The Re-Os of Molybdenite from the Hhirase Ore Deposit, Japan, and its Comparison with Rb-Sr and K-Ar Ages for Host Rocks.
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概要
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The Re-Os age for molybdenite from the Hirase ore deposit, Japan, was determined. The obtained Re-Os age of 65.4Ma for molybdenite is in good agreement with the Rb-Sr whole rock age of 65.6Ma for the host Shirakawa granitic mass, but it is older than the K-Ar mineral age of 61.7Ma for the related wall rock. The difference between the K-Ar age and that determined by the Re/Os or Rb/Sr system can be explained to indicate the difference in the closure temperature among these chronological systems in the cooling history of ore deposit and host granitic masses.
- 日本学士院の論文
著者
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SUZUKI KATSUHIKO
Department of Hygiene, Hirosaki University School of Medicine
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Masuda Akimasa
Department Of Chemistry Faculty Of Science The University Of Tokyo
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