家族で時事放談663日目【菱刈鉱山に次ぐ有望鉱床となるか？】東京　青ヶ島海底700ｍ付近の海底熱水鉱床から金発見！【1トン当たり17ｇの世界最高水準】

[Will it become a promising deposit next to Hishikari Mine? ]Gold was discovered in a hydrothermal deposit near the sea floor of Aogashima, Tokyo, 700m![The world's highest level of 17g per ton]Kobe University https://www.kobe-u.ac.jp/NEWS/info/2022_06_02_02.html

http://www.nicovideo.jp/watch/sm40868279