Dae Hwa
North Chungcheong Province (about 100 km south-east of Seoul), Corée du Sud
Other hydrothermalW-Mo
- Type
- Wolframite-scheelite-molybdenite quartz veins
Over 20 quartz veins (3 to 60 cm) in Precambrian granitic gneiss, near a Cretaceous granitic stock; vein muscovite dated at 88 ± 2 Ma (K-Ar); average grades of 0.51 % WO3 and 1.95 % MoS2. Famous colour-zoned scheelites. Three stages (molybdenite-wolframite 400-315 °C, iron sulfide-scheelite 315-230 °C, carbonate 230-150 °C), with an increasing meteoric water input; igneous sulfur (H2S δ34S about 3 ‰). Estimated coordinates. Indicative coordinates.
δ18O in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 10.99 ± 0.32 ‰ | 10.63 / 11.41 ‰ | 5 | vein quartz Mean and standard deviation recalculated from 5 samples, Table 1. Per-sample means (2 to 4 analyses each). Calculated fluid from 5.0 to 6.3 ‰ (360 to 390 °C). | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| 8.2 ± 0.06 ‰ | 8.16 / 8.24 ‰ | 2 | vein muscovite Mean and standard deviation recalculated from 2 samples, Table 1. Quartz-muscovite temperature of 390 °C. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| 4.15 ± 0.19 ‰ | 4.02 / 4.29 ‰ | 2 | wolframite Mean and standard deviation recalculated from 2 samples, Table 1. Calculated fluid at 5.5 and 5.8 ‰ (Landis and Rye, 1974). | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| 2.89 ‰ | 1 | cassiterite One analysis, Table 1. Mean of two analyses. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… | |
| 1.59 ± 0.76 ‰ | −0.81 / 2.21 ‰ | 14 | early scheelite (cores of zoned crystals) Mean and standard deviation recalculated from 14 zones, Table 1. Grouped after the abstract ranges (cores -0.8 to +2.2 ‰, edges -7.3 to -2.7 ‰), each value being the mean of one or more growth zones of six crystals. Calculated fluid from 0.1 to 3.9 ‰. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| −4.67 ± 1.75 ‰ | −7.28 / −2.68 ‰ | 7 | late scheelite (edges of zoned crystals) Mean and standard deviation recalculated from 7 zones, Table 1. Grouped after the abstract ranges (cores -0.8 to +2.2 ‰, edges -7.3 to -2.7 ‰), each value being the mean of one or more growth zones of six crystals. Calculated fluid from -6.7 to -1.9 ‰: increasing meteoric water. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| 7 ± 1.4 ‰ | 5.7 / 9.3 ‰ | 5 | late calcite Mean and standard deviation recalculated from 5 samples, Table 2. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| 8.8 ± 1.1 ‰ | 7.7 / 10 ‰ | 4 | late dolomite Mean and standard deviation recalculated from 4 samples, Table 2. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| 11.8 ‰ | 1 | late siderite One analysis, Table 2. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
δ13C in ‰ (per mil) Values of the same system
Standard : V-PDB
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −4.6 ± 1.5 ‰ | −7.6 / −1.6 ‰ | 10 | late carbonates (calcite, dolomite, siderite) Mean and standard deviation recalculated from 10 samples, Table 2. Calcite -5.2 to -3.7 ‰, dolomite -5.0 to -1.6 ‰, siderite -7.6 ‰. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
δD in ‰ (per mil) Values of the same system
Standard : V-SMOW
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −72 ± 7 ‰ | −78 / −65 ‰ | 3 | fluid inclusion water in quartz and wolframite Mean and standard deviation recalculated from 3 samples, Table 3. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| −65 ± 5 ‰ | −74 / −60 ‰ | 6 | fluid inclusion water in scheelite Mean and standard deviation recalculated from 6 samples, Table 3. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| −82 ± 16 ‰ | −101 / −71 ‰ | 3 | fluid inclusion water in late carbonates Mean and standard deviation recalculated from 3 samples, Table 3. The lightest (-101 ‰, calcite) approaches unexchanged meteoric water (about -140 ‰). | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
| −78 ‰ | 1 | vein muscovite One analysis, Table 3. Calculated water at -48 ‰ (390 °C). | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 3.4 ± 0.3 ‰ | 3 / 3.9 ‰ | 8 | vein sulfides (molybdenite, pyrite, pyrrhotite, chalcopyrite, sphalerite) Mean and standard deviation recalculated from 8 samples, Table 4. Analyses from this study only; the table also lists 15 analyses by So et al. (1983b), from 2.4 to 4.4 ‰. Igneous sulfur. | Shelton et al. (1987), Stable isotope studies of the Dae Hwa tungsten-molybdenum mine, Re… |
Deposits of the same type
- Qingchengzi orefield (Zhenzigou, Xiquegou, Gaojiabaozi) China
- Beiwagou China
- Suii Japan
- Ikuno Japan
- Linglong (Jiaodong gold district) China
- Canzhuang (Jiaodong gold district) China
- Kaneuchi Japan
- Ohtani (Ōtani) Japan
Cite this page
IsoFind Atlas (2026). Dae Hwa, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/dae-hwa/ (accessed 2026-10-13).
@misc{isofind2026daehwaisotopesignatures,
title = {Dae Hwa, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/dae-hwa/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13