Drilling Results and Exploration Update
Geology of Sumitomo Metal's Hishikari Mine
At Hishikari, veins preferentially occur
near a major unconformity between
Cretaceous sedimentary rocks and
overlying Tertiary volcanic rocks (right).
Extensive clay alteration is present at
surface.
Veins locally bear abundant ginguro,
banded silver sulfosalts, and electrum
(below).
HISHIKARI - Cross Section
NW
SE
II
IV
岸
IV
Au-Ag Ore
Yamada Deposit, Hishikari Mine
Au: 948g/t, Ag: 3,720g/t
Sumitomo Metal Mining Co., Ltd.
2023 | Irving Resources
Shishimano
Dacite
0.66-1.1 Ma
Hishikari
Andesites
0.95 -1.78 Ma
Daisen
Ryosen
Zuisen Hosen
Sanjin
I
Alunite-cristobalite/tridymite
0.78 - 1.05 Ma
200 m
II
Cristobalite-smectite-kaolinite
Vein
III Quartz-smectite
Shimanto Group
Cretaceous Basement
IV
Interlayered illite-smectite
200 m
chlorite-smectite
V
Chlorite-sericite/illite
Modified from Ibaraki and Suzuki (1993), and Izawa et al. (1990).
1200
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