|
|
| Black Stone: The trap rock of Pachami-Hatgacha and adjacent areas of Birbhum district.
|
| Type of Test |
Value |
| Los Angeles Abration value (%) |
11.00 – 15.00 |
| Aggregate Impact value (Dry %) |
4.00 – 7.00 |
| Aggregate Crushing Strength value (%) |
13.00 – 18.00 |
| Sodium Sulphate Soundness value (%) |
0.11 – 0.27 |
| Specific gravity |
2.94 – 3.01 |
|
| Quartz:
|
| Test Parameters |
Unit |
Results |
| Silica (SiO2) |
% |
99.37 |
| Alumina (Al2O3) |
% |
0.06 |
| Oxide of Iron (Fe2O3) |
% |
0.21 |
| Titanium Oxide (TiO2) |
% |
Nil |
| Lime (CaO) |
% |
0.05 |
| Magnesia (MgO) |
% |
Nil |
| Potash (K2O) |
% |
0.06 |
| Soda (Na2O) |
% |
0.10 |
| Loss on Ignition |
% |
0.05 |
| Undetermined |
% |
0.10 |
|
TOTAL |
100.00 |
|
| Analysis on sample dried at 100°C ∓ 50°C
|
| Fire Clay:
|
| Test Parameters |
Unit |
Results |
| Silica (SiO2) |
% |
43.75 |
| Alumina (Al2O3) |
% |
38.54 |
| Oxide of Iron (Fe2O3) |
% |
1.21 |
| Titanium Oxide (TiO2) |
% |
0.45 |
| Lime (CaO) |
% |
1.15 |
| Magnesia (MgO) |
% |
0.20 |
| Potash (K2O) |
% |
0.25 |
| Soda (Na2O) |
% |
0.41 |
| Loss on Ignition |
% |
13.79 |
| Undetermined |
% |
0.25 |
|
TOTAL |
100.00 |
|
| P.C.E. value : +31 to +33
|
| Granite:
|
| Good quality of Granite deposits for mining as decorative stone has been identified identified in Purulia and Bankura district of West Bengal. The most attractive variety or texture is Pink Porphiry and Tiger Skin.
|
| Others :
|
| Mokdumnagar China Clay:
|
| Test Parameters |
Unit |
Results |
| Silica (SiO2) |
% |
47.82 |
| Alumina (Al2O3) |
% |
33.43 |
| Oxide of Iron (Fe2O3) |
% |
2.18 |
| Titanium Oxide (TiO2) |
% |
2.264 |
| Lime (CaO) |
% |
0.92 |
| Magnesia (MgO) |
% |
Nil |
| Potash (K2O) |
% |
0.16 |
| Soda (Na2O) |
% |
0.19 |
| Loss on Ignition |
% |
12.66 |
| Undetermined |
% |
-- |
|
| Feldspar:
|
| Test Parameters |
Unit |
Results |
| Silica (SiO2) |
% |
63.40 |
| Alumina (Al2O3) |
% |
19.30 |
| Oxide of Iron (Fe2O3) |
% |
0.36 |
| Titanium Oxide (TiO2) |
% |
Traces |
| Lime (CaO) |
% |
0.48 |
| Magnesia (MgO) |
% |
0.26 |
| Potash (K2O) |
% |
13.52 |
| Soda (Na2O) |
% |
2.10 |
| Loss on Ignition |
% |
0.33 |
| Undetermined |
% |
0.25 |
|
TOTAL |
100.00 |
|
| Iron Ore (Laterite):
|
| Test Parameters |
Unit |
Results |
| Silica (SiO2) |
% |
10.85 – 50.53 |
| Alumina (Al2O3) |
% |
4.45 – 13.69 |
| Total Iron as (Fe2O3) by mass |
% |
27.74 – 73.31 |
| Titanium Oxide (TiO2) |
% |
0.60 – 0.76 |
| Loss on Ignition (LOI) |
% |
8.82 – 12.28 |
|
| Rock Phosphate (Apatite):
|
| Test Parameters |
Unit |
Results |
| Silica (SiO2) |
% |
6.21 – 18.28 |
| Alumina (Al2O3) |
% |
0.78 – 3.84 |
| Oxide of Iron (Fe2O3) |
% |
12.30 – 22.36 |
| Phosphorous (P2O5) |
% |
15.27 – 30.13 |
| Fluoride (F) |
% |
1.55 – 3.62 |
| Lime (CaO) |
% |
26.17 – 42.64 |
| Magnesia (MgO) |
% |
0.10 – 0.13 |
| Potash (K2O) |
% |
0.07 – 0.09 |
| Soda (Na2O) |
% |
0.45 – 0.88 |
| Loss on Ignition |
% |
2.92 – 9.05 |
| (SO3) |
% |
1.23 – 1.87 |
|
|
|
|