TH - Geology | Matamec Explorations, Inc.

TH - Geology

Samples collected during the 2010 campaign underscore the significant enrichment of this showing. Traverses outside the main 2008 showing area also led to the discovery of two new sub-outcropping areas enriched in rare earths-yttrium-zirconium, adding more than 300m to the showing’s north-east extension.

Table 1. Grab samples from the Falaises A1, Medium Falaises, Couleuvre and Coin showings in %
Showing		Falaises A1	Medium Falaises	Coul- euvre	Coul- euvre	Coul- euvre	Coul- euvre	Coin	Coin
Grab sample		AN-1	RA-25	COU-4	COU-9	RA-21	RA-22	RA-31A	RA-31B
Nature		Frost-heaved	Outcrop	Boulder	Boulder	Boulder	Boulder	Frost-heaved	Frost-heaved
La2O3	Lanthanum	0.198	0.400	0.574	2.281	3.813	1.233	0.215	0.238
Ce2O3	Cerium	0.341	1.172	1.094	6.044	6.142	2.653	0.571	0.652
Pr2O3	Praseodymium	0.034	0.137	0.101	5.852	5.852	0.279	0.068	0.077
Nd2O3	Neodymium	0.102	0.413	0.315	2.706	3.359	0.832	0.232	0.276
LREO*	Light rare earths	0.675	2.121	2.084	16.883	19.166	4.997	1.086	1.244
Sm2O3	Samarium	0.018	0.057	0.051	0.511	5.798	0.158	0.041	0.053
Eu2O3	Europium	0.002	0.005	0.006	0.048	0.061	0.015	0.004	0.004
Gd2O3	Gadolinium	0.019	0.046	0.053	0.491	5.763	0.149	0.036	0.040
MREO*	Medium rare earths	0.039	0.108	0.111	1.050	11.623	0.322	0.081	0.098
Tb2O3	Terbium	0.003	0.004	0.007	0.063	0.083	0.018	0.004	0.005
Dy2O3	Dysprosium	0.015	0.017	0.033	0.399	0.547	0.095	0.019	0.023
Ho2O3	Holmium	0.003	0.003	0.006	0.070	0.100	0.020	0.004	0.005
Er2O3	Erbium	0.009	0.007	0.015	0.212	0.321	0.054	0.013	0.016
Tm2O3	Thulium	0.001	0.001	0.002	0.025	0.040	0.008	0.002	0.003
Yb2O3	Ytterbium	0.007	0.004	0.007	0.109	0.200	0.038	0.015	0.021
Lu2O3	Lutetium	0.001	0.000	0.001	0.013	0.022	0.005	0.003	0.004
HREO*	Heavy rare earths	0.040	0.036	0.071	0.889	1.314	0.237	0.060	0.078
Y2O3	Yttrium	0.111	0.082	0.168	1.626	2.451	0.464	0.117	0.157
HREO + Y2O3		0.151	0.118	0.238	2.515	3.765	0.701	0.177	0.236
HREO + Y2O3 / TREO	%	17	5	10	12	11	12	13	15
TREO*	Total rare earths	0.865	2.348	2.433	20.448	34.553	6.019	1.344	1.578
ZrO2	Zirconium	0.119	0.320	0.023	0.041	0.045	0.066	4.975	9.696
* LREO: Light rare earths in oxides = La2O3 to Nd2O3. MREO: Medium rare earths in oxides = Sm2O3 to Gd2O3. HREO: Heavy rare earths in oxides = Tb2O3 to Lu2O3. ***TREO: Total Rare Earth Oxides = LREO + MREO + HREO + Y2O3.
Sub-divisions used by Roskill Information Services Ltd. and Industrial Minerals Company of Australia Pty Ltd.

The 2010 campaign also included mechanical stripping of the main TH outcrops and collection of 50 meters of channel samples.

The table below lists the best channel samples obtained in 2010, with a maximum of 1.19% TREO, 26% HeavyREO+ Y₂O₃/TREO and 1.18% ZrO₂ over 1.9 meterS. This showing is considered open laterally and at depth.

Table 2. Best channel sampling intervals of the TH showing, in %
Sampling interval #		19-20	37, 38, 21-30	40-41	45-46	54-55	58-59
Length (m)		4.3	9.8	2.1	1.5	2.0	1.9
La₂O₃	Lanthanum	0.041	0.052	0.025	0.134	0.041	0.151
Ce₂O₃	Cerium	0.105	0.125	0.064	0.387	0.099	0.389
Pr₂O₃	Praseodymium	0.013	0.015	0.008	0.051	0.013	0.048
Nd₂O₃	Neodymium	0.055	0.062	0.035	0.209	0.053	0.193
LREO*	Light rare earths	0.214	0.254	0.131	0.782	0.206	0.781
Sm₂O₃	Samarium	0.016	0.016	0.010	0.051	0.016	0.047
Eu₂O₃	Europium	0.002	0.002	0.002	0.006	0.002	0.006
Gd₂O₃	Gadolinium	0.019	0.018	0.012	0.053	0.019	0.046
MREO*	Medium rare earths	0.038	0.035	0.024	0.110	0.037	0.099
Tb₂O₃	Terbium	0.004	0.003	0.003	0.009	0.004	0.008
Dy₂O₃	Dysprosium	0.024	0.022	0.018	0.055	0.026	0.044
Ho₂O₃	Holmium	0.005	0.005	0.004	0.011	0.006	0.008
Er₂O₃	Erbium	0.013	0.014	0.012	0.028	0.016	0.022
Tm₂O₃	Thulium	0.002	0.002	0.002	0.004	0.002	0.003
Yb₂O₃	Ytterbium	0.009	0.010	0.008	0.019	0.012	0.015
Lu₂O₃	Lutetium	0.001	0.001	0.001	0.002	0.001	0.002
HREO*	Heavy rare earths	0.057	0.056	0.048	0.128	0.068	0.103
Y₂O₃	Yttrium	0.133	0.130	0.116	0.279	0.180	0.212
HREO + Y₂O₃		0.191	0.186	0.164	0.407	0.248	0.315
HREO + Y₂O₃ /TREO	%	43	39	51	31	50	26
TREO*	Total rare earths	0.442	0.476	0.319	1.299	0.491	1.194
ZrO₂	Zirconium	0.355	0.743	0.529	0.717	0.784	1.180
* LREO: Light rare earths in oxides = La₂O₃ to Nd₂O₃. MREO: Medium rare earths in oxides = Sm₂O₃ to Gd₂O_3. HREO: Heavy rare earths in oxides = Tb₂O₃ to Lu₂O₃. TREO: Total Rare Earth Oxides = LREO + MREO + HREO + Y₂O₃
N.B.: Sub-divisions used by Roskill Information Services Ltd. and Industrial Minerals Company of Australia Pty Ltd.

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