The 2949.2 hectare ROHAN Property comprises 9 MTO claims in northern British Columbia, located just south of the Yukon border, 80 kilometres south of White Horse, YK, and 80 kilometres northwest of Atlin BC. Logistically, the property is well situated along the White Pass rail line, 60 kilometres north of Skagway, Alaska, with easy boat access to the property from Carcross, YK.

Engineer Mine
The newly staked area covers a 6 kilometre span of the prospective Llewellyn/Tally-Ho shear zone, part of a larger (>150 kilometre long) crustal-scale fault system, host to numerous gold, silver and base metal properties. The Engineer Mine, west of Atlin BC, is one of the most famous:
“The historic Engineer Mine was a high-grade gold producer that reached its zenith in the mid-1920s… More than 560 kilograms of gold were officially produced at a realized grade exceeding 39 g/t gold from high-grade epithermal quartz-carbonate veins” BC-Gold Corp (TSX-V: BCG) NR, Oct 5, 2009.

Recent exploration by BC-gold continues to release significant DDH intercepts with a NI 43-101 compliant resource estimate expected to be released in March 2011:
“Demonstration of continuity of high-grade shoots at the Engineer Mine (drill hole BCGE10-11 intersected 129.0 g/t Au, 121.6 g/t Ag over 1.00 m and drill hole BCGE10-01 intersected 22.32 g/t Au, 17.6 g/t Ag over 0.96 m, within the Engineer and Double Decker veins respectively” BC-Gold Corp (TSX-V: BCG) NR, Jan 31, 2011.

Rohan Project

The new shear-hosted land package covers several regional stream-silt (RGS) anomalies that includes better than 95th percentile values for Au, Cu, Sb, As and Pb. The RGS anomalies, located along a major crustal scale fault system (Llewellyn/Tally-Ho), combined with known on-strike gold-bearing showings to the north and south, make the new property a highly prospective addition to the Eagle Plains tenure holdings.

In the Atlin area, the Llewellyn fault zone (LFZ) and overlapping Tally-Ho shear zone (THSZ) marks, but is not constrained to, a major tectonic boundary between units of the Whitehorse Trough to the east, and the Boundary Ranges metamorphic suite to the west (Mihalynuk, 1999). Splay faults off the LFZ, cutting through Jurassic sediments of the Laberge Group and Triassic volcanic rocks of the Stuhini group, are host to a number of important mineral deposits including the Engineer Mine, and Rupert Showings..

Tertiary intrusive rocks are also associated with Au in quartz-calcite veins at the Ben-my-Chree past producer and Titan showing, with the latter also associated with Mo-Cu “porphyry” style mineralization. The Boundary Ranges metamorphic suite is host to precious and base metal quartz vein mineralization at the Gridiron and Bighorn mines.

Two kilometres south of the new tenure, the past-producing Grid Iron silver, gold, lead, zinc occurrence is also hosted in identical sheared strata:

GridIron BC
Located 2 kilometres south of the Rohan Property, the Gridiron adit is located about 9 metres above the western shore of Bennett Lake on a west-trending shear zone.
The shear zone occurs in the Devonian to Permian and older Boundary Ranges Metamorphic Suite near the contact margins of the Coast Plutonic Complex and the Intermontane Belt. These rocks comprise chlorite feldspar gneiss, schist, marble and hornfels feldspar porphyry. The east-west adit follows a crushed zone of quartz and talcose matter carrying several per cent galena, tetrahedrite, arsenopyrite, pyrite and minor sphalerite.
A clearly defined quartz vein, about 0.2 metres wide, near the adit portal was reported (1901) to carry high gold and silver values. In 1901, 68 tonnes of ore were mined producing 2,582 grams of silver and 156 grams of gold. A sample of the quartz vein taken in 1982 assayed 3.2 grams per tonne gold, 315 grams per tonne silver, 2.05 per cent lead and 1.34 per cent arsenic.

Regional Geology Description (Atlin to southern Yukon)
The Tally Ho shear zone (THSZ) is a 40-km-long zone of highly strained rocks along the western margin of the Whitehorse Trough in southern Yukon, first recognized by Hart and Radloff (1990). The deformed belt of rocks is 3 km wide and separates the Stikine Terrane to the east from Nisling Assemblage rocks of the Yukon-Tanana Terrane to the west. In the Yukon, western Stikinia includes the Upper Palaeozoic Takhini assemblage and the Upper Triassic to Lower Jurassic Lewes River and Laberge Groups of the Whitehorse Trough.

The Rocks of the Tally Ho shear zone are mainly part of the Upper Triassic Lewes River Group. Regionally, the Lewes River Group consists of dominantly volcanic Povoas formation overlain by sedimentary Aksala formation. The Pavoas formation is correlative to the British Columbia equivalent Stuhini formation, and together they form the Lewes River Arc. The area is crosscut by numerous Jurassic, Cretaceous and Eocene intrusive bodies. Post kinematic granitoid rocks dated at 173 Ma provide a lower age limit of deformation along the THSZ.

The THSZ is structurally overprinted by the younger Llewellyn fault zone (LFZ) which extends southwards into BC. In the Taku arm area west of Atlin, the LFZ marks but is not constrained to a major tectonic boundary between units of the Whitehorse Trough to the east, and the Boundary Ranges metamorphic suite to the west. Splay faults of the LFZ cutting through Jurassic sediments of the Laberge Group and Triassic volcanics of the Stuhini group are host to a number of important mineral deposits including the Engineer Mine, and Rupert Showings. Tertiary intrusive rocks are also associated with Au in quartz-calcite veins at the Ben-my-Chree and Titan showing, with the latter also associated with Mo-Cu “porphyry” style mineralization. The Boundary Ranges metamorphic suite is host to precious and base metal quartz vein mineralization at the Gridiron and Bighorn mines.

Local Geology (BC/Yukon border area)
Regionally mapped rock units in the target area near the BC/Yukon boarder include upper Permian to Triassic foliated and hornfelsed volcanic schists of the Takhini Formation, and augite and feldspar phyric intermediate to mafic volcanic flow units of the Povoas Formation. Lower to Middle Jurassic overlap assemblage rocks of the Laberge Group outcrop near the BC border on the east flank of Bennett Mountain. At least 3 younger volcanic units also outcrop in the target area: Middle Cretaceous Mount Nansen dark green to grey andesite; Upper Creatceous Carmacks augite olivine basalt breccia, andesite and dacite flows and related epiclastics; and Lower Eocene Skukum flow banded rhyolite-andesite flows and breccia, tuff and related epiclastic rocks.

Intrusive rocks in the target area include Middle Jurassic monzodiorite to quartz monzodiorite of the Bennet Pluton, and leucocratic granite, granodiorite and monzonite of the early Tertiary Pennington Pluton.

Exploration History (Yukon side of border area)
Previous work by Rushant at the Finger claims of the southern Yukon, noted mineralization along a 300 meter shear zone that included galena, sphalerite, pyrite and chalcopyrite hosted in sheared felsic to andesitic volcanics. The mineralization occurs as stringers and disseminations in a khaki coloured propylite made up of actinolite, chlorite and epidote; and as disseminations and blebs in sheared, carbonatized, felsic to andesitic rock of fine to brecciated texture. Magnetite is observed in a variety of rock types, but is reported diminished in the sheared zone.

Historical descriptions of the shear structure are vague, but the main structure of interest is reported as trending Az040 for approximately 600 meters. At least 16 hand pits were excavated over approximately 300 meteres of the identified shear zone noted above.
A north-trending shear zone uncovered on Scout # 1 claim cuts across the property and is probably associated with the Tally-Ho Shear Zone. The shear contains numerous zones of quartz-calcite veining with propylitic and argillic alteration. These zones range up to 2.0 m wide but are generally less than 0.5 m. Four samples of this material contained over 100 ppb Au, the highest assay being 400 ppb Au. Silver values ran as high as 22 ppm, and Pb values as high as 1562 ppm.
A second north-trending structure cutting metavolcanic rocks on the Scout # 9 claim was found to host a quartz-sulphide breccia zone up to 0.6 m wide. A chip sample across the structure returned 1.47% Zn, 0.38% Pb and 47.9 ppm Ag over 0.6 m. A chip sample across 2 m of silicified granite assayed 208 ppb Au.

The 1994 work was centred around a previously discovered north-trending structure located on Scout, however the 1994 sample map places the structure on the opposite (southwest) side of the claim. Regardless of the exact location of the structure, the assay results were similar to those recorded in 1989, with the best assay returning 279.3 g/T Ag, 0.42 % Cu, 1.47 % Pb and 1.37 % Zn (AR 093243). The NE and SW exposed limits of the main 040-trending shear are further obscured by talus and scree. Rushant recommended additional geochemical and geophysical surveys along strike, surveys which were never carried out.

Future Plans
Near future plans for the Rohan Property include an EM and magnetic airborne geophysical survey over the entire property area, a helicopter assisted detailed stream-silt survey, and follow-up prospecting and mapping programs with the intent of defining firm diamond drill targets.

Updated July 5, 2011

 Rohan Compilation Map 2011 [PDF]

Project News:

Feb 23, 2011- Rosedale Options Rohan

Jul 19, 2011- Geophysical Survey Commences