U-Pb dating of detrital zircons from the Sangun metamorphic rocks, Kyushu, Southwest Japan: An evidence for 1.9-2.0 Ga granite emplacement in the provenance.
-
- Miyamoto Tomoharu
- Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University
-
- Yanagi Takeru
- Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University
書誌事項
- タイトル別名
-
- U-Pb dating of detrital zircons from th
この論文をさがす
抄録
U-Pb and Rb-Sr radiometric dating has been done on zircon samples and mineral concentrates, respectively, separated from psammitic schists of the Sangun metamorphic rocks in central Kyushu, Japan. Based on their shapes and colors, zircon grains were grouped into six. Rounded and short prismatic zircons define, independently of their colors, a common discordia with an upper intercept at 1.91 ± 0.04 Ga. Elongated zircons define another discordia with an upper intercept at 0.93 ± 0.06 Ga. A Rb-Sr internal isochron defined by the mineral concentrates gives an age of 197.7 ± 6.5 Ma, which represents the time of the Sangun metamorphism in central Kyushu. The U-Pb age of 1.91 Ga coincides with that of zircons from the Oki metamorphic rocks (1.96 ± 0.04 Ga: Yamashita and Yanagi, 1994). This and the great abundance of 1.91 Ga grains in the zircon populations seem to indicate a prominent plutonic activity at 1.9–2.0 Ga in the provenance common for the Sangun and Oki metamorphic rocks. The U-Pb ages of zircon from the Sangun metamorphic rocks indicate the episodic growth at 1.91 and 0.93 Ga of the East Asian continent close to the Japanese Islands.
収録刊行物
-
- GEOCHEMICAL JOURNAL
-
GEOCHEMICAL JOURNAL 30 (5), 261-271, 1996
一般社団法人日本地球化学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001204550439680
-
- NII論文ID
- 130003904569
- 10008801052
-
- NII書誌ID
- AA00654975
-
- COI
- 1:CAS:528:DyaK28XnsVCrtb4%3D
-
- ISSN
- 18805973
- 00167002
- http://id.crossref.org/issn/00167002
-
- NDL書誌ID
- 4080072
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可