Mineral inclusions are not immutable: Evidence of post-entrapment thermally-induced shape change of quartz in garnet

Cesare, Bernardo; Parisatto, Matteo; Mancini, Lucia; Peruzzo, L.; Franceschi, Marco; Tacchetto, Tommaso; Reddy, Steven M.; Spiess, Richard; Nestola, Fabrizio; Marone, Federica

doi:10.1016/j.epsl.2020.116708

Cited by 29 publications

(31 citation statements)

References 58 publications

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“…The maximum temperatures from previous studies (Catalina: ∼650-750 • C), and the textural evidence of hornblende statically overprinting clinopyroxene (PG10, this study), suggests that rocks from Catalina reached high enough temperatures such that some intracyrstalline plasticity in garnet is possible at geologic strain rates based on existing flow laws (Wang and Ji 1999), or thermally induced shape changes of quartz may affect qtz-in-grt barometry results (Cesare et al 2021). We observe no macro-scale textural evidence for dislocation activity in garnet (based on micrographs); and an EBSD map of Garnet 1 (PG10, Supplementary Figure S2) shows no evidence for micro-scale intracrystalline plasticity adjacent to formerly pressurized inclusions where differential stresses between the inclusion and host are highest (Dabrowski et al 2015;Zhong et al 2020b;.…”

Section: Garnet Zonation and Pressures From A Catalina Eclogitesupporting

confidence: 54%

“…We observe no macro-scale textural evidence for dislocation activity in garnet (based on micrographs); and an EBSD map of Garnet 1 (PG10, Supplementary Figure S2) shows no evidence for micro-scale intracrystalline plasticity adjacent to formerly pressurized inclusions where differential stresses between the inclusion and host are highest (Dabrowski et al 2015;Zhong et al 2020b;. However, we cannot rule out that quartz underwent shape changes that are imposed by the host morphology (Cesare et al 2021). The good agreement between P trap results from this study and previous P constraints also suggests that viscous creep of garnet and quartz shape changes were negligible.…”

Section: Garnet Zonation and Pressures From A Catalina Eclogitementioning

confidence: 70%

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Quartz-in-garnet barometry constraints on formation pressures of eclogites from the Franciscan Complex, California

Cisneros

Platt

Anczkiewicz

2022

Contrib Mineral Petrol

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Determining pressure and temperature variations between high-pressure/low-temperature (HP–LT) eclogite blocks is crucial for constraining end-member exhumation models; however, it has historically been challenging to constrain eclogite pressures due to the high variance associated with this bulk-rock composition. In this work, we utilize quartz-in-garnet elastic barometry to constrain formation pressures of eclogites from the northern (Junction School, Ring Mountain, Jenner Beach) and southern Franciscan Complex (Santa Catalina Island). Multiple eclogite blocks from Jenner Beach are analyzed, and a single eclogite from the other localities. By comparing garnet growth conditions from within a single outcrop and between distinct outcrops, we evaluate the local and regional spatial distribution of P conditions recorded by eclogites. We compare the mean, median, and max pressures between different garnet zones and eclogites. Pressures sometimes exhibit systematic changes across garnet zones; however, some eclogites exhibit no systematic pressure variations across garnet zones. Pressures from northern Franciscan eclogites range from $$\sim $$ ∼ 1.4–1.8 GPa, at an estimated temperature of 500 $$^{\circ }$$ ∘ C; pressures from the Catalina eclogite range from $$\sim $$ ∼ 1.2–1.5 GPa, at an estimated temperature of 650 $$^{\circ }$$ ∘ C. Mean and maximum pressures of different eclogites from the northern Franciscan exhibit negligible differences (< 0.1 GPa). The results are inconsistent with models that propose exhumation of metamorphic blocks from different structural levels, and suggest that now exposed HP–LT eclogites from the northern Franciscan Complex may represent rocks that were coherently underplated, and exhumed from similar structural levels.

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Section: Garnet Zonation and Pressures From A Catalina Eclogitesupporting

confidence: 54%

Section: Garnet Zonation and Pressures From A Catalina Eclogitementioning

confidence: 70%

Quartz-in-garnet barometry constraints on formation pressures of eclogites from the Franciscan Complex, California

Cisneros

Platt

Anczkiewicz

2022

Contrib Mineral Petrol

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“…The advantage of pore network modeling is that it enables flow simulation at the pore scale that is not considered by conventional basin-modeling methods [28]. The geometric model is the static part of the pore network model [29]. By extracting information from the real core image or generating it randomly by an algorithm, the pore and throat elements in porous media are simplified into geometrical shapes such as spherical, cylindrical or triangular prisms, which are easy to calculate and approximate to represent the complex porous media [30].…”

Section: Introductionmentioning

confidence: 99%

Microscale Evaluation of Tight Oil Mobility: Insights from Pore Network Simulation

et al. 2021

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Pore network modeling based on digital rock is employed to evaluate the mobility of shale oil in Qingshankou Formation, Songliao Basin, China. Computerized tomography technology is adopted in this work to reconstruct the digital rock of shale core. The pore network model is generated based on the computerized tomography data. We simulate the dynamics of fluid flow in a pore network model to evaluate the mobility of fluid in shale formation. The results show that the relative permeability of oil phase increases slowly in the initial stage of the displacement process, which is mainly caused by the poor continuity of the oil phase. In the later stages, with the increase in the oil phase continuity, the range of relative permeability increases. With the increase of organic matter content, the permeability of the water phase remains unchanged at low water saturation, but gradually increases at high water saturation. At the same time, it can be seen that, with the increase in organic matter content, the isosmotic point of the oil–water phase permeability shifts to the left, indicating that the wettability to water phase gradually weakens.

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“…Elastic thermobarometric models are based on the premise that, in the absence of viscous reequilibration, isolated mineral inclusions retain elastic strains and stresses that can be used to calculate the P ‐ T conditions of entrapment within the host mineral (cf., Ferrero & Angel, 2018). If viscous relaxation of the strains or thermally induced shape change of the inclusion occurred during the metamorphic history, of course the determined strains will indicate the P ‐ T conditions of the last elastic reequilibration event (e.g., Alvaro et al., 2020; Baldwin et al., 2021; Cesare et al., 2021; Moulas et al., 2020). Because of the near ubiquity of mineral inclusions, elastic thermobarometry has been applied to a variety of tectonic and petrologic problems such as garnet growth during subduction zone metamorphism (Ashley et al., 2014; Gonzalez et al., 2020), elastic reequilibration of inclusion strains (Alvaro et al., 2020; Baldwin et al., 2021; Zhong et al., 2018), and thermodynamic reaction overstepping (Spear & Wolfe, 2020; Spear et al., 2014).…”

Section: Introductionmentioning

confidence: 99%

“…last elastic reequilibration event (e.g., Alvaro et al, 2020;Baldwin et al, 2021;Cesare et al, 2021;Moulas et al, 2020). Because of the near ubiquity of mineral inclusions, elastic thermobarometry has been applied to a variety of tectonic and petrologic problems such as garnet growth during subduction zone metamorphism (Ashley et al, 2014;Gonzalez et al, 2020), elastic reequilibration of inclusion strains (Alvaro et al, 2020;Baldwin et al, 2021;Zhong et al, 2018), and thermodynamic reaction overstepping Spear et al, 2014).…”

mentioning

confidence: 99%

Elastic Geobarometry for Anisotropic Inclusions in Anisotropic Host Minerals: Quartz‐in‐Zircon

et al. 2021

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Solid mineral inclusions entrapped within a host mineral can retain physical and chemical information from the pressure (P)-temperature (T) conditions of entrapment and evolution during subsequent metamorphism. In addition to conventional thermobarometric methods (i.e., exchange thermobarometry, equilibrium assemblage modeling, etc.), application of elastic models to determine the metamorphic conditions of inclusion entrapment have become commonly used petrologic methods (e.g.,

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Mineral inclusions are not immutable: Evidence of post-entrapment thermally-induced shape change of quartz in garnet

Cited by 29 publications

References 58 publications

Quartz-in-garnet barometry constraints on formation pressures of eclogites from the Franciscan Complex, California

Quartz-in-garnet barometry constraints on formation pressures of eclogites from the Franciscan Complex, California

Microscale Evaluation of Tight Oil Mobility: Insights from Pore Network Simulation

Elastic Geobarometry for Anisotropic Inclusions in Anisotropic Host Minerals: Quartz‐in‐Zircon

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