Arkansas Mn Field

Location - western Arkansas, United States

Age (of portore) - 0.36 Ma

Original size - 0.1 million tonnes of Mn

References

Wagner, G.H., Konig, R.H., Vogelpohl, S., and Jones, M. D., 1979, Base metals and other minor elements in the manganese deposits of west-central Arkansas: Chemical Geology v. 27, p. 309-327.

Major Elements (% oxide)

 

 

Sample, dominant mineral

%

%

%

%

%

%

%

%

%

%

%

MnO

Fe2O3tot

SiO2

Al2O3

CaO

MgO

K2O

Na2O

TiO2

P2O5

LOI
average
oxide
 58.75 1.96 3.65 1.77        
1 psilomelane 58.74 0.29 0.55 0.08
2 psilomelane 58.35 0.43 0.55 0.08
3 psilomelane 53.57 0.43 0.55 0.02
4 cryptomelane 56.15 1.14 0.87 3.36
5 cryptomelane 55.12 0.72 0.59 2.93
6 cryptomelane 32.92 0.43 0.49 1.60
7 pyrolusite 60.16 0.29 0.25 0.75
8 cryptomelane 60.03 1.14 1.06 2.34
9 cryptomelane 68.42 0.29 4.89 2.17
10 cryptomelane 78.36 0.06 0.77 2.23
11 cryptomelane 76.42 0.06 1.25 2.95
12 cryptomelane 64.29 0.29 0.45 2.24
13 cryptomelane 72.29 1.72 1.00 2.52
14 cryptomelane 77.20 0.14 0.70 3.55
15 cryptomelane 57.45 0.14 10.46 1.87
16 cryptomelane 36.53 0.57 0.26 1.51
17 pyrolusite 58.35 0.72 2.38 1.04
18 lithiophorite 50.86 1.72 15.55 0.82
19 lithiophorite 63.64 1.29 0.42 0.76
20 cryptomelane 80.68 0.43 0.87 4.76
21 lithiophorite 58.09 0.14 13.15 1.41
22 psilomelane 55.51 1.29 1.19 0.13
23 cryptomelane 62.22 1.29 4.97 2.30
24 cryptomelane 63.90 0.43 1.27 2.16
25 cryptomelane 39.24 3.43 3.21 1.57
26 cryptomelane 54.48 5.72 5.21 3.13
27 psilomelane 53.19 3.43 0.66 0.45
28 cryptomelane 50.35 3.43 0.45 1.41
29 lithiophorite 45.18 10.01 18.61 0.07
30 cryptomelane 57.96 3.29 1.21 1.36
31 cryptomelane 66.74 5.29 3.25 2.66
32 cryptomelane 59.77 5.72 7.78 3.00
33 cryptomelane 69.71 2.43 1.55 2.07
34 cryptomelane 73.45 3.15 1.79 3.54
35 lithiophorite 51.64 3.72 6.48 1.18
36 lithiophorite 58.99 3.86 1.74 2.66
37 cryptomelane 66.48 6.44 1.36 2.98
38 cryptomelane 66.09 3.29 0.72 2.16
39 lithiophorite 44.79 0.86 0.00 0.39
40 lithiophorite 48.80 0.86 0.00 0.63
41 lithiophorite 50.35 0.00 12.28 1.37
42 lithiophorite 50.86 1.86 22.48 0.12

 

 

Trace elements

 

 

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
average
  
27048
 
3916
 
3129
   
894
               
1638
 
1 152000 360   530 80       310  
2 18700 900   240 150       330  
3 153000 1640   670 240       660  
4 18400 320   30 100       1450  
5 1400 170   250 60       50  
6 1700 830   30 260       800  
7 40700 1610   110 320       760  
8 14200 2380   660 370       1510  
9 2200 2700   1220 2820       1920  
10 1000 300   120 450       1150  
11 1100 600   110 320       1250  
12 26400 1120   190 200       1780  
13 1600 950   670 120       900  
14 1800 600   1250 290       740  
15 15200 1560   7420 2790       3030  
16 3100 840   440 410       980  
17 17600 3830   2000 1160       1180  
18 4700 3380   11100 4250       4660  
19 20200 1390   2240 940       1470  
20 600 300   130 330       1210  
21 4400 2720   4600 3950       4810  
22 128000 310   250 360       830  
23 21500 1540   2220 2000       3000  
24 45600 980   820 260       1240  
25 15300 2710   4120 760       690  
26 14500 4940   3760 1320       1360  
27 112000 590   600 240       180  
28 13300 980   130 170       690  
29 2300 16100   12600 5100       3800  
30 32200 2060   40 720       1390  
31 29200 5800   2350 1650       1950  
32 5600 2070   300 1370       2080  
33 34600 1260   1230 400       1490  
34 100 430   750 160       880  
35 104400 140   6770 2340       3240  
36 17200 1080   2970 2240       2610  
37 28800 1870   840 340       1190  
38 24200 1850   450 260       1360  
39 3100 11260   13600 8210       2440  
40 2200 12000   15900 10900       2840  
41 1100 57000   10500 7050       1780  
42 800 11000   17200 9900       2800  

na = not analyzed; bd = below detection

 

Rare-earth elements

not reported