- SMDI #
- 2688
- Current Showing Name
- DAWN CLAIMS Drill holes Nos. 95-01 to 95-04
- Historical Showing Names
- DAWN CLAIMS Drill holes Nos. 95-01 to 95-04
- Company Name
- Project Name
- UTM Easting (NAD83 Z13)
- 507309.7400
- UTM Northing (NAD83 Z13)
- 6133219.8600
- NTS Sheet
- 073P07
- TRM (Township-Range-Meridian)
- 73-19-2
- Primary Commodities
- Gold
- Associated Commodities
- Copper, Iron
- Discovery Type
- Drillhole
- Status
- Occurrence: Primary Exploration
- Geological Details
- The showing consists of gold mineralization encountered by drill holes 95-1 to 95-5. The showing is located on the north shore of the southernmost of the Jepson Lakes approximately 0.4 mile (0.6 km) southwest of the drill holes which constitute SMDI 0799.
In 1995, R. Maxeiner and T. Sibbald, et al mapped the showing area (1:50,000). The north shore of the southernmost Jepson Lake is underlain by unit C or a mixed series of pale green, massive to poorly layered, calcareous psammites (medium-grained amphibolite, amphibolite-mica schist, and mica±garnet-quartz-feldspar-biotite schist) and calc-silicate rocks (diopside±feldspar±epidote±carbonate rock). Locally, these psammitic and calcareous metasediments contain lean iron formation horizons. To the northwest, the unit C rocks make contact with a series of medium grey to greenish grey, fine- to medium-grained, well layered greywackes or unit W (biotite±muscovite±garnet±magnetite±pyrite±hornblende ±epidote±calcite sediments which contain cherty layers, calcite and epidote concretions). The greywackes exhibit graded bedding and cross bedding in some outcrops. To the southeast of Jepson Lake, Unit C contacts with unit Gm or pink to white, medium- to coarse-grained, equigranular, massive to poorly foliated. megacrystic granite or the Jepson Lake Pluton.
The drill holes intersected a series of banded, dark grey to black, magnetite-rich, oxide facies iron formation horizons which are interbedded with silicate facies iron formation horizons, black, graphitic lean iron formations and biotite schists, black, pyritic, carbonaceous exhalite horizons, calc-silicate metasediments, and wackes. This sequence of rocks is strongly sheared and cross-cut with quartz and carbonate veining.
The oxide facies iron formation often contains narrow intervals of NSS magnetite. The above series of rocks hosts disseminations to near solid intervals of pyrite and pyrrhotite, up to 1% chalcopyrite, and local graphite. The better intersections returned the following values:
DRILLHOLE INTERSECTION WIDTH PPM OZ/TON INTERSECTION
NUMBER (FT) (FT) AU AU DESCRIPTION
_____________________________________________________________________________
95-01 13.1 - 14.1 1.0 ---- 0.024 po-py: oxide facies lean iron fm
14.6 - 15.1 0.6 ---- 0.018 py-po: oxide facies lean iron fm.
15.1 - 16.2 1.1 ---- 0.042 lean iron formation-bio schist
95-02 39.9 - 40.9 1.0 ---- 0.014 lean iron formation+amphibolite
95-03 47.1 - 48.2 1.1 ---- 0.018 sheared lean iron formation
48.2 - 49.1 0.9 ---- 0.021 fractured lean iron formation
52.1 - 53.1 1.0 ---- 0.128 fractured lean iron formation
95-04 48.7 - 49.7 1.0 ---- 0.092 fractured lean iron formation
- Geological Domain
- Glennie
- Host Rocks
- Host Minerals
- Indicators
- Exploration History
- 3/1/1999 In 1957, excavation of seven trenches was reported on the MM1-36 claims on the central western shore of Jepson Lakes by R. Myke for Green Bay Mining and Exploration Ltd. The showing is claim MM no. 7.
In 1960, the Cartier Quebec Explorations Ltd. held the TOW claims 1 to 10 on the west shore of the north end of Jepson Lakes, continuing further north. In 1962, the showing area was covered by SPUTNIK claim no. 6 (S-80512). Carter Quebec completed EM, magnetic and geological surveys in the Jepson Lakes area. In October of 1963, the showing was staked as LEE claim no. 68 (S-77047). The claim was dropped in February of 1965. In 1965, L.G. Kelly prospected in the area investigate an airborne conductor. Six trenches in the area were noted, however, only graphite and disseminated pyrite-pyrrhotite were noted.
In 1969, the showing was staked as SL claims Nos 2 and 4 (S-89872 and S-89873). In the same year, the La Ronge Mining Ltd. conducted electromagnetic and magnetic surveys on the southwest shore of the Jepson Lakes, then covered by the SL2-7 and WHIST 1-7 claims. This was followed by the drilling of 8 holes (AF 73P07-0081).
In 1969, La Ronge Mining did further work between Jepson Lakes and Waden Bay on CBS 1450, 1451 and 1454. Ground electromagnetic and magnetic surveys were conducted and three holes were drilled on the north shore of Aikenhead Lake 2 miles (3.2 km) southwest of Jepson Lakes. The properties were allowed to lapse on 1972, 1973, and 1976. The area was examined and reported on in 1971 by L.H. Forsythe who examined the area for the Saskatchewan Geological Survey.
On 10 April 1981, Durama Enterprises staked the showing area as CBS 7070. In 1983, a ground EM and magnetic survey was completed on the disposition (AF 73P07-0168). On 1 January, 1984, the immediate showing area was staked as the DAWN claims or S-96832 and S-98306 within CBS 7070. Between 1984 and 1985, Durama completed limited geological mapping, prospecting and ground EM and magnetic surveys to the northwest of the showing on Sulphide Lake (AF 73P07-0188).
In 1985, SMDC optioned CBS 7070 from Durama and completed a anomaly check program of geological mapping, prospecting and rock and geochemical sampling on the property (AF 73P07-0190). In the following year, further prospecting and rock and till sampling was completed on the DAWN Claims (AF 73P07-0243). In 1988, Cameco geologically mapped the Jepsen Lakes area and completed prospecting and rock and soil sampling (AF 73P07-0259).
In 1990, Durama optioned the property to Homestake Mines. They completed a reconnaissance gold exploration program of prospecting and sampling which failed to return significant values (AF 73P-0017). In 1991, Homestake completed reconnaissance prospecting of the area between Jepson Lake and Stewart Young Bay (AF 73P-0019). The property then reverted to Durama Enterprises. In 1995, Durama completed ground HLEM and magnetic surveys over the DAWN claims (AF 73P07-0329). In the following year, they completed holes 95-1 to 95-6 on the DAWN claims (AF 73P07-0330). These holes encountered the mineralization which constitutes this showing.
- Production History
- Reserves and/or Resources