Mr. Mark Brown reports
RARE ELEMENT DISCOVERS HEAVY RARE EARTHS AT WHITETAIL RIDGE, EAST TAYLOR AND CARBON AND HIGH GRADE AT EAST TAYLOR WITHIN THE BEAR LODGE PROJECT
Rare Element Resources Ltd. has identified high grades of heavy rare earth elements in the Whitetail Ridge resource area and the East Taylor and
Carbon target areas and discovered high-grade REE mineralization
at the East Taylor target at the Bear Lodge project. All
three of the mineralized zones are located in the western half of an
expanding rare-earth-mineralized district (the Bear Lodge REE
district). The western areas are characterized by high grades (3 per cent rare earth oxides)
and substantial quantities of the light rare earths, along with
some of the highest grades of heavy rare earths in North American
deposits. They are particularly enriched in europium, terbium,
dysprosium and gadolinium. The East Taylor and
Carbon targets also contain significant yttrium.
"We are very pleased with the recognition of substantial grades of heavy
rare earths, in addition to the known high grades of light rare earths,
in the western part of the Bear Lodge rare earth district," said Dr.
Don Ranta, president of Rare Element. "Seven drill holes supported by
surface geology in three target areas provide encouragement that we
will be able to define significant tonnages of this mineralization with
further drilling. Discovery of high-grade REE at East Taylor is a major
step forward in expanding the potential size of the district. The
higher HREE values and projected increased demand for select light and
heavy REE could have strongly positive economic benefits to the Bear
Lodge project. These deposits may represent a superior source of the
most valuable rare earths, which include neodymium, praseodymium,
europium, terbium and dysprosium," he said.
Rare Element is
considering a variety of alliances in the advancement of its
rare earths project.
Bear Lodge rare earth district; zonation of light and heavy REE
Discoveries of high-grade REE mineralization at Whitetail Ridge, East
Taylor and Carbon expand the area of known REE mineralization well
outside of the Bull Hill deposits and identify a district underlain
by significant and potentially economic REE mineralization. The data
indicate that the Bear Lodge REE district covers a crudely elliptical
area that extends approximately 5,740 feet (1,750 metres) northwest-southeast
by 4,260 feet (1,300 m) northeast-southwest. The Whitetail
Ridge resource area and Carbon target are located northwest of the Bull
Hill REE deposits, and the East Taylor target is located west of the
Bull Hill deposits. Based on a re-evaluation of assay data for the
Whitetail Ridge and Carbon areas during the company's most recent
resource estimation (news release dated June 14, 2011) and newly
received REE assay data from the East Taylor target area, assay grades
for individual rare earth elements between deposits and target areas at
the Bear Lodge project suggest a zonation of REE distribution in the
district. The mineralization at Whitetail Ridge, East Taylor and
Carbon has a distribution characterized by elevated abundances of HREE
relative to the mineralization at Bull Hill. The three western
mineralized zones are characterized by high grades and substantial
quantities of the light rare earths, as well as some of the
highest grades of heavy rare earths in North American deposits. They
are particularly enriched in europium, terbium, dysprosium and
gadolinium, as shown in the attached comparison of REO grades table. The mineralized
intervals in SUN-090 were submitted for REE analyses earlier this year,
and the assay results are reported for the first time in this news
release. Total REO assays for drill hole SUN-079 were reported earlier
this year in a news release dated April 6, 2011. LREE generally include
cerium, lanthanum, neodymium, praseodymium and samarium; HREE include europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium,
lutetium and yttrium.
These new discoveries indicate good potential for new deposits of
high-grade rare earth elements in the western half of the Bear Lodge
REE project, and those deposits appear particularly enriched in the
heavy rare earths. A grade comparison of individual rare earth elements
between the Bull Hill resource, the Whitetail Ridge resource, and drill
holes at the East Taylor and Carbon target areas is given in the attached comparison of REO grades table.
COMPARISON OF REO GRADES AT BULL HILL, WHITETAIL RIDGE, EAST TAYLOR AND CARBON
Area Bull Hill Whitetail Ridge East Taylor
Resource Indicated Inferred Exploration/SUN-090
La2O3 1.08 0.81 1.23
Ce2O3 1.64 1.19 1.98
Pr2O3 0.186 0.158 0.264
Nd2O3 0.65 0.64 0.894
Sm2O3 0.099 0.142 0.191
Eu2O3 0.021 0.042 0.056
Gd2O3 0.048 0.103 0.173
Tb2O3 0.0037 0.0115 0.026
Dy2O3 0.0104 0.0361 0.092
Y2O3 0.032 0.087 0.319
Eu+Tb+Dy 0.0351 0.090 0.174
Nd+Pr+Eu+Tb+Dy 0.871 0.888 1.332
Grade (% REO) 3.77 3.24 5.61
Metric tonnes 4.45 1.5
Area Carbon
Resource Exploration/SUN-079
La2O3 0.96
Ce2O3 1.89
Pr2O3 0.23
Nd2O3 0.91
Sm2O3 0.165
Eu2O3 0.040
Gd2O3 0.097
Tb2O3 0.013
Dy2O3 0.062
Y2O3 0.283
Eu+Tb+Dy 0.115
Nd+Pr+Eu+Tb+Dy 1.255
Grade (% REO) 4.69
Identification of high-grade HREEs at the Whitetail Ridge deposit
The identification of significant HREE mineralization at the Whitetail
Ridge resource area is the result of a detailed evaluation of assay
data during the most recent resource estimation work (news release
dated June 14, 2011). This recognition triggered a review of all the
REE mineralized drill holes in the general western area. The Whitetail
Ridge deposit is located approximately 1,500 feet (450 m) northwest of
the main Bull Hill rare earth deposit. The area was
identified previously as an exceptional REE mineralization target (news
release dated Oct. 13, 2009), based on factors, including: 1) the
intersection of REE mineralization as FMR (FeOx-MnOx-REE; designated as
MnOx veins) dikes and veins in five nearby historical drill
holes; 2) detailed geological mapping of FMR vein material in historical
exploration trenches; and 3) a broad positive ground
geophysical anomaly of a type coincident with significant REE
mineralization in other parts of the project area. The size of the
geophysical anomaly (approximately 1,400 by 2,000 feet, 400 by 610 m,
elongate northeasterly) provides an indication that this REE target may
be larger than others in the district. Detailed mapping suggests that
the REE mineralization consists of northwest-striking FMR dikes and an
FMR stockwork zone that is elongate northeasterly, with dimensions of
roughly 1,250 feet (380 metres) by 950 feet (290 metres). The enveloping
geophysical anomaly is larger and may indicate a broader distribution
of REE mineralization beneath the extensive soil and colluvial cover.
Preliminary mineralogical studies by Dr. Anthony N. Mariano indicate
that monazite (an REE-thorium phosphate) may represent a significant
proportion of the REE mineralogy and that the HREE mineralization may
reside in the monazite. Grades for europium, gadolinium, terbium and
dysprosium for the current Whitetail Ridge resource estimate, as
reported in the attached comparison of REO grades table, are among the highest in North American REE
deposits.
During the 2010 drilling program, two core holes were completed in the
Whitetail Ridge area from a single drill site. Both holes
encountered significant intercepts of REE mineralization that exhibit
strong enrichment in both LREE and HREE (see attachted comparison of REO grades and REO grades and distribution tables). Only a small portion of the large Whitetail
Ridge target area was tested with the holes, but they give a good
indication of the total potential of the target. These holes, plus
historical drill hole assay data from five widely spaced older holes in
the general target area, surface mapping and trench sampling assay
data were all used directly or indirectly by Ore Reserves Engineering
to estimate an inferred mineral resource for Whitetail Ridge of 1.7
million tons (1.5 million metric tonnes) averaging 3.24 per cent total REO
(see news release dated June 14, 2011). Drilling is currently under way at
the Whitetail Ridge deposit and surrounding target area. Approximately
12 to 15 additional holes are planned for the target area this year.
REO GRADES AND DISTRIBUTION IN THE OXIDIZED ZONE OF
THE WHITETAIL RIDGE DEPOSIT
Element Ce La Nd Pr Sm Gd Y Eu Dy
Assay REO % 1.19 0.81 0.64 0.158 0.142 0.103 0.087 0.042 0.0361
Distribution oxide % 36.73 25.00 19.75 4.88 4.38 3.18 2.68 1.30 1.11
Element Tb Er Yb Lu Ho Tm
Assay REO % 0.0115 0.0057 0.0033 0.00040 0.00374 0.00052
Distribution oxixe 0.35 0.176 0.102 0.012 0.115 0.016
New high-grade REE discovery at East Taylor and HREE enrichment
The East Taylor target is located approximately 2,500 feet (760 m) west
of the main Bull Hill rare earth deposit and 2,500 feet southwest of the
Whitetail Ridge deposit. The Taylor target area was
principally known as a gold target until the 2010 drilling program
intersected a thick FMR zone in reverse circulation drill hole
SUN-090. Drill hole SUN-090 and an earlier RC hole drilled by Newmont
(SUN-009) were collared adjacent to an outcrop of FMR veins identified
by the U.S. Geological Survey (Staatz, 1983). The zone
appears to have an easterly strike, as opposed to the dominant
northwesterly and northerly mineralized structures in the Bull
Hill/Whitetail Ridge deposits. Preliminary geological mapping and
projection of FMR intercepts in drill holes suggest that the REE
mineralization consists of dikes and adjacent stockwork with dimensions
of roughly 700 feet (210 metres) east-west by 250 feet (75 metres)
north-south, and the mineralization is open to the east.
The REE mineralization was recognized in drill chips from SUN-090 by
Rare Element geologist, Allen Andersen. The mineralized intercepts were
sent subsequently for quantitative REE assays, reported here in the attached comparison of REO grades and REE-mineralized intercepts tables. Newmont hole SUN-009 also intersected strong REE
mineralization in a correlative intercept. The high-grade REE
zone in drill hole SUN-090 is contained within a well-mineralized gold
zone that averages 0.038 ounce per ton (1.3 grams per tonne) from zero to
205 feet (zero to 62.5 m). Correlative FMR mineralization was recognized also
in Newmont drill hole SUN-023, which was not assayed for REE. Several
core holes are planned as further step-off tests of the target area in
2011, including a core hole twin of drill hole SUN-090.
REE-MINERALIZED INTERCEPTS AT THE EAST TAYLOR TARGET AREA
Drill hole Interval (feet) Mineralized intercept (feet) Total REO (%)
SUN-090 45-100 55 3.38
105-160 55 7.84
SUN-009* 80-165 85 >1.4*
540-575 35 >1.4*
* REE assays for Newmont drill hole SUN-009 were done using partial
digestion analytical methods. In many cases, values exceeded the upper
limit of the method for individual REE (that is, upper assay limit for
cerium was 5,000 parts per million).
It should be noted that the company's proprietary internal standards
submitted with the samples from drill hole SUN-090 were certified at
that time for only yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, thorium and uranium, and not for the
other REE. The samples are now being resubmitted with the newly
developed standards that are certified for yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium,
gadolinium, terbium, dysprosium, holmium, thorium and uranium. Rare Element's rigorous quality assurance/quality control program
exceeds industry standards, as REE assays are routinely reported and
assessed using only analytical laboratory standards for evaluation of
data quality.
Discovery of high-grade HREEs at the carbon REE target
The carbon REE mineralization was identified by Rare Element geologist,
Allen Andersen, in drill hole SUN-079, which is a reverse circulation
drill hole that was part of the company's 2010 gold exploration
program. The carbon REE target is located about 1,200 feet (370 m)
northwest of the Whitetail Ridge deposit along an apparent
northwest-trending zone of mineralization. Two
reverse circulation drill holes (SUN-076 and SUN-079) completed during
the 2010 Sundance gold exploration program cut significant REE
mineralization in FMR vein material. REE-bearing intercepts from the
Carbon target area are summarized in the attached drill hole SUN-076 table. Total REO assays for
drill holes SUN-079 and SUN-076 were reported earlier this year in a
news release dated April 6, 2011. If this mineralization is a
continuation of the Whitetail Ridge dike system and the Bull Hill
system, the total mineralization trend may reach more than 5,000 feet
(1,500 m) in length.
REE-mineralized intercepts at the Carbon target area
drill hole SUN-076 (total depth 615 feet)
DRILL HOLE SUN-076
Interval (feet) Mineralized intercept (feet) Mineralized lithology TREO (%)
100-110 10 FMR drill chips 1.66
DRILL HOLE SUN-079 (TOTAL DEPTH 775 FEET)
Interval (feet) Mineralized intercept (feet) Mineralized lithology TREO (%)
0-5 5 FMR drill chips 1.69
15-45 30 FMR drill chips 4.69
700-760 60 FMR drill chips 3.58
Assays, quality control and standard certification
ALS Chemex conducted the assaying for the rare earth elements reported
herein in its Vancouver, B.C., assay facility. ALS Chemex
Vancouver is accredited to ISO 9001 and operates according to ALS Group
standards consistent with ISO 17025 methods at other laboratories. The
samples were prepared and subjected to lithium metaborate fusion,
followed by ICP analysis and a mass spectroscopy finish.
Analytical quality is monitored through the use of randomly inserted
quality control samples, including standards, blanks and duplicates,
which are blinded to the analytical laboratory. No duplicates were
submitted for the SUN-090 samples, owing to insufficient samples.
Results of the analyses at ALS Chemex are evaluated continuously by Dr.
Jeffrey Jaacks, the company's quality assurance/quality control consultant, who is a qualified
person according to National Instrument 43-101. The results from the
current data set indicate acceptable accuracy and precision. Blank
analyses also indicate no issues with carry-over contamination.
Rare Element Resources developed a set of proprietary internal REE
analytical standards using Bear Lodge deposit mineralized material
during late 2009 and early 2010 under the supervision of Dr. Jaacks.
The original round robin assay series at four laboratories indicated
that these materials could be used as standards for Y, La, Ce, Pr, Nd,
Sm, Th and U analyses. However, the results also indicated that the
concentration of the remaining elements in the REE series were at the
lower end of the working range of the analytical method, and standard
values gave unacceptable accuracy and precision for Eu, Gd, Tb, Dy, Ho,
Er, Tm, Yb and Lu analyses. The company conducted a new round robin
standard certification program during the first half of the current
year. The results from most recent round robin assay series qualify the
reference materials for a greater number of rare earth elements.
Improvements in analytical methods and a larger base of certification
analyses generated by utilizing eight analytical laboratories
indicate that the standards can be used as reference materials for gold,
Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Th and U analyses.
Dr.
Ranta, PhD, PGeo, president and chief executive officer
Dr. Ranta, PhD, PGeo, serves the board of directors of the company
as an internal, technically qualified person. Technical information in
this news release has been reviewed by Dr. Ranta and has been prepared
in accordance with Canadian regulatory requirements that are set out in
National Instrument 43-101. This news release was prepared by company
management, which takes full responsibility for the content.
We seek Safe Harbor.
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