Work History

The occurrence was first explored by Hudson Bay Mining and Smelting Company Ltd which carried out a large exploration program in the area around 1947. The occurrence was reportedly drilled but no work records pertaining to this occurrence have survived.
Staked as Mod cl 1-4 (86917) in Mar/63 by E. Erickson and A. Riba who optioned them in Jul/68 to Trans Yukon Exploration Ltd who in turn, optioned them to Boswell River Mines Ltd. Boswell River explored the claims from Sep/68 to mid-1969 before dropping the option. Erickson and Riba trenched in 1979 and 1980. W.L. Huntsman staked Joan cl (Y13559) two miles south in Aug/66.
The Mod group was fringe staked as Scarn cl (YA33769) in Jul/78 by A. Racicot, on behalf of a syndicate composed of Placer Development Ltd & Asamera Oil Corporation Ltd; Road cl 1-44 (YA54877) to the east in Jun/80 by D.C. Syndicate (Cominco Ltd & Dome Petroleum Ltd), which performed mapping and geochem sampling in 1980, 1981 and 1982; Mas cl 1-1VX (YA71514) to the south and east in Aug/84 by A. Sahacic; Silver Fox cl 1-14 (YA90501) to the west in Nov/85 by J. Ruza; Dart cl 1-100 (YB376) in Jun/87 by Apex Energy Corporation; and Bound cl 1-36 (YB15809) to the east, north and west in Aug/89 by H. Hibbing.
Hibbing also tied on the Strata cl 1-42 (YB15595) and Tanis cl 1-50 (YB16408) claims to the south in 1990 and trenched on the Strata 16 claim immediately southwest of the Mod showing. Hibbing performed road work on the Tanis 1-3 and 14 cl in Sep/92, and road building on the Tanis 2, 3, 16, 17, 29 and 30 cl in Aug/93.
In Jul/96 the Mod cl 1-4 (86917) were transferred from the estate of Tony Riba to Henry Regehr. In Sep/97 S. Secerbegovic surrounded the Mod claims with Bond cl 1-36 (YB89935). Harding and Secerbegovic carried out detailed geological mapping on the Tanis, Bound and Bond claims in 1997, 1998 and 2000.

Capsule Geology

The area is located 18 km north of the Yukon-British Columbia border, northeast of Swift River, Yukon. The occurrence lies about 1.5 km south of the Late Permian Ram stock and less than 3 km northeast of the mid-Cretaceous Seagull Batholith. Detailed mapping by T. Liverton employed by Hibbing and Secerbegovic shows that the area is underlain by Lower, Intermediate and Upper siliclastic units separated by metavolcanic and marble units. The marble unit and metavolcanic units can be traced intermittently across the length of the TBMB, Bound/Bond and Mod claims The siliclastic rocks likely belong to the Swift River Succession, (pre-late Mississippian) and the metavolvanic unit likely belongs to the overlying Klinkit Succession. The origin of the marble unit is presently uncertain. All three units are believed to be part of the Yukon Tanana terrane.
The occurrence consists of a zone of massive black sphalerite, pyrrhotite and galena 2 to 4 m wide and 80 to 100 m long. The sulphides occur in actinolite skarn within a carbonate lens up to 50 m thick that forms part of a Permian to Carboniferous metasedimentary sequence. Traces of scheelite and tin minerals are also present. The showing closely resembles the neighboring Munson occurrence (Minfile Occurrence #105B 029) located 1.5 km to the west.
On the adjoining Road group, The D.C. Syndicate reported low tin values associated with a garnet-magnetite skarn zone located within the Seagull Batholith. During Apex Energy Corporation¿s exploration of the Dart claims, reference was made to the Mod occurrence and the fact the mineralization appeared to be similar to the neighboring Munson occurrence
The detailed mapping by Liverton outlined the deformation history of the area and the limits of the marble and metavolcanic units. Liverton believes that the mineralization present at the Mod and TRMB (Munson occurrence, Minfile Occurrence #105B 029) is similar to that seen to the north at the Dan occurrence (Bar occurrence Minfile Occurrence #105B 027) and all the mineralization is hosted by the same stratigraphic unit, meaning the Ram Creek assemblage extends further south than shown on current geological maps. Roots (NATMAP) believes that the mineralization is similar but the mineralization presnt at the Mod occurrence occurs at least 1 km higher in the structural succession. Liverton also suggests the the mineralization is volcanogenic massive sulphide while Roots feels that evidence proving either epigenetic skarn or skarnified syngenetic (possibly volcanic-associated) mineralization is unclear.

References

DC SYNDICATE, 1980. Assessment Report *#090921 by J.C. Stephen.

DC SYNDICATE, 1981. Assessment Report *#090798 by J.C. Stephen, N. Stephanian and P. Philips.

D¿EL-REY Silva, L.J.H., LIVERTON, T., ROOTS, C., PARADIS, S., 2001. A structural analysis of the upper Swift River area, southeastern Yukon (105B/3), Part II: The TRMB claims and implications for the regional geology. In: Yukon Exploration and Geology 2000, D.S.Emond and L.H. Weston (eds.), Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 301-310.

FIRST YUKON SILVER RESOURCES LTD., Feb/98. Assessment Report #093758 by T. Liverton.

FIRST YUKON SILVER RESOURCES LTD., Mar/99. Assessment Report #093954 by T. Liverton.

FIRST YUKON SILVER RESOURCES LTD., Feb/2001. Assessment Report #094196 by T. Liverton and Luiz J.H. D¿el-Rey Silva.

GEOLOGICAL SURVEY OF CANADA Paper 79-1A, p. 259-266.

GEOLOGICAL SURVEY OF CANADA Paper 66-31, p. 76-79.

GEOLOGICAL SURVEY OF CANADA Paper 78-1A, p. 291.

GOWER, J.A., 1952. The Seagull Creek Batholith and its metamorphic aureole. Unpublished M.A.Sc. thesis, University of British Columbia, p. 28-30.

HARMS T.A. AND STEVENS, R.A. 1995. Investigations in the Dorsey terrane, Part 2: lithologies and structure of (?) Paleozoic stratified rocks in the Stikine Ranges, northern British Columbia; in Current Research 1995-A; Geological Survey of Canada, p. 129-133.

MORTENSEN, J.K. AND GABITES, J. E., 2002. Lead Isotopes constraints on the metallogeny of southern Wolf Lake, southeastern Teslin and northern Jennings River map areas, Yukon and British Columbia: Preliminary results. In: Yukon Exploration and Geology 2001, D.S. Emond, L.H. Weston and L.L.. Lewis (eds.), Exploration and Geological Services Division, Yukon Region, Indian and Northern Affairs Canada, p. 179-188.

NELSON, J.L., ROOTS, C. HARMS, T., 2001. Ram Creek and Dorsey assemblages, Swift River succession, Screw Creek limestone, Klinkit and Teh successions. In: Unpublished 2001 NATMAP Field Trip Guidebook, 74 p.

ROOTS, C.F. ET AL., 2000. Revision mapping of the Yukon Tanana and equivalent terranes in Northern British Columbia and southern Yukon Territory between 1310 and 1320 W; Geological Survey of Canada, Current Research 2000-A4, 10p.

STEVENS, R.A. AND HARMS, T.A., Investigations in the Dorsey terrane, Part 1: stratigraphy, structure, and metamorphism in the Dorsey Range, southern Yukon Territory and northern British Columbia, in Current Research 1995-A; Geological Survey of Canada, p. 117-127.

YUKON EXPLORATION AND GEOLOGY 1981, p. 98; 1982, p. 96; 1997, p. 20, 37-38; 1998, p. 20.

YUKON GEOLOGY AND EXPLORATION 1979-80, p. 145