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File Created: 10-Sep-1985 by Tom G. Schroeter (TGS)
Last Edit:  14-Oct-2021 by George Owsiacki (GO)

Summary Help Help

NMI
Name ANNA, HELI, HEART OF GOLD Mining Division Atlin
BCGS Map 104N052
Status Showing NTS Map 104N12E
Latitude 059º 32' 59'' UTM 08 (NAD 83)
Longitude 133º 37' 06'' Northing 6602078
Easting 578107
Commodities Gold, Silver Deposit Types I01 : Au-quartz veins
Tectonic Belt Intermontane Terrane Plutonic Rocks, Cache Creek
Capsule Geology

The Anna occurrence is located near the top of Monarch Mountain about 5 kilometres southeast of the community of Atlin.

The showing is situated in an area underlain by serpentinized peridotite of the upper Mississippian to Permian Cache Creek Complex. These rocks are spatially related to the Mississippian to Triassic Cache Creek Complex and Monger (Geological Survey of Canada Paper 74-47) believes that they may be genetically related as well. The showings occur where these ultramafics have undergone a severe deformation and alteration associated with faulted, crumpled or brecciated zones. These rocks are highly altered (listwanitic) schistose ultramafics composed of talc, magnesite, siderite, quartz, chalcedony, mariposite, chromite and pyrite. A shear zone adjacent to this altered zone has been intruded by basaltic lavas. A granitic dike approximately 10 metres thick is also reported. Rocks adjacent to this dike have similar talc-carbonate type alteration. Quartz veins cut the contacts of dike. A similar northeast trending, steeply dipping fault zone with listwanitic alteration hosts the Gold Star showing (104N 091) located 6.3 kilometres northwest.

Quartz veins up to 0.5 metre thick cut these altered ultramafic rocks and are reported to have a trend of 130 degrees with vertical dips. In 1984, a sample of "quartz vein talc and/or carbonate-bearing rocks" yielded values of 1.75 grams per tonne gold and 19.58 grams per tonne silver (Assessment Report 12385).

In 1983-84, owner/operator B. Lueck conducted prospecting on the Anna 1-8 claims.

Bibliography
EMPR ASS RPT *12385, 17768, *17997, 31064, 31232
EMPR BULL 94; 108, pp. 19-20, 22, 24, 133
EMPR EXPL 1984-405
EMPR PF (Canova Resources: Filing Statement, 1987)
EMPR OF 1989-15, 24; 1990-22; 1996-11
EMPR GEOS MAP 2004-4
GSC MAP 1082A; 1418A
GSC MEM 307
GSC P 74-47
GSC OF 864
*Lueck, B.A. (1985): Geology of Carbonatized Fault Zones on the Anna Claims and their Relationship to Gold Deposits, B.Sc. Thesis, University of British Columbia

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