Preprints
https://doi.org/10.5194/egusphere-2022-1487
https://doi.org/10.5194/egusphere-2022-1487
02 Jan 2023
 | 02 Jan 2023

Water release and homogenization by dynamic recrystallization of quartz

Junichi Fukuda, Takamoto Okudaira, and Yukiko Ohtomo

Abstract. To evaluate changes in water distribution generated by dynamic recrystallization of quartz, we performed infrared (IR) spectroscopy mapping of quartz in deformed granite from the Wariyama uplift zone in NE Japan. We analyzed three granite samples with different degrees of deformation: almost undeformed, weakly deformed, and strongly deformed. Dynamically recrystallized quartz grains with a grain size of ~10 µm are found in these three samples, but the percentages of recrystallized grains and recrystallization processes are different. Quartz in the almost undeformed sample shows wavy grain boundaries with a few bulged quartz grains. In the weakly deformed sample, bulging of quartz is developed in regions a few hundred micrometers from adjacent host quartz grains. In the strongly deformed sample, almost all quartz grains are recrystallized by subgrain rotation. IR spectra of quartz in the three samples commonly show a broad water band owing to H2O fluid at 2800–3750 cm−1 with no structural OH bands. Water contents in host quartz grains in the almost undeformed sample are in the range of 40–1750 wt. ppm, with a mean of 500 ± 280 wt. ppm H2O. On the other hand, water contents in regions of recrystallized grains, regardless of the recrystallization processes involved, are in the range of 100–510 wt. ppm, with a mean of 220 ± 70 wt. ppm, which are low and homogeneous compared with contents in host quartz grains. Water contents in regions of subgrains are intermediate between those in host and recrystallized grains. These results for water distribution in quartz imply that water is released by dynamic recrystallization.

Journal article(s) based on this preprint

19 Apr 2023
Water release and homogenization by dynamic recrystallization of quartz
Junichi Fukuda, Takamoto Okudaira, and Yukiko Ohtomo
Solid Earth, 14, 409–424, https://doi.org/10.5194/se-14-409-2023,https://doi.org/10.5194/se-14-409-2023, 2023
Short summary

Junichi Fukuda et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-1487', Anonymous Referee #1, 13 Jan 2023
    • AC1: 'Reply on RC1', Junichi Fukuda, 13 Mar 2023
  • RC2: 'Comment on egusphere-2022-1487', Anonymous Referee #2, 27 Jan 2023
    • AC2: 'Reply on RC2', Junichi Fukuda, 13 Mar 2023
  • RC3: 'Comment on egusphere-2022-1487', Andreas Kronenberg, 31 Jan 2023
    • AC3: 'Reply on RC3', Junichi Fukuda, 13 Mar 2023

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-1487', Anonymous Referee #1, 13 Jan 2023
    • AC1: 'Reply on RC1', Junichi Fukuda, 13 Mar 2023
  • RC2: 'Comment on egusphere-2022-1487', Anonymous Referee #2, 27 Jan 2023
    • AC2: 'Reply on RC2', Junichi Fukuda, 13 Mar 2023
  • RC3: 'Comment on egusphere-2022-1487', Andreas Kronenberg, 31 Jan 2023
    • AC3: 'Reply on RC3', Junichi Fukuda, 13 Mar 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Junichi Fukuda on behalf of the Authors (13 Mar 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (15 Mar 2023) by Federico Rossetti
RR by Andreas Kronenberg (15 Mar 2023)
RR by Anonymous Referee #2 (22 Mar 2023)
ED: Publish subject to technical corrections (22 Mar 2023) by Federico Rossetti
ED: Publish subject to technical corrections (22 Mar 2023) by Federico Rossetti (Executive editor)
AR by Junichi Fukuda on behalf of the Authors (27 Mar 2023)  Author's response   Manuscript 

Journal article(s) based on this preprint

19 Apr 2023
Water release and homogenization by dynamic recrystallization of quartz
Junichi Fukuda, Takamoto Okudaira, and Yukiko Ohtomo
Solid Earth, 14, 409–424, https://doi.org/10.5194/se-14-409-2023,https://doi.org/10.5194/se-14-409-2023, 2023
Short summary

Junichi Fukuda et al.

Junichi Fukuda et al.

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Latest update: 07 Oct 2023
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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
We measured water distributions in deformed quartz by infrared spectroscopy mapping and used the results to discuss changes in water distribution resulting from textural development. Because of the grain size reduction process (dynamic recrystallization), water contents decrease from 40–1750 wt. ppm in host grains of ~500 µm to 100–510 wt. ppm in recrystallized regions composed of fine grains of ~10 µm. Our results indicate that water is released and homogenized by dynamic recrystallization.