K-Ar dating of hydrothermal alteration of the Yorii welded tuffs in the northeastern Kanto Mountains.
Bibliographic Information
- Other Title
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- 関東山地北東縁部寄居溶結凝灰岩類の熱水変質Ｋ‐Ａｒ年代
- カントウ サンチ ホクトウエンブ ヨリイ ヨウケツ ギョウカイガンルイ ノ ネッスイ ヘンシツ K Ar ネンダイ
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Description
Yorii welded tuffs in the northeastern Kanto Mountains are penetratively crushed and strongly hydrothermally altered. They are younger constituents of the Atokura Nappe and their ages indicate the lower limit of the time when the Atokura Nappe thrusted up on the Sanbagawa belt.The whole rock K-Ar ages of the altered Yorii welded tuffs give 58.0±2.9 Ma which is consistent with zircon FT age (59.6 Ma). This suggests that the hydrothermal alteration followed the formation of welded tuffs at the last stage of cooling process. After this hydrothermal alteration, the Yorii welded tuffs thrusted up on the Sanbagawa belt.
Journal
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- The Journal of the Geological Society of Japan
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The Journal of the Geological Society of Japan 106 (8), 574-577, 2000
The Geological Society of Japan
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Details 詳細情報について
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- CRID
- 1390282681210846208
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- NII Article ID
- 110003013135
- 10008701019
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- NII Book ID
- AN00141768
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- COI
- 1:CAS:528:DC%2BD3cXmt1Smtr0%3D
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- ISSN
- 13499963
- 00167630
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- NDL BIB ID
- 5466004
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed
