TY - JOUR
T1 - Manganese formations in the accretionary belts of Japan
T2 - Implications for subduction-accretion process in an active convergent margin
AU - Nakagawa, M.
AU - Santosh, M.
AU - Maruyama, S.
PY - 2011/8/10
Y1 - 2011/8/10
N2 - In the accretionary complexes of Japan, many bedded manganese and iron-manganese ore deposits occur, especially in the Jurassic complexes such as the Chichibu, Tamba, Mino, Ashio and Northern Kitakami belts. The manganese ores in these Jurassic accretionary complexes probably formed from manganese nodule/crust-bearing siliceous sediments on deep-sea floor and were subsequently converted to the manganese ores by metamorphism during the subduction-accretion process. Some of the deposits also show the signatures of younger granitic intrusions. The manganese formations now incorporated within these belts are marker beds of accretionary tectonics associated with plate tectonic processes in convergent margins.
AB - In the accretionary complexes of Japan, many bedded manganese and iron-manganese ore deposits occur, especially in the Jurassic complexes such as the Chichibu, Tamba, Mino, Ashio and Northern Kitakami belts. The manganese ores in these Jurassic accretionary complexes probably formed from manganese nodule/crust-bearing siliceous sediments on deep-sea floor and were subsequently converted to the manganese ores by metamorphism during the subduction-accretion process. Some of the deposits also show the signatures of younger granitic intrusions. The manganese formations now incorporated within these belts are marker beds of accretionary tectonics associated with plate tectonic processes in convergent margins.
KW - Accretionary complex
KW - Deep-sea Mn-Fe nodules
KW - Japan
KW - Manganese deposit
KW - Metamorphism
KW - Tectonics
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U2 - 10.1016/j.jseaes.2011.04.005
DO - 10.1016/j.jseaes.2011.04.005
M3 - Article
AN - SCOPUS:79960967537
VL - 42
SP - 208
EP - 222
JO - Journal of Asian Earth Sciences
JF - Journal of Asian Earth Sciences
SN - 1367-9120
IS - 3
ER -