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Re: News Releases - Thursday, February 07, 2008
ROCA - MAX Molybdenum Drilling - Initial Results Confirm Deep
Potential and Extend High Grade Zones
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Vancouver, British Columbia: Roca Mines Inc. (ROK: TSX-V) ("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 >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 Broughton, P.Eng. is the Qualified Person responsible for the
preparation of this news release.
ROCA MINES INC.
"Scott Broughton"
Scott E. Broughton, P.Eng. - President & CEO
For further information contact:
Doug Fosbrooke
Investor Relations
Tel: 604-684-2900
Fax: 604-684-2902
Email: info@rocamines.com
Web: www.rocamines.com
The TSX Venture Exchange does not accept responsibility for the
adequacy or accuracy of this release.
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Copyright (c) 2008 ROCA MINES INC. (ROK) All rights reserved. For
more information visit our website at http://www.rocamines.com/ or send
mailto:info@rocamines.com
Message sent on Thu Feb 7, 2008 at 5:35:31 PM Pacific Time
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