Mataura River, Southland District, Southland Region, New Zealandi
| Regional Level Types | |
|---|---|
| Mataura River | River |
| Southland District | District |
| Southland Region | Region |
| New Zealand | Country |
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Key
Latitude & Longitude (WGS84):
46° 14' 45'' South , 168° 50' 25'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Planktic foraminifera calcite replaced by siderite.
The sequence at the location is basal Jurassic greywacke, then overlain by sandstone conglomerate, sandstone-siltstone, lignite lenses, carbonaceous siltstone and mudstone, clay siltstone, carbonaceous siltstone, chamosite-siderite lenses, carbonaceous sandstone and siltstone, and river gravels at the surface.
There are two 20 cm thick chamosite-siderite lenses, of a short extent, in sandstone. The lenses are crammed with light brown spherules of siderite replacing calcite of the Eocene species Globigerapsis Index as fossilised calcite replaced by siderite. The spherules are up to 60% volume of the lenses, with most of the remaining the clay chamosite.
The lenses are exposed on the east bank of the Mataura River. Co-ordinates given in the source is NZMS 260 F46/891323. This is a mapping reference no longer used in New Zealand, and we have been unable to confirm the location other than map F46 which places it on the Mataura River, within 15 kilometres south of the Mataura town site.
Select Mineral List Type
Standard Detailed Gallery Strunz Dana Chemical ElementsMineral List
2 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:
| ⓘ Chamosite Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 Reference: Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages.
|
| ⓘ Siderite Formula: FeCO3 Reference: Challis, G.A., Hornibrook, N. de B. (1989) Replacement of foraminifera by siderite in Gore Lignite Beds Southland. New Zealand Journal of Geology and Geophysics, 32:4, 527-529. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 5 - Nitrates and Carbonates | |||
|---|---|---|---|
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| Group 9 - Silicates | |||
| ⓘ | Chamosite | 9.EC.55 | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
List of minerals arranged by Dana 8th Edition classification
| Group 14 - ANHYDROUS NORMAL CARBONATES | |||
|---|---|---|---|
| A(XO3) | |||
| ⓘ | Siderite | 14.1.1.3 | FeCO3 |
| Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings | |||
| Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra | |||
| ⓘ | Chamosite | 71.4.1.7 | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| C | Carbon | |
| C | ⓘ Siderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| O | ⓘ Siderite | FeCO3 |
| Mg | Magnesium | |
| Mg | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Al | Aluminium | |
| Al | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Si | Silicon | |
| Si | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Fe | Iron | |
| Fe | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Fe | ⓘ Siderite | FeCO3 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Challis, G.A., Hornibrook, N. de B. (1989) Replacement of foraminifera by siderite in Gore Lignite Beds Southland. New Zealand Journal of Geology and Geophysics, 32(4), 527-529.
Railton, G.T., Watters, W.A. (1990) Minerals of New Zealand. New Zealand Geological Survey Bulletin 104, 89 pages.
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