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Eagle Star Minerals Identifies a High Grade Phosphate Zone Associated With
Rare Earth Element (REE) Mineralization at Samba, Piaui, Brazil
Click Here for a Free Real-time Stock Quote on TSX-V: EGE
VANCOUVER, BRITISH COLUMBIA--(June 14, 2012) - Eagle Star Minerals Corp. (TSX VENTURE:EGE) (PINKSHEETS:ELGSF) (FRANKFURT:E6R) ("Eagle Star" or "the Company") is pleased to announce the identification of an area within the Samba Project that combines high grade phosphate with Rare Earth Element (REE) mineralization.
To date, the follow up sampling program at Samba helped define three areas (Samba North, Samba West and Samba South) of high potential.
The newly discovered high grade phosphate and REE zone is located within the Samba North area where a thorough analysis of the best P2O5 results (up to 26%) revealed a combined mineralization with total REE of up to 0.5%, a grade which is considered to be excellent in world class Paleoplacer REE deposits.
To view Samba concessions map please click on the following link:
GEOLOGY AND RESULTS SAMBA NORTH
The topographic pattern of the Samba North area is characterized by an elongated, north-east oriented ridge that reaches up to 250 m in elevation and has approximate dimensions of 7km by 1.5km. The excellent results obtained to date are located in the northern limit of the ridge and therefore the mineralization is open laterally along the ridge.
The rock types mapped are the purple siltstone, phosphorite layers (locally brecciated) and sandstones. The field evidence suggests a repetitive intercalation of the siltstone and sandstone, which seem to vary in thickness from 10 to 20 meters. The phosphorite layers occur within the siltstone packages and host high-grade phosphate and REE mineralization. The phosphorite layers reach up to 40cm in thickness and are found on three different topographic levels suggesting a repetitive nature. The brecciated type is probably related to lineaments (faults). Highlights of the chip sample results from the Samba North area are shown below:
Point ID
AAO05
AAO06
AAO08
Sample ID
80309
80310
80313
Elev
289
274
259
Sample Type
CHIP
CHIP
CHIP
Rock Code
FOS/AREN
FOS
FOS
P2O5 %
14.32
26.34
21.10
SiO2 %
21.70
8.70
19.40
Al2O3 %
7.49
3.46
7.58
Fe2O3 %
28.20
18.90
16.10
CaO %
16.9
34.2
26.6
MgO %
1.06
0.36
0.85
TiO2 %
0.57
0.42
0.46
Na2O %
0.22
0.53
0.48
K2O %
1.01
0.81
1.18
MnO %
0.17
0.15
0.03
TREO%
0.47
0.44
0.47
HREO%
45%
50%
46%
Ce2O3 ppm
1132
957
1121
Dy2O3 ppm
259
222
223
Er2O3 ppm
109
128
140
Eu2O3 ppm
53
41
36
Gd2O3 ppm
235
199
187
Ho2O3 ppm
43
43
43
La2O3 ppm
358
313
448
Lu2O3 ppm
8
14
16
Nd2O3 ppm
757
637
670
Pr2O3 ppm
141
117
137
Sm2O3 ppm
212
176
160
Tb2O3 ppm
39
32
31
Tm2O3 ppm
12
16
18
Y2O3 ppm
1274
1399
1323
Yb2O3 ppm
70
106
129
TREO - Total Rare Earth Oxides as %
HREO - Heavy Rare Earth Elements and % of TREO
LREEs
Light REEs
HREES
Heavy REEs
*Although collected to be representative of the sampled unit, due to the nature of regional rock sampling they do not form specific widths and should be considered grab samples. Consequently, they may be to some degree selective and may not be representative of mineralized units.
The bordering area of the Samba North ridge is a siltstone with P2O5 grades of up to 5% (based on channel samples of 1 meter taken at surface from outcrops). The area is relatively flat and the mineralization is open to depth. The best channel sample results to date are listed below (REE results are pending):
*All channel samples are taken from outcropping material
POINT
ID
SAMPLE
ID
ELEV.
SAMPLE
TYPE
SAMPLE
WIDTH
(m)
ROCK
CODE
P2O5
(%)
SiO2
(%)
Al2O3
(%)
Fe2O3
(%)
CaO
(%)
K2O
(%)
SND07
51153
284
CHANNEL
0.80
SLT
4.97
58.30
11.40
6.76
7.31
3.48
SND07
51154
285
CHANNEL
1.00
SLT
5.24
59.00
8.44
12.10
7.19
2.53
SNG01
51015
326
CHANNEL
0.70
SLT_B
3.29
55.30
9.80
16.10
5.28
4.13
SBF-01
80116
212
CHANNEL
0.50
SLT_R
3.93
49.40
16.30
10.8
6.06
4.54
FDT-01A
80021
159
CHANNEL
1.20
SLT_C
2.72
47.80
17.80
11.40
4.30
5.85
STA03A
80045
196
CHANNEL
0.90
SLT_R
5.11
56.70
11.60
8.97
6.97
3.41
FURTHER WORK AT SAMBA NORTH
Detailed mapping will be conducted at the Samba North area to define the stratigraphic sequence, estimate the thickness of each rock type package and map the phosphorite layers. Additional sampling of the phosphorite layers and of the sandstone will be carried out to verify the solubility of the phosphate. Description of thin sections will define the phosphate and REE mineral bearing phases (Xenotime, Britholite, Monazite).
A total of 28 pulps were selected to run REE analysis (results are pending). The samples were chosen based on the rock type and the geochemical parameters shown in the table below:
Element
Lowest
Highest
Average
Th(ppm)
20
641
173
Y (ppm)
40
1001
249
U (ppm)
21
452
179
P2O5 (%)
1.2
17.8
5
La (ppm)
30
181
64
Li (ppm)
10
79
24
SAMBA SOUTH AND SAMBA WEST AREAS
The Samba South area is dominated by grey and purple siltstone rock types. Chip samples taken to date returned grades of up to 4.8% P2O5 (REE results are pending).
The Samba West area is dominated by the