Journal
GONDWANA RESEARCH
Volume 16, Issue 3-4, Pages 609-621Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.gr.2009.05.003
Keywords
Bedded manganese deposits; Shikoku; Accretionary complex; Metamorphism; Deep-sea Mn-Fe nodules
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Numerous bedded manganese and manganese-iron ore deposits occur in Shikoku, Southwest Japan. The mineralogy, wall rock characteristics and fossil age data of the deposits are synthesized in this paper. Their mineral assemblages correlate well with the progressive metamorphic grade of the accretionary complexes in Shikoku. Based on the plate tectonic framework of subduction-accretion process, the deposits are considered to have formed by metamorphism of Mn-Fe-nodule-bearing siliceous sediments on the ocean floor. (C) 2009 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
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