Rolling Rock Resources Corporation (TSX VENTURE: RLL) -
Beacon Hill Consultants (1988) Ltd. of Vancouver, B.C. has
presented, as a part of the Preliminary Assessment (Scoping Study),
a National Instrument 43-101 revised resource estimate.
As indicated in the following table the November 2008 revised
resource estimate shows a substantial increase in tonnes and total
ounces gold ("Au") compared to the January 2008 resource estimate.
This increased resource was estimated using revised vein
interpretations and constraining solids, which define the deposit
more accurately. The estimated Inferred resources are as
follows:
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November
January 2008
2008 Revised
Estimate Estimate
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Percentage
Cut off g/t K Tonnes g/t Au K oz K Tonnes g/t Au K oz increase %
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3 4,888 6.01 944 6,304 5.98 1,212 28.3
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4 2,967 7.66 731 3,583 7.92 912 24.7
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5 1,936 9.38 584 2,308 9.85 731 25.1
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6 1,366 11.02 484 1,746 11.26 632 30.5
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7 1,008 12.63 410 1,257 13.13 530 29.2
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8 776 14.17 354 1,010 14.51 471 33.0
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9 604 15.8 307 800 16.10 414 34.8
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10 474 17.53 267 633 17.84 363 35.9
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11 381 19.25 236 506 19.69 320 35.5
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12 314 20.91 211 402 21.80 282 33.6
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Due to the uncertainty that may be attached to Inferred Mineral Resources,
it cannot be assumed that all or any part of an Inferred Mineral Resource
will be upgraded to an Indicated or Measured Mineral Resource as a result
of continued exploration.
Monument Bay is Rolling Rock's 100% owned flagship project that
was acquired in March 2006 from what was then Bema Gold Corporation
and Wolfden Resources. Monument Bay is located in Northeastern
Manitoba, 350 kilometers southeast of Thompson. Red Sucker Lake,
with full hydro electric power and airport services as well as
winter road access, lies 60 kilometers to the southwest. The
project consists of 35 contiguous claims and a mining exploration
license covering 25,706 hectares in area.
The completed Preliminary Assessment Proposal including capital
costing is forthcoming and will be reported and filed on Sedar when
received.
Methodology
A total of 414 drillholes were supplied for the Monument Bay
Deposit which are the combined drillholes for the A, A1, B, B1, C,
C1, E, G70, X1, X2, 101, 102, 104, 125 and 146 zones. This includes
drillholes from numerous exploration drilling campaigns spanning
1989 through 2007. 1989 - 14, 1990 - 36, 1991 - 18, 2003 FN holes -
4, GSC 2004 holes - 7, 1991 MAK holes - 5, 2005 MB hole - 1, 2000
SR holes - 11, 2003 SR holes - 4, 1990 STL holes - 7, 1991 STL hole
- 1, 2000 TL holes - 12, 2002 TL holes - 31, 2003 TL holes - 66,
2004 TL holes - 74, 2005 TL holes - 69, 2006 TL holes - 26 and 2007
TL holes - 28. The holes drilled during each successive campaign
were mainly drilled to the south to improve definition of the
deposit and infill drilling for better definition of resources. The
drillholes within the database included collars, downhole surveys,
assays, and lithology.
- The complete dataset including drillhole, assay, topography,
surface features, geologic data in UTM coordinates was supplied by
the Rolling Rock.
- An average S.G. of 2.73 was used for tonnage calculations.
- Solids models were created using sectional interpretations
that utilized vein intersections and grade intercepts. The solids
were used to then code the drillhole assays and composites for
subsequent geostatistical analysis.
- Solids were clipped to the overburden surface.
- Geostatistical analyses were performed on the composites using
no constraints in addition to the coded intervals within the
mineralized zone solids.
- For the purpose of the resource model, the vein zone solids
were utilized to constrain the block model by matching assays to
those within the solids and those outside the solids zones.
- In terms of selectivity and estimation quality, it was decided
that a 2.0m composite provided the best compromise between number
of composites available for estimation, and a reasonable degree of
dilution and regularization.
- 37.5 gpt was chosen as the most reasonable threshold at which
to cut grades. However, the range chosen at which to limit grades
greater than 37.5 gpt was 20 meters.
- The ellipsoid direction chosen for the estimation process was
chosen to be a 93 degrees rotation about the Z axis, -30 degrees
rotation about the X axis and 73 degree rotation about the Y axis.
Maximum ellipse size was chosen to be 350m along the major axis,
275m along the minor axis and 25m along the vertical axis.
- The block size chosen was 10m x 1m x 10m oriented at rotated
east, north, elevation respectively, in an effort to adequately
decretitize the mineralized zones so as not to inject an inordinate
amount of internal dilution and to somewhat reflect drill hole
spacing available.
- The choice of interpolator was inverse distance to the 3rd
power. For an open pit, bulk tonnage scenario, inverse distance to
the second or third power is preferred. However, in this case where
we have large high grade zones within which there are very high
grade veins being evaluated from an underground mining perspective,
inverse distance to a higher power is more appropriate as it
localizes the grade to a certain extent.
- Three estimation passes were used to estimate the Resource
Model because a better block-by-block estimation can be achieved by
using more restrictions on those blocks that are closer to drill
holes, and thus better informed. The three passes are based on
increasing levels of information used to estimate blocks where each
pass is done using being less constrained than the previous
pass.
- All blocks are classified as inferred.
W. Peter Stokes, P.Eng., President of Beacon Hill Consulting
Ltd., is independent of Rolling Rock and is the Qualified Person in
accordance with NI 43-101 and has reviewed and approved the content
of this release.
The TSX Venture Exchange does not accept responsibility for the
adequacy or accuracy of this release.
Contacts: Rolling Rock Resources Corporation Scott Angus (604)
488-1456
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