressure forces

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