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Journal Articles

Low-temperature thermochronology of active arc-arc collision zone, South Fossa Magna region, central Japan

Sueoka, Shigeru; Kobayashi, Yumi*; Fukuda, Shoma; Kohn, B. P.*; Yokoyama, Tatsunori; Sano, Naomi*; Hasebe, Noriko*; Tamura, Akihiro*; Morishita, Tomoaki*; Tagami, Takahiro*

Tectonophysics, 828, p.229231_1 - 229231_17, 2022/04

 Times Cited Count:0 Percentile:0.01(Geochemistry & Geophysics)

The South Fossa Magna zone, central Japan, has been an active collision zone between the Honshu Arc and the Izu-Bonin Arc since the middle Miocene and provides an excellent setting for reconstructing the earliest stages of continent formation. Multi-system geo-thermochronometry was applied to different domains of the South Fossa Magna zone, together with some previously published data, to reveal mountain formation processes, i.e., vertical crustal movements. Nine granitic samples yielded zircon U-Pb ages of 10.2-5.8 Ma ($$n$$ = 2), apatite (U-Th)/He (AHe) ages of 42.8-2.6 Ma ($$n$$ = 7), and apatite fission-track (AFT) ages of 44.1-3.0 Ma ($$n$$ = 9). Thermal history inversion modeling based on the AHe and AFT data suggested rapid cooling events confined within the study region at $$sim$$6-2 Ma. The Kanto Mountains may have undergone a domal uplift in association with their collision with the Tanzawa Block at $$sim$$5 Ma. However, this uplift may have slowed down following the migration of the plate boundary and late Pliocene termination of the Tanzawa collision. The Minobu Mountains and possibly adjacent mountains may have been uplifted by the motional change of the Philippine Sea plate at $$sim$$3 Ma. Therefore, the mountain formation in the South Fossa Magna zone was mainly controlled by collisions of the Tanzawa and Izu Blocks and motional change of the Philippine Sea plate. Earlier collisions of the Kushigatayama Block at $$sim$$13 Ma and Misaka Block at $$sim$$10 Ma appeared to have had little effect on mountain formation. Together with a $$sim$$90 deg. clockwise rotation of the Kanto Mountains at 12-6 Ma, these observations suggest that horizontal deformation predominated during the earlier stage of arc-arc collision, and vertical movements due to buoyancy resulting from crustal shortening and thickening developed at a later stage.

Journal Articles

Exploration of the age standard zircon for (U-Th)/He method; Chronometric investigations of the Nisatai Dacite

Fukuda, Shoma; Sueoka, Shigeru; Kanno, Mizuho; Kohn, B. P.*; Tagami, Takahiro*

Fisshion, Torakku Nyusureta, (34), p.9 - 13, 2021/12

In order to explore suitable zircon samples as standard minerals for the zircon (U-Th)/He (namely, ZHe) method, we have attempted to conduct ZHe analyses of the Nisatai dacite sampled in Iwate prefecture. Previous researches reported solid ages at 22-21 Ma and a rapid cooling pattern based on various geochronometric investigations, which inferred a potential of an age standard for ZHe method. Consequently, ZHe ages in this study yielded at 21.5 $$pm$$ 0.2 Ma having wide dispersion of grain ages from 40 Ma to 15 Ma, probably caused by random errors. As possible causes of age dispersion, the zoning of parent nuclei in a crystal and the heterogeneous rock pieces revealed by observations of thin-section are considerable. Therefore, the Nisatai dacite was concluded as unsuitable sample for the ZHe age standard. However, geochronologic data of other methods showed comparable ages such as zircon fission-track and U-Pb method, the Nisatai dacite may be used as these age standards. We will continue to explore another candidates for ZHe age standard, e.g., U-Pb age standards.

Journal Articles

Estimation of the uplift/denudation history in Kitakami Mountains by thermochronology

Kajita, Yuya*; Fukuda, Shoma; Sueoka, Shigeru; Hasebe, Noriko*; Tamura, Akihiro*; Morishita, Tomoaki*; Kohn, B. P.*; Tagami, Takahiro*

Fisshion, Torakku Nyusureta, (33), p.28 - 30, 2020/10

no abstracts in English

Journal Articles

(U-Th)/He thermochronometric mapping across the northeast Japan Arc; Towards understanding mountain building in an island-arc setting

Fukuda, Shoma*; Sueoka, Shigeru; Kohn, B. P.*; Tagami, Takahiro*

Earth, Planets and Space (Internet), 72(1), p.24_1 - 24_19, 2020/02

 Times Cited Count:2 Percentile:26.9(Geosciences, Multidisciplinary)

no abstracts in English

Journal Articles

Uplift and denudation history of the Akaishi Range, a thrust block formed by arc-arc collision in central Japan; Insights from low-temperature thermochronometry and thermokinematic modeling

Sueoka, Shigeru; Ikeda, Yasutaka*; Kano, Kenichi*; Tsutsumi, Hiroyuki*; Tagami, Takahiro*; Kohn, B. P.*; Hasebe, Noriko*; Tamura, Akihiro*; Arai, Shoji*; Shibata, Kenji*

Journal of Geophysical Research; Solid Earth, 122(8), p.6787 - 6810, 2017/08

no abstracts in English

Journal Articles

Thermochronological contribution to the Crustal Dynamics Project

Tagami, Takahiro*; Sueoka, Shigeru; Kohn, B. P.*; Fukuda, Shoma*

Fisshion, Torakku Nyusureta, (29), p.1 - 2, 2016/12

no abstracts in English

Oral presentation

Uplift and denudation history of the Akaishi Range based on low-temperature thermochronology and thermo-kinematic model

Sueoka, Shigeru; Ikeda, Yasutaka*; Kano, Kenichi*; Tsutsumi, Hiroyuki*; Tagami, Takahiro*; Kohn, B. P.*; Hasebe, Noriko*; Tamura, Akihiro*; Arai, Shoji*; Shibata, Kenji*

no journal, , 

no abstracts in English

Oral presentation

Low-temperature thermochronology of Cretaceous granitoids from the northern Northeast Japan Arc; Towards reconstructing arc-parallel thermal/denudation histories

Fukuda, Shoma*; Sueoka, Shigeru; Kohn, B. P.*; Hasebe, Noriko*; Tamura, Akihiro*; Morishita, Tomoaki*; Tagami, Takahiro*

no journal, , 

no abstracts in English

Oral presentation

Uplift and denudation history of the South Fossa Magna region using low-temperature thermochronometric methods

Kobayashi, Yumi*; Sueoka, Shigeru; Fukuda, Shoma*; Kohn, B. P.*; Yokoyama, Tatsunori; Hasebe, Noriko*; Tamura, Akihiro*; Morishita, Tomoaki*; Tagami, Takahiro*

no journal, , 

no abstracts in English

Oral presentation

Thermochronology on the fore-arc side of Northeast Japan Arc

Kajita, Yuya*; Sueoka, Shigeru; Fukuda, Shoma*; Hasebe, Noriko*; Tamura, Akihiro*; Morishita, Tomoaki*; Kohn, B. P.*; Yokoyama, Tatsunori; Tagami, Takahiro*

no journal, , 

no abstracts in English

Oral presentation

Uplift/denudation histories around the Tanigawa-dake region based on (U-Th)/He thermochronometries

Minami, Saki*; Sueoka, Shigeru; Kohn, B. P.*; Fukuda, Shoma; Kajita, Yuya*; Ogita, Yasuhiro; Tagami, Takahiro*

no journal, , 

no abstracts in English

Oral presentation

Uplift and denudation histories in Kitakami Mountains since the Cretaceous based on thermochronology

Kajita, Yuya*; Sueoka, Shigeru; Fukuda, Shoma; Yokoyama, Tatsunori; Kagami, Saya; Nagata, Mitsuhiro; Kohn, B. P.*; Tagami, Takahiro*

no journal, , 

no abstracts in English

Oral presentation

Low-temperature thermochronology of the Izu collision zone, central Japan; Implications for mountain building at an active arc-arc collision zone

Sueoka, Shigeru; Kobayashi, Yumi*; Fukuda, Shoma; Kohn, B. P.*; Yokoyama, Tatsunori; Sano, Naomi*; Hasebe, Noriko*; Tamura, Akihiro*; Morishita, Tomoaki*; Tagami, Takahiro*

no journal, , 

Multi-system thermochronometries were applied to the Izu collision zone, an active arc-arc collision zone in the central Japan, in order to reveal the mountain formation process. Nine granitic samples yielded zircon U-Pb ages of 10.2-5.8 Ma (n = 2), apatite (U-Th)/He ages of 42.8-2.6 Ma (n = 7), and apatite fission-track (AFT) ages of 44.1-3.0 Ma (n = 9). Thermal inversion analyses based on the AFT data suggest rapid cooling events at ca 5 Ma and 1 Ma in the collision zone and no such thermal/tectonic effect out of the zone. The Kanto Mountains are thought to be uplifted domally associated with the collision of the Tanzawa Block at ca 5 Ma. The Minobu Mountains and possibly the adjacent mountains could be uplifted by the collision of the Izu Block at ca 1 Ma. Mountain formation in the Izu collision zone is mainly controlled by the collisions of crustal blocks of the Izu-Bonin Arc and motional change of the Philippine Sea plate.

Oral presentation

Thermal/denudation histories in the Tanigawa-dake region based on multi-thermochronometries

Minami, Saki*; Sueoka, Shigeru; Fukuda, Shoma; Nagata, Mitsuhiro; Kohn, B. P.*; Yokoyama, Tatsunori; Kagami, Saya; Kajita, Yuya*; Tagami, Takahiro*

no journal, , 

14 (Records 1-14 displayed on this page)
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