OREAS 134b

Specs

• CRM State: primary
• Matrix: carbonate siltstone
• Mineralisation: SEDEX

CRM Group

• Zn-Pb-Ag sulphide ore

Price

• 10g = $4.25

OREAS 134b Certificate.pdf
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OREAS 134b is one of 8 pigeon paired CRM's prepared from zinc-lead mineralised material from Xstrata's Black Star and George Fisher orebodies, Mt Isa, NW Queensland, Australia. The orebodies are sediment hosted 'SEDEX' Zn-Pb-Ag deposits located within the Urquart Shale Formation of the Mount Isa Group, a weakly metamorphosed, 5 km thick sequence composed predominantly of Mesoproterozoic carbonate siltstones, mudstones and shales. The Urquart Shale consists of a sequence of alternating pyrite-rich dolomitic siltstone and shale beds up to 1000 metres thick and was deposited in a lacustrine setting within an intracratonic rift basin. The orebodies lie within the upper 650m and are bounded by the Mount Isa fault on the west and by volcanic greenstones to the east. Comprising galena and sphalerite with pyrite and pyrrhotite, the lead-zinc-silver orebodies are concordant with carbonaceous dolomitic sediments and interfinger with the silica-dolomitic mass hosting copper. The CRM OREAS 134b was prepared from a blend of Black Star waste rock, Black Star ore and George Fisher ore.

Constituent	Certified Value	1SD	95% Confidence Low	95% Confidence High	Method
Co, Cobalt (ppm)	104	15	92	116	Borate / Peroxide Fusion ICP
Co, Cobalt (ppm)	106	6	103	110	Aqua Regia Digestion
Co, Cobalt (ppm)	107	8	103	112	4-Acid Digestion
Sb, Antimony (ppm)	111	13	93	129	Borate / Peroxide Fusion ICP
Sb, Antimony (ppm)	124	8	120	129	4-Acid Digestion
Ag, Silver (ppm)	204	14	196	213	Aqua Regia Digestion
Ag, Silver (ppm)	209	9	204	213	4-Acid Digestion
As, Arsenic (ppm)	221	16	213	230	Aqua Regia Digestion
As, Arsenic (ppm)	224	24	201	248	Borate / Peroxide Fusion ICP
As, Arsenic (ppm)	228	21	218	238	4-Acid Digestion
Cd, Cadmium (ppm)	561	34	540	581	4-Acid Digestion
Cd, Cadmium (ppm)	563	36	542	585	Aqua Regia Digestion
Cd, Cadmium (ppm)	569	25	548	590	Borate / Peroxide Fusion ICP
Cu, Copper (ppm)	1337	73	1284	1391	Borate / Peroxide Fusion ICP
Cu, Copper (ppm)	1348	50	1325	1370	4-Acid Digestion
Cu, Copper (ppm)	1363	64	1330	1397	Aqua Regia Digestion
Ba, Barium (ppm)	1490	142	1337	1644	Borate / Peroxide Fusion ICP
Al2O3, Aluminium(III) oxide (wt.%)	0.712	0.077	0.661	0.764	Aqua Regia Digestion
Al2O3, Aluminium(III) oxide (wt.%)	2.21	0.092	2.15	2.26	4-Acid Digestion
Al2O3, Aluminium(III) oxide (wt.%)	2.24	0.094	2.16	2.31	Borate / Peroxide Fusion ICP
MgO, Magnesium oxide (wt.%)	3.33	0.281	3.17	3.49	4-Acid Digestion
MgO, Magnesium oxide (wt.%)	3.45	0.174	3.33	3.58	Borate / Peroxide Fusion ICP
CaO, Calcium oxide (wt.%)	5.94	0.291	5.73	6.15	Aqua Regia Digestion
CaO, Calcium oxide (wt.%)	5.98	0.343	5.77	6.19	4-Acid Digestion
CaO, Calcium oxide (wt.%)	6.18	0.206	6.08	6.28	Borate / Peroxide Fusion ICP
Fe, Iron (wt.%)	12.25	0.929	11.71	12.80	Aqua Regia Digestion
Fe, Iron (wt.%)	12.37	0.623	12.06	12.68	4-Acid Digestion
Fe, Iron (wt.%)	12.69	0.575	12.22	13.15	Borate / Peroxide Fusion ICP
SiO2, Silicon dioxide (wt.%)	12.98	0.837	12.33	13.63	Borate / Peroxide Fusion ICP
Pb, Lead (wt.%)	13.31	0.663	12.85	13.78	Aqua Regia Digestion
Pb, Lead (wt.%)	13.36	0.743	12.91	13.80	4-Acid Digestion
Zn, Zinc (wt.%)	17.70	1.001	17.04	18.36	Aqua Regia Digestion
Zn, Zinc (wt.%)	18.03	0.755	17.58	18.48	4-Acid Digestion
Zn, Zinc (wt.%)	18.12	0.473	17.79	18.45	Borate / Peroxide Fusion ICP
S, Sulphur (wt.%)	19.31	1.505	18.05	20.56	Aqua Regia Digestion
S, Sulphur (wt.%)	19.59	0.797	19.03	20.16	Infrared Combustion
S, Sulphur (wt.%)	19.68	1.092	18.75	20.62	4-Acid Digestion
S, Sulphur (wt.%)	20.74	1.250	19.44	22.04	Borate / Peroxide Fusion ICP