山口県,高山はんれい岩体のSr同位体組成

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書誌事項

タイトル別名
  • The isotopic composition of Strontium in the Koyama Gabbro mass, Yamaguchi Prefecture, Japan
  • ヤマグチケン , コウザン ハンレイガンタイ ノ Sr ドウイタイ ソセイ

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説明

The Koyama Gabbro mass intruding into the Miocene sedimentary strata has various kinds of rock facies such as anorthosite, anorthositic gabbro, gabbro, diorite, aplitic granite and aplite. The Sr;87/Sr86 ratios for each rock facies including apiitic granit and aplite are well constant, and the average ratio (0.706) is slightly higher than that for Japanese basaltic rocks. This result indicates that it is unlikely that the aplitic rock was formed through assimilation of an appreciable amount of sialic crustal material relatively rich in Sr87.

収録刊行物

  • 地球科学

    地球科学 25 (4), 177-180, 1971

    地学団体研究会

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