Ananai

Location - Japan

Age (of portore) - 265 Ma

Original size - 0.06 million tonnes of Mn

References

Fujinaga, K., Nozaki, T., Nishiuchi, T., Kuwahara, K., and Kato, Y., 2006, Geochemistry and origin of Anani stratiform manganese deposit in the Northern Chichibu belt, central Shikoku, Japan: Resource Geology 56, p. 399-414.

Kuwahara, K., Fujinaga, K., and Kato, Y., 2006, Radiolarian age of manganese ore and red chert from Ananai stratiform manganese deposit in the northern Chichibu Belt, central Shikoku, Japan: Resource Geology, v. 56, p. 415-421.

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

Major Elements, oxide percent

 

 

 

%

%

%

%

%

%

%

%

%

%

%

MnO

Fe2O3tot

SiO2

Al2O3

CaO

MgO

K2O

Na2O

TiO2

P2O5

LOI
avg
 Mn carb
34.1
7.49
41.8
3.94
3.45
1.38
0.38
1.27
0.56
0.44
5.31
745a
 Nagakawara 57.6 0.07 26.4 5.78 1.02 0.85
0.005
 0.08 0.14 0.10 7.89
634a
 Nagakawara 51.4 0.49 34.9 2.02 2.09 0.64
0.005
 0.07 0.11 0.19 8.09
633a
 Nagakawara 49.9 3.63 26.4 3.44 6.96 1.08
0.23
 0.68 0.18 0.28 7.25
650
 Nagafuchi 41.8 10.1 29.4 3.72 5.28 1.28
0.005
 0.09 0.77 0.63 6.90
649
 Nagakawara 39.8 6.70 31.5 4.39 9.83 1.12
0.005
 0.07 0.75 0.59 5.29
735
 Nagakawara 39.0 9.86 25.9 6.52 4.66 3.03
2.84
 0.82 2.01 2.62 2.76
651
 Fukinaro 38.3 9.92 33.1 3.35 6.47 1.59
0.005
 0.12 0.89 1.25 5.10
733
 Fukinaro 36.9 8.47 42.1 3.87 2.25 1.06
0.03
 2.97 0.16 0.26 1.89
626
 Fukinaro 34.4 8.23 45.7 0.48 6.12 0.20
0.005
 0.09 0.01 0.05 4.70
608
 Fukinaro 33.7 10.3 43.4 0.64 3.96 0.25
0.005
 0.05 0.01 0.06 7.63
621
 Fukinaro 32.5 9.51 50.0 0.60 1.22 0.23
0.005
 0.08 0.03 0.05 5.76
620
 Fukinaro 30.3 8.92 52.5 0.57 1.51 0.11
0.005
 0.09 0.02 0.06 5.93
744a
 Fukinaro 29.5 8.01 40.4 7.15 3.17 2.38
1.08
 3.15 2.11 0.54 2.52
624
 Nagakawara 28.4 7.41 53.8 0.54 1.51 0.24
0.005
 0.06 0.02 0.04 8.04
732
 Fukinaro 25.8 6.10 45.8 8.54 3.23 1.87
0.10
 6.36 0.45 0.57 1.17
737
 Fukinaro 23.8 14.5 37.1 9.26 1.74 3.33
2.27
 0.81 2.31 0.39 4.50
623
 Fukinaro 23.4 10.2 60.2 0.43 0.55 0.07
0.005
 0.06 0.02 0.13 5.01
734
 Nagafuchi 16.9 3.74 60.4 3.55 2.71 0.92
0.26
 2.49 0.17 0.20 8.70
736
 Fukinaro 15.3 6.16 56.0 9.92 1.25 5.96
0.43
 5.96 0.55 0.41 1.71

K2O below detection listed at 0.005 for averaging

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
nr
 5690 nr 56.7 41.7 21 nr 12.0 134 nr 13.6 6.12 405 2.55 1.87 73.6 25.4 183 44
745a
276 71.3 29.2 1.0 4.56 548 1.98 3.58 62.6 1.90 1.15 76.5 20.4 375 24.3
634a
7850 18.8 22 1.5 2.68 97 2.57 3.46 269 1.47 2.47 23.0 13.7 146 18.6
633a
1110 75.1 16.8 32 4.37 148 11.0 6.24 1963 2.95 3.50 57.4 25.8 170 30.1
650
6240 136 35.5 0.9 21.2 307 1.33 3.20 423 1.47 3.01 28.0 24.7 349 46.4
649
5840 112 76.7 12 25.4 178 1.51 3.14 437 1.42 5.25 495 25.8 236 51.7
735
2680 123 10.5 51 27.1 110 84.5 9.38 409 4.55 1.56 44.6 144 344 77.2
651
6340 151 27.9 1.6 27.0 291 4.92 4.40 463 2.04 3.75 90.0 34.4 363 60.2
733
37900 27.6 20.3 51 4.83 102 8.83 6.11 156 2.60 2.38 34.3 30.8 238 46.4
626
1720 3.07 3.2 0.1 0.47 36 0.57 1.00 109 0.26 0.88 33.9 2.14 27 3.32
608
2240 2.20 2.4 0.1 0.27 25 3.07 1.00 366 0.13 1.00 148 2.52 38 3.01
621
1310 3.35 2.6 0.2 0.64 35 1.13 1.00 162 0.33 1.00 49.4 2.67 38 4.24
620
868 2.83 2.8 1.1 0.40 22 2.02 1.00 237 0.22 0.74 3.9 2 28 3.2
744a
1670 18.9 6.27 81 49.4 167 42.7 6.61 883 6.49 1.98 26.2 36.5 277 106
624
266 2.86 3.1 1.2 0.52 31 1.22 1.00 48.3 0.30 0.68 64.8 1.95 28 3.47
732
1190 63.7 40.7 54 11.0 74 4.27 15.50 319 7.17 2.01 11.8 43.6 233 83.9
737
1660 172 438 25 28.8 208 56.8 24.00 408 2.99 0.71 103 19.5 171 131
623
8240 2.49 4.8 4.0 0.70 13 2.50 1.00 287 0.35 0.86 73.1 2.24 15 3.48
734
9200 76.5 15.5 21 4.97 64 13.4 5.86 461 3.00 0.56 13.7 11.5 189 44
736
11510   14.9 34.5 53   13.1 92   13.3 18.80 226 8.82 2.05 21.1 38.7 203 92.3

blank or nr = not reported; below detection listed at 1/2 the detection limit

Rare-earth elements, ppm

 
Sample
La
Ce
Pr
Nd
Sm
Eu

Eu corr
Gd
Tb
Dy 
Ho 
Er 
Tm 
Yb
Lu
avg
 24.1 38.5 5.5 21.8 4.3 1.8 1.7 4.1 0.5 3.6 0.7 2.0 0.3 1.9 0.3
745a 18.2 30.2 3.9 15.5 3.2 0.7 0.7 3.2 0.5 3.2 0.7 1.8 0.3 1.6 0.2
634a
 11.4 12.8 2.5 10.2 2.0 1.9 1.7 2.1 0.3 2.0 0.4 1.1 0.2 1.2 0.2
633a
 20.1 26.6 4.7 19.0 3.9 1.1 1.0 4.0 0.7 4.0 0.9 2.3 0.4 2.4 0.4
650
 11.0 17.3 2.5 9.6 1.9 1.7 1.5 1.9 0.3 1.6 0.4 1.2 0.2 1.3 0.2
649
 14.4 20.0 2.4 9.2 1.6 1.6 1.4 1.8 0.3 1.7 0.5 1.6 0.3 2.0 0.3
735
 158 231 32.9 130 23.0 7.4 7.3 22.3 0.2 19.0 4.0 10.7 1.5 9.2 1.4
651
 19.5 32.6 4.1 16.1 3.0 2.0 1.9 3.0 0.4 2.6 0.6 1.7 0.3 1.8 0.3
733
 20.3 25.4 4.4 18.2 3.7 1.5 0.6 3.8 0.6 3.6 0.8 2.2 0.3 2.3 0.4
626
 1.7 2.6 0.4 1.5 0.3 0.4 0.4 0.3 0.1 0.3 0.1 0.2 0.0 0.2 0.0
608
 1.6 2.1 0.3 1.1 0.3 0.5 0.5 0.3 0.0 0.3 0.1 0.2 0.0 0.2 0.0
621
 1.9 3.3 0.4 1.7 0.3 0.3 0.3 0.3 0.1 0.3 0.1 0.2 0.0 0.2 0.0
620
 1.7 2.7 0.4 1.3 0.3 0.2 0.2 0.3 0.0 0.3 0.1 0.2 0.0 0.2 0.0
744a
 49.2 95.9 12.2 49.0 9.6 3.0 2.9 8.3 1.2 6.3 1.2 3.0 0.4 2.2 0.3
624
 1.6 2.7 0.3 1.2 0.3 0.1 0.1 0.3 0.0 0.3 0.1 0.2 0.0 0.2 0.0
732
 60.7 95.3 15.0 59.5 11.8 2.7 2.6 10.9 1.7 9.5 1.9 4.7 0.7 4.1 0.6
737
 26.6 60.4 7.2 29.2 6.4 2.1 2.1 5.5 0.8 4.6 0.8 1.9 0.3 1.6 0.2
623
 2.1 3.2 0.4 1.5 0.4 1.7 1.5 0.4 0.1 0.3 0.1 0.2 0.0 0.2 0.0
734
 13.0 21.3 3.3 13.2 2.8 2.2 2.0 2.7 0.4 2.3 0.4 1.1 0.2 1.1 0.2
736
 25.4 46.0 6.7 28.1 6.1 3.4 3.1 6.0 0.9 5.7 1.2 3.4 0.5 3.4 0.5

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
 65.67 40.23 40.15 30.66 18.61 19.54 13.40 8.62 7.66 0.784 1.237 8.571 0.7473 2.1472 6.289
745a
 49.59 31.56 28.47 21.80 13.85 8.05 10.46 8.62 6.45 0.840 0.668 7.687
634a
 31.06 13.38 18.25 14.35 8.66 19.54 6.86 5.17 4.84 0.562 2.535 6.420
633a
 54.77 27.80 34.31 26.72 16.88 11.49 13.07 12.07 9.68 0.641 0.774 5.659
650
 29.97 18.08 18.25 13.50 8.23 17.24 6.21 5.17 5.24 0.773 2.413 5.718
649
 39.24 20.90 17.52 12.94 6.93 16.09 5.88 5.17 8.06 0.797 2.521 4.865
735
 430.52 241.38 240.15 182.84 99.57 83.91 72.88 3.45 37.10 0.751 0.985 11.605
651
 53.13 34.06 29.93 22.64 12.99 21.84 9.80 6.90 7.26 0.854 1.935 7.321
733
 55.31 26.54 32.12 25.60 16.02 6.90 12.42 10.34 9.27 0.630 0.489 5.964
626
 4.63 2.72 2.92 2.11 1.30 4.60 0.98 1.72 0.81 0.739 4.075 5.744
608
 4.36 2.19 2.19 1.55 1.30 5.75 0.98 0.00 0.81 0.710 5.093 5.406
621
 5.18 3.45 2.92 2.39 1.30 3.45 0.98 1.72 0.81 0.887 3.056 6.420
620
 4.63 2.82 2.92 1.83 1.30 2.30 0.98 0.00 0.81 0.767 2.037 5.744
744a
 134.06 100.21 89.05 68.92 41.56 33.33 27.12 20.69 8.87 0.917 0.993 15.112
624
 4.36 2.82 2.19 1.69 1.30 1.15 0.98 0.00 0.81 0.913 1.019 5.406
732
 165.40 99.58 109.49 83.68 51.08 29.89 35.62 29.31 16.53 0.740 0.701 10.004
737
 72.48 63.11 52.55 41.07 27.71 24.14 17.97 13.79 6.45 1.023 1.082 11.234
623
 5.72 3.34 2.92 2.11 1.73 17.24 1.31 1.72 0.81 0.818 11.460 7.095
734
 35.42 22.26 24.09 18.57 12.12 22.99 8.82 6.90 4.44 0.762 2.223 7.986
736
 69.21 48.07 48.91 39.52 26.41 35.63 19.61 15.52 13.71 0.826 1.566 5.048

Isotopes - no isotope data reported