鉱床ならびにその上下盤の岩石中の微量成分
1966 年 82 巻 944 号 p. 1051-1064
詳細
1966 年 82 巻 944 号 p. 1051-1064
Distribution of the minor elements, silver, lead, zinc, arsenic, barium, manganese, molybdenum, strontium, nickel and cobalt in some ore-bodies and their country rocks of “Kurokô” deposits in the northern part of Akita Prefecture, is indicated by the spectroscopic analysis (Spectrograph-Quartz, G-170, Shimazu) of the samples more than 2000 from boring-cores.
Behavior of some minor elements indicating remarkable differences between the tuffs of Nishikurosawaformation and Onnagawa-formation, plays a part in correlation of these formations.
Characteristic distribution of vanadium and manganese in the Matsumine-tuff, is useful for the key-bed in correlation.
Silver, lead, zinc and others seem to be effective for the prospecting of Kuroko deposits and distribution of silver in the Matsumine-tuff is the best index.
Vanadium which is not found in a part of the tuff of Nishikurosawa-formation seems to be effective for correlation of the bed in the formation.
One of characteristic minor elements in the acidic volcanic rocks in Nishikurosawa horizon is vanadium, and some minor elements in the basic volcanic rocks are nickel, cobalt chromium, vanadium and manganese.
