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Glacier Creek

The Glacier Creek prospect consists of 2 stratigraphically stacked horizons referred to as the RW Zone and the Main Zone as well as the repetition of these horizons on the overturned limb of a faulted anticline referred to as the Southwall Zone.

RW ZONE DISCOVERY PLAN MAP

RW Zone
The RW zone consists of a body (or bodies) of stratiform baritic semi-massive and massive zinc- and copper-rich sulphide, with subordinate chert, altered tuff, and limestone.  It is well exposed on the west side of Mt. Morlan at the Little Jarvis occurrence, where it can be traced discontinuously along the slope for about 50 m - it is covered by ice and rubble to the north and south.  The RW zone horizon at Little Jarvis varies in thickness from 4-5 m to a few tens of centimeters.  Chip samples from the horizon have yielded up to 13.0% Zn, 7.0% Cu, 0.02 oz/ton Au, and 7.0 oz/ton Ag over 4.6 m.  More recent chip sampling at the same locality yielded somewhat lower grades, of 10.8 % Zn, 0.27% Cu, 0.17 ppm (0.005 oz/ton) Au, and 44.2 ppm (1.29 oz/ton) Ag over 3.05 m.

On the southeast side of Mt. Morlan, the RW zone is exposed at the Upper Main and UMP occurrences, as well as in sporadic exposures in between.  Massive barite and sulphide at the Upper Main occurrence can be traced along slope for about 70 m, where it is as much as 7 m thick; it pinches out to the west and is covered by overburden to the east.  A 6.10 m chip sample grading 8.0% Zn, 1.4% Cu, 1.3% Pb, 9.5 oz/ton Ag, 0.03 oz/ton Au was collected by Kennecott at the Upper Main occurrence.  The UMP occurrence consists of a 1-2 m thick section of sphalerite-carbonate rubble, which yields grab samples grading up to 18.75% Zn.  It can be traced along slope for a few tens of metres, but is covered by overburden to the east and west.  Much of the area between the Upper Main and UMP occurrences is inaccessible because of steep slopes or is covered by overburden, but the stratigraphic interval in this area consists of variably mineralized calcareous tuff and argillite, and minor massive barite.

With its known correlatives at the Little Jarvis, Upper Main, and UMP occurrences, the RW zone baritic massive sulphide horizon has a known strike length of 610 m, a drill-indicated down-dip extent of at least 200 m, and a maximum known thickness of 12 m.  The primary (hypogene) mineralogy of the RW zone consists of barite, sphalerite, pyrite, chalcopyrite, quartz, and galena, with lesser calcite, magnetite, pyrrhotite, arsenopyrite, and possible sulfosalts.  Parts of the massive sulphide horizon on the southeast side of Mt. Morlan have been extensively leached of sulfides and are underlain by supergene copper and zinc oxides that extend 60 m or more into the footwall.  Significant drill intersections of leached and non-leached parts of the RW zone are listed in the accompanying table. Diamond drilling in 2006 by Constantine confirmed for the first time that the oxidized and leached surface showings correlate with high grade massive sulphide down dip (CMR06-01 - 5.12 meters, 10.86% zinc, 0.13% lead, 0.23% copper, 0.134 g/t gold and 44.4 g/t silver, CMR06-02 – 0.79m of 19.5% zinc)

Summary of diamond drill hole intersections of barite-sulphide mineralization from the RW zone horizon, including zones of footwall stockwork veining.  True widths of semi-massive to massive barite-sulphide mineralization are approximately 80% to 100% of reported widths.


Hole #
Interval
(feet)
Length
(feet)
Zn
%
Cu
%
Ag
oz/ton
Au
oz/ton
Comments
CMR06-01 338.2-358.0 19.8 9.60 0.22 1.27 0.004 Massive barite-sulphide
including 338.2-355.0 16.8 10.86 0.23 1.41 0.005 Massive barite-sulphide
CMR06-02 338.4-341.0 2.6 19.50 .004 0.15 <0.001 Massive sulphide
RMC99-14 634.3-653.8 19.5 1.28 0.42 0.07 0.001 Stockwork zone
RMC99-14 647.7-715.5 67.8 0.27 0.62 0.09 0.001  Stockwork zone
including 649.3-665.5 16.2 0.46 1.50 0.15 0.002     “
RMC99-13  596.0-603.2 7.2 13.48 0.21 0.37 0.001   Dissem. to massive sulphide
including  599.0-603.2 4.2 21.50 0.34 0.52 0.003   Semi to massive sulphide
RMC99-12 538.2-546.5 8.3 5.85 1.89 0.99 0.006   Massive sulphide
including 538.2-543.5 5.3 8.64 1.41 1.14 0.008      “
including 542.0-546.5 4.5 3.18 3.04 0.81 0.003      “
RMC99-11 621.0- 628.4 7.4 4.90 0.03 3.05 0.020   Massive sulphide
including 621.0- 626.3 5.3 6.37 0.09 4.00 0.020     “
RMC99-11 805.0-848.8 43.8 1.23 0.04 0.03 <0.001   Stockwork zone
RMC99-10 531.5- 546.5 15.0 4.01 0.40 0.45 0.002   Sulphide-rich barite + stringers
including 531.5- 537.0  5.5 5.31 0.31 1.03 0.005      “
RMC99-10 546.5- 555.5  9.0 0.24 2.29 0.56 0.009   Stringer zone
including 546.5- 552.2  5.7 0.34 3.18 0.80 0.012      “
RMC99-10 572.5-635.0 62.5 0.57 0.06 0.03 <0.001   Stringer zone
RMC99-08 273.0-280.0 7.0 2.64 0.33 0.30 0.001   Stringer zone

RW ZONE DISCOVERY SECTION
 


RW ZONE SECTION 420850E - 2006 DRILL INTERCEPTS

 Main Zone
The Main zone mineralization refers to a massive barite-sulphide horizon that is located in the hanging wall to the MZ fault, roughly 90 m stratigraphically below the RW zone horizon.  It is exposed on the southeast side of Mt. Morlan at the Main occurrence, where it is 2-4 m thick and traceable along surface for 120 m.  It is truncated to the southwest by the MZ thrust, and appears to pinch into intensely quartz, sericite, and pyrite altered rocks before it is lost beneath talus cover to the northeast.

Massive barite-sulphide at the Main zone massive sulphide horizon is similar to that found in other exposures and intersections of the RW zone horizon.  Where exposed, it is typically leached of sulphides and consists of iron-oxide stained, variably siliceous vuggy or porous barite and barite sand.  Primary sulphide mineralogy is rarely preserved, although a few weakly oxidized enclaves consist of medium- to coarse-grained sphalerite, chalcopyrite, galena, and pyrite, as well as rare microscopic magnetite, bornite, and sulfosalts.  A 3.05 m chip sample from the Main zone occurrence graded 1.91% Zn, 1.05% Cu, 0.46% Pb, 3.34 oz/ton Ag, and 0.034 oz/ton Au.  The Mineralization exposed at the Main zone occurrence has only been intersected by one diamond drill hole (RMC98-02), which cut 4.3 m of near surface leached baritic massive sulphide grading 0.25% Zn, 0.05% Cu, 0.19% Pb, 0.24 g/t Au, and 21 g/t Ag.  The same drill hole also intersected footwall zones of supergene Cu and Zn oxide, and these graded up to 1.1% Zn and 0.14% Cu over nearly 20 m.  All drill holes that tested the RW zone horizon stopped short of the stratigraphic interval hosting the Main zone except for CMR06-02 that intersected strong alteration and anomalous basemetals associated with the interpreted position of the Main Zone.

SCHEMATIC COMPOSITE LONG SECTION
 

Southwall Zone
 A leached stratiform massive barite-sulphide and chert horizon occurs a short distance down slope from the Main and Upper Main occurrences, within an overturned section of stratigraphy in the footwall to the MZ thrust fault.  It lies in the same stratigraphic position as the RW zone horizon, is up to 2-3 m thick, and has been intersected in two drill holes (GC-03 and RMC98-02). RMC98-02 actually stopped in barite-sphalerite rich sulphide mineralization that assayed 3.47% zinc over 6.04m. Geological mapping and soil sampling indicates that the Southwall Zone that consists of the overturned RW and Main Zone horizons extends for a considerable distance into the heavily vegetated lower slopes and offers a priority exploration target at lower elevations.

SCHEMATIC COMPOSITE CROSS SECTION
  


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