| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-10-03 |
| タイトル |
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|
タイトル |
Crystallization processes of quartz in a granitic magma: Implications for the magma chamber processes of Okueyama granite, Kyushu, Japan |
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言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
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主題 |
Quartz, Cathodoluminescence characterization, Oscillatory zonation, TitaniQ thermometer, Diffusion-controlled growth, Okueyama granite |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Takashi, Yuguchi
Takenori, Kato
Yasuhiro, Ogita
Minori, Watanabe
Hayoto, Yamazaki
Asuka, Kato
Daichi, Itoh
Tatsunori, Yokoyama
Shuhei, Sakata
Takeshi, Ohno
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| 内容記述 |
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内容記述タイプ |
Abstract |
|
内容記述 |
Cathodoluminescence (CL) characterization combined with titanium concentration of quartz crystals in granite is a prevalent tool for elucidating the crystal growth of quartz in granitic magmas. The CL pattern yields to the internal structure, and the titanium concentration allows crystallization temperature determination based on TitaniQ geothermometry. Using two approaches, 1) observations of quartz crystals using thin sections and 2) observations based on multiple sections of separated quartz, we identified the overall characteristics of quartz crystals within a magma chamber and the 3D internal structure and growth characteristics of quartz grains. Thin section observations allow for the characterization of quartz containing zircon inclusions, indicating that zircon crystallization was followed by quartz crystallization; therefore, the onset of quartz crystallization occurred later than the onset of zircon crystallization in the cooling magma chamber. Such petrological restrictions permit allow for suitable geothermometer use and appropriate TiO2 activity estimation, and thus, accurate quartz crystallization temperature determination. Observations using multiple sections of separated quartz crystals provide 3D internal structures and true onset parts within the grains. Progressive variation in local activities of TiO2 in the concentration boundary layer at the growing quartz crystal interface in the magma chamber can be evaluated using a combination of the crystallization temperature and variations in titanium concentration within the grain, yielding a sequential crystallization model of oscillatory zoning quartz with local activities of TiO2 in the cooling magma chamber. The difference in CL characteristics and crystallization temperature among the lithofacies in granite contributes to clarifying the spatiotemporal magma chamber processes. |
| bibliographic_information |
en : Journal of Asian Earth Sciences
巻 265,
p. 106091,
発行年 2024-04-15
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| item_16_source_id_7 |
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収録物識別子 |
1367-9120 |
| item_16_relation_11 |
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関連タイプ |
isVersionOf |
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関連識別子 |
https://doi.org/10.1016/j.jseaes.2024.106091 |
| 権利 |
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権利情報 |
(C) 2024 Elsevier Ltd. All rights reserved. |
| 権利 |
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|
権利情報 |
This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| 出版タイプ |
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|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
| 出版者 |
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|
出版者 |
Elsevier |
10.1016_j.jseaes.2024.106091.pdf (142 MB)
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