This research used samples and/or data provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. This work was supported in part by a Grant-in-Aid from the Ministry of Education, Culture, and Sports, Japan (A-10304037).
The authors gratefully acknowledge Dr. A.L. Abdeldayem (Tanta University) for carefully reading the manuscript and Dr. T. Yamazaki and Dr. H. Oda (Advanced Industry of Science and Technology) for the help in AMS and the VSM measurements. Also, thanks go to Dr. K. Ikehara (Advanced Industry of Science and Technology) for measurements of the grain size distribution, Dr. T. Takeda (Kyushu University) for many comments on the magnetic properties, and Dr. T. Itabashi (OYO Co. Ltd.) for measurement of the grain density. Dr. T. Sato (Fukada Geological Institute), who kindly revised an early version of the manuscript, is greatly appreciated.