Abstract

The Quaternary Kurobegawa Granite, central Japan, is not only the youngest known granitic pluton exposed on the Earth’s surface, it is one of few localities where both Quaternary volcanics and related plutons are well exposed. Here, we present new zircon U–Pb ages together with whole rock and mineral geochemical data, revealing that the Kurobegawa Granite is a resurgent pluton that was emplaced following the caldera-forming eruption of the Jiigatake Volcanics at 1.55 ± 0.09 Ma. Following the eruption, the remnant magma chamber progressively cooled forming the voluminous Kurobegawa pluton in the upper crust (~ 6 km depth) until ~ 0.7 Ma when resurgence caused rapid uplift and erosion in the region. This is the first study to document the detailed spatiotemporal evolution of resurgent pluton for a Quaternary caldera system. Our new findings may contribute significantly to understanding the fate of active caldera systems that can produce supereruptions.

Details

Title
The Quaternary Kurobegawa Granite: an example of a deeply dissected resurgent pluton
Author
Ito Hisatoshi 1 ; Adachi Yoshiko 1 ; Cambeses Aitor 2 ; Bea, Fernando 2 ; Fukuyama Mayuko 3 ; Fukuma Koji 4 ; Yamada Ryuji 5 ; Kubo Takashi 6 ; Takehara Mami 7 ; Horie Kenji 8 

 Central Research Institute of Electric Power Industry, Chiba, Japan (GRID:grid.417751.1) (ISNI:0000 0001 0482 0928) 
 University of Granada, Department of Mineralogy and Petrology, Granada, Spain (GRID:grid.4489.1) (ISNI:0000000121678994) 
 Akita University, Graduate School of Engineering Science, Akita, Japan (GRID:grid.251924.9) (ISNI:0000 0001 0725 8504) 
 Doshisha University, Department of Environmental System Science, Kyotanabe, Japan (GRID:grid.255178.c) (ISNI:0000 0001 2185 2753) 
 National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Japan (GRID:grid.450301.3) (ISNI:0000 0001 2151 1625) 
 Asahi Town Board of Education, Toyama, Japan (GRID:grid.450301.3) 
 National Institute of Polar Research, Tokyo, Japan (GRID:grid.410816.a) (ISNI:0000 0001 2161 5539) 
 National Institute of Polar Research, Tokyo, Japan (GRID:grid.410816.a) (ISNI:0000 0001 2161 5539); The Graduate University for Advanced Studies, SOKENDAI, Department of Polar Sciences, Tokyo, Japan (GRID:grid.275033.0) (ISNI:0000 0004 1763 208X) 
Publication year
2021
Publication date
2021
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2596177377
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.