Abstract
The writer studied the Mitsuishi "Roseki" deposit, which is located at 50km east of Okayama City and is one of the largest of such deposits in Japan., The principal purpose of the present paper are as follows; 1., Determination of the component minerals of the Roseki, by various mineralogical methods., 2., Consideration on the applicability of these methods, judged from the results obtained., 3., Explanation of the outline of the ore bodies from the geological point of view., 4., Contribution to the knowledge of the genesis of the deposit.,
