Morro da Mina

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Morro da Mina.xlsx

Location - Brazil

Age (of protore) - 2700 Ma

Original size - 4.5 million tonnes of Mn

References

Herz, N., and Banerjee, S., 1973, Amphibolites of the Lafaiete, Minas Gerais, and the Serro do Navio manganese deposits, Brazil: Economic Geology, v. 68, p. 1289-1296.

Leverett, P., Williams, P.A., and Hibbs, D.E., 2008, Ca-Mg-Fe-rich rhodonite from the Morro da Mina Mine, Conselheiro Lafaiete: Mineralogical Record, v. 39, p. 125-130.

Horen, A., 1953, The manganese mineralization at the Merid Mine, Minas Gerais, Brazil, Unpublished Ph.D. Thesis, Harvard University, 224 p.

major elements

Major Elements, oxide percent (Horen Table 8)

 

 

 

%

%

%

%

%

%

%

%

%

%

%

MnO
Fe2O3t
SiO2
Al203
CaO
MgO
K2O
Na2O
TiO2
P205
LOI

Average

 

carbonate protore 43.1 5.29 24.6 5.63 3.46 4.12 bd bd 0.41 0.38 10.9
1 Merid 43.5 6.65 13.2 3.52 2.47 3.75 bd bd bd 0.68 19.6
2      Merid 43.8 5.83 18.0 4.47 2.64 3.81 bd bd bd 0.8 16.2
3 Merid 44.1 3.70 21.8 5.32 5.57 4.67 bd bd 0.44 bd 14.0
4 Merid 42.0 4.69 22.9 4.77 2.32 2.79 na na 0.26 0.17 16.8
5 Merid 34.7 7.83 35.9 10.7 3.80 2.53 na na 0.38 0.14 5.1
6 Piquiry 44.4 3.21 24.7 5.21 4.85 4.70 bd bd 0.63 bd 9.3
7 Piquiry 57.5 2.48 27.7 1.41 1.82 4.60 bd bd bd bd 4.6
8      Piquiry 35.1 7.94 32.4 9.67 4.20 6.08 bd bd 0.35 0.1 1.6

 

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

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

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

Isotopes

Sample
TC % TOC % Ccarb % δ13C pdb δ18O pdb δ18O smow Stotal % δ34S sulfide 87Sr/86Sr