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A newly discovered high‐pressure terrane in eastern Hokkaido, Japan
Author(s) -
SAKAKIBARA MASAYUKI
Publication year - 1986
Publication title -
journal of metamorphic geology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.639
H-Index - 114
eISSN - 1525-1314
pISSN - 0263-4929
DOI - 10.1111/j.1525-1314.1986.tb00360.x
Subject(s) - glaucophane , geology , metamorphism , lawsonite , amphibole , epidote , terrane , geochemistry , pyroxene , actinolite , subduction , aragonite , paleontology , petrology , eclogite , tectonics , chlorite , olivine , quartz , calcite
The upper Jurassic Nikoro greenstone complex of eastern Hokkaido suffered high‐pressure intermediate type metamorphism. Characteristic minerals include lawsonite, aragonite, sodic pyroxene of the aegirinejadeite series, winchite. sodic amphibole of the glaucophane‐riebeckite series, pumpellyite, epidote and actinolite. High‐pressure metamorphism of the Nikoro greenstone complex is related to subduction of the Kula plate toward the Palaeo‐Okhotsk Land during Cretaceous time.