Zircon U–Pb age of granitoids in the Maizuru Belt, southwest Japan and the southernmost Khanka Massif, Far East Russia
Zircon U–Pb age of granitoids in the Maizuru Belt, southwest Japan and the southernmost Khanka Massif, Far East Russia
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DOI：
10.2465/jmps.131017
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发表时间：
2014
影响因子：
0.7
通讯作者：
Y. Tsutsumi;K. Yokoyama;S. A. Kasatkin;V. Golozubov
中科院分区：
文献类型：
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作者：
Y. Tsutsumi;K. Yokoyama;S. A. Kasatkin;V. Golozubov
日本西南部的Maizuru带和俄罗斯远东的khanka地块包括志罗-泥盆纪和二叠纪-三叠纪花岗岩。为了阐明麦祖鲁带和汗卡地块花岗岩类岩浆活动的同时性，我们对麦祖鲁带北部的麦祖鲁地区和坎卡地块最南端的符拉迪沃斯托克地区的花岗岩样品进行了锆石U-Pb年龄研究。符拉迪沃斯托克地区5个花岗岩样品的年龄分别为422.2±2.5 Ma、260.7±3.1 Ma、301.7±2.4 Ma、249.7±3.5 Ma和431.9±2.7 Ma。斑岩样品的年龄为423.7±3.2 Ma。麦祖鲁地区4个花岗岩样品的年龄分别为291.6±4.3 Ma、443.8±4.1 Ma、279.7±2.4 Ma和259.0±3.0 Ma。根据日本海三叠纪沉积层序与志留泥盆纪和二叠纪-三叠纪花岗岩共存的情况，似乎在麦祖鲁带的北部与汉卡地块的最南端有很强的联系。我们的数据提供了额外的证据，支持在日本海中新世开放之前，日本西南部和符拉迪沃斯托克地区之间存在地质联系。
The Maizuru Belt in southwest Japan and the Khanka Massif in Far East Russia include both Siluro–Devonian and Permo–Triassic granitoids. In order to elucidate the simultaneity of granitoid magmatism in the Maizuru Belt and the Khanka Massif, we investigated zircon U–Pb ages using LA–ICP–MS for granitoid samples from the Maizuru area in the northern zone of the Maizuru Belt and from the Vladivostok area in the southernmost part of the Khanka Massif. Five granitoid samples from the Vladivostok area yielded ages of 422.2 ± 2.5 Ma, 260.7 ± 3.1 Ma, 301.7 ± 2.4 Ma, 249.7 ± 3.5 Ma, and 431.9 ± 2.7 Ma. Additionally, a porphyry sample yielded an age of 423.7 ± 3.2 Ma. Four granitoid samples from the Maizuru area yielded ages of 291.6 ± 4.3 Ma, 443.8 ± 4.1 Ma, 279.7 ± 2.4 Ma, and 259.0 ± 3.0 Ma. In reference to the coexistence of the Triassic sedimentary sequence and Siluro–Devonian and Permo–Triassic granitoids across the Sea of Japan, it seems that there were strong relationships between the northern zone of the Maizuru Belt and the southernmost part of the Khanka Massif. Our data provide additional evidence to support a geological connection between southwest Japan and the Vladivostok area before the Miocene opening of the Sea of Japan.