日本西南部四国增生复合体中的锰矿分布(英文)

作     者：Masaharu NAKAGAWA 

作者机构：Department of Natural ScienceFaculty of ScienceKochi UniversityKochi 780-8520Japan 

出 版 物：《地球学报》 (Acta Geoscientica Sinica)

年 卷 期：2012年第33卷第S1期

页      面：50-54页

核心收录：

学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：Manganese deposit Accretionary complex Shikoku Metamorphism Deep-sea manganese nodule/crust 

摘      要：Bedded manganese ore deposits occur in many localities within the accretionary belts of the Shikoku region,SW *** deposits occur mostly in bedded chert or its metamorphosed *** chert-hosted manganese deposits are considered to have been manganese nodule/crust-bearing siliceous sediments on deep-sea floor and have been converted to manganese ores by low-grade metamorphism through subduction-accretion *** mineral assemblages of the ores reflect the metamorphic grade of the accretionary *** the other hand,iron-manganese deposits and some manganese deposits occurring directly over basalt are considered to have been the hydrothermal precipitates associated with submarine volcanism.