Geobarometry for spinel peridotites using Ca and Al in olivine

D’Souza, Rameses J.; Canil, Dante; Coogan, L. A.

doi:10.1007/s00410-019-1647-6

Cited by 17 publications

(11 citation statements)

References 37 publications

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“…Given the strong temperature dependence of Ca-in-olivine thermobarometry (∼60°C/GPa, Shejwalkar & Coogan, 2013) and high diffusivity of Ca in olivine (Coogan et al, 2005), the partitioning of Ca in olivine is potentially vulnerable to post-melting subsolidus processes and pre-emplacement thermal disturbance (Canil & Russell, 2022;D'Souza et al, 2020). The Ca-in-olivine thermometer presented by J. C. De Hoog et al ( 2010) is a potential tool to assess and correct for such effects, as it is sensitive to both temperature and pressure.…”

Section: Unraveling the Thermal History And Architecture Of The Shall...mentioning

confidence: 99%

Petrogenesis, Sampling Depth, Thermal and Redox Evolution of Spinel Peridotite Xenoliths From Jiaohe, NE China: Insights From Trace Elements in All Rock‐Forming Silicate Minerals

Lin,

Aulbach,

Zheng

et al. 2023

JGR Solid Earth

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Olivine and orthopyroxene (Opx) are the most abundant minerals in lherzolitic to harzburgitic peridotites, and their compositions represent an important – and sometimes only – source of information for the origin and physicochemical evolution of the subcontinental lithospheric mantle (SCLM). We report a high‐quality in‐situ trace element dataset for Opx and olivine of well‐characterized spinel‐peridotite xenoliths, including eight lherzolites and four harzburgites, which were entrained in the Cenozoic basalts from Jiaohe, NE China. While the lherzolites and harzburgites show contrasting evolution involving various metasomatic agents, reflected in different trace element relationships, both experienced early cooling followed by recent (pre‐entrainment) heating, as unraveled by a combination of mineral thermometers with inherently different diffusion rates. The sampling depth of spinel‐facies peridotites is obtained by olivine‐spinel thermobarometry, taking into account post‐melting subsolidus processes and pre‐emplacement thermal disturbance, using an empirical correction for the Ca content in olivine, which yields a pressure range of 1.1–2.0 GPa. The V contents (92–116 µg/g) and V/Sc ratios (5.7–6.4) in lherzolitic Opx are higher than those in harzburgitic Opx (V: 56–76 µg/g; V/Sc: 3.4–5.9), qualitatively reflecting the reducing and oxidizing effect, respectively of refertilization versus metasomatic interaction with a small‐volume melt. Thus, comparative thermobarometry, together with trace element systematics of Opx and olivine can be effective tools to reveal the architecture, chemical, thermal and redox evolution of the shallow SCLM, as sampled by spinel peridotite xenoliths.

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Section: Unraveling the Thermal History And Architecture Of The Shall...mentioning

confidence: 99%

Petrogenesis, Sampling Depth, Thermal and Redox Evolution of Spinel Peridotite Xenoliths From Jiaohe, NE China: Insights From Trace Elements in All Rock‐Forming Silicate Minerals

Lin,

Aulbach,

Zheng

et al. 2023

JGR Solid Earth

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“…As in clinopyroxene, the nature and abundance of atomic impurities in olivine (e.g., Ni, Cr, Ti) are commonly used as petrogenetic indicators, specifically targeting deep crustal and mantle processes such as partial melting or metasomatism (e.g., Ringwood, 1955a, b;O'Reilly et al, 1997;De Hoog et al, 2010;Foley et al, 2013;Sanfilippo et al, 2017;Neave et al, 2018). Atomic impurities are also used as proxies for equilibrium temperature (Ca in olivine and co-existing orthopyroxene) and pressure (Al in olivine; e.g., Brey and Kohler, 1990;Witt-Eickschen and O'Neill, 2005;Coogan et al, 2014;D'Souza et al, 2020;Bussweiler et al, 2017). Thanks to recent technical advances, we can now measure a broad array of atomic impurities in olivine, from heavy (e.g., Th, U, at concentrations > 1 ppb) to light (e.g., Li) elements, by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS; e.g., Tollan et al, 2018;Bussweiler et al, 2019;Batanova et al, 2019;Demouchy and Alard, 2021).…”

Section: Extrinsic Point Defectsmentioning

confidence: 99%

Defects in olivine

Demouchy¹

2021

Eur. J. Mineral.

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Abstract. Olivine, a ferromagnesian orthosilicate, is the most abundant mineral in Earth's upper mantle and is stable down to the olivine–wadsleyite phase transition, which defines the 410 km depth mantle transition zone. Olivine also occurs in crustal environments in metamorphic and hydrothermal rocks and is expected to be the major mineral constituent of the Martian and Venusian mantles. The olivine atomic structure is also used in materials science to manufacture lithium batteries. Like any other crystalline solid, including minerals, olivine never occurs with a perfect crystalline structure: defects in various dimensions are ubiquitous, from point, line, and planar defects to three-dimensional (3-D) inclusions. In this contribution, I review the current state of the art of defects in olivine and several implications for key processes occurring in Earth's mantle. Intrinsic and extrinsic point defects are detailed, exemplifying the astonishing diversity of atomic impurities in mantle-derived olivine. Linear defects, one of the key defect types responsible for ductile deformation in crystalline solids, are examined in light of recent progress in 3-D transmission electron microscopy, which has revealed an important diversity of dislocation slip systems. I summarize the principal characteristics of interface defects in olivine: the free surface, grain and interface boundaries, and internal planar defects. As the least-studied defects to date, interface defects represent an important challenge for future studies and are the main application of numerical simulation methods in materials science. I provide an overview of melt, fluid, and mineral inclusions, which are widely studied in volcanology and igneous petrology. Special attention is given to new crystalline defects that act as deformation agents: disclinations (rotational defects) and the potential occurrence of disconnections in olivine, both of which are expected to occur along or near grain boundaries. Finally, I detail outstanding questions and research directions that will further our understanding of the crystalline specificities and paradoxes of olivine and olivine-rich rocks and ultimately their implications for the dynamics of Earth's upper mantle.

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“…Llovet et al (2012) developed the computer code FANAL, which calculates semi-analytically SF effects in undiffused couples. This code has been shown to accurately predict SF effects when the samples match the geometry assumed in the model (Llovet et al, 2012; Borisova et al, 2018), and it has been used to assess SF effects in a variety of samples (Goodrich et al, 2014; Ackerson et al, 2017; Singerling & Brearley, 2018; Zhang et al, 2018; D'Souza et al, 2020). For more complicated geometries such as particles, inclusions, or lamellae, calculations are difficult and have been rarely addressed.…”

Section: Introductionmentioning

confidence: 99%

“…While the use of experimental data or semi-analytical calculations obtained for undiffused couples is suitable for correcting SF in large crystals, its application to fine-grain minerals is limited (D'Souza et al, 2020). On that account, it is no surprise that FANAL would overestimate the Ti enhancement produced by a small rutile inclusion in a host garnet (Ackerson et al, 2017).…”

Section: Introductionmentioning

confidence: 99%