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May 24, 2013
Rockland Adopts Advance Policy Notice
2011 Drilling at Retty Lake
|Retty Lake Drill Results|
Rockland commenced a 1500 meter drill program in mid-May 2011 at Retty Lake. The PDF below outlines some of the target zones. Please check this section for updates and results on a regular basis.
|Retty Lake Drill Targets 2011||Retty Lake Core Photos - "Net-Texture" Sulphides|
The Retty Lake area of the southern Labrador Trough holds potential for the discovery of economically important massive and disseminated Cu-Ni-PGE bearing sulphide deposits. This conclusion is supported by company, government and university geologists active in the area almost continuously since the 1940's. Recent work by Québec government geologists has discovered key similarities between the Cu-Ni-PGE occurrences at Retty Lake, and the Cu-Ni-PGE deposits in the southern Raglan District in the Ungava region. Rockland Minerals' claims cover key stratigraphic horizons that are on-trend with known Cu-Ni-PGE mineralization at the Blue Lake, Centre and Pogo deposits at Retty Lake. Rockland’s goal is to discover additional mineralized lenses (on trend) and develop the Labrador Trough as the next major mining camp in the Province. Rockland has an option to earn a 100% interest in 210 mineral claims that make up the Retty Lake property.
These "Blue Lake" deposits at Retty Lake are massive sulfide lenses at the base of a folded peridotote unit, and consist mainly of pyrrhotite, chalcopyrite, pentlandite and magnetite. Platinum group elements are closely associated with Cu-rich sheared margins of massive sulphide lenses and in their adjacent chloritized host rocks. The Blue Lake sulfides were discovered in the late 1940's, explored by drilling in the 50's and 60's, and a bulk sampling adit was driven in the 1980's. Historical estimates of grades and tonnages for these Blue Lake massive sulphide lenses have been frequently cited in the geologic literature by Québec government geologists and by academic researchers. Under the old system of Mining Permits, the Québec government did not require full disclosure of exploration data, and no formal disclosure meeting National Instrument 43-101 standards has been made, by either the previous owner or the present owner.
The government and academic publications state specific grades and tonnages for 4 main massive sulfide lenses at Blue Lake. In general, each of the 4 massive sulfide lens is reported to contain about 1 Mt of mineralized material averaging approximately 0.5% Ni and slightly less than 1% Cu. In addition, the cited Québec government literature sources state that the mineralized material in these massive sulfide lenses contains just under 1 g/t combined Pt+Pd, which was the focus of the exploration effort in the late 1980's by Group Platine de la Fosse.
* These historical tonnage and grade estimates have not been verified. These estimates, while believed to be reasonable, predate National Instrument 43–101 standards. These figures do not represent a resource as defined by National Instrument 43-101, and should not be relied upon by investors. In general, these historical estimates are included herein only as an example of the type of deposits known to occur within the Retty Lake region, and are not necessarily indicative of other mineralized zones within the specific Retty Lake Project area.
NW Retty Lake
The NW Retty Lake area in the southern portion of the claim group, is in the vicinity of Hollinger North Shore Exploration drill hole A-27, where significant Cu-Ni values were reported in 1957 drilling. This area is the likely area of the "Retty Lake Deposit" --- presumably drilled in the 1960's at this approximate location, has not been proved or disproved despite an intense literature search and interviews with geologists who worked in the area from the 1970's onward. The discovery of a cache of approximately 192 aluminum drill core trays dating from 1968, and approximately 25 plastic drill core boxes dating from 1975, at an overgrown campsite on the shore of Retty Lake, close to this location lends credence to the existence of mineralization on the Rockland claims that was never fully documented or reported to the Québec government in assessment report form.
The intensely folded, layered rock units in the Retty Lake area have very diagnostic geophysical signatures; the peridotite units are highly magnetic, and massive pyrite and pyrrhotite zone at the top of the Thompson Lake Fm. sediments is a strong EM-conductor which provides an indirect signature of possible buried Cu-Ni-PGE mineralization. Accordingly, the focus of the 2007 and 2008 field work was to identify and lay-out an initial drill program based on geological and geochemical criteria. The 2010 airborne geophysical survey will compliment this recent work and lead to a clearer picture of the discovery potential of the entire Retty Lake claim package. Rockland believes that the target zone at the base of the peridotite unit hosting the Blue Lake Cu-Ni-PGE occurrences is sufficiently well-defined to site the first drill holes, and that there is an excellent chance of discovering additional Cu-Ni-PGE mineralization using the old data from the 1950's and 1960's as a guide.
2010 summer Airborne Survey at Retty Lake
Raglan to Labrador Trough
The Cu-Ni-PGE deposits in the Retty Lake area are similar to ore deposits in the southern Raglan (Cape Smith) mafic rock belt of the Ungava , in northern Québec. The southern Raglan belt sulphides are associated with ultramafic sills and have Ni:Cu ratios of approximately 1:1 and are enriched in PGE's. Currently, Jilin Jien Nickel Industry Co., Ltd. (formerly Canadian Royalties) is developing several Cu-Ni-PGE deposits in the southern Raglan belt. Interestingly, in 2007, Canadian Royalties staked a large number of claims completely surrounding the Rockland Minerals Corporation claim groups at Retty Lake. This is interpreted by Rockland as strong confirmation of the discovery potential for Cu-Ni-PGE deposits in the Retty Lake area -- based on geological and Geochemical and geophysical similarities with the southern Raglan belt. Unlike the remote Ungava region, the Retty Lake project is close to support infrastructures such as the railhead, airport, seaplane base and hydroelectric power lines at Schefferville, Quebec.