Postmasburg Mn Field

Location - South Africa

Age (of protore) - 2100 Ma

Original size - 10.0 million tonnes of Mn

References

Gutzmer, J., and Beukes, N. J., 1997, Mineralogy and mineral chemistry of oxide-facies manganese ores of the Postmasburg manganese field, South Africa: Mineralogical Magazine, v. 61, p. 213-232.

Gutzmer, J., and Beukes, N.J., 1996, Karst-hosted fresh-water Paleoproterozoic manganese deposits, Postmasburg, South Africa: Economic Geology, v. 91, p. 1435-1454.

von Plehwe-Leisen, E., and Klemm, D.D., 1995, Geology and ore genesis of the manganese ore deposits of the Postmasburg manganese-field, South Africa: Mineralium Deposita, v. 30, p. 257-267.

Major Elements (% oxide)
		%	%	%	%	%	%	%	%	%	%	%
		MnO	Fe₂O_3tot	SiO₂	Al₂O₃	CaO	MgO	K₂O	Na₂O	TiO₂	P₂O₅	LOI
average	oxide	59.51	17.02	2.93	10.02	0.38	0.61	0.67	0.32	0.25	0.06	7.23
PAL216		91.2	1.33	2.77	11.7	0.53	0.85	0.31	0.11	0.3	0.04	7.4
PAL217		87.8	5.46	5.51	16.1	0.54	1.38	0.12	0.05	0.15	0.08	7.8
PAL220		85.2	6.33	2.11	3.02	0.55	0.26	0.49	0.10	0.16	0.1	6.0
PAL221		81.9	9.01	2.96	10.5	0.80	0.41	0.82	0.08	0.24	0.06	9.1
GLO186		81.6	11.08	1.52	9.87	0.20	0.94	0.83	0.01	0.54	0.02	10.7
GLO187		78.5	12.97	6.35	12.7	0.17	0.35	0.76	2.35	0.42	0.02	7.2
LOH179		78.5	12.17	2.63	4.34	0.80	0.27	1.08	0.13	0.14	0.09	7.5
BIS245		78.1	11.72	0.35	3.32	0.15	0.24	2.55	0.11	0.32	0.01	8.7
BIS246		76.4	6.38	3.62	18.5	0.04	0.87	0.44	1.20	0.23	0.001	6.6
GLO185		72.4	11.55	2.50	14.1	0.61	0.28	0.37	0.17	0.22	0.05	6.5
GLO197		71.1	13.90	4.01	6.09	0.68	1.87	0.78	0.11	0.31	0.04	8.4
LOH178		68.8	24.59	2.55	5.75	0.14	0.16	0.60	0.66	0.08	0.09	5.7
LOH180		67.7	13.65	0.71	4.42	0.13	0.22	0.77	0.00	0.11	0.04	6.3
BIS241		66.5	12.73	2.14	29.6	0.00	1.19	0.06	0.00	0.38	0.001	7.4
BIS248		65.5	12.05	3.07	5.81	0.22	0.25	0.11	0.01	0.23	0.36	5.3
BIS250		63.9	13.77	4.00	4.44	0.47	0.15	0.65	0.04	0.15	0.02	5.1

Trace elements
	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm
	As	Ba	Cd	Co	Cr	Cu	Mo	Nb	Ni	Pb	Rb	Sc	Sr	Th	U	V	Y	Zn	Zr
average	na	12306	na	111	148	150	na	na	213	441	na	na	na	8	na	124	na	98	68
PAL216		8600		84	206	28			259	352				9		94		177	48
PAL217		10600		141	116	167			214	102				0.05		164		180	29
PAL220		30500		36	93	69			36	326				8		79		43	23
PAL221		700		199	118	55			199	28				1		58		103	156
GLO186		25100		158	174	2			253	1249				24		66		70	33
GLO187		6900		69	117	14			239	538				11		314		36	76
LOH179		19400		37	116	73			213	2				1		413		29	38
BIS245		48600		42	57	2			64	4212				72		83		64	56
BIS246		4200		226	189	159			375	9				0.05		64		16	232
GLO185		6900		69	156	85			125	31				2		111		47	71
GLO197		5800		14	132	13			49	5				0.05		56		33	108
LOH178		14000		285	164	1451			566	4				3		248		703	109
LOH180		1400		52	179	105			84	52				0.05		141		14	38
BIS241		1700		149	212	45			345	22				1		22		42	47
BIS248		9100		157	178	23			344	88				1		12		4	7
BIS250		3400		59	157	106			41	33				0.05		63		5	16

na = not analyzed; bd = below detection

Rare-earth elements

not reported