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January 1, 2026Journal of Mineralogical and Petrological SciencesOpen Access

Petrology of the Kuju Volcanic Group, northeast Kyushu Island, Japan

Soma Yamanaka Ryotaro Fujihara Tatsuki Orito Taichi Heijima Masako Yoshikawa Tomo Shibata Tomoyuki Shibata

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Key Points

The study aims to describe the petrographic characteristics and mineral compositions of volcanic rocks in the Kuju Volcanic Group.
Conducted detailed petrographic observations
Analyzed modal compositions of phenocrysts
Measured major and trace element data of whole rock samples
Classified volcanic rocks into three groups based on mineral assemblages
Identified groups containing different amounts of olivine, hornblende, and orthopyroxene
Subdivided the hornblende group based on plagioclase characteristics

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Implication

This research analyzes volcanic rock properties in the Kuju Volcanic Group, suggesting mineral composition diversity.

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Cite This Study

Yamanaka et al. (2026) studied this question.

synapsesocial.com/papers/69e4713b010ef96374d8dd8d https://doi.org/10.2465/jmps.250310

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