Fact Sheet for <b>Occurence 4619

					Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Occurence 4619 - 301 Trælhaug
	(Object Id: 7962) (Last updated: 10.10.2018)

Location

County:

Vestland

Municipality:

Eidfjord (4619)

Map 1:50000:

Eidfjord (1415-4)

Map 1:250000:

Odda

Coordinate system:

EU89-UTM Zone 32

(Coordinates NOT confirmed)

East:

399317 m.

North:

6703492 m.

Longitude:

7.1695820

Latitude:

60.4550680

Show on map

Resource

Resource Type:

Silica

Resource Subtype:

Quartzite

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Exploration	Reserves:
	Operating method:	Open pit mining	Historical production:

Mineralization

Genesis: Form:

Main texture: Min. distribution:

Main grain size:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Information(s) in free text format

Free text

The N-S elongated Trælhaug quartzite complex, which is 6 km long and up to 1 km wide, forms a the ridge of the Trælhaug at an altitude of 1000 to 1300 m a.s.l.. There is no road access to the location. It can be reached by a 8-km walk from the village Fossli at Vøringsfossen. During a NGU field campaign in 2005 rocks were sampled along E-W-striking and 1 km long traverse in the southern part of the quartzite body (see image). The band of coarse-grained greenish-bluish quartzite at the eastern contact of the complex, which is about 100 m wide, exhibits layering due to variations of minor feldspar and muscovite (3-10 vol.%) and accessory biotite and chlorite (samples 2708502, 2708503). Blue kyanite crystals are developed at some foliation planes. Towards the complex centre the quartzite becomes more and more heterogeneous and transforms to banded, fine- to medium grained quartzitic gneisses (sample 2708504) with pegmatitic schlieren of euhedral feldspar. The gneisses are partially migmatitic. Towards the western contact of the complex the gneisses changes gradually to relative pure quartzite, which forma a 100-m wide band along the western contact (sample 2708506). The Al2O3 content of the Trælhaug quartzites is generally >1 wt.% and, therefore, they are not a suitable raw material for FeSi and MnSi production. However, the relative pure, 100-m wide quartzite band at the western contact has partially less than 0.5 wt.% Al2O3. The Ti concentration of quartz in the quartzites is high (30 to 65 ppm) which defines the quartz as low quality raw material in the micro chemical sense. Al in quartz varies between 50 and 200 ppm, Li between 0.6 and 1.5 ppm and Fe between 2 and 12 ppm.

Photo(s) from the Deposit area:

Photo no. 1 showing Trælhaug quartzite complex"

Photo no. 2 showing Geology of the Trælhaug quartzite"

Photo no. 3 showing thin section photograph"

Bibliography:

From NGU's Reference Archive:

Jorde, Knut , 1977

Kvartsforekomster, 1415 IV Eidfjord

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 6491;3+kart pages

Abstract:

Det er påvist en rekke forekomster av kvarts og kvartsrik gneis (=kvartsitt), 4 større og 9 mindre. Det meste er hydrotermalkvarts i granitt og migmatitt. Forekomsten ved Trælhaug er kjent som kvartsitt, men i tillegg trekkes Viv- heller, Urhovden og Veanuten fram. Lokalitetene går godt fram av koordinater og kart.

Fieldsamples

Sample No. Sample type Miscellanrous

2708502 Bedrock

Sampler: Muller/...Stored: NGU

Comment: quartzite at 32V0399895 6702572

No. of registrated element analyses = 1

No. of registrated mineral analyses = 1

No. of registrated oxide analyses = 1

2708503 Bedrock

Sampler: Muller/...Stored: NGU

Comment: quartzitic gneiss at 32V0399767 6702410

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

2708504 Bedrock

Sampler: Muller/...Stored: NGU

Comment: quartzitic gneiss at 32V0399457 6702620

2708505 Bedrock

Sampler: Muller/...Stored: NGU

Comment: quartzite at 32V0399176 6702728

No. of registrated element analyses = 1

No. of registrated mineral analyses = 2

No. of registrated oxide analyses = 1

2708506 Bedrock

Sampler: Muller/...Stored: NGU

Comment: quartzite at 32V0398926 6702841

No. of registrated element analyses = 1

No. of registrated mineral analyses = 2

No. of registrated oxide analyses = 1

NB! All analyse values are shown at the end of the printout.:

Analyse Results

from

Deposit Area 4619 - 301 Trælhaug

Element analyses
( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)

Sample No. Sample Type Cu* Zn* Pb* Co* Ni* As* Ba*

2708502 Bedrock -10 9 -10 6 -5 -5 165

2708503 Bedrock -10 8 -10 8 -5 -5 89

2708505 Bedrock -10 10 -10 6 -5 -5 74

2708506 Bedrock -10 8 -10 7 -5 -5 59

------------------

Sample No. Mo* Sn* Sb* Ga* V* Cr* Th* U* W*

2708502 -5.00 -10 -10 -10.00 -10 14 12.00 -10.00 26

2708503 -5.00 -10 -10 -10.00 20 19 9.00 -10.00 24

2708505 -5.00 -10 -10 -10.00 10 -10 13.00 -10.00 21

2708506 -5.00 -10 -10 -10.00 -10 -10 10.00 -10.00 17

------------------

Sample No. Rb* Sr* Y* Zr* Nb* Ta* Cs* La* Ce*

2708502 16.0 22.0 5.0 87 -5.00 -10.00 11.00 -10.00 11.00

2708503 35.0 37.0 -5.0 151 7.00 -10.00 -10.00 -10.00 -10.00

2708505 18.0 6.0 -5.0 67 -5.00 -10.00 -10.00 -10.00 11.00

2708506 12.0 -5.0 -5.0 77 -5.00 -10.00 -10.00 -10.00 -10.00

------------------

Sample No. Pr* Nd* Yb* Sc* Hf*

2708502 -10.00 -10.00 -15.00 -10.00 -10.00

2708503 -10.00 -10.00 -15.00 -10.00 -10.00

2708505 -10.00 -10.00 -15.00 -10.00 -10.00

2708506 -10.00 -10.00 -15.00 -10.00 -10.00

Mineral analyses
( All values are in ppm. Negative values means below detection limit value.)

Sample No. Sample Type Mineral Li Be B

2708502 Bedrock Quartz 1.200 -.100 1.300

2708505 Bedrock Quartz .600 .200 1.100

2708505 Bedrock Quartz .800 .100 .900

2708506 Bedrock Quartz 1.400 -.100 .900

2708506 Bedrock Quartz 1.500 -.100 .600

------------------

Sample No. Na Al P K Ti Fe Ge

2708502 -22.000 121.500 -6.000 11.300 33.800 2.200 .900

2708505 23.000 186.200 8.600 5.600 55.700 12.300 .700

2708505 -22.000 157.000 -6.000 27.800 56.400 10.800 .800

2708506 -22.000 50.900 -6.000 21.900 62.200 5.900 .700

2708506 -22.000 51.700 -6.000 31.600 61.500 10.800 .700

Oxide analyses
( All values are in % )

Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO

2708502 Bedrock 93.90 4.02 0.07 0.52 -0.01 -0.01 0.04

2708503 Bedrock 90.65 5.82 0.17 0.97 -0.01 -0.01 0.00

2708505 Bedrock 96.69 1.98 0.09 0.39 -0.01 -0.01 0.00

2708506 Bedrock 98.91 0.38 0.08 0.24 -0.01 0.03 0.01

------------------

Sample No. Na2O K2O P2O5 Loss Sum

2708502 0.17 0.41 -0.01 0.50 100.00

2708503 0.12 1.08 -0.01 0.79 100.00

2708505 0.00 0.44 -0.01 0.35 100.00

2708506 0.00 0.16 -0.01 0.15 100.00

	Genesis:		Form:
	Main texture:		Min. distribution:

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex:

	Abstract:
	Det er påvist en rekke forekomster av kvarts og kvartsrik gneis (=kvartsitt), 4 større og 9 mindre. Det meste er hydrotermalkvarts i granitt og migmatitt. Forekomsten ved Trælhaug er kjent som kvartsitt, men i tillegg trekkes Viv- heller, Urhovden og Veanuten fram. Lokalitetene går godt fram av koordinater og kart.

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	As*	Ba*
2708502	Bedrock	-10	9	-10	6	-5	-5	165
2708503	Bedrock	-10	8	-10	8	-5	-5	89
2708505	Bedrock	-10	10	-10	6	-5	-5	74
2708506	Bedrock	-10	8	-10	7	-5	-5	59

Sample No.	Mo*	Sn*	Sb*	Ga*	V*	Cr*	Th*	U*	W*
2708502	-5.00	-10	-10	-10.00	-10	14	12.00	-10.00	26
2708503	-5.00	-10	-10	-10.00	20	19	9.00	-10.00	24
2708505	-5.00	-10	-10	-10.00	10	-10	13.00	-10.00	21
2708506	-5.00	-10	-10	-10.00	-10	-10	10.00	-10.00	17

Sample No.	Rb*	Sr*	Y*	Zr*	Nb*	Ta*	Cs*	La*	Ce*
2708502	16.0	22.0	5.0	87	-5.00	-10.00	11.00	-10.00	11.00
2708503	35.0	37.0	-5.0	151	7.00	-10.00	-10.00	-10.00	-10.00
2708505	18.0	6.0	-5.0	67	-5.00	-10.00	-10.00	-10.00	11.00
2708506	12.0	-5.0	-5.0	77	-5.00	-10.00	-10.00	-10.00	-10.00

Sample No.	Sample Type	Mineral	Li	Be	B
2708502	Bedrock	Quartz	1.200	-.100	1.300
2708505	Bedrock	Quartz	.600	.200	1.100
2708505	Bedrock	Quartz	.800	.100	.900
2708506	Bedrock	Quartz	1.400	-.100	.900
2708506	Bedrock	Quartz	1.500	-.100	.600

Sample No.	Na	Al	P	K	Ti	Fe	Ge
2708502	-22.000	121.500	-6.000	11.300	33.800	2.200	.900
2708505	23.000	186.200	8.600	5.600	55.700	12.300	.700
2708505	-22.000	157.000	-6.000	27.800	56.400	10.800	.800
2708506	-22.000	50.900	-6.000	21.900	62.200	5.900	.700
2708506	-22.000	51.700	-6.000	31.600	61.500	10.800	.700

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
2708502	Bedrock	93.90	4.02	0.07	0.52	-0.01	-0.01	0.04
2708503	Bedrock	90.65	5.82	0.17	0.97	-0.01	-0.01	0.00
2708505	Bedrock	96.69	1.98	0.09	0.39	-0.01	-0.01	0.00
2708506	Bedrock	98.91	0.38	0.08	0.24	-0.01	0.03	0.01

Sample No.	Na2O	K2O	P2O5	Loss	Sum
2708502	0.17	0.41	-0.01	0.50	100.00
2708503	0.12	1.08	-0.01	0.79	100.00
2708505	0.00	0.44	-0.01	0.35	100.00
2708506	0.00	0.16	-0.01	0.15	100.00