East Carpathian Mineral District -

Dadu, Oita, Tolovanu, Iacobeni, Argestrut, Terezia, Sarisor, Dealul Rusului and Brosteni

For additions or corrections to the data for this deposit please contact webmaster

Location - Romania

Age (of portore) - 488 Ma

Original size - 2.9 million tonnes of Mn

References

Munteanu, M., Marincea, S., Kasper, H.U., Zak, K., Alexe, V., Trandafir, V., Saptefrati, G., and Mihalache, A., 2004, Black-chert-hosted manganese deposits from the Bistritei Mountains, Eastern Carpathians (Romania): petrography, genesis and metamorphic evolution: Ore Geology Reviews, v. 24, p. 45-65.

major elements - trace elements - rare-earth elements - REE normalized - isotopes

Major Elements, oxide percent

 

 

 

%

%

%

%

%

%

%

%

%

%

%
MnO
Fe2O3t
SiO2
Al203
CaO
MgO
K2O
Na2O
TiO2
P205
LOI

Average

 
Mn > 10 %
27.4
16.0
27.7
1.86
3.87
3.13
0.27
0.22
0.14
0.70
19.1
Dealul Rusului
3
 low-grade ore 6.74 16.5 57.5 3.64 2.08 2.26 0.47 nd 0.3 0.18 9.95
40
 low-grade ore 9.7 22.8 52.5 2.22 1.7 6.37 0.43 nd 0.3 0.78 4.95
41
 low-grade ore 6.38 21.8 52.7 1.88 2.37 5.73 0.85 nd 0.3 1.28 7.7
44
 unaltered ore 34.9 20.9 9.35 0.73 3.19 1.87 0.02 nd 0.05 0.63 29.85
45
 low-grade ore 7.08 18.3 58.3 0.71 1.83 5.53 0.31 0.18 0.2 0.9 7.9
59
 unaltered ore 47.9 14.9 9.43 0.27 2.21 0.76 0.04 nd 0.02 0.95 24.69
61
 unaltered ore 35.9 9.9 20.9 0.76 2.35 3.35 0.01 nd 0.03 0.24 26.68
71
 unaltered ore 3.19 2.83 86.2 1.67 0.61 0.52 0.4 nd 0.3 0.03 4.61
90
 oxidized ore 46.5 9.66 16.6 1 1.06 3.38 0.08 0.67 0.07 0.22 20.93
97
 oxidized ore 50.9 18.2 13.2 0.63 2.07 2.49 0.01 nd 0.02 1.17 13.11
102
 Mn-chert 12.5 4.90 68.6 4.83 0.88 3.49 0.19 0.22 0.16 0.03 4.17
116
 low-grade ore 12.8 21.3 25.5 1.14 7.81 6.77 0.44 nd 0.16 0.01 22.4
121
 low-grade ore 4.98 20.6 50.7 1.04 3.83 2.25 0.56 nd 0.16 2.56 7.3
127
 unaltered ore 29.8 27.7 18.8 0.78 1.81 1.28 0.52 nd 0.15 0.72 18.3
130
 unaltered ore 47.2 8.91 12.3 0.8 2.02 1.65 0.5 nd 0.18 0.26 26.3
133
 low-grade ore 15.4 22.3 30.3 1.4 5.87 3.72 0.47 0.02 0.24 0.68 14
141
 low-grade ore 11.1 14.4 54.5 6.4 2.09 3.51 0.67 nd 0.36 0.6 5.6
142
 unaltered ore 17.8 32.7 18.1 1.03 4.97 1.76 0.59 0.01 0.18 3 20.6
145
 unaltered ore 10.3 13.3 42.3 6.11 8.2 3.77 0.78 nd 0.43 1.12 11.1
147
 low-grade ore 2.77 32.2 32.7 9.2 0.95 8.9 1.72 nd 0.66 0.26 8.8
Dadu
T614 unaltered ore 37.5 10.78 18.3 1.45 2.72 2.16 0.09 0.35 nd 0.04 27.8
Oita
O3 low-grade ore 15.1 20.7 30.5 0.3 4.25 5.15 0.01 nd 0.1 0.87 24.45
O4 low-grade ore 12.2 26.1 29.9 0.74 4.09 4.55 0.27 0.02 0.01 1.82 22.56
O10 unaltered ore 16.1 13.7 40.8 4.06 5.51 3.63 0.37 nd 0.22 0.75 15.75
O12 chert 0.11 1.2 86.7 1.37 4.42 0.39 0.38 nd 0.08 1.98 2.95
O16 unaltered ore 38.5 9.0 14.3 2.26 6.37 2.56 nd nd 0.1 0.06 27.05
O17 unaltered ore 36.6 11.1 32.0 0.72 2.32 2.37 nd nd 0.05 0.06 14.7
O23 low-grade ore 6.95 11.0 54.7 3.42 7.2 3.02 0.07 nd 0.14 0.64 13.89
O24 unaltered ore 20.9 19.7 37.3 3.15 3.81 6.16 0.08 nd 0.19 1.01 9.77
O36 unaltered ore 24.2 4.8 39.5 0.4 7.65 1.36 0.02 nd 0.04 0.46 21.53
Host rocks
D1832 carbonate schist 2.01 2.95 16.4 4.64 38.1 1.41 1.5 0.04 0.03 0.19 32.54
D1830 carbonate schist 0.67 1.87 17.3 4.03 39.7 1.54 1.46 0.04 0.02 0.14 33.29
D1610 carbonate schist 0.55 3.09 59.5 4.73 15.7 1.02 1.33 0.01 0.02 0.24 13.97
D1946A black quartzite 0.03 2.18 94.8 1.24 0.17 0.12 0.23 nd 0.02 nd 1.48
D1613 black quartzite 0.02 1.05 95.4 1.48 0.11 0.08 0.34 0.01 nd nd 1.6
D61 sericite schist 0.04 5.09 57.1 24.1 0.25 1.41 6.33 0.53 0.49 0.15 4.55
D66 sericite schist 0.09 7.54 55.1 24 0.15 1.69 4.7 0.71 1 0.08 4.9

 

Trace elements, ppm

 

 

  

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

 

  
Ba
Co
Cr
 Cs Cu

Li
Nb
Ni
Pb
Rb
Sc
Sr
Th
U
V
Y
Zn
avg ore  
344
37
10
1.7
60
5.2
1.9
83
10
5.8
3.2
130
1.6
0.8
37
19
78
O1 ore-Oita 45 98 6.7 0.08 19.9 2.78 1.4 129 7.94 1 1.61 70 0.93 0.39 21.9 6.4 43
O4 ore-Oita 920 9.8 6.9 5.18 19.5 2.97 1.1 19.4 2.16 13.5 1.34 210 0.5 0.64 46 35.9 180
O19 ore-Oita 816 22.1 7.8 3.21 8.5 0.55 3.2 27.1 1.38 9.4 1.23 65 0.82 0.31 42 8.7 48
O20 ore-Oita 117 23.1 13.7 0.45 3.6 4.97 3.2 172 0.69 1 4.82 12 2.55 0.58 85 25.5 148
61 ore-Dealul Rusului 37 17.7 3.9 0.16 1.7 1.26 0.5 24.3 40.04 0.9 0.67 41 0.67 0.94 16.9 5.5 40
102 ore-Dealul Rusului 659 47.2 14.9 1.38 2.1 26.28 5.3 118.8 0.92 7 11.91 186 5.67 0.36 40 27.2 74
121 ore-Dealul Rusului 132 36.1 12.9 2.63 217.1 1.72 0.3 63.9 12.82 13.4 3.23 244 0.85 2.2 30 33.4 43
133 ore-Dealul Rusului 26 38.3 14.4 0.2 208.6 0.76 0.2 109.2 14.99 0.5 1.06 214 1.03 0.94 11.5 9.8 51
O12 chert-Oita 270 6 14.1 0.59 34.3 6.13 1.5 31 34.6 11.7 7.14 259 1.52 3.59 72 17.4 60
O29 chert-Oita 214 6 13 0.66 44.5 4.71 2.9 41 4.71 15.1 6.27 8 1.94 6.71 123 14.4 112
1613 chert-Dealul Rusului 189 0.3 26.7 1.21 10.1 5.02 2.5 2.1 27.09 25.1 6.64 6 2.26 1.18 155 8.2 27
1946A chert-Dealul Rusului 1577 0.7 38.8 0.69 30.9 18.38 2.6 5.9 17.88 23.5 2.94 10 1.59 0.98 161 6.6 36

blank or nr = not reported; bd = below detection

Rare-earth elements, ppm

 
Sample
La
Ce
Pr
Nd
Sm
Eu
Gd
Tb
Dy 
Ho 
Er 
Tm 
Yb
Lu
avg ore
28.68
88.65
5.46
21.33
3.93
0.95
3.86
0.57
2.97
0.58
1.60
0.22
1.38
0.20
O1 5.8 17.6 1.1 4.35 0.86 0.26 0.95 0.17 0.93 0.19 0.57 0.08 0.54 0.08
O4 52.7 162 10.16 39.17 6.99 1.74 7.33 1.07 5.72 1.06 2.7 0.32 1.77 0.22
O19 16.7 51 2.76 10.44 1.69 0.33 1.46 0.21 1.11 0.25 0.83 0.14 1.07 0.17
O20 13.8 40.6 2.55 10.24 2.47 0.76 3.36 0.59 3.55 0.78 2.45 0.37 2.59 0.39
61 10.2 39 2.06 8.21 1.53 0.31 1.31 0.18 0.9 0.18 0.51 0.07 0.46 0.06
102 28.4 78 6.32 25.35 5.02 1.1 5 0.81 4.42 0.87 2.39 0.33 2.2 0.32
121 58.9 167 11.01 42.13 7.35 1.8 7.45 1.05 5.42 1.03 2.62 0.31 1.74 0.22
133 42.9 154 7.74 30.71 5.51 1.29 4.04 0.47 1.74 0.29 0.76 0.1 0.65 0.1
Cherts
O12 9.5 15 2.17 8.73 1.83 0.46 2.07 0.34 2.08 0.45 1.27 0.17 1.1 0.17
O29 8.3 20.9 2.25 9.08 1.92 0.38 1.96 0.34 2.01 0.42 1.22 0.17 1.2 0.18
1613 18.2 37.2 3.62 13.94 2.13 0.35 1.3 0.19 0.98 0.21 0.67 0.1 0.76 0.12
1946A 25 48.9 4.73 16.82 2.14 0.33 1.22 0.18 0.96 0.2 0.63 0.09 0.66 0.1

Rare-earth elements,

normalized to chondritic values of Taylor & McLennan (1992)
Sample
LaN
CeN
PrN
NdN
SmN
EuN
GdN
TbN
YbN
Ce/Ce*
Eu/Eu*
LaN/YbN
  
avg
78.13
92.63
39.87
29.99
17.00
10.91
12.62
9.81
5.55
1.66
0.74
14.07
1.8045

0.7649

  
O1 15.804 18.391 8.029 6.118 3.723 2.989 3.105 2.931 2.177 1.63 0.88 7.26
O4 143.597 169.279 74.161 55.091 30.260 20.000 23.954 18.448 7.137 1.64 0.74 20.12
O19 45.504 53.292 20.146 14.684 7.316 3.793 4.771 3.621 4.315 1.76 0.64 10.55
O20 37.602 42.424 18.613 14.402 10.693 8.736 10.980 10.172 10.444 1.60 0.81 3.60
61 27.793 40.752 15.036 11.547 6.623 3.563 4.281 3.103 1.855 1.99 0.67 14.98
102 77.384 81.505 46.131 35.654 21.732 12.644 16.340 13.966 8.871 1.36 0.67 8.72
121 160.490 174.504 80.365 59.255 31.818 20.690 24.346 18.103 7.016 1.54 0.74 22.87
133 116.894 160.920 56.496 43.193 23.853 14.828 13.203 8.103 2.621 1.98 0.84 44.60
O12 25.886 15.674 15.839 12.278 7.922 5.287 6.765 5.862 4.435 0.77 0.72 5.84
O29 22.616 21.839 16.423 12.771 8.312 4.368 6.405 5.862 4.839 1.13 0.60 4.67
1613 49.591 38.871 26.423 19.606 9.221 4.023 4.248 3.276 3.065 1.07 0.64 16.18
1946A 68.120 51.097 34.526 23.657 9.264 3.793 3.987 3.103 2.661 1.05 0.62 25.60

Isotopes

            
Sample
 texture %S ore δ34S ore, sulfide %S host δ34S host, sulfide δ13C pdb δ13C pdb δ18O pdb δ18O smow Stotal % Ccarb %
            carb-C
org-C
        
average ore        
-10.65
-10.62

19.91

   
61 Banded ore         -12.21 -9.02 21.6    
102 Banded ore         -10.51 -9.73 20.8    
121 Banded ore         -14.29 -11.09 19.4    
133 Banded ore         -6.51 -14.90 15.5    
DR1 Banded ore         -4.78 -4.69 26.0    
DR3 Compact ore         -15.69 -10.50 20.0    
O3 Compact ore         -14.34 -9.63 20.9    
O6 Compact ore         -14.25 -9.83 20.7    
O22 Compact ore         -3.53 -14.72 15.7    
D415j Compact ore         -10.34 -12.13 18.4    
D1609 Black chert         -22.70    
D1832 Black chert         -27.80    
D1946 Carbonate schist         -1.68 -14.90 15.5    
Tb614 Carbonate schist         0.90 -11.44 19.1