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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  28-Feb-2008 by Karl A. Flower (KAF)

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NMI 082L4 Cr1
Name CHROME-VANADIUM, HORNE, CHROME RIDGE, ALOCIN CHROME, ROC, NAN-ROC, CV Mining Division Nicola
BCGS Map 082L001
Status Prospect NTS Map 082L04W
Latitude 050º 00' 26'' UTM 11 (NAD 83)
Longitude 119º 51' 59'' Northing 5543371
Easting 294620
Commodities Chromium Deposit Types M03 : Podiform chromite
Tectonic Belt Intermontane Terrane Okanagan
Capsule Geology

The Chrome-Vanadium showings are located 33 kilometres west- northwest of Kelowna, south of Alocin Creek. The showings are on top of a prominent northwest trending ridge. The Cameo Lake showings are located 1600 metres to the southeast in 082E16W.

In this area, Devonian to Triassic volcanic and sedimentary rocks of the Harper Ranch Group and the Permian and older Chapperon Group are unconformably overlain by Upper Triassic to Lower Jurassic Nicola Group sedimentary and volcanic rocks. These are intruded by Middle Jurassic granitic rocks of the informally named Terrace Creek batholith. Extensive Eocene Kamloops Group volcanic and sedimentary rocks overlie the older units.

Serpentinized harzburgite in pelitic and volcanic rocks of the Chapperon Group hosts chromite and magnetite mineralization. This unit is likely a fault bounded remnant of lower crustal oceanic rocks. The unit, striking 150 degrees and dipping 85 degrees east has been traced for 9 kilometres. The pelitic rocks comprise phyllite, greenstone and mica schist.

Chromite occurs as closely spaced "kidneys", 1 to 3 centimetres in diameter, and as heavy disseminations of small angular aggregates. Several small lenses, containing 25 to 75 per cent chromite and up to 0.2 by 0.3 metres in area, are also present at the Alocin and Cameo Lake showings. Serpentine alteration is common, with lesser talc and chrysotile. Relict orthopyroxene indicates that the protolith was harzburgite. Sampling of high grade chromite pods averaged 28 per cent chromite (Assessment Report 6775). Heavy mineral sampling of stream sediments indicates the likely presence of gold and platinum mineralization.

The showings were initially staked as the Chrome-Vanadium group and prospected in the late 1920s by A.H. Raymer and Associates. Later, in the 1930s, the Chrome Ridge Mining Syndicate held claims that covered the better part of the serpentinite containing chromite mineralization. During that time a small amount of hand trenching, sampling and prospecting was done. In 1956, Noranda Exploration Company Ltd. did an extensive geological mapping, sampling, prospecting and aeromagnetic surveys of the area. By 1977, Nicola Copper Mines Ltd. and Buccaneer Resources Ltd. did further geological mapping, ground magnetometer surveys, soil sampling and trenching. At that time the Alocin and Cameo Lake showings were named. In 1986, the Laramie Mining Corp. collected heavy mineral samples. The showings are presently covered by the Jack 5 claim, owned by Rea Gold Corp.

Northwest along strike, prospecting on the Bart claims of Mineta Resources Ltd. has outlined the extension of the serpentinite and further probable chromite mineralization (W. Kovacevic, personal communication, 1990).

Bibliography
EMPR AR 1929-210,249
EMPR ASS RPT 168, *6775, 15233
EMPR BULL (*Stevenson, J.S. (1941): unpublished report)
EMPR EXPL 1986-C100
EMPR FIELDWORK 1987, pp. 55-58; 1988, pp. 355-363
EMPR GEM 1977-E79
EMPR MAP 5207G, 7216G
EMPR MEIP 78/79 (Report on Chromite Potential, Nana-Roc Mineral
Claims, Cameo Lake, Kelowna, Von Rosen, G. Jun.28, 1977; Report
on Drilling, Blasting and Trenching Roc Mineral claim, Crosby,
R., Dec. 1978; Report on Mag.Survey and Grid Location Plenty,
Host, Zip Mineral claims, Crosby, Richard & Assoc. Dec. 1978)
EMPR OF *1988-19, pp. 23, 25, 27, 96, 97; 1989-5; 1990-27, pp. 18,
19; 1990-30; 1995-25
EMPR P 1991-4, p. 132
EMPR PF (In 082LSW General - Claim Map, 1966; Crosby, R.D. (1978-12-01): Report on Magnetic Survey and Grid Location over the Plenty, Host and Zip Mineral Claims)
EMPR RGS 1976
GSC MAP 46-7, 1059A, 1712A
GSC MEM 296, pp. 143, 145
GSC OF 637 (Map C), 736, 2167
GSC P 89-1E pp. 51-60
GSC SUM RPT *1931A, pp. 94-95
GCNL #147, #212, 1977; #118, 1978
Whittaker, P. (1983): *Geology & Petrogenesis of Chromite and Chrome
Spinel in Alpine-type Peridotites of the Cache Creek Group;
unpublished Ph.D. Thesis, Carleton University

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