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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  16-Feb-1989 by David G. Bailey (DGB)

Summary Help Help

NMI 093K14 Gem2
BCGS Map 093K093
Status Past Producer NTS Map 093K14W
Latitude 054º 58' 03'' UTM 10 (NAD 83)
Longitude 125º 26' 47'' Northing 6093913
Easting 343398
Commodities Jade/Nephrite, Gemstones Deposit Types Q01 : Jade
Tectonic Belt Intermontane Terrane Cache Creek
Capsule Geology

The Genesis deposit is located on O'Ne-ell Creek, 6.4 kilometres upstream from Middle River. It was first discovered in 1968 by Ms. W. Robertson, who traced jade boulders to the in situ nephrite outcrop.

The geology of the region consists of: 1) a Mississippian to Triassic Cache Creek Group oceanic volcanic and sedimentary assemblage 2) the Upper Triassic dominantly mafic volcanic Takla Group 3) the Lower to Middle Jurassic Hazelton Group mafic to felsic volcanic and sedimentary rocks 4) the Upper Cretaceous to Lower Tertiary Ootsa Lake Group sedimentary and volcanic rocks and 5) the Oligocene and Miocene Endako Group. The region has been intruded by the Lower Jurassic quartz monzonite to granodiorite Topley Intrusive Suite, Upper Jurassic plutons of the Francois Lake Suite and plugs and stocks related to Upper Cretaceous and Tertiary volcanism. Ultramafic bodies of probable ophiolitic affinity, related to the oceanic Cache Creek assemblage, occur within the Cache Creek Terrane and adjacent to the Pinchi fault. These ultramafics, referred to as the Trembleur Intrusions are probably pre-Upper Triassic in age.

The Genesis deposit occurs along the contact between Trembleur Intrusive serpentinite and quartz monzonite of the Topley Intrusive Suite. It comprises lenses of nephrite, massive tremolite, and foliated tremolite-talc-chlorite rock within a structurally complex contact zone between serpentinite and an overlying assemblage of metasedimentary and metavolcanic rocks that includes chert, quartzite, greenstone, slate and sandstone. The metasedimentary and metavolcanic rocks are inferred to be a tectonic inclusion within the ultramafic unit, although it is possibly that they represent part of the structurally overlying North Arm succession.

In 1968, 34.2 tonnes of jade was reportedly shipped out by helicopter. Shipments were also reported for 1969 and 1970. In 1968, reserves were estimated at 900 tonnes in boulders and 45,000 tonnes in open cliff faces (National Mineral Inventory card 093K14 Gem2).

In 1995, Global Metals Ltd. drilled 29 shallow holes in the O'Ne-ell Creek area. Within the area surveyed, an estimated 2.8 million kilograms of nephrite jade and tremolite exists. Further potential south of the river and to the north is indicated (Information Circular 1996-1, page 21).

EM OF 1999-11
EMPR AR 1968-309
EMPR EXPL 1992-69-106
EMPR FIELDWORK 1992, pp. 475-482; 1998, pp. 33-68
EMPR GEM 1969-389; 1970-A21,498
EMPR INF CIRC 1996-1, p. 21
EMPR PF (Dept. of Mines Summary of Exploration and Development work, 1968; Claim Map Genesis Group 1969; See 093K General file, Endako Area Maps; Fraser, Marilyn (Summer/Fall 2000): The Jade Mines of B.C., Vol. 4, No. 2, 5 pages)
EMR MP CORPFILE (Athabasca Columbia Resources Ltd.; Jade Queen Mines Ltd.)
GSC MAP 631A; 907A; 1424A
GSC OF 2593, 3183
GSC P 72-53, pp. 44,45,48; 90-1F, pp. 115-120; 91-1A, pp. 7-13
Fraser, J.R.C. (1972): Nephrite in British Columbia; unpublished M.Sc. Thesis, University of British Columbia, 144 pages