Ezuri
Akita Prefecture, Hokuroku district, Japan
Volcanogenic massive sulfidesZn-Pb-Cu (Ba)
- Type
- Kuroko-type volcanogenic massive sulfide
Kuroko-type massive sulfide deposit of the Hokuroku district, the type locality (Miocene). The ferruginous cherts (tetsusekiei) overlying the ores have widely scattered δ56Fe (-1.75 to +2.00 ‰ across the district), reflecting partial oxidation of hydrothermal iron in anoxic or suboxic pools; post-Kuroko ferruginous sediments range from -1.75 to +0.69 ‰, the youngest from -0.52 to +0.11 ‰. Ferruginous cherts with the highest δ56Fe of the district (up to +2.00 ‰). Indicative coordinates.
δ56Fe in ‰ (per mil) Values of the same system
Standard : IRMM-014
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.33 ± 1.05 ‰ | −0.49 / 2 ‰ | 7 | ferruginous chert and sediments (tetsusekiei) overlying the ore Mean and standard deviation recalculated from 7 samples, Supplementary Table 4. Bulk rock (microcrystalline hematite and quartz); variable Ce/Ce*. | Otake et al. (2021), Large Fe isotope fractionations in sulfide ores and ferruginous sedi… |
Deposits of the same type
- Doyashiki (Kannondo) Japan
- Matsumine Japan
- Fukazawa Japan
- Kosaka Japan
- Iheya North Mer de Chine orientale
- Iheya Ridge Mer de Chine orientale
- Tangyin Mer de Chine orientale
- Yonaguni IV Mer de Chine orientale
Cite this page
IsoFind Atlas (2026). Ezuri, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/ezuri/ (accessed 2026-10-13).
@misc{isofind2026ezuriisotopesignatures,
title = {Ezuri, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/ezuri/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13