Harlech Dome
Location - Wales, United Kingdom
Age (of portore) - 520 Ma
Original size - 0.08 million tonnes of Mn
Reference
Mohr, P.A., 1956, A geochemical study of the Lower Cambrian manganese ore of the Harlech Dome, North Wales, in Gonzalez-Reyna, J., ed., Symposium Sobre Yacimientos de Manganeso: Mexico City, XX Congreso Geological International, v. 5, p. 273-290.
major elements
Major Elements, oxide percent
|
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
% |
ppm |
|
MnO |
Fe2O3t |
SiO2 |
Al203 |
CaO |
MgO |
K2O |
Na2O |
TiO2 |
P205 |
LOI |
Ba | ||
Average
|
28.22 | 5.60 | 21.53 | 10.08 | 8.99 | 3.34 | 1.16 | 0.60 | 0.43 | 0.14 | 20.71 | ||
| 1 | Rhinog Fach | 36.84 |
4.42 |
27.17 |
8.37 |
5.54 |
1.4 |
- |
- |
- |
16.87 |
||
| 2 | St. Tudwal's | 34.46 | 10.32 | 15.33 | 11.56 | 2.29 | 3.37 | 0.46 | 1.18 | 0.67 | 20.75 | 627 |
|
| 3 | Afon Gamlan | 16.63 | 4.23 | 24.62 | 12.35 | 19.97 | 3.04 | 0.02 | nil |
0.44 | 0.2 | 18.47 | |
| 4 | Egryn mines | 28.05 | 5.13 | 23.07 | 10.45 | 5.09 | 5.28 | 2.45 | 0.06 | 0.2 | 0.18 | 20.14 | |
| 5 | Harlech | 25.12 | 3.90 | 17.44 | 7.65 | 12.04 | 3.63 | 1.7 | 0.57 | 0.39 | 0.04 | 27.34 | 1701 |
blank or nr = not reported; bd = below detection