风成砂覆盖区地电化学提取前后土壤中元素赋存状态变化研究

doi:10.11720/wtyht.2018.1308

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Abstract

In this study, soil samples before and after geo-electrochemical extraction were collected along the fifth exploration line of the Luokedun lead-zinc polymetallic mining area. Total content and chemical speciation of 'seven steps method' were analyzed for 20 elements. Some conclusions have been reached: Elements extracted by geo-electrochemical process exist in a variety of phases in soil. The active phases including water soluble, exchangeable and carbonate bound phases are the mainly components, while micro-particles that exist in low active phases including residues can also be migrated and adsorbed by this process. Spatial distribution of element values of some active phases in soil appear to be highly consistent with spatial position of the orebody after geo-electrochemical extraction. Factors such as low depth transported overburden and orebody or mineralized body beneath the cover can lead to a significant increase of total content in soil for the majority of metal elements after the extraction process. Such phenomena indicate that the method of geo-electrochemistry has great applicability in the transported overburden area.

Key words： geo-electrochemisty (CHIM) modes of occurrence of elements eolian sand sequential extraction Luokedun polymetallic ore deposit

Received: 06 July 2017 Published: 04 June 2018

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	Articles by authors
	Bin-Bin SUN
	Dao-Ming ZENG
	Zhan-Yuan LIU
	Guo-Hua ZHOU
	Ling HE

Cite this article:

Bin-Bin SUN,Dao-Ming ZENG,Zhan-Yuan LIU, et al. Variation of modes of occurrence of elements in soil before and after the geo-electrochemical extraction in eolian sand covered area[J]. Geophysical and Geochemical Exploration, 2018, 42(3): 518-527.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2018.1308 OR https://www.wutanyuhuatan.com/EN/Y2018/V42/I3/518

元素相态		Au	Ag	As	Bi	Cd	Co	Cr	Cu	La	Mo	Ni	Pb	Sb	Se	Ti	U	Zn	Al	Fe	K
水溶态	前	0.063	0.274	0.195	0.304	1.59	0.006	0.186	0.043	0.005	6.83	0.079	0.074	1.94	0.008	0.370	6.77	0.052	8.88	29.3	8.05
	后	0.077	0.507	0.131	0.472	2.07	0.006	0.196	0.055	0.004	6.70	0.038	0.095	3.09	0.008	0.312	4.76	0.127	9.35	31.8	8.65
	比	1.23	1.85	0.67	1.55	1.30	1.04	1.05	1.28	0.80	0.98	0.48	1.28	1.59	1.01	0.84	0.70	2.43	1.05	1.09	1.07
离子交换态	前	0.080	0.758	0.073	0.434	5.21	0.116	0.264	0.101	0.011	11.0	0.145	0.040	1.30	0.005	0.215	7.68	0.196	10.7	4.89	95.0
	后	0.039	1.08	0.054	0.429	6.53	0.163	0.378	0.170	0.011	17.3	0.222	0.044	2.91	0.004	0.270	12.7	0.219	20.2	12.3	119
	比	0.49	1.43	0.74	0.99	1.26	1.41	1.43	1.68	0.93	1.57	1.54	1.12	2.24	0.87	1.25	1.66	1.11	1.89	2.51	1.26
碳酸盐结合态	前	0.067	0.378	0.057	2.28	8.82	0.036	0.607	0.168	0.383	12.6	0.272	0.339	3.32	0.003	0.528	18.2	10.0	12.9	42.5	244
	后	0.073	0.434	0.042	2.95	13.9	0.048	0.752	0.214	0.579	13.8	0.377	0.465	4.50	0.002	0.793	28.5	6.97	19.4	10.5	278
	比	1.10	1.15	0.75	1.29	1.58	1.35	1.24	1.27	1.51	1.09	1.39	1.37	1.35	0.70	1.50	1.56	0.69	1.50	0.25	1.14
腐殖酸结合态	前	0.206	0.654	0.127	6.03	7.33	0.623	0.285	0.619	2.30	37.5	0.546	0.78	15.2	0.003	50.4	42.3	3.72	220	206	67.4
	后	0.193	1.05	0.131	7.51	10.6	0.745	0.228	1.10	2.79	25.7	0.744	1.1	22.2	0.013	54.4	52.8	5.89	220	202	67.0
	比	0.94	1.61	1.03	1.25	1.44	1.20	0.80	1.78	1.21	0.68	1.36	1.42	1.46	4.18	1.08	1.25	1.58	1.00	0.98	1.00
铁锰氧化物结合态	前	0.120	8.28	0.339	6.11	7.30	1.21	1.21	0.500	1.63	5.04	2.21	2.25	3.93	0.012	6.46	20.6	2.00	1342	573	164
	后	0.082	13.3	0.291	8.56	12.0	1.58	1.39	0.715	2.09	11.4	2.99	3.33	5.20	0.011	7.63	35.6	3.13	1497	682	183
	比	0.68	1.60	0.86	1.40	1.65	1.30	1.15	1.43	1.28	2.27	1.35	1.48	1.32	0.89	1.18	1.73	1.56	1.11	1.19	1.12
强有机结合态	前	0.467	4.00	0.074	11.9	3.79	0.488	2.27	0.690	0.601	38.1	1.48	1.15	13.7	0.023	40.7	34.4	1.40	966	530	183
	后	0.391	6.74	0.053	17.5	5.01	0.561	2.25	0.819	0.725	36.9	1.66	1.36	11.9	0.021	40.8	38.2	2.10	926	457	176
	比	0.84	1.69	0.72	1.47	1.32	1.15	0.99	1.19	1.21	0.97	1.12	1.18	0.87	0.89	1.00	1.11	1.50	0.96	0.86	0.96
残渣态	前	10.4	48.2	6.49	145	42.1	2.37	21.7	6.71	11.7	269	6.42	13.5	443	0.052	2235	920	14.5	47096	12664	20426
	后	9.27	61.7	7.33	181	48.9	2.58	21.7	7.81	12.5	328	7.08	15.1	509	0.061	2282	1026	19.4	45855	12720	20382
	比	0.89	1.28	1.13	1.25	1.16	1.09	1.00	1.17	1.07	1.22	1.10	1.12	1.15	1.17	1.02	1.12	1.34	0.97	1.00	1.00

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