岡山大学 地球科学研究報告
Published by Okayama University Earth Science Reports Editorial Committee

新潟県東蒲原郡三川村三川鉱山産の自然金

山川 純次 Department of Earth Science, Faculty of Science, Okayama University
田邊 満雄 Okayama Mineral and Fossi club
島田 和昌 Okayama Mineral and Fossi club
逸見 千代子 Department of Earth Science, Faculty of Science, Okayama University
抄録
Native gold was found at Mikawa mine, Niigata Prefecture, Japan. The mineral was associated with quartz in a druse within quartz-vein in propyrite. The crystals were formed in filiform, reticulated and dendritic shapes with about 1 mm length with 0.1 mm width and 0.05 mm thickness. Very malleable and ductile, opaque and yellow with metallic luster. Qualitative and semi-quantiative analyses were performed by the wavelength dispersive EPMA. Quantitatively, the crystals contained Au, Ag and Hg. Semi-quantitative analyses were executed with ZAF correction algorithm. The results showed that these specimens had a average chemical composition Au0.77 Ag0.11Hg0.12. This specimen was archived at our site with a collection number ESO-M01001.
キーワード
Native Gold
Mikawa Mine
electrum
ESO-M01001
ISSN
1340-7414
NCID
AN10506284