Fjölrit RALA - 15.06.2004, Page 88

and Zn content in ferromagnetic minerals of Andosols, some positive correlations were found
as exemplified in Fig. 1.
As discussed above, many trace elements are concentrated in Andosols in spite that these
soils are formed with strong leaching. This is possibly due to high affinity of allophane,
imogolite, Al-humus and ferrihydrite to many multivalent cations. As a result, content of
many trace elements in Andosols is higher than that of other soils in Japan. Thus, the content
of noncrystalline materials, i.e., Andosolization, and rock type of parent materials strongly
affect the elemental composition of volcanic ash soils.
Table 1 Correlation between content of Sio, Alo and Feo and total content of 57 elements.
The coefficients shown in bold face is significant at p=0.1%. Notably high correlation
coefficients of 0.5-0.69 and 0.7 or greater were highlighted with gray and black, respectively.
Sio Al o Feo Li Be C N Na Mo Al Si P K Ca So
Si 0 1.00 0.02 0.49 -0.45 -0.46 -0.39 0.00 0.80 -0.02 -0.32 -0.21 -0.32 0.39
Al o 0.93 1.00 -0.04 0.46 -0.19 -0.24 -0.56 -0.02 0.73 -0.27 -0.22 -0.30 -0.47 0.36
Feo 0.37 0.46 1.00 -0.16 0.10 0.10 0.16 -0.43 0.02 o * 09 -0.61 I 0.12 -0.47 -0.10 0.58
n* 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95
*: The number of samples.
Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge Rb Sr Y Zr
Si o 0.49 0.18 0.11 0.34 0.41 0.27 0.14 0.08 -0.10 0.17 0.36 -0.04 -0.33 0.47 0.50
Al o 0.49 0.17 0.24 0.30 0.41 0.31 0.24 0.11 -0.14 0.14 0.38 -0.07 ) -0.51 0.42 0.40
Feo 0.79 I 0.S8 0.48 0.42 0.72 0.71 0.48 | 0.74 0.04 0.42 0.63 -0.27 0.05 0.39 0.15
n t SL 95 95 95 95 95 95 95 95 74 74 25 §§ 95 9§-
Nb Mo Ag Cd Sn Sb Cs Ba La Ce Pr Nd Sm Eu Gd
Si o 0.34 -0.11 -0.10 -0.25 0.29 -0.04 -0.04 -0.10 0.29 0.41 0.39 0.41 0.44 0.49 0.51
Al o 0.30 -0.19 -0.09 -0.30 0.14 0.01 -0.02 -0.21 0.29 0.37 0.37 0.38 0.39 0.43 0.46
Feo 0.03 -0.06 0.17 0.03 0.25 -0.03 -0.14 -0.05 0.04 0.09 0.19 0.27 0.26 0.52 0.44
n 95 86 74 74 33 33 95 95 95 95 95 95 95 95 95
Fig. 1 Relationship between Sio and total element content (Examples of Cs, La and U).
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