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Minami–Ensei hydrothermal field, Okinawa Trough, Senkaku Islands (Diaoyudao Islands; Diaoyutai Islands), Ishigaki City, Okinawa Prefecture, Japani
| Regional Level Types | |
|---|---|
| Minami–Ensei hydrothermal field | Hydrothermal Vent |
| Okinawa Trough | - not defined - |
| Senkaku Islands (Diaoyudao Islands; Diaoyutai Islands) | Group of Islands |
| Ishigaki City | City |
| Okinawa Prefecture | Prefecture |
| Japan | Country |
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Latitude & Longitude (WGS84):
28° 23' 30'' North , 127° 38' 25'' East
Latitude & Longitude (decimal):
Type:
Was discovered in 1991.
The ME Knoll has a pumiceous body and crops out with a relative height of 600 m from the flat trough-filling seafloor sediment at a depth of 1200 m. There are four small basins at the top of the ME Knoll, but the hydrothermal vents are restricted to the southernmost “C basin”. In this basin, eight hydrothermal vents were discovered by Shinkai 2000 submersible in the early 1990s, which are generally aligned in an N-S orientation. The maximum fluid temperature detected in this field was 278 °C, corresponding to the boiling temperature at the seafloor depth.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
4 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Baryte | BaSO4 |
| S | Sulfur | |
| S | ⓘ Baryte | BaSO4 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Regions, Features and Areas containing this locality
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References
[1]Zhang, Xia; Sun, Zhilei; Wu, Nengyou (2023) Fe-Pb-Sr isotopic systematics of the hydrothermal chimney from the Minami-Ensei hydrothermal field, middle Okinawa Trough: Constraint on hydrothermal mineralization process in incipient back-arc basin. Ore Geology Reviews, 154. doi:10.1016/j.oregeorev.2023.105332
