{"title":"Zircon U–Pb ages of the Higo plutonic complex: Implication for migration of Cretaceous igneous activity in Kyushu, southwest Japan","authors":"Yukiyasu Tsutsumi","doi":"10.1111/iar.12446","DOIUrl":null,"url":null,"abstract":"<p>Zircon U–Pb weighted mean ages of seven samples from the Higo plutonic complex (HPC) in Kyushu were determined as follows; Shiraishino granodiorite: 109.3 ± 0.9 Ma and 109.0 ± 1.1 Ma; Kugushima granodiorite: 109.1 ± 1.1 Ma; Miyanohara tonalite: 107.7 ± 1.3 Ma and 108.3 ± 0.9 Ma; Manzaka tonalite: 108.0 ± 0.9 Ma; Joyama tonalite: 112.7 ± 1.2 Ma. The plutonism of batholithic granitoids in the HPC occurred in 109–108 Ma, and granitic intrusions occurred in 113 Ma. The previously reported zircon U–Pb ages range from 107 to 98 Ma in northern Kyushu and concentrate around about 106 Ma in the Chikuhi area in the northern part of central Kyushu. The previously published age data and newly obtained data in this study demonstrate that Cretaceous igneous activity in Kyushu migrated northward from 114 to 98 Ma, accompanied by widespread igneous activity throughout central and northern Kyushu at 106–105 Ma. The HPC situated in the southernmost part of central Kyushu was the origin of this northward migration.</p>","PeriodicalId":14791,"journal":{"name":"Island Arc","volume":"31 1","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Island Arc","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/iar.12446","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 1
Abstract
Zircon U–Pb weighted mean ages of seven samples from the Higo plutonic complex (HPC) in Kyushu were determined as follows; Shiraishino granodiorite: 109.3 ± 0.9 Ma and 109.0 ± 1.1 Ma; Kugushima granodiorite: 109.1 ± 1.1 Ma; Miyanohara tonalite: 107.7 ± 1.3 Ma and 108.3 ± 0.9 Ma; Manzaka tonalite: 108.0 ± 0.9 Ma; Joyama tonalite: 112.7 ± 1.2 Ma. The plutonism of batholithic granitoids in the HPC occurred in 109–108 Ma, and granitic intrusions occurred in 113 Ma. The previously reported zircon U–Pb ages range from 107 to 98 Ma in northern Kyushu and concentrate around about 106 Ma in the Chikuhi area in the northern part of central Kyushu. The previously published age data and newly obtained data in this study demonstrate that Cretaceous igneous activity in Kyushu migrated northward from 114 to 98 Ma, accompanied by widespread igneous activity throughout central and northern Kyushu at 106–105 Ma. The HPC situated in the southernmost part of central Kyushu was the origin of this northward migration.
期刊介绍：
Island Arc is the official journal of the Geological Society of Japan. This journal focuses on the structure, dynamics and evolution of convergent plate boundaries, including trenches, volcanic arcs, subducting plates, and both accretionary and collisional orogens in modern and ancient settings. The Journal also opens to other key geological processes and features of broad interest such as oceanic basins, mid-ocean ridges, hot spots, continental cratons, and their surfaces and roots. Papers that discuss the interaction between solid earth, atmosphere, and bodies of water are also welcome. Articles of immediate importance to other researchers, either by virtue of their new data, results or ideas are given priority publication.
Island Arc publishes peer-reviewed articles and reviews. Original scientific articles, of a maximum length of 15 printed pages, are published promptly with a standard publication time from submission of 3 months. All articles are peer reviewed by at least two research experts in the field of the submitted paper.
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