Table 3

Average chemical composition (wt%) of Mn nodules from the East Siberian Arctic shelf. Chemical compositions of Mn nodules from other seas were summarized for comparison

Area	ARA12B-St52			ARA12B-St58i			Cook Island^a	Peru Basin^b	Baltic Sea^c
Area	Mn-rich zone	Fe-rich zone	Mapping composition	Mn-rich zone	Fe-rich zone	Mapping composition	Cook Island^a	Peru Basin^b	Baltic Sea^c
n	11	8	3	7	15	7	36	6	14
Mn	56.6 (41.9-62.9)†	9.8 (0.7-22.6)	40.6 (38.8-43.3)	41.3 (28.3-60.0)	6.4 (0.2-17.9)	10.3 (1.0-22.4)	17.1	36.8	13.7
Fe	2.1 (1.5-3.0)	28.8 (14.3-51.1)	5.2 (4.7-6.1)	11.2 (2.7-19.0)	30.9 (6.9-55.3)	19 (13.2-28.8)	16.9	5.5	16.6
Si	6.4 (3.8-12.1)	12.8 (3.0-19.7)	11.5 (9.7-12.7)	8.2 (5.9-11.9)	14.4 (4.5-33.7)	18.4 (6.7-25.5)	7.9	-	-
Al	2.1 (1.3-3.2)	3.1 (0.5-6.3)	3.6 (3.1-4.3)	2.3 (0.0-3.2)	2.7 (0.0-5.4)	3.9 (1.7-7.0)	3.4	1.4	-
Ca	1.4 (1.1-1.6)	1.8 (1.0-2.6)	1.1 (1.0-1.3)	1.6 (1.0-2.4)	1.7 (0.3-5.9)	2.7 (0.7-11.4)	1.4	1.7	-
Mg	0.5 (0.0-1.3)	0.3 (0.0-0.9)	1.0 (1.0-1.1)	0.8 (0.0-1.7)	0.2 (0.0-0.6)	0.8 (0.5-1.0)	2	1.7	-
K	1.4 (1.0-2.0)	1.8 (0.6-3.1)	1.7 (1.6-1.8)	1.4 (1.1-1.7)	1.7 (0.3-6.1)	1.6 (0.7-2.8)	1.8	2.1	-
Na	0.2 (0.0-1.5)	-	1.3 (1.2-1.5)	0.2 (0.0-1.3)	-	1.0 (0.0-1.6)	0.9	0.5	-
P	-	2.5 (0.5-6.0)	0.1 (0.1-0.3)	0.6 (0.0-1.4)	1.8 (0.1-4.4)	1.0 (0.4-2.2)	1.4	-	-
Mn/Fe	28.2 (13.9-41.5)	0.5 (0.0-1.3)	7.9 (7.1-8.3)	6.1 (1.5-22.1)	0.3 (0.0-1.5)	0.6 (0.0-1.1)	1.1	6.9	0.97

^aHein et al. (2015), ^bWegorzewski and Kuhn (2014), ^cBogdanov et al. (1995), Glasby et al. (1997), and Szamalet et al. (2018)

^†Note that the values in parentheses indicate the range of minimum to maximum values.

Econ. Environ. Geol. 2023;56:1~11 https://doi.org/10.9719/EEG.2023.56.1.1