Brine Infiltration in the Middle to Lower Crust in a Collision Zone: Mass Transfer and Microtexture Development Through Wet Grain–Boundary Diffusion

Higashino, Fumiko; Kawakami, Tetsuo; Tsuchiya, Noriyoshi; Satish-Kumar, M.; Ishikawa, Masahiro; Grantham, G.H.; Sakata, Shuhei; Hirata, Takafumi

doi:10.1093/petrology/egy116

Cited by 10 publications

(4 citation statements)

References 97 publications

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“…Data constraining the intercrystalline REE transport in metamorphic rocks do not exist, but in a few cases, differences in diffusion velocities between LREE and HREE are reported. LREE volume diffusion seems to be significantly slower than HREE volume diffusion in pyroxenes (Van Orman et al, 2001) and, more important for the interpretation of our data, LREE diffuse also slower than HREE during grain boundary diffusion in metal alloys (Higashino et al, 2019;Loewe et al, 2017). Hence, one could argue that the lateral shifts in REE annuli at the outermost parts of metamorphic garnet are developed in a setting with a very limited fluid supply where grain boundary diffusion is the dominant REE transport mechanism.…”

Section: Lateral Peak Shifts: Diffusion-or Reaction-controlled?mentioning

confidence: 59%

Discrimination of thermodynamic and kinetic contributions to the heavy rare earth element patterns in metamorphic garnet

Konrad‐Schmolke

Halama

Chew

et al. 2022

Journal Metamorphic Geology

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Variations of rare earth element (REE) concentrations in metamorphic garnet are an important source of information of geodynamic and geochemical processes in the deeper Earth. In order to extract this information, the thermodynamic equilibrium and kinetic contributions of the REE uptake in garnet must be distinguished and quantified. Utilizing high-resolution trace element and μ-Raman mapping together with combined thermodynamic-geochemicaldiffusion models, we demonstrate that the equilibrium and kinetic aspects of the REE uptake in metamorphic garnet can be discriminated by interpreting 2D trace element mapping in a single sample. The heavy (H) REE (Tb to Lu) zoning in the investigated garnet from a high-pressure blueschist comprises an inner part with an overall decrease from core to inner rim, followed by a concentric zone of HREE enrichment and a drastic HREE decrease towards the outermost rim. The central peak in the garnet core decreases in intensity with

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Section: Lateral Peak Shifts: Diffusion-or Reaction-controlled?mentioning

confidence: 59%

Discrimination of thermodynamic and kinetic contributions to the heavy rare earth element patterns in metamorphic garnet

Konrad‐Schmolke

Halama

Chew

et al. 2022

Journal Metamorphic Geology

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“…Metamorphic rocks in the SRM are commonly retrogressed due to high-temperature duration and postpeak fluid infiltration (e.g., Adachi et al, 2010;Higashino et al, 2019aHigashino et al, , 2019bKawakami et al, 2017). However, this study showed that the UHT metamorphism could be recognized using appropriate geothermometers robust against high-temperature diffusion and fluid infiltration.…”

Section: Discussionmentioning

confidence: 72%

Ultrahigh–temperature metamorphism and melt inclusions from the Sør Rondane Mountains, East Antarctica

Higashino

Kawakami

2022

Journal of Mineralogical and Petrological Sciences

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This paper reports the first outcrop occurrence of an ultrahigh-temperature (UHT) metamorphic rock from the Sør Rondane Mountains (SRM), East Antarctica. A pelitic gneiss from Balchenfjella, eastern SRM, contains mesoperthite that gave UHT condition (>900 °C) by ternary feldspar thermometry. The UHT mesoperthite is present both in the matrix and as an inclusion in garnet. The garnet also has nanogranitoid inclusions next to the mesoperthite, which are interpreted to be an UHT melt. The re-integrated nanogranitoid composition is plotted in the primary phase region of quartz and classified as granite. Even crystallized nanogranitoids can provide appropriate original melt composition in the An-Ab-Or and Qz-Ab-Or spaces, whereas Mg concentration is enriched due to local retrograde Fe-Mg exchange reaction between the nanogranitoid inclusions and the host garnet. Although metamorphic rocks in the SRM are highly retrogressed, this study revealed that the microstructural evidence of UHT condition is partially preserved. Further investigation of timing and areal extent of UHT metamorphism helps us to understand the tectonic model of the SRM.

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“…Prograde to peakmetamorphic saline fluids probably had low δ 18 O as constrained from O isotope zoning recorded in garnet enclosing Cl-rich biotite (Higashino et al, 2019b). Retrograde saline fluid infiltrations are recorded as cracks filled with Cl-rich biotite and/or hornblende (Higashino et al, 2015;2019a). Higashino et al (2023b in…”

Section: A C C E P T E D I N J M P S P R E -P R O O Fmentioning

confidence: 99%

“…The Sør Rondane Mountains is also known as a key area for understanding the fluidrock interactions in collision settings (Higashino et al, 2013(Higashino et al, , 2015(Higashino et al, , 2019a(Higashino et al, , 2019bKawakami et al, 2017;Mindaleva et al, 2020). Traces of saline fluids are found as Cl-rich minerals in the matrix or enclosed in garnet in the granulite facies rocks along the Main Tectonic Boundary bounding the NE and SW Terranes (Higashino et al, 2013(Higashino et al, , 2019a. Prograde to peakmetamorphic saline fluids probably had low δ 18 O as constrained from O isotope zoning recorded in garnet enclosing Cl-rich biotite (Higashino et al, 2019b).…”

Section: A C C E P T E D I N J M P S P R E -P R O O Fmentioning

confidence: 99%

Recent advances in mineralogy, petrology, geochemistry, and geochronology in East Antarctica

HOKADA,

SATISH-KUMAR,

KAWAKAMI

2024

Journal of Mineralogical and Petrological Sciences

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A prolonged crustal history from Archean through Proterozoic to Cambrian, spanning more than half of the Earth's evolution through time is preserved in the rock record in East Antarctica. Geological field studies have been conducted in Dronning Maud Land and Enderby Land of East Antarctica as part of the scientific program of Japanese Antarctic Research Expedition (JARE). Late Neoproterozoic to Cambrian (>600-520 Ma) high-grade metamorphic terranes, developed as major orogenic belts during the Gondwana supercontinent formation, are recognized in central Dronning Maud Land, Sør Rondane Mountains, Belgica and Yamato Mountains (Yamato-Belgica Complex), Lützow-Holm Bay-Prince Olav Coast region (Lützow-Holm Complex) to western Enderby Land (Western Rayner Complex) over 2000 km from west to east along the coast-inland of the Antarctic continent. Relatively narrow and sporadic Meso-Neoproterozoic (1000-900 Ma) high-grade blocks (Hinode Block and Nibannishi Rockgranulite-facies; Akebono Rockamphibolite-facies) are identified in Prince Olav Coast geographically within the Lützow-Holm Complex. Archean high-grade -UHT granulites and gneisses of the Napier Complex represent the largest regional terrain covering 400 x 200 km 2 area in Enderby Land, along with widespread Meso-Neoproterozoic granulite-facies zone of Rayner Complex from Enderby Land through Kemp Land, McRobertson Land toward east to Prydz Bay region. Thus, the continental crustal domain investigated by the Japanese Antarctic expeditions is key in understanding the Archean-Proterozoic-Cambrian deep crustal history and processes. In this special issue we summarize the recent progress in theA c c e p t e d i n J M P S P r e -p r o o f

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Brine Infiltration in the Middle to Lower Crust in a Collision Zone: Mass Transfer and Microtexture Development Through Wet Grain–Boundary Diffusion

Cited by 10 publications

References 97 publications

Discrimination of thermodynamic and kinetic contributions to the heavy rare earth element patterns in metamorphic garnet

Discrimination of thermodynamic and kinetic contributions to the heavy rare earth element patterns in metamorphic garnet

Ultrahigh–temperature metamorphism and melt inclusions from the Sør Rondane Mountains, East Antarctica

Recent advances in mineralogy, petrology, geochemistry, and geochronology in East Antarctica

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