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 Nova Scotia Minerals: Columbitespacer

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COLUMBITE

(Fe, Mn, Mg)(Nb, Ta)2O6
Iron Manganese Magnesium Niobium Tantalum Oxide

Keddy Mo, Nb, Ta Pegmatite, Lunenburg County
UTM (NAD27)
Zone 20
 Northing 4952320
 Easting 381500
Details:

 The Keddy Pegmatite, also referred to as the Lantz Pegmatite, is found southwest of the village of New Ross, Lunenburg County on the west side of the Larder River. The Larder River flows from Lake Ramsey to the Gold River and crosses under the New Ross to Forties Road about 3.8 km west of New Ross. The pegmatite is found about 2.4 km south of the Forties Road. The Keddy Pegmatite is accessible by three routes: (1) originally the site was accessed via a woods road leading south from Keddy Hill at Forties (O'Reilly et al., 1982), but more recent logging and Christmas tree farming in the area has resulted in easier access; (2) Perhaps the best way to access the prospect is via a Christmas tree farm found on the north side of the Meister Road, which leads west from Lake Darling at New Ross. This farm passes to within a couple of hundred metres of the east bank of the Larder River immediately opposite the prospect. Permission to pass through the Christmas tree farm must first be obtained. One must also cross the Larder River but this is easily done at most times of the year except for the spring when water level is at it's highest; (3) a recent (circa. 1992) high quality (i.e. passable by car) logging road leads from the Forties Road at Forties and passes along the top of the hill found a few hundred metres west of the prosect. Taking this route means that on parking their vehicle, one must only walk through the woods and down the slope to the prospect. However, the logging road is usually gated and permission must be obtained for entrance.

References:
 NSMOD #A09-013
Further Info:

 A few flakes of molybdenite were observed in dump samples of the greisenized leucomonzogranite by O'Reilly et al. (1982). Other minerals identified in the greisen and pegmatite include: topaz, dumortierite, dickite, fluorite, columbite or tantalite, scheelite and wolframite. Molybdenite, in 2.5 cm rosettes, occurs in an aplitic leucogranite in the central portion of the prospect. Cameron (1950) indicates the quartz pegmatite dyke at the the south end of the prospect contains flakes of molybdenite and a radioactive mineral but these were not observed by O'Reilly et al. (1982).
The prospect was discovered in 1890 at which time two test pits were dug. Faribault (1924) indicates two pegmatite dykes at this site on his geology map and reports that molybdenite occurs in both.

Other Minerals:
 molybdenite, wolframite, scheelite, fluorite, topaz, dumortierite, tantalite

Brazil Lake Li, Ta, Sn Pegmatite, Yarmouth County
UTM (NAD27)
Zone 20
 Northing 4874957
 Easting 260061
Details:

 Travel northeast from Yarmouth along Highway 340 towards the community of Carleton, Yarmouth County. Approximately 0.5 km south of where the Pleasant Valley Road intersects the highway, turn left (north) onto the gravel Holly Road. Travel northwest along Holly Road for 2.2 km. At that point you will note a skid road leading north from the Holly Road. This skid road was constructed for the Nova Scotia Department of Natural Resources diamond-drilling of the prospect. The pegmatite outcrops that comprise the prospect are located in the woods on both sides of the Holly Road. The diamond-drill skid road leads north for a couple of hundred metres and ends immediately west of one of the pegmatite outcrops. At a point about halfway between this outcrop and the Holly Road is a second outcrop of pegmatite.

References:
 NSMOD #P13-001
Further Info:

 The Brazil Lake Pegmatite is characterized by the presence of very large spodumene crystals (<60cm), and an accessory mineral assemblage which includes; tourmaline, apatite, cassiterite, wolframite, zircon, columbite/tantalite, epidote and very minor lithiophilite (Li(Mn,Fe)PO4), fillowite, amblygonite/montebrasite and cookeite (Hughes, 1995). Although small, dark green beryl crystals were reported to occur within the pegmatite (Hutchinson, 1982), no beryl was identified by Corey (1995) or Hughes (1995) during their investigations. However, abundant dark green tourmaline crystals do occur and may have been mistaken for beryl.

Other Minerals:
 spodumene, erythrite, feldspar, tantalite, tourmaline, molybdenite, cassiterite, lithiophilite, fillowite, amblygonite

Reeves Tin Pit, Lunenburg County
UTM (NAD27)
Zone 20
 Northing 4953870
 Easting 379700
Details:

 The Reeves Tin Pit is located 5.1 km west on the Dalhousie Road (Forties Road) from the village of New Ross, Lunenburg County. The prospect is found within the community of Forties and 0.5 km south of road on the Reeves farm. Reeves is a common name in the New Ross area. The prospect may be reached by going 80 metres south along a woods road that starts at a small man-made pond behind the barn on the Reeve's farm. At that point turn west from the woods road onto a foot path and walk southwest for 120 m to a cleared area. The prospect is located in this cleared area and in 1982 consisted of a water-filled pit, outcrops and overburden dumps (O'Reilly et al., 1982). Since 1982 the pit has been filled in by the land owner but dump material can be found laying about.

References:
NSMOD #A10-004
Further Info:

 Mineralization: Flecks of fluorite and blue-turquoise fluorapatite are common in the pegmatite and associated leucogranite that accompanies the pegmatite. The mineral assemblage that is reported to occur in the central zone of the pegmatite is impressive and includes: cassiterite, amblygonite, lepidolite, fluorite, topaz, tourmaline, beryl, wolframite, scheelite, columbite, durangite, metatorbenite, tapiolite and monazite. A Department of Mines and Energy field check reported in 1982 indicates that most of these minerals are not obvious and only fluorite, lepidolite and fluorapatite were noted (O'Reilly, et al., 1982).

Faribault (1908) reported that a pit was dug in 1903, uncovering cassiterite- and fluorite-bearing quartz boulders. Consequently, digging continued and a shaft was sunk into bedrock with work continuing for the next few years. A pit was sunk (7.5 m deep, 3.6 m long and 3 m wide) on a pegmatitic segregation within light grey leucogranite. The site has been visited by numerous persons since Faribault's time but the dyke was apparently not visible due to the water level in the pit and the fact that much of the outcrop had since been covered over by dump material.

Other Minerals:
  amblygonite, microlite, monazite, morinite, scheelite, tapiolite, topaz, tourmaline, triphylite, tungstite, wolframite, apatite, fluorapatite, beryl, cassiterite, durangite, fluorite, lepidolite, metatorbernite

Location
UTM (NAD27)
Zone 20
 Northing 0000000
 Easting 000000
Details:
 Description
References:
 #####
Further Info:
 ?????
Other Minerals:
 Add'l Mineralization




 

 Cleavage: good in one direction

 Colour: dark black, iron-black to dark brown

 Fracture: subconchoidal

 Hardness: 6

 Luster: submetallic

 Streak: brown to black

 Possible Useage: niobium ore and tantalum, mineral specimen

 More Info: Mineral Gallery, Mineralogy Database

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