Molango

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Location - Mexico

Age (of protore) - 156 Ma

Original size - 46 million tonnes of Mn

References

Liu, T-B. , 1988, C-S-Fe Correlation of Shales Hosting Sedimentary Manganese Deposits. Unpublished PhD Dissertation, University of Cincinnati, Cincinnati, OH.

Liu, T-B. , 1990, C-S relationships in shales hosting manganese ores from Mexico, China, and Newfoundland; implications for depositional environaent and mineralization: Ore Geology Reviews, v. 5, p. 325-340.

Liu, T-B., Maynard, J.B., and Alten, J., 2006, Superheavy S isotopes from glacier-associated sediments of the Neoproterozoic of south China: Oceanic anoxia or sulfate limitation?, in Kesler, S.E., and Ohmoto, H., eds., Evolution of Early Earth's Atmosphere, Hydrosphere and Biosphere--Constraints from Ore Deposits: Boulder CO, Geological Society of America, Memoir 198, p. 205-222.

Okita, P. M. , 1987, Geochemistry and mineralogy of the Molango manganese orebody, Hidalgo State, Mexico. Unpublished PhD dissertation, University of Cincinnati, Cincinnati, OH.

Okita, P.M., 1992, Manganese carbonate mineralization in the Molango District, Mexico: Economic Geology, v. 87, p. 1345-1366.

Okita, P.M., and Shanks, W.C., 1992, Origin of stratiform sediment-hosted manganese carbonate ore deposits: Examples from Molango, Mexico and Taojiang, China: Chemical Geology, v. 99, p. 139-164.

Okita, P. M., Maynard, J. B., Spiker, E. C., and Force, E. R., 1988, Isotopic evidence for organic matter oxidation by manganese reduction in the formation of stratiform manganese carbonate ore: Geochimica et Cosmochimica Acta, v. 52, p. 2679-2685.

Doe, B. R., Ayuso, R. A., Futa, K., & Peterman, Z. E., 1996, Evaluation of the sedimentary manganese deposits of Mexico and Morocco for determining lead and strontium isotopes in ancient seawater. AGU Monograph 95. Earth Processes: Reading the Isotopic Code, 391-408.

 

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

Major Elements, oxide percent

 

 

 

%

%

%

%

%

%

%

%

%

%

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

Average

 
Mn carb ore
 36.4 8.5 11.4 2.7 5.2 8.5 0.2 0.0 0.1 0.1 29.1
T1+0.45 Mn ore 47.5 4.03 4.06 b.d. 0.01 30.2
T1+0.50 Mn ore 41.8 3.93 3.5 b.d. 0.02 30.5
T1+5.9 Mn ore 38.4 4.99 4.9 b.d. 0.03 28.8
T1+4.0 Mn ore 38.1 6.31 2.52 b.d. 0.02 27.6
T2+15 Mn ore 37.9 6.38 5.46 b.d. 0.03 29.6
T1+3.0 Mn ore 36.7 7.86 2.8 b.d. 0.02 27.9
T1+4.5  Mn ore 36.3 11.0 12.0 2.79 2.19 8.79 0.00 0.00 0.07 0.14 27.4
T2+10 Mn ore 36.3 8.72 3.5 b.d. 0.02 28.2
T1+2.5  Mn ore 35.9 13.5 10.8 2.59 2.64 8.23 0.01 0.01 0.09 0.13 26.6
T2+7 Mn ore 35.8 7.33 4.76 b.d. 0.02 28.3
T2+4 Mn ore 34.7 12 2.66 b.d. 0.02 28.0
T1+3.4 Mn ore 34.4 14.48 2.38 b.d. 0.01 26.3
AC+4 Mn ore 34.3 6 13.01 0.45 0.04 34.2
AC+1.8 Mn ore 34.1 5.62 11.75 b.d. 0.05 33.5
T2+1 Mn ore 34.0 12.01 2.66 b.d. 0.02 28.4
T1+2.5 Mn ore 31.0 14.44 na na 3.5 na b.d. 0.02 na na 26.0
AC0 Mn ore 30.9 5.43 15.39 b.d. 0.05 33.1
T2+18 low-grade Mn ore 21.3 14.1 13.99 b.d. 0.04 18.4
T2+50 low-grade Mn ore 20.0 9.18 15.39 0.47 0.2 23.7
OMB-MN low-grade Mn ore
17.8
4.7
1.05
1.05
0.07
23.6
AC+8 low-grade Mn ore
16.7
7.46
0.42
0.42
0.08
29.6
T1+15.7 low-grade Mn ore
11.9
5.99
27
0.26
24.7
AC-6 low-grade Mn ore
3.6
6.92
1.81
1.81
0.23
13.5
OMB-SH Mn bl  shale
3.4
6.02
2.65
2.65
0.2
11.8
AC-0.3  shale 2.6 4.64 33.3 6.84 17.2 6.70 1.32 0.18 0.29 0.10 27.5
T1+0.1 Black Shale
1.6
2.30
0.16
37.9
AC-2 Black Shale
1.0
6.49
2.29
2.29
0.39
14.6
AC-4 Black Shale
0.8
4.03
1.57
1.57
0.32
23.0
T1+76.1 Arg.Limest.
0.5
2.36
1.11
1.11
0.58
26.3
T2-7 Black Shale
0.4
12.8
1.81
1.81
0.82
11.6
T2-0 Arg.Limest.
0.3
10.1
2.29
2.29
0.81
11.6
T2-70 Black Shale
0.3
7.35
2.05
2.05
0.71
15.1
T2+12 shale
0.2
10.1
2.65
2.65
0.87
13.5
T1-0.1 Black Shale
0.2
14.3
1.10
1.10
0.66
13.0
T1-3.9 Arg.Limest.
0.1
6.51
1.93
1.93
0.74
15.2

 

Trace elements, ppm

 

 

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

ppm

 
As
Ba
Cd
Co
Cr
Cu
Mo
Nb
Ni
Pb
Rb
Sc
Sr
Th
U
V
Y
Zn
Zr
avg 23.8 47.6 na 138.2 15.1 7.0 1.5 1.5 55.2 6.0 10.8 2.0 99.1 1.3 1.1 66.5 8.6 35.9 14.6
T1+0.45 67.9 25 310 7.5 b.d. 140 b.d. b.d. 0.79 60 0.63 0.5 15 b.d.
T1+0.50 12.0 38 460 17 b.d. 240 b.d. b.d. 1.8 94 1.4 0.96 65 b.d.
T1+5.9 14.0 33 0.21 b.d. b.d. 16 b.d. b.d. 2.23 81 1.3 0.87 20 b.d.
T1+4.0 13.0 37 83 16 b.d. 42 b.d. b.d. 2.38 65 1.42 1.2 40 b.d.
T2+15 3.2 36 9 19 b.d. 21 b.d. b.d. 2.84 91 1.68 0.81 40 b.d.
T1+3.0 35.0 25 76 17 b.d. 35 b.d. b.d. 2.28 67 1.33 1.1 25 b.d.
T1+4.5  24.3 8 1 1 79 6 <0.2 38.6 1.4 1.8 77 9 41 16.3
T2+10 36.4 59 110 16 b.d. 34 b.d. b.d. 2.4 100 1.5 0.98 40 b.d.
T1+2.5  na 65.2 na na 6 2 2 40 6 b.d. na 41.2 1.4 1.46 56 8.2 54 12.9
T2+7 38.0 47 120 9.5 b.d. 23 b.d. b.d. 1.49 100 0.95 0.6 20 b.d.
T2+4 41.3 72 180 21 b.d. 41 b.d. b.d. 2.77 94 1.83 1.5 70 b.d.
T1+3.4 9.4 25 85 14 b.d. 38 b.d. 16 1.93 64 1.3 1.3 20 b.d.
AC+4 9.6 77 93 9 b.d. 33 b.d. 8.8 1.64 160 0.92 0.78 30 b.d.
AC+1.8 9.6 78 43 10 b.d. 30 b.d. 11 1.47 170 0.99 0.78 30 b.d.
T2+1 18.0 69 230 21 b.d. 51 b.d. b.d. 2.6 120 1.6 1.7 25 b.d.
T1+2.5 43.0 25 200 19 b.d. na na 40 b.d. b.d. 2.61 na 1.7 1.4 na na na na
AC0 6.5 74 74 16 b.d. 35 b.d. 7.5 1.42 240 0.94 0.83 40 b.d.
T2+18 140 85 80 9.5 b.d. 29 b.d. b.d. 2.18 340 1.1 0.63 35 b.d.
T2+50 37.0 30 63 18 b.d. 41 b.d. 22 3.16 380 2 1 25 b.d.
OMB-MN 13 96 76 26 58 bd b.d. 3.34 570 2.25 1.7 130 74
AC+8 59 71 44 7 bd bd b.d. 1.25 540 0.61 0.52 15 b.d.
T1+15.7 16 150 4 21 23 50 b.d. 3.36 500 1.75 0.69 25 b.d.
AC-6 28 220 66 66 95 bd b.d. 8.62 180 6.13 3.2 50 150
OMB-SH 31 230 96 66 120 bd b.d. 9.69 220 6.97 3.52 75 180
AC-0.3  233 25 16 4 131 16 56 331 3.9 3.07 67 19.9 287 82.9
T1+0.1 10 260 30 17 86 bd 2.43 1000 1.56 1 170 40
AC-2 28 250 22 73 91 bd 9.7 310 6.73 3.5 65 190
AC-4 13 170 12 39 59 60 6.49 440 4.43 2.5 50 74
T1+76.1 12 250 12 62 49 70 5.67 495 2.94 1.8 70 51
T2-7 85 280 44 72 490 55 8.88 310 5.88 5.95 230 bd
T2-0 61 300 21 82 440 bd 10.5 220 7.33 6.1 240 bd
T2-70 41 200 54 55 230 70 8.38 440 5.79 4.2 370 160
T2+12 60 300 38 85 590 bd 11.7 350 7.15 6.5 730 bd
T1-0.1 95 120 33 49 500 bd 5.97 450 3.34 6 1100 bd
T1-3.9 36 260 31 73 150 60 9.59 390 6.11 4.1 250 170

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 8.3 13.0 2.4 6.6 1.4 0.3 1.9 0.2 1.5 0.3 0.9 0.1 0.6 0.1
T1+0.45 4.3 6.4 2.4 0.62 0.16 0.10 0.26 0.024
T1+0.50 5.8 8.3 4.6 0.93 0.19 0.16 0.36 0.055
T1+5.9 9.1 13.6 6.8 1.37 0.24 0.21 0.63 0.085
T1+4.0 8.1 12.8 6.3 1.31 0.27 0.19 0.58 0.080
T2+15 6.5 11.3 5.7 1.26 0.26 0.20 0.63 0.086
T1+3.0 7.9 11.7 6.0 1.29 0.31 0.20 0.50 0.075
T1+4.5  13.2 19.7 2.53 10.3 1.8 0.44 2.02 0.31 1.6 0.33 0.94 0.13 0.8 0.11
T2+10 7.4 12.3 5.9 1.35 0.29 0.19 0.57 0.072
T1+2.5  10.4 16.5 2.17 8.7 1.6 0.41 1.72 0.26 1.37 0.28 0.76 0.09 0.7 0.18
T2+7 9.5 14.9 8.8 1.46 0.29 0.22 0.65 0.085
T2+4 9.0 14.4 7.3 1.46 0.34 0.25 0.60 0.088
T1+3.4 10.0 16.7 9.0 2.01 0.39 0.33 0.75 0.099
AC+4 6.6 11.1 5.7 1.17 0.26 0.17 0.49 0.069
AC+1.8 5.7 9.2 4.4 1.00 0.23 0.15 0.41 0.048
T2+1 10.6 15.6 7.3 1.60 0.34 0.24 0.70 0.077
T1+2.5 11.1 17.1   8.5 1.86 0.43   0.28         0.75 0.100
AC0 5.7 9.4 5.0 1.05 0.28 0.16 0.41 0.059
T2+18 10.9 17.5 7.5 1.54 0.35 0.22 0.57 0.075
T2+50 13.2 17.6 11.0 2.04 0.44 0.32 0.76 0.110
OMB-MN
12.3
18.7
10
2.39
1
0.35
0.77
0.12
AC+8
5.7
9.1
4.6
0.906
0.21
0.13
0.38
0.064
T1+15.7
13.6
18
10
2.23
0.465
0.33
0.77
0.12
AC-6
28.5
43.5
20
3.95
0.672
0.64
2.2
0.31
OMB-SH
34.3
49.3
21
3.8
0.779
0.607
2.15
0.313
AC-0.3 
23.3
37
4.9
20.3
3.8
0.84
4.16
0.62
3.39
0.69
2
0.26
1.8
0.26
T1+0.1
9.61
12.3
5.9
1.12
0.27
0.16
0.6
0.089
AC-2
32.8
50.7
24
5.36
0.97
0.793
2.5
0.35
AC-4
21.7
37.4
20
4.67
1.2
0.692
1.8
0.26
T1+76.1
23.4
31.1
16
3.45
0.815
0.502
1.4
0.2
T2-7
36.1
59.6
39
8.4
1.92
1.17
2.8
0.38
T2-0
36.5
52.2
26
5.79
1.12
0.853
2.7
0.378
T2-70
30.8
50.2
27
5.63
1.23
0.845
2.48
0.343
T2+12
37.8
56.5
29
6.21
1.23
0.9
2.7
0.397
T1-0.1
27.5
39.8
29
6.56
1.6
0.92
2.5
0.34
T1-3.9
33.6
52.8
30
6.01
1.3
0.87
2.6
0.35

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 22.59 13.58 12.4 9.32 5.89 3.47 4.35 3.67 2.32 0.81 0.69 9.77
0.8312
0.6877
  
T1+0.45 11.7 6.7 5.1 3.4 2.7 1.8 1.97 1.7 1.0 0.864 0.799 11.18
 
T1+0.50 15.8 8.7 8.7 6.5 4.0 2.2 3.13 2.8 1.5 0.739 0.616 10.89
 
T1+5.9 24.8 14.2 13.1 9.6 5.9 2.8 4.27 3.6 2.5 0.787 0.548 9.76
T1+4.0 22.1 13.4 12.0 8.9 5.7 3.1 3.93 3.3 2.3 0.821 0.657 9.44
T2+15 17.7 11.8 10.4 8.0 5.5 3.0 4.02 3.4 2.5 0.868 0.638 6.97
T1+3.0 21.5 12.2 11.5 8.4 5.6 3.6 4.05 3.4 2.0 0.776 0.749 10.68
T1+4.5  36.0 20.6 18.5 14.5 7.8 5.1 6.6 5.3 3.2 0.799 0.705 11.15
T2+10 20.2 12.9 11.2 8.3 5.8 3.3 3.97 3.3 2.3 0.857 0.692 8.77
T1+2.5  28.3 17.2 15.8 12.2 6.9 4.7 5.6 4.5 2.8 0.814 0.755 10.04
T2+7 26.0 15.6 15.8 12.4 6.3 3.3 4.50 3.8 2.6 0.768 0.625 9.91
T2+4 24.5 15.0 13.7 10.3 6.3 3.9 4.90 4.3 2.4 0.820 0.702 10.14
T1+3.4 27.2 17.5 16.3 12.7 8.7 4.5 6.56 5.7 3.0 0.827 0.594 9.00
AC+4 18.0 11.6 10.5 8.0 5.1 3.0 3.52 2.9 2.0 0.844 0.708 9.10
AC+1.8 15.5 9.6 8.41 6.2 4.3 2.6 3.07 2.6 1.7 0.841 0.726 9.39
T2+1 28.9 16.3 14.5 10.3 6.9 3.9 4.91 4.1 2.8 0.797 0.670 10.23
T1+2.5 30.2 17.9 16.3 12.0 8.1 4.9 5.73 4.8 3.0 0.805 0.728 10.00
AC0 15.5 9.8 9.2 7.0 4.5 3.2 3.26 2.8 1.7 0.821 0.836 9.39
T2+18 29.7 18.3 14.9 10.5 6.7 4.0 4.58 3.8 2.3 0.869 0.728 12.92
T2+50 36.0 18.4 20.5 15.5 8.8 5.1 6.45 5.5 3.1 0.677 0.670 11.74
OMB-MN
33.5
19.5
18.8
14.1
10.3
11.5
7.22
6.0
3.1
0.779
1.330
10.79
      
AC+8
15.5
9.5
8.7
6.5
3.9
2.4
2.70
2.2
1.5
0.820
0.742
10.14
      
T1+15.7
37.1
18.8
19.4
14.1
9.7
5.3
6.79
5.7
3.1
0.701
0.660
11.94
      
AC-6
77.7
45.5
39.5
28.1
17.1
7.7
12.77
11.0
8.9
0.821
0.523
8.75
      
OMB-SH
93.5
51.5
43.4
29.5
16.5
9.0
12.17
10.5
8.7
0.809
0.633
10.78
      
AC-0.3
63.5
38.7
35.8
28.6
16.5
9.7
13.6
10.7
7.3
0.811
0.646
8.75
T1+0.1
26.2
12.9
12.2
8.3
4.8
3.1
3.33
2.8
2.4
0.720
0.772
10.82
      
AC-2
89.4
53.0
46.7
33.8
23.2
11.1
16.31
13.7
10.1
0.820
0.573
8.87
      
AC-4
59.1
39.1
36.0
28.1
20.2
13.8
14.22
11.9
7.3
0.847
0.813
8.15
      
T1+76.1
63.8
32.5
31.8
22.5
14.9
9.4
10.38
8.7
5.6
0.721
0.752
11.29
      
T2-7
98.4
62.3
66.6
54.9
36.4
22.1
24.55
20.2
11.3
0.769
0.739
8.71
      
T2-0
99.5
54.5
51.0
36.6
25.1
12.9
17.57
14.7
10.9
0.766
0.613
9.14
      
T2-70
83.9
52.5
49.5
38.0
24.4
14.1
17.29
14.6
10.0
0.814
0.689
8.39
      
T2+12
103.0
59.0
55.5
40.8
26.9
14.1
18.64
15.5
10.9
0.781
0.632
9.46
      
T1-0.1
74.9
41.6
50.0
40.8
28.4
18.4
19.26
15.9
10.1
0.680
0.786
7.43
      
T1-3.9
91.6
55.2
54.6
42.2
26.0
14.9
18.02
15.0
10.5
0.780
0.690
8.73
      

Isotopes - stable
Sample
 Lithology TC % TOC % Sulfide S % HCl soluble Fe % FeII % Pyrite Fe Total Reactive Fe DOP Mn % CO2 % δ13C pdb δ18O pdb δ18O smow Stotal % δ34S sulfide Carbonate composition EPMA
Tetzintla                  
T1+223.5 LS 9.66 0.5 0.36 9.43 4.35 0.31 9.74 0.032
T1+171 LS 8.54 0.43 0.24 0.32 0.05 0.21 0.53 0.395
T1+165.5 LS bd -1.09 -4.70 26.0 Ca100
T1+165 LS bd 2.30 -4.00 26.7 Ca100
T1+162.5 LS bd 2.44 -4.50 26.2 Ca100
T1+161.5 LS 10.36 0.25 0.15 0.23 0.04 0.13 0.36 0.362
T1+152.8 LS bd 2.54 2.00 32.9 Ca100
T1+151.8 LS 9.12 1.81 1.38 0.72 0.05 1.20 1.92 0.625
T1+140.9 LS bd 2.36 -4.80 25.9 Ca100
T1+140.6 LS 7.7 0.28 0.29 0.4 0.05 0.25 0.65 0.387 bd 2.35 -5.20 25.5 Ca100
T1+135 BSh 7.5 2.39 1.69 2.06 0.22 1.47 3.53 0.417
T1+130.6 LS 7.55 0.99 1.31 0.38 0.02 1.14 1.52 0.750
T1+124 LS 8.41 0.89 2.54 0.41 0.17 2.21 2.62 0.844
T1+120.7 LS bd 2.40 5.90 36.9 Ca100
T1+102.6 LS 7.28 3.32 1.75 0.51 0.01 1.52 2.03 0.749
T1+101 BSh 7.05 1.74 2.75 0.56 0.04 2.40 2.96 0.811
T1+94.5 LS bd 1.00 -6.10 24.6 Ca100
T1+87.9 LS 8.18 1.39 2.55 0.36 0.05 2.22 2.58 0.861 bd 1.01 6.60 37.7 Ca100
T1+78.1 LS 0.5 0.75 -6.70 24.0 Ca97Mn03
T1+71.5 LS 8.26 1.24 2.09 0.41 0.02 1.82 2.23 0.816 1.5 1.19 -5.90 24.8 1.38 -19.4 Ca100
T1+64.9 LS 0.5 0.77 -6.60 24.1 Ca100
T1+58.4 BSh 5.9 3.16 2.88 0.26 0.01 2.51 2.77 0.906 0.5 -0.20 -6.70 24.0 Ca100
T1+55.1 LS 2 -1.52 -6.50 24.2 Ca100
T1+51.81 LS 1 -1.23 -5.80 24.9 0.32 -7.5 Ca100
T1+51.8 LS 1 -1.29 -7.60 23.0 Ca100
T1+47.91 LS 2.5 0.87 -5.60 25.1 Ca82Mn11
T1+47.9 LS 2.5 1.71 2.00 32.9
T1+45.3 LS 10.36 0.91 0.44 0.2 0.04 0.38 0.58 0.657 1.5 -19.4 -4.80 25.9 0.32 -14.4 Ca94Mn03
T'1+38.7 LS 8.38 1.01 1.26 0.51 0.07 1.10 1.61 0.683
T1+35.4 LS 5 -1.22 -5.30 25.4 Ca77Mn19
T1+33.8 LS bd 1.07 -6.00 24.7 Ca100
T1+32.1 BSh 9 -1.04 -5.30 25.4 1.67 -30.2
T1+28.5 LS 6 0.06 -2.90 27.9
T1+27.8 LS 7.5 -0.35 -3.90 26.8 0.87 4.3
T1+27.5 BSh 1.67 0.9 1.38 0.51 0.05 1.20 1.71 0.702
T1+26.95 LS 8 -13.7 -5.40 25.3 Ca100
T1+26.7 LS 8.5 -0.68 -5.50 25.2
T1+26.5 LS 8.5 -7.09 -5.20 25.5 Ca78Mn18
T1+25.6 LS 7.5 -1.93 -4.90 25.8 -22.6
T1+22.3 LS 7.37 0.73 3.29 1.81 0.2 2.87 4.68 0.613 5.5 -2.11 -4.60 26.1 1.70 12.5
T1+22.2 BSh 2.74 0.88 0.45 0.83 0.12 0.39 1.22 0.321
T1+21.7 LS 7.87 0.44 0.54 0.7 0.17 0.47 1.17 0.402 6 26.80 -5.20 5.50 36.5 Ca100+Ca53Mn47
T1+19 LS 8.24 0.97 0.94 0.88 0.08 0.82 1.70 0.482 7 -4.13 -0.50 30.3 Ca61Mn34
T1+12.5 LS 8.46 0.92 0.95 3.56 2.04 0.83 4.39 0.189 7 30.80 -5.56 -3.60 27.1 0.48 12.3 Mn84Ca16+Ca58Mn42
T1+10.9 LS bd 1.17 -6.30 24.4 2.34 -26.8 Ca100
T1+08.9 LS 9 0.63 0.38 0.91 0.7 0.33 1.24 0.267
T1+08.5 MN_ORE 0.52 -7.20 23.4 0.16 -0.6 Mn84Cal6+Ca58Mn42
T1+05.9 MN_ORE 7.55 0.66 0.15 4.31 1.5 0.13 4.44 0.029 30 30.62 -7.93 -5.00 25.7 0.06 -21.6 Mn88Ca12+Ca84Mn16
T1+04.5 MN_ORE 7.25 1.04 0.1 8.42 3.3 0.09 8.51 0.010 30 -16.3 -3.00 27.8 0.10 4.6 Mn100
T1+04.0 MN_ORE 7.03 0.79 0.38 5.48 2.84 0.33 5.81 0.057 30 32.52 -1.58 -4.30 26.4 0.06 -5.3 Mn100
T1+03.4 MN_ORE 7.35 0.93 0.12 5.69 2.41 0.10 5.79 0.018 30 31.77 13.08 -4.10 26.6 0.71 2.1 Mn100
T1+03.0 MN_ORE 7.26 0.46 0.36 4.43 1.73 0.31 4.74 0.066 30 32.03 -12.6 -2.90 27.9 0.10 8.0 Mn100
T1+02.5(=WR2) MN_ORE 6.58 0.96 0.1 4.16 2.29 0.09 4.25 0.021 27.8 30.23 -15.4 -3.30 27.5 0.26 8.3 Mn100
T1+02.0 MN_ORE 7.73 1.06 0.05 11.12 5.56 0.04 11.16 0.004 27.8 28.78 -5.63 -3.20 27.6 0.42 6.7 Mn100+Ca100
T1+01.5 MN_ORE 8.85 0.54 1.02 0.95 0.42 0.89 1.84 0.483 27.8 34.45 14.81 11.3 Mn100
T1+00.5 MN_ORE 11.06 1.13 0.11 5.81 0.8 0.10 5.91 0.016 18 28.64 -11.7 -3.20 27.6 0.16 -1.2 Mn100
T1+00.45 MN_ORE 6.01 0.31 5.93 4.54 1.3 5.17 9.71 0.532 18 22.13 11.64 10.7 (Mn,Fe,Mg,Ca)C03+FeS2
T1+00.1 LS 10.19 0.94 0.88 0.3 0.15 0.77 1.07 0.719 2 36.12 5.43 0.20 31.1 0.80 -34.9 dolomite
T1+00.01 BSh 6.87 2.43 9.27 1.17 0.13 8.07 9.24 0.873 2 25.21 0.92 -6.20 24.5 3.53 -34.9 Ca100
T1-00.1 BSh 6.02 2.11 5.78 0.62 0.12 5.03 5.65 0.890 20.06 -3.90 -5.90 24.8 1.60 6.7 Ca100
T1-03.9 BSh 6.11 1.54 3.48 0.66 0.27 3.03 3.69 0.821 15.75 0.12 -7.40 23.2 1.38 -35.5 Ca100
T1-07.2 BSh 5.47 2.01 3.17 0.88 0.31 2.76 3.64 0.758
T1-13.8 BSh 5.55 1.45 2.73 0.89 0.33 2.38 3.27 0.728 20.06 0.26 -24.0 Ca100
T1-17.1 BSh 5.86 1.77 3.06 1.29 0.31 2.67 3.96 0.674
T1-19.0 LS 7.65 1.04 2.87 0.78 0.21 2.50 3.28 0.762 32.78 0.84 -6.20 24.5 2.31 -30.8 Ca100
T1-20.3 BSh 5.35 2.27 3.79 1.05 0.15 3.30 4.35 0.759 14.08 1.03 -6.70 24.0 2.18 -35.5 Ca100
T1-20.35 BSh 1.99 0.88 8.68 2.8 0.41 7.56 10.36 0.730
T1-20.4 BSh 5.29 2.23 3.01 1.2 0.37 2.62 3.82 0.686
T1-24.9 BSh 6.21 1.36 2.54 0.69 0.47 2.21 2.90 0.762 22.53 1.19 -6.50 24.2 1.70 -29.4 Ca100
T2+41.5 LS 0.63 -2.7 Ca87Mn13
T2+36.88 LS 0.63 Ca93Mn07
T2+33.5 LS 0.67 -31.6 Ca82Mn18
T2+28.96 MN-LS 0.68 -29.3 Ca77Mn23
T2+19.8 MN-LS 6.21 -8.17 -3.30 27.5 0.75 19.7 Ca67Mn33+Mn79Ca21
T2+15.24 MN_ORE 5.13 -13.6 -0.3 Mn94Ca06
T2+10.67 MN_ORE 4.98 -7.80 -15.7 14.7 0.62 -1.4 Ca68Mn32
T2+07.6 MN_ORE 5.96 -2.84 -4.70 26.0 0.4 -1.0 Ca85Mn15
T2+04.6 MN_ORE 6.1 -8.22 -2.90 27.9 0.03 -8.4 Mn86Ca14
T2+03.7 LS 1.79 -0.63 -7.50 23.1 0.18 -28.0 Ca100
T2+03.05 MN_ORE 5.79 -10.3 -2.00 28.8 0.02 -23.9 Mn91Ca0.9
T2+00.3 MN_ORE 4.8 -14.5 -2.80 28.0 0.02 -0.7 Mn100
T2-07.3 BSh 2.6 -0.91 -7.40 23.2 0.72 -32.0 Ca100
T2-09.1 BSh 2.42 -0.03 -7.00 23.6 0.25 -27.6 Ca100
T2-12.8 BSh 2.99 -0.32 7.20 38.3 0.42 -29.6 Ca100
Acoxcatlan
ACO+2.45 MN_LS 8.06 -3.43 5.80 36.8 Ca57Mn43+Ca69Mn31
ACO+2.44 MN_LS 8.31 -3.90 0.30 31.2 1.8 8.4 Ca52Mn48+Ca89Mn11
ACO+2.4 MN_ORE 7.72 -6.20 -4.30 26.4 Mn91Ca09+Ca55Mn45
ACO+2.1 MN_ORE 7.86 -4.87 -5.00 25.7 0.08 11.4 Ca5IMn49+Mn88Ca12
ACO+1.8 MN_ORE 7.57 -5.95 -4.20 26.5 0.02 Mn90Ca10+Ca56Mn44
ACO+1.22 MN_ORE 7.69 -5.13 -4.50 26.2 0.1 6.4 Mn90Ca10+Ca58Mn42
ACO+0.1 MN_ORE 7.51 -5.50 -4.20 26.5 0.23 5.0 Mn92Ca08+Ca52Mn48
ACO+0 MN_ORE 7.89 -5.78 -4.10 26.6 0.07 7.9 Mn91Ca09+Ca52Mn48
ACO-1.22 BSh 4.72 -1.03 -8.10 22.5 0.68 -31.5 Ca100+dolomite
ACO-0.87 BSh 3.66 -0.48 -7.70 22.9 Ca100+dolomite
ACO-0.61 BSh 2.79 -0.97 -8.60 22.0 0.8 -34.9 Ca100+dolomite
ACO-0.27 BSh 2.53 -1.38 -8.50 22.1 Ca100+dolomite
Nonoalco
NON+18.29 MN_LS 0.63 -24.9 Ca57Mn43+Ca77Mn23
NON+15.24 MN_LS 5.92 -3.77 -8.20 22.4 0.88 5.5 Ca57Mn43+Ca77Mn23
NON+9.14 MN_LS 4.38 -4.95 -8.00 22.6 1.1 -6.0 Ca52Mn48+Ca95Mn05
NON+8.12 MN_LS 7.42 -5.42 -7.60 23.0 0.13 -2.8 Ca67Mn33+Mn91Ca09
NON+7.62 MN_ORE 4.36 -5.09 -7.90 22.7 1.85 -10.4 Mn55Ca45+Ca87Mn13
NON+7.57 MN_LS 1.97 -5.29 -7.50 23.1 0.22 Ca67Mn33+Mn91Ca09
NON+6.1 LS 4.34 0.01 -4.70 26.0 <0.02 -5.8 Ca100
NON+4.57 LS 3.03 -1.42 -5.30 25.4 <0.02 Ca100
NON+3.05 MN_LS 7.47 -4.32 -6.90 23.7 0.08 Ca65Mn35
NON+1.23 MN_ORE 7.49 -4.69 9.20 40.3 0.28 -8.3 Ca77Mn23+Mn95Ca05
NON-2.23 BSh 1.97 -2.26 -15.8 14.6 0.7 -17.9 Ca100
NON-0.42 BSh 1.94 -3.00 -16.6 13.7 0.82 -17.8 Ca100
Unmineralized
Santiago
SAN+4 LS 0 0.33 -16.8 Ca100
SAN+3.7 LS 0 0.3 -10.9 Ca100
SAN+1 LS 0 0.25 -9.9 Ca100
SAN-1 BSh 0 0.28 -19.1 Ca100
Huitepec
HUI-0.1 BSh 0 -1.41 0.5 -31.8 Ca100
Comextititla
COM-0 BSh 0 0.65 -35.7 Ca100
negative and positive refer to distance below or above the base of the ore bed

Isotopes - radioactive
87Sr/86Sr
87Sr/86Sr
206Pb/204Pb

 
207Pb/204Pb
208Pb/204Pb
  
206Pb/204Pb

 
207Pb/204Pb
208Pb/204Pb
                
Sample
present day
Initial
present day
present day
present day
Initial
Initial
Initial
T +78.1
0.707310
0.70726
18.887
15.672
38.622
   18.472 15.652 38.406
T2 -70
0.707730
0.70761
18.864
15.632
38.609
   18.834 15.631 38.604
T2 -7
0.707830
0.70763
18.907
15.66
38.654
 18.599 15.645 38.557          
T2 +7
0.707700
0.70768
18.802
15.687
38.829
 18.666 15.680 38.760          
T1 +3.4
0.707450
0.70743
19.142
15.634
38.623
 18.412 15.598 38.390          
T1 +4
0.707360
0.70731
19.279
15.717
38.897
   18.581 15.683 38.634
ACO +2.5
0.707629
0.70730
19.973
15.745
39.205
 19.135 15.704 39.006          
MOL +1.5
0.707289
0.70705
19.339
15.701
38.814
   18.652 15.668 38.740

 

Ce anomaly MolangoEu anomaly Molango

C isotopes MolangoS isotopes Molango