Xtierra Reports High Grade Silver Intercepts in Drilling Immediately South of the Bilbao Deposit
June 27 2011 - 11:42AM
Marketwired
Xtierra Inc. (TSX VENTURE: XAG) ("Xtierra" or the "Company"), is
pleased to report the completion of a program of eight diamond
drill-holes, totalling 2,648 metres, in the southern part of the
Bilbao project, Zacatecas, Mexico. The programme investigated two
types of silver-rich targets located immediately to the south of
the main polymetallic Bilbao deposit upon which Xtierra is
completing a feasibility study. The targets, all with high grade
silver content, comprised high angle hydrothermal veins and
brecciated limestone horizons. Two Holes (X-86C and X93)-tested
geophysical anomalies (magnetic) located 50-70 metres further to
the south.
Six separate mineralized veins and/or fault-fillings were
identified. Four of the mineralized fault structures trend NNW-SSE
while another two veins strike NNE-SSW; the former have strong
base-metal values while the later contain silver values of up to
664g/t silver and have been traced over a strike length of at least
70m and remain open-ended.
The holes were targeted to assist in determining the
characteristics and continuity of the high grade silver veins
previously found in drill-hole X26 at the southern margin of, and
beneath, the main Bilbao deposit. The width of these structures
varies, with veins averaging about 1m true thickness and
fault-fillings up to 12m in thickness. The veins, which are
comprised of amethystine quartz with calcite, are closely related
with the contact of the limestone horizons with the main La Blanca
granitic batholith.
The NNW-SSE structures typically contain higher base-metal
values with combined zinc and lead values of 14.95% (4.85% lead and
10.10% zinc) including 0.31% copper and 97.9g/t silver over 4.65m
in DDH X86-B, 21.39% combined zinc and lead (9.96% lead and 11.43%
zinc) including 0.27% copper and 127.6g/t silver over 1.05m in DDH
X86A, and in DDH X86B-1 there is an intersection of 12.10m with
average grades of 9.08% combined zinc and lead (4.17% lead, 4.91%
zinc) including 0.63% copper and 109.4g/t silver. Several other
narrower intersections have been recorded. Not all analyses have
been received and these will be reported when available.
The three-dimensional morphology of the silver veins is not yet
fully understood. Although the intersections are high angle
intercepts, insufficient drilling has been completed on each vein
structure to permit the precise calculation of true width. The
table appended below indicates intersected width which is likely to
be within 15% of true width.
Drilling has shown that the richer silver veins trend NNE-SSW, a
direction which accords with similar vein trends to the north of
the Bilbao deposit, within the La Blanca granite. Discovery of this
zone of silver-rich veins beneath and in addition to the main
skarn-replacement zinc-silver-lead-copper mineral deposit at Bilbao
is expected to contribute to both tonnage and silver content of the
resource. However, additional drilling will be required before any
new resource estimate can be made.
Commenting on the preliminary drill results on the high grade
silver zone, Xtierra's CEO, Terence McKillen, said "The recognition
of rich silver-bearing vein structures at the Bilbao project is
very encouraging and opens up the potential for identifying
additional resources, to the south of the main Bilbao deposit. The
existence of NNE-SSW striking vein structures containing grades of
over half a kilogram per tonne silver is a particularly exciting
development. This exploratory drilling program has been conducted
as part of a Feasibility Study pertaining to all aspects of the
Bilbao project which is currently being undertaken under the
independent supervision of DRA Americas."
Analytical Method
Samples from half-core were prepared at the Stewart Group
laboratory in Zacatecas and initially analyzed for 38 element
content using ICP-MS (inductively coupled plasma - mass
spectrometry) by the Stewart Group (Eco-Tech Laboratory) in
Kamloops, British Columbia. Values exceeding the limits of
detection are automatically re-analyzed by Fire Assay or Atomic
absorption spectrometry (AAS) methods respectively. Standards and
blanks were used regularly for quality control.
----------------------------------------------------------------------------
Drill-hole # From (m) To (m) Intersected Level Zone
Width (m)
----------------------------------------------------------------------------
X40-1 207.95 211.75 3.80 1945.21 F3
----------------------------------------------------------------------------
X40-1 218.65 222.15 3.55 1934.67 F2
----------------------------------------------------------------------------
X40-1 413.65 416.00 2.35 1742.63 V1/2
----------------------------------------------------------------------------
X40-1 420.45 423.00 2.55 1735.94 V1/2
----------------------------------------------------------------------------
X40-1 V1/2
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X86A 212.00 217.00 5.00 1948.22 V3
----------------------------------------------------------------------------
X86A 284.50 285.60 1.05 1878.15 V4
----------------------------------------------------------------------------
X86A 374.50 376.00 1.50 1791.26
----------------------------------------------------------------------------
X86A 386.00 387.00 1.00 1780.15
----------------------------------------------------------------------------
X86A 396.00 396.55 0.55 1770.49 V1/2
----------------------------------------------------------------------------
X86A 407.35 408.40 1.05 1759.53 V1/2
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X86B 243.50 248.15 4.65 1917.80 V4
----------------------------------------------------------------------------
X86B 255.00 258.45 3.45 1906.69 F2
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X86B-1 243.90 256.00 12.10 1912.81 F2
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X86-C
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X93
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X87-1 267.00 268.00 1.00 1893.10 F1
----------------------------------------------------------------------------
X87-1 386.60 389.00 2.40 1777.57 V4
----------------------------------------------------------------------------
X87-1 413.75 415.30 1.55 1751.35 V1/2
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Drill-hole # Ag (g/t) Pb (%) Zn (%) Pb+Zn (%) Cu (%)
----------------------------------------------------------------------------
X40-1 23 2.71 2.12 4.83 0.25
----------------------------------------------------------------------------
X40-1 71.2 3.09 2.00 5.09 0.20
----------------------------------------------------------------------------
X40-1 89.0 4.40 1.32 5.72 0.06
----------------------------------------------------------------------------
X40-1 329.0 0.07 0.52 0.59 0.01
----------------------------------------------------------------------------
X40-1 awaited
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X86A 114.7 1.12 0.76 1.88 0.08
----------------------------------------------------------------------------
X86A 127.6 9.96 11.43 21.39 0.27
----------------------------------------------------------------------------
X86A 230.0 0.16 0.78 0.94 0.01
----------------------------------------------------------------------------
X86A 218.0 0.19 0.94 1.13 0.01
----------------------------------------------------------------------------
X86A 218.0 0.06 0.52 0.58 0.01
----------------------------------------------------------------------------
X86A 664.3 0.20 2.20 2.40 0.01
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X86B 97.9 4.85 10.10 14.95 0.31
----------------------------------------------------------------------------
X86B 24.9 2.07 1.48 4.18 0.11
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X86B-1 109.4 4.17 4.91 9.08 0.63
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X86-C awaited
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X93 awaited
----------------------------------------------------------------------------
----------------------------------------------------------------------------
X87-1 29.6 2.55 3.10 5.65 0.01
----------------------------------------------------------------------------
X87-1 335.5 1.59 1.11 2.70 0.34
----------------------------------------------------------------------------
X87-1 578.7 0.20 0.33 0.53 0.01
----------------------------------------------------------------------------
A summary of the main mineralized zones intersected
Qualified Person
Information of a scientific or technical nature contained in
this release has been prepared by or under the supervision of
Terence N. McKillen, P.Geo., Chief Executive Officer, Gerald J.
Gauthier, P.Eng., Chief Operating Officer and Dr. Anthony C.
Gallon, C.Eng., Chief Geologist, all 'Qualified Persons' within the
meaning of National Instrument 43-101 - Standards of Disclosure for
Mineral Projects of the Canadian Securities Administrators.
About Xtierra Inc.
Xtierra Inc. is a Toronto based exploration and development
company listed on the TSX Venture Exchange under the symbol "XAG".
There are 103,272,142 shares issued and outstanding. The Company is
completing a feasibility study on its Bilbao
silver-zinc-lead-copper project in Zacatecas, Mexico. Xtierra's
objective is to become a mid-tier producer of precious and base
metals through the development of its Bilbao project as well as
through exploration, organic growth and M & A
opportunities.
For further information visit www.xtierra.ca.
Neither the TSX Venture Exchange nor its Regulation Services
Provider (as that term is defined in the policies of the TSX
Venture Exchange) accepts responsibility for the adequacy or the
accuracy of this release.
Contacts: Xtierra Inc. Terence McKillen President & Chief
Executive +1 (416) 362-8243 Xtierra Inc. Tim Gallagher Director +1
(416) 925-0090 Xtierra Inc. Alejandro Alaniz Director Finance &
Administration (Mexico) +52 (492) 925-0804 www.xtierra.ca
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