Application of two-phase leaching method in the study of ferromanganese nodule mineralization

doi:10.3969/j.issn.1001-909X.2023.02.007

Abstract

Abstract:

Two-phase leaching method can separate hydrogenetic and residual mineral phases of ferromanganese nodules, which will provide valuable information with the research of ferromanganese nodule mineralization and pale-environment. In order to study the applicability of the two-phase leaching method in the nodule mineralization research for different types of nodules compared to the bulk sample results, the ferromanganese nodules samples from six stations were selected, which were collected on the seamounts area of western Pacific Ocean and CC Zone of eastern Pacific Ocean, respectively. Geochemical and mineralogical compositions of the bulk samples were analyzed, and elements compositions of the hydrogenetic and residual mineral phases were analyzed, which were obtained using the two-phase leaching method. The results indicated that the mass ration variation of the residual mineral phases was not obvious with about 14.0%-17.6%, which had high contents of Nb, Rb, Ta, Ti, Zr. Contents and relevant rations of elements such as Co, Ni, Cu, Zn, Sr, REY in the hydrogenetic mineral phase showed similar features with those in the bulk samples. Proportion of elements contents like Ti, Nb, Sr between hydrogenetic and residual mineral phases showed well negative correlation with Mn/Fe values, which probably could be regarded as index for ferromanganese nodule mineralized environment research in the future.

Key words: two-phase leaching method, ferromanganese nodules, seamounts area of the western Pacific Ocean

CLC Number:

P744

ZHU Feiyang, LI Huaiming, YAO Pengfei, WANG Xiao, ZHU Jihao, LÜ Shihui, LUO Yi, ZHOU Li’na, LIU Yuwei, TANG Yutong. Application of two-phase leaching method in the study of ferromanganese nodule mineralization[J]. Journal of Marine Sciences, 2023, 41(2): 83-93.

Figures/Tables 11

References 33

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样品编号	采样区域	经度	纬度	水深/m	形态特征
WPS-1	西太平洋海山区	159.49°E	22.28°N	4 132	球状结核
WPS-2	西太平洋海山区	153.88°E	18.70°N	5 706	球状结核
CCWP-1	东太平洋CC区	155.37°W	9.72°N	5 313	连生体状结核
CCWC-2	东太平洋CC区	155.00°W	10.57°N	5 159	菜花状结核
CCEC-1	东太平洋CC区	141.99°W	11.42°N	5 114	菜花状结核
CCEC-2	东太平洋CC区	121.05°W	15.18°N	4 073	菜花状结核

样品编号	采样区域	经度	纬度	水深/m	形态特征
WPS-1	西太平洋海山区	159.49°E	22.28°N	4 132	球状结核
WPS-2	西太平洋海山区	153.88°E	18.70°N	5 706	球状结核
CCWP-1	东太平洋CC区	155.37°W	9.72°N	5 313	连生体状结核
CCWC-2	东太平洋CC区	155.00°W	10.57°N	5 159	菜花状结核
CCEC-1	东太平洋CC区	141.99°W	11.42°N	5 114	菜花状结核
CCEC-2	东太平洋CC区	121.05°W	15.18°N	4 073	菜花状结核

元素	WPS-1	WPS-2	CCWP-1	CCWC-2	CCEC-1	CCEC-2
SiO₂/%	15.79	16.53	15.66	13.86	14.13	14.68
TiO₂/%	2.25	2.46	1.38	0.67	0.59	0.49
Al₂O₃/%	3.96	5.65	5.43	5.26	5.15	4.70
Fe₂O₃/%	24.74	26.36	16.39	8.88	7.44	9.17
MnO/%	26.95	24.17	31.22	37.68	38.25	37.32
MgO/%	2.11	2.04	2.93	3.81	3.74	3.19
CaO/%	2.87	2.48	2.51	2.48	2.38	2.32
Na₂O/%	2.24	2.30	2.60	2.67	2.83	2.76
K₂O/%	0.87	0.93	1.09	1.05	1.05	1.13
P₂O₅/%	0.76	0.67	0.55	0.51	0.51	0.42
SO₃/%	0.32	0.29	0.21	0.15	0.14	0.20
烧失量/%	23.12	22.09	21.95	19.99	20.00	19.78
全岩分析元素总和/%	106	106	102	97	96	96
Co/10^-6	3 691	2 711	2 462	2 030	1 986	1 854
Ni/10^-6	3 620	2 020	8 248	12 246	13 948	12 364
Cu/10^-6	1 895	1 702	6 055	10 090	12 362	9 146
Zn/10^-6	579	429	796	1 483	1 277	1 611
Rb/10^-6	18.36	13.73	17.61	19.67	20.09	25.96
Sr/10^-6	1 124	966	811	587	562	677.53
Zr/10^-6	651	587	534	280	301	304
Nb/10^-6	9.84	8.65	30.81	16.11	27.06	19.64
Ta/10^-6	0.06	0.11	0.23	0.11	0.26	0.26
Ba/10^-6	1 415	1 304	1 275	1 441	2 109	3 382
Ce/10^-6	1 365	1 038	596	226	245	267
Nd/10^-6	232	161	188	111	117	126
Pb/10^-6	1 114	672	651	341	371	396
REY/10^-6	2 296	1 723	1 322	681	691	735

元素	WPS-1	WPS-2	CCWP-1	CCWC-2	CCEC-1	CCEC-2
SiO₂/%	15.79	16.53	15.66	13.86	14.13	14.68
TiO₂/%	2.25	2.46	1.38	0.67	0.59	0.49
Al₂O₃/%	3.96	5.65	5.43	5.26	5.15	4.70
Fe₂O₃/%	24.74	26.36	16.39	8.88	7.44	9.17
MnO/%	26.95	24.17	31.22	37.68	38.25	37.32
MgO/%	2.11	2.04	2.93	3.81	3.74	3.19
CaO/%	2.87	2.48	2.51	2.48	2.38	2.32
Na₂O/%	2.24	2.30	2.60	2.67	2.83	2.76
K₂O/%	0.87	0.93	1.09	1.05	1.05	1.13
P₂O₅/%	0.76	0.67	0.55	0.51	0.51	0.42
SO₃/%	0.32	0.29	0.21	0.15	0.14	0.20
烧失量/%	23.12	22.09	21.95	19.99	20.00	19.78
全岩分析元素总和/%	106	106	102	97	96	96
Co/10^-6	3 691	2 711	2 462	2 030	1 986	1 854
Ni/10^-6	3 620	2 020	8 248	12 246	13 948	12 364
Cu/10^-6	1 895	1 702	6 055	10 090	12 362	9 146
Zn/10^-6	579	429	796	1 483	1 277	1 611
Rb/10^-6	18.36	13.73	17.61	19.67	20.09	25.96
Sr/10^-6	1 124	966	811	587	562	677.53
Zr/10^-6	651	587	534	280	301	304
Nb/10^-6	9.84	8.65	30.81	16.11	27.06	19.64
Ta/10^-6	0.06	0.11	0.23	0.11	0.26	0.26
Ba/10^-6	1 415	1 304	1 275	1 441	2 109	3 382
Ce/10^-6	1 365	1 038	596	226	245	267
Nd/10^-6	232	161	188	111	117	126
Pb/10^-6	1 114	672	651	341	371	396
REY/10^-6	2 296	1 723	1 322	681	691	735