Lamprophyre from the Nakanogawa group in the central zone of Hokkaido, northern Japan

M. Owada, F. Nanayama, T. Shimura, Y. Osanai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Lamprophyre (camptonite) was found in the southern most part of the Nakanogawa group. This camptonite occurs as dyke in pelagic sediment surrounded by basic tuff matrix. The camptonite is composed of alkali feldspar, kaersutite, salite, biotite, opaque minerals, apatite and aegirine-augite. K-Ar dating of the camptonite indicates an age of 95 Ma. The camptonite was emplaced in the environment of oceanic islands or sea mount during Cenomanian. -from English summary

Original languageEnglish
Pages (from-to)62-67
Number of pages6
JournalJournal of Mineralogy, Petrology and Economic Geology
Volume87
Issue number2
DOIs
Publication statusPublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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