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File Created: 19-Nov-1991 by Ian Webster (ICLW)
Last Edit:  20-Oct-2021 by George Owsiacki (GO)

Summary Help Help

NMI
Name DAYBREAK Mining Division Atlin
BCGS Map 104N074
Status Showing NTS Map 104N11W
Latitude 059º 42' 39'' UTM 08 (NAD 83)
Longitude 133º 18' 47'' Northing 6620415
Easting 594907
Commodities Tin, Zinc Deposit Types K06 : Sn skarn
K03 : Fe skarn
Tectonic Belt Intermontane Terrane Cache Creek, Plutonic Rocks
Capsule Geology

The Daybreak occurrence was discovered by an Atlin prospector, Mr. W. Wallis, and is of interest because it includes ribbon banded "wrigglite" skarn. It is situated at an elevation of 1550 to 1600 metres, east of Ruby Creek, about 27 kilometres northeast of the community of Atlin. The Atlin Magnetite skarn (104N 126) is located 990 metres to the north of the Daybreak showing.

The area is underlain by altered greenstone, schistose hornfelsic metasediment and minor mafic tuff and marble of the Mississippian to Triassic Cache Creek Complex. These are intruded by several large irregular sills and dikes of leucocratic quartz monzonite that are cut by narrow quartz veins, some of which carry minor fluorite. The sills and dikes are probably related to the nearby satellite stock of the Late Cretaceous Surprise Lake batholith (Surprise Lake Plutonic Suite).

West and southwest of the occurrence there is a large area of garnet-pyroxene-biotite exoskarn, with lesser amounts of unaltered intrusive rock. This skarn contains layers and irregular veins, up to 0.3 metres thick, of orange-red garnet and green pyroxene that cut a schistose biotite hornfels. The eastern end of the skarn is covered scree that contains numerous large boulders of layered wrigglite skarn. Wrigglite was not seen in outcrop but some of the float represents frost-heaved boulders, suggesting that it subcrops in the immediate vicinity.

The wrigglite skarn is characterized by thin, rhythmic mineral layering; each layer is either green, brown or black, depending upon the quantity of fluorite, vesuvianite, garnet or magnetite present; these are lined with elongated crystals of green clinozoisite. Microprobe and x-ray diffraction studies by the Geological Survey of Canada (S.B. Ballantyne, personal communication, 1991) indicate the wrigglite contains gahnite and trace cassiterite, and is enriched in beryllium. No beryl has yet been identified, and it is likely that much of the beryllium is contained as a non-essential element within the vesuvianite and garnet.

The term "wrigglite" to describe rhythmically layered skarn was first used by Askins (1976) and later by Kwak and Askins (1981) although the texture has been recognized since the early part of this century. Kwak (1987) discusses the origin or wrigglite textures and notes it is a characteristic of iron and fluorine-rich tin skarns, most of which contain fluorine in excess of 9 per cent by volume. Wrigglite skarns are commonly associated with fault structures, unlike most tin skarns which generally form at deep levels, they are believed to develop in relatively near-surface conditions such as over the cupolas of high-level granites (Kwak, 1987). Thus, its presence in the fluorine-beryllium-tin skarn assemblages at both the Daybreak and Silver Diamond (104N 069) occurrences are characteristic of highly evolved granitic melts derived from continental crust. This indicates the oceanic Cache Creek Terrane may be underlain by continental basement in the Atlin area (Fieldwork, 1991).

In 2002, prospection was done by William B Wallis on the B&B and B&W 1&2 claims, who is the owner of these claims as well.

In 2017, Global Drilling Solutions on behalf of Zinex Mining Corporation conducted extensive geochemical sampling on the Ruby Creek property, as well as drilling and ground geophysics. In 2018, Global carried out further geochemical sampling on the property, and in 2019 they continued work in this region, in the form of prospection, geochemical surveying and a ground geophysical survey.

In 2021, an airborne SkyTEM survey was conducted by Stuhini Exploration on the Ruby Creek property, which revealed a number of regional trends across the property.

Bibliography
EMPR ASS RPT 26920, 37171, 38256, 39048, 39553
EMPR BULL 94
EMPR FIELDWORK *1991, pp. 241-242
EMPR OF 1989-15; 1989-24; 1992-16; 1996-11; 1998-8-M, pp. 1-74
GSC MAP 1082A
GSC MEM 307
GSC OF 864
GSC P 74-47
PERS COMM S.B. Ballantyne, GSC, 1991

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