ROCA-MAX Molybdenum Drilling-Initial Results Confirm Deep Potential and Extend High Grade Zones
08 Febbraio 2008 - 2:32AM
Marketwired
VANCOUVER, BRITISH COLUMBIA ("Roca" or "the Company") provides
the following update on the exploration drilling activities at the
MAX Molybdenum project. Drilling to date has identified extensions
to known mineralization and results indicate the potential for
additional porphyry systems at depth.
Five diamond drill holes totaling approximately 4,800 metres
were completed. All holes were collared from a common underground
drill station within the No.1 Adit, east of the deposit at a
location that does not impede production mining.
The Company has now received assays from the first two holes and
a portion of the third hole of this initial program. The results
are summarized with the following brief geological interpretation.
The remaining drill cores are yet to be sampled and assayed.
Hole MX07-01 was drilled at a -45 degree dip and on mine grid
(Azimuth 230 degrees) to cross cut the lowest part of the known MAX
deposit to test continuity of higher grade zones and to assess the
mineralized alteration envelope below the limits of previous
drilling. The hole returned an impressive intersection of 186m
(610ft) grading 0.27% Mo (0.45% MoS2), including several higher
grade intervals. This intersection occurs in an area of limited
prior drilling which was previously assigned a lower grade,
significantly expanding the high grade potential of the deposit at
depth. Core sampling returned the following selected assay
results;
----------------------------------------------------------
Drill Hole # From (m) To (m) Interval (m) Mo(%) MoS2(%)
----------------------------------------------------------
MX07-01 228.0 414.0 186.0 0.27 0.45
----------------------------------------------------------
including 247.6 270.3 22.7 0.29 0.48
----------------------------------------------------------
including 276.0 294.0 18.0 0.40 0.66
----------------------------------------------------------
including 300.0 318.0 18.8 0.27 0.46
----------------------------------------------------------
including 323.8 336.0 12.2 0.68 1.13
----------------------------------------------------------
including 340.5 361.5 21.0 0.54 0.90
----------------------------------------------------------
Further, significant molybdenite (MoS2) mineralization occurred
throughout the remainder of the hole, as shown in the following
selected results indicating that the alteration/mineralization
envelope continues at depth.
----------------------------------------------------------
Drill Hole # From (m) To (m) Interval (m) Mo(%) MoS2(%)
----------------------------------------------------------
MX07-01 441.0 471.0 30.0 0.12 0.21
----------------------------------------------------------
486.0 558.0 72.0 0.13 0.22
----------------------------------------------------------
including 505.1 513.0 7.9 0.33 0.55
----------------------------------------------------------
Relative to the trend of the MAX Mine HG production zone, the
true width of the drill intervals is estimated to be 65% of the
intervals shown above. Additional drilling to explore this
extension of the deposit will be collared from new locations within
the mine workings.
Hole MX07-02 was drilled at a -62 degree dip oriented on the
mine grid, below the SE flank of the MAX deposit and returned
significant intercepts shown below;
----------------------------------------------------------
Drill Hole # From (m) To (m) Interval (m) Mo(%) MoS2(%)
----------------------------------------------------------
MX07-02 33.0 51.0 18.0 0.11 0.19
----------------------------------------------------------
176.4 219.2 42.8 0.10 0.17
----------------------------------------------------------
497.0 528.0 31.0 0.08 0.13
----------------------------------------------------------
Relative to the trend of the HG zone, true width of the
intervals shown above is estimated to be 43% of intersected lengths
in MX07-02.
Drill Hole MX07-03 was drilled at -74 degree dip from the same
collar as MX07-01, and -02 however at a different Azimuth (210
degrees) and intersected a number of high grade feeder structures
all hosted within low grade mineralization, including the following
selected results;
----------------------------------------------------------
Drill Hole # From (m) To (m) Interval (m) Mo(%) MoS2(%)
----------------------------------------------------------
MX07-03 125.7 135.0 9.3 0.13 0.21
----------------------------------------------------------
151.0 156.0 5.0 1.11 1.86
----------------------------------------------------------
404.9 410.3 5.4 0.59 0.99
----------------------------------------------------------
419.8 428.6 8.8 0.88 1.47
----------------------------------------------------------
511.0 519.3 8.3 0.15 0.25
----------------------------------------------------------
536.9 543.6 6.7 0.23 0.38
----------------------------------------------------------
Assay results have been completed for only the upper 540m of
this 1500m deep hole. Relative to the trend of the HG zone, true
width is estimated to be 21% of intersected lengths shown
above.
The significance of the intercepts in MX07-03 is that they occur
north of Mine Section 8 and above an area of Mine Sections 6 and 7
which has not been drilled previously. These intervals suggest a
deep target, the upper fingers of which may be represented by these
higher grade structures. Like other targets identified, this area
must be drilled from a station on the West side of the MAX deposit,
in the area of current mine development, in order to properly
orient drilling.
A 15cm fragment of intrusive rock, with chilled margins and
containing well mineralized (estimated greater than 0.5% MoS2)
disseminated molybdenite, was observed within a younger,
non-mineralized leucocratic quartz feldspar porphyry in the upper
part of drill hole MX07-03. The origin of this mineralized fragment
may be a separate, as yet undiscovered, molybdenite deposit at
depth, however this is not yet confirmed by thin-section
petrographic assessment. A possibly similar, weakly mineralized
porphyry phase also appears to separate the two high grade
molybdenite intervals in this hole between depths of 405 and 428.6
metres.
All three holes have intersected strong hydrothermal alteration
and textural variations within intrusive rocks that may be
indicative of multiple phases of intrusion which are spatially
associated with molybdenite mineralization. Further evidence of
this includes the identification of multiple episodes of
molybdenite mineralization based on the cross cutting relationships
of various quartz-MoS2 veinlets seen in drill core. Additional
research, including petrographic analyses, is planned to fully
document these features but these early indications of a multiple
phase intrusive and mineralizing event provide compelling evidence
for molybdenite mineralization at depth below the MAX deposit and
further exploratory work is warranted.
Assay results for the remainder of MX07-03 and MX07-04/05 will
be reported once they have been completed.
Sampling and logging of the drill holes was conducted under the
supervision of Paul Ransom, P.Geo., a qualified person as defined
by NI43-101. The sampling program included quality control
procedures, including the use of blanks and duplicates in addition
to internal quality control at the assay laboratory, ACME
Analytical of Vancouver, BC, an ISO 9001:2000 accredited
laboratory.
Mr. Scott E. Broughton, P.Eng. is the Qualified Person
responsible for the preparation of this news release.
ROCA MINES INC.
Scott E. Broughton, P.Eng. - President & CEO
The TSX Venture Exchange does not accept responsibility for the
adequacy or accuracy of this release.
Contacts: Roca Mines Inc. Doug Fosbrooke Investor Relations
(604) 684-2900 (604) 684-2902 (FAX) Email: info@rocamines.com
Website: www.rocamines.com
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