Table T3. Elemental concentrations in the ferromanganese crusts as measured by inductively coupled plasma mass spectrometry.

Table T3. Elemental concentrations in the ferromanganese crusts as measured by inductively coupled plasma mass spectrometry.


Sample/Subsample ID	Average depth (mm)	Major elements (wt%)							Mn/Fe	Minor elements (ppm)
Sample/Subsample ID	Average depth (mm)	Co	Ni	Mn	Fe	Cu	Fe	Mn	Mn/Fe	Nd	Pb
Seafloor surface crust (1196-DR-02)
Fk640	0.5	0.015	0.147	1.428	13.527	0.043	79.53	8.39	0.11	15.9	103.1
Seafloor surface crust (1196-DR-04)
Fk609	0.5	0.003	0.024	0.176	2.000	0.001	81.44	7.16	0.09	4.0
Fk610	15.0	0.037	0.146	4.099	18.968	0.004	76.08	16.44	0.22	17.5	210.4
Seafloor surface crust (194-1196B-1R) Fe-rich laminae
Fk628	0.5	0.036	0.118	1.799	16.452	0.005	82.93	9.07	0.11	6.2	84.0
Fk629	2.0	0.070	0.261	3.110	18.105	0.005	73.67	12.65	0.17	6.8	117.4
Fk630	4.0	0.040	0.177	0.808	25.972	0.002	89.65	2.79	0.03	5.8	126.8
Fk631	6.0
Fk632	8.0	0.049	0.306	1.362	13.958	0.004	73.83	7.20	0.10	9.1	57.6
Fk633	10.0	0.037	0.147	1.484	26.059	0.004	88.55	5.04	0.06	8.8	75.7
Fk634	12.0	0.016	0.044	0.794	24.255	0.002	94.50	3.09	0.03	5.1	67.8
Mn-rich laminae
Fk635	1.0	0.107	0.492	12.999	2.426	0.011	11.27	60.41	5.36	6.1	47.4
Fk636	3.0	0.088	0.511	10.944	2.769	0.010	13.98	55.26	3.95	7.5	63.1
Fk637	5.0	0.098	0.526	11.725	4.356	0.010	19.43	52.29	2.69	7.6	100.6
Fk638	7.0	0.121	0.425	13.788	6.046	0.009	23.82	54.33	2.28	7.0	82.8
Fk639	9.0	0.055	0.190	5.406	4.068	0.004	33.98	45.17	1.33	4.6	25.8
Deep subsurface crust (194-1194A-14X-1)
Fk641	0.3	0.008	0.024	0.066	52.940	0.001	99.27	0.12	0.0013	2.4	37.3
Fk642	0.8	0.009	0.030	0.084	52.977	0.000	99.09	0.16	0.0016	5.3	38.1