Hafnium isotope systematics of zircon in high-grade metamorphic rocks of the Anabar shield, Siberia: Radiogenic Hf without mantle input?

Moreira, Hugo; Dhuime, Bruno; Ionov, Dmitri A.; Buzenchi, Anda; Гусев, Н. И.

doi:10.1016/j.chemgeo.2023.121644

Cited by 5 publications

(2 citation statements)

References 106 publications

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“…All samples from the two cratons in this study were previously studied for petrographic characteristics, mineral major and trace element composition (Aulbach et al., 2020; Schmidberger et al., 2007) and Mössbauer‐derived Fe 3+ /ΣFe ratios (Aulbach et al., 2019, 2022). Much of the Siberian craton is unconformably overlain by Phanerozoic sediments and basalts, except on the Aldan and Anabar shields (e.g., Moreira et al., 2023), and underlain by a lithospheric keel that has yielded Paleoproterozoic and Archean ages, as determined for peridotite xenoliths entrained in Devonian and Cretaceous kimberlites (Doucet et al., 2015; Ionov, Carlson, et al., 2015; Ionov, Doucet, et al., 2015; Ionov et al., 2020; Pearson, Shirey, et al., 1995) as well as crustal xenoliths (e.g., Moyen et al., 2017) and outcrops (Moreira et al., 2023). Eclogites form part of these xenolith suites, and have been dated to 2.9–2.7 Ga, suggesting emplacement during collision of cratonic nuclei and consumption of intervening ocean basins (Jacob et al., 1994; Pearson, Snyder, et al., 1995).…”

Section: Geological Background Samples and Prior Workmentioning

confidence: 99%

Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO₂ Controls, Retentivity, and Implications for Electrical Conductivity and Deep H₂O Recycling

Aulbach,

Stalder,

Massuyeau

et al. 2023

Geochem Geophys Geosyst

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Kimberlite‐borne eclogite xenoliths having Precambrian oceanic crustal protoliths and entrained from ≥100 km depth can retain pristine geochemical features despite extended residence in the cratonic lithospheric mantle, making them valuable archives of deep chemical cycling including that of water. We determined, by Fourier Transform Infrared Spectroscopy, structural OH contents in clinopyroxene and garnet from 15 unmetasomatized eclogite xenoliths. Calculated total c(H2O) is 100–510 wt.ppm for clinopyroxene and below detection (∼2 wt.ppm) to 200 wt.ppm for garnet, while garnet δ18O, determined by Secondary Ion Mass Spectrometry, ranges from +5.0‰ to +7.3‰, (similar to high‐ and low‐temperature seawater‐altered oceanic crust). Estimated electrical conductivity in pristine eclogites increases with temperature (i.e., depth for conductive geotherms), while clinopyroxene‐garnet H2O partition coefficients decrease with increasing temperature and garnet grossular component (i.e., Ca#), similar to other incompatible components. Various considerations suggest the retention of primary H2O in the samples, likely occurring in km‐sized pods of coarse‐grained eclogite. High Al2O3 in clinopyroxene as omphacite component, stabilized during high‐pressure metamorphism, facilitates H2O uptake. Therefore, the high bulk c(H2O) estimated for samples with plagioclase‐rich, deep crustal protoliths (median 290 wt.ppm) may indicate an interaction with fluids expelled at depth from serpentinites. The c(H2O) of ancient and modern subducted bulk oceanic crust (∼220–240 wt.ppm) are similar, suggesting constant mantle ingassing since at least 3 Ga ago. This places constraints on factors, such as mantle temperatures, that determine the efficiency of deep water cycling.

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Section: Geological Background Samples and Prior Workmentioning

confidence: 99%

Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO₂ Controls, Retentivity, and Implications for Electrical Conductivity and Deep H₂O Recycling

Aulbach,

Stalder,

Massuyeau

et al. 2023

Geochem Geophys Geosyst

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“…If the sedimentary rock is subjected to increased pressure and temperature as a result of stockpiling and or involved in the process of mountain formation (El Alami et al, 2022), then the sedimentary rock will undergo changes to adapt to the new environment, and formed malihan rock or metamorphic rock. If this metamorphic rock is still subjected to increased pressure and temperature, it will melt again and turn into magma (Moreira et al, 2023). The rock cycle shows that the course of the cycle can be interrupted by the existence of shortcuts that can be taken, such as from igneous rocks to metamorphic rocks, or metamorphic rocks to sediments without going through the formation of magma and igneous rocks.…”

Section: The Process Of Rock Formation At Bukit Cintamentioning

confidence: 99%

Elements of Metamorphic Rocks (Marble and Quartzite) of Bukit Cinta Gunung Gajah, Klaten

Hiryanto,

Sujarwo,

Tristanti

et al. 2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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Rocks such as metamorphic and sedimentary are natural constructions. Rocks in natural construction become elementary materials that form the landscape of the area, including in nature-based tourism objects, Bukit Cinta in Gunung Gajah, Klaten, Central Java. The purpose of this research is to describe the elements of rocks in the place. The study method used is descriptive qualitative method and tends to use analysis. The theoretical basis is used as a basic reference in preparing the study report to match the conditions in the field. In addition, the theoretical basis can also provide an overview of the background of the study as material for discussion. The ability to collect data is an important factor in determining the validation of the study conducted. Data collection in this case is obtained secondarily, namely through documents or literature studies. The results of the study found that there are 3 main supporters for the strong landscape in the tourist ojek of Gunung Gajah love hill. The three are metamorphic rocks observed there are fillic metamorphic relief, marble metamorphic rocks, and quartzite metamorphic rocks; limestone sedimentary rocks. Limestone can be used for building materials, road paving, and house foundations; and Diorte igneous rocks. Diorte igneous rocks can be used as home decoration.

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Reconstructions of mantle structure beneath the Anabar Shield kimberlites – Similarities and differences

Aschepkov,

Kostrovitsky,

Babushkina

et al. 2024

Geosystems and Geoenvironment

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Hafnium isotope systematics of zircon in high-grade metamorphic rocks of the Anabar shield, Siberia: Radiogenic Hf without mantle input?

Cited by 5 publications

References 106 publications

Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO₂ Controls, Retentivity, and Implications for Electrical Conductivity and Deep H₂O Recycling

Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO₂ Controls, Retentivity, and Implications for Electrical Conductivity and Deep H₂O Recycling

Elements of Metamorphic Rocks (Marble and Quartzite) of Bukit Cinta Gunung Gajah, Klaten

Reconstructions of mantle structure beneath the Anabar Shield kimberlites – Similarities and differences

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Hafnium isotope systematics of zircon in high-grade metamorphic rocks of the Anabar shield, Siberia: Radiogenic Hf without mantle input?

Cited by 5 publications

References 106 publications

Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO2 Controls, Retentivity, and Implications for Electrical Conductivity and Deep H2O Recycling

Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO2 Controls, Retentivity, and Implications for Electrical Conductivity and Deep H2O Recycling

Elements of Metamorphic Rocks (Marble and Quartzite) of Bukit Cinta Gunung Gajah, Klaten

Reconstructions of mantle structure beneath the Anabar Shield kimberlites – Similarities and differences

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Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO₂ Controls, Retentivity, and Implications for Electrical Conductivity and Deep H₂O Recycling

Water in Omphacite and Garnet From Pristine Xenolithic Eclogite: T‐X‐fO₂ Controls, Retentivity, and Implications for Electrical Conductivity and Deep H₂O Recycling