Island Arc

Island Arc Island Arc is the official journal of the Geological Society of Japan.

19/11/2025

New for Island Arc:
The Significant Role of the Mafic Lower Crust in the Chemical Diversity of Arc Magmas
Masao Ban, Jun-Ichi Kimura, Toshiro Takahashi, Yuka Hirahara, Tsukasa Ohba, Akihiko Fujinawa, Shintaro Hayashi, Takeyoshi Yoshida, Takashi Miyazaki, Nobutaka Tsuchiya, Shin-ichi Kagashima, Qing Chang, Ryoko Senda, Bogdan Stefanov Vaglarov, Yoshiyuki Tatsumi
First published: 20 October 2025
https://doi.org/10.1111/iar.70033

19/11/2025

New for Island Arc:
Thermal Structure Around the Shibukawa Ultramafic Body of the Mikabu Greenstones in the Low-Grade Sanbagawa Schists, Northwest Shizuoka, Central Japan
Seira Katagiri, Yui Kouketsu, Katsuyoshi Michibayashi
First published: 22 September 2025
https://doi.org/10.1111/iar.70034

19/11/2025

New for Island Arc:
Early Miocene Fore-Arc Magmas Derived From Subcontinental Lithospheric Mantle During the Japan Sea Opening: Geochemistry of the Ishimoriyama and Iritono Volcanic Rocks in the Iwaki District, NE Japan
Takahiro Yamamoto
First published: 20 August 2025
https://doi.org/10.1111/iar.70032

19/11/2025

New for Island Arc:
Slab Tear Beneath the Sunda Strait
Luhut Pardamean Siringoringo, Benyamin Sapiie, Alfend Rudyawan, I Gusti Bagus Eddy Sucipta
First published: 18 August 2025
https://doi.org/10.1111/iar.70031

19/11/2025

New for Island Arc:
Origin of Amphibole Cumulates at the Base of an Exposed Arc Crustal Section: Perspectives From Fiordland, New Zealand
Patrick Manselle, Stephen Foley, Nathan Daczko
First published: 13 August 2025
https://doi.org/10.1111/iar.70030

19/11/2025

New for Island Arc:
Large Contact Aureole Overprinting the Ryoke Regional Metamorphic Zoning: Insights From the Takato–Komagane Area, Central Japan
Takuro Yoshioka, Hideo Takagi, Hiroyuki Nagahama, Tomoki Taguchi
First published: 05 August 2025
https://doi.org/10.1111/iar.70027

19/11/2025

New for Island Arc:
Microstructural Characteristics of Sheared Gabbroic Rocks From the Mado Megamullion, Shikoku Basin, Philippine Sea
Kohei Nimura, Katsuyoshi Michibayashi, Yumiko Harigane, Yasuhiko Ohara
First published: 03 August 2025
https://doi.org/10.1111/iar.70029

19/11/2025

New for Island Arc:
Holocene Precipitation Change Recorded in Stalagmite Carbon Isotopes and Mg/Ca Ratios in the Pacific Coastal Area of Central Japan
Akira Murata, Taiki Mori, Hirokazu Kato, Fumito Shiraishi, Kenji Kashiwagi, Akihiro Kano
First published: 28 July 2025
https://doi.org/10.1111/iar.70025

19/11/2025

New for Island Arc:
Holocene Paleoenvironment Changes Near Lake Funazoko-Ike, East Antarctica, Based on Analyses of Sediments and Microfossils
Satoshi Sasaki, Koji Seto, Kota Katsuki
First published: 28 July 2025
https://doi.org/10.1111/iar.70026

19/11/2025

New for Island Arc:
Ages and Geochemistry of Igneous Rocks in the Northern Sierra Madre-Caraballo Mountains, Philippines: Implications for Subduction Reconstruction Beneath Northern Luzon
Yikai Yang, Mengming Yu, Graciano P. Yumul Jr., Karlo L. Queaño, Carla B. Dimalanta, Peijun Qiao, Lei Shao
First published: 24 July 2025
https://doi.org/10.1111/iar.70028

18/07/2025

New for Island Arc:
Tectono-Magmatic and Metamorphic Evolution of the Shillong Back-Arc Basin in the Assam-Meghalaya Gneissic Complex, Northeast India
Deepshikha Borah, Hiredya Chauhan, Bibhuti Gogoi
First published: 30 June 2025
https://doi.org/10.1111/iar.70023

18/07/2025

New for Island Arc:
Low-Pressure and High-Temperature Type Metamorphism on the Suo Belt From Ozushima Island, Seto Inland Sea Area, Yamaguchi Prefecture, Southwest Japan: Evidence From Detrital Zircon U–Pb Dating and Mineral Paragenesis
Zejin Lu, Masaaki Owada
First published: 28 June 2025
https://doi.org/10.1111/iar.70024

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