Fact Sheet for Deposit Area 1511

					Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Deposit Area 1511 - 301
	(Last updated 18.mar.2021)

Name of Deposit Area : Gusdal (Åheim)

(Object Id : 1511,301,00,00)

Location

County :

Møre og Romsdal (15)

Municipality :

Vanylven (1511)

Map 1:50000:

Vanylven (1119-3)

Map 1:250000:

Ulsteinvik

Marking point:

Longitude:

5.5918390

Latitude:

62.0194330

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

321662 m.

Y-coord:

6881031 m.

Commodity

Main Type:

Olivine

Sub Type:

Olivine

Production

Activity:	Mining	Reserves:	200000 thousand tons
Prod. method:	Open pit mining	Production:	16000 thousand tons
Prod. status:	Active	Volume of dump:	0 m3
		Resource estimat. standard:	JORC

Importance

Public: International Importance (reg. 25.09.2014)

Economical: Very significant , (Confirmed 05.mar.2001 by Havard Gautneb)

Products

Element/product Crude ore grade or quality

MELURG 100 ton

REFRAC

Ownership

Type of ownership Owner Land- and title number

Concessionary (Mining rights) A/S Olivin

Operations

From - To Activity Comments

1948 - 2000 Regular production Company/Institution :A/S Olivin

Mineralization

Era: Proterozoic Period:

Dating: Method:

Genesis: Form: Irregular

Main texture: Granoblastic Min. distribution: Massive (>50 % ore minerals)

Main grain size: Fine grained (< 1 mm)

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Not defined Olivine Major mineral (>90%)

Not defined Enstatite Major mineral (>10%)

Not defined Chromite Subordinate mineral (1-10%)

Not defined Chlorite Subordinate mineral (1-10%)

Information(s) in free text format

Free text

Denne forekomsten er hovedforekomsten til A/S Olivin. Forekomsten ligger ved Gusdal gård i Almklovdalen. Olivinen brytes i et åpent dagbrudd flere hundre meter stort, grovknuses og transporteres til Åheim med et transportbånd. Her knuses og klasseres bergarten. Bergarten er en dunitt som er delt inn i 5 varianter basert på sitt innhold av kloritt og opptreden av olivinkrystaller. Hovedproduktet er knust olivin som slaggdanner (85%). Det produsreres også ildfaste steinprodukter av forskjellig type og forskjellige sand produkter til special formål. Bland bedriftens nyeste produkter er sand for tildekking av forurensede masser. Produksjonene har de siste år (2014) ligget på ca. 1.4 mill tonn per år. Reservene er så store at det vil rekke til mange hundre år

Photo(s) from the Deposit area:

Photo no. 1 showing gusdal bruddet"

Photo no. 2 showing gusdal 2020"

Bibliography:

From NGU's Reference Archive:

Gautneb, Håvard , 1998

Kartlegging og prøvetaking av Kjerringhaugen, Åheim

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.98.128;18 pages

Gautneb, Håvard , 2002

XRD bestemmelse av fiber i Åheim dunitt

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.2002.026;7 pages

Abstract:

I en tilsendt prøve av borkaks, med mye fiber fra Gusdalsbruddet ble det ved bruk av røntgendiffraksjon (XRD) påvist opptreden av amfibolen antofyllitt. Dette er en Ca-fattig, Mg- og Fe-rik rombisk amfibol. For å teste XRD metodens brukbarhet ble det analysert 3 paralleller med økende mengde mineral. Kun et enkelt fiberkorn som var ca. 6mm x 0.2mm stort var imidlertid tilstrekkelig for en entydig bestemmelse av mineralet. Antofyllitt er et asbestiformt mineral som tidligere bl.a. ble produsert i Paakila-området i Finland. Sett i forhold til de store tonnasjer som brytes Almklovdalens olivinbrudd vet man at fibermaterialer opptrer kun lokalt og i små mengder. Det er kjent at den sykdomsfremkallende farlighetsgrad til asbestfiber bl.a. varierer med fiberens mineralogi. Denne type XRD analyse viste seg å være en rask og lite arbeidskrevende analysemetode og det anbefales at fibermineralet bestemmes når fiber påvises.

Grønlie, Gisle; Rost, Franz , 1974

Gravity investigation and geological interpretation of the ultramafite complex of Åheim, Sunnmøre, western Norway.

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.54 (4);367-373 pages

Abstract:

A gravity survey combined with geological field work has been made of the ultramafite complex of Åheim. The study shows that the exposed ultramafic bodies are in all probability all part of one body which has a depth of about 1 km. The central gneissic mountain, Helgehorn, is probably "floating" on top of this ultramafic body. The Bouguer anomaly contours suggest an eastward extension of the ultramafic body at depth. The total excess mass of the ultramafite complex is estimated to 1.2-1.5 X 10(10) tons and the volume is approximately 25-30 km3.

Hillestad, Gustav , 1988

Seismiske målinger Åheim

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.88.166;10 pages

Abstract:

Det ble målt 4 profiler på tilsammen ca. 1,5 km over olivinforekomster nær Åheim. Hensikten var å kartlegge områder med oppsprukket olivin og uforvitret olivin samt å få en oppfatning av om seismiske refraksjonsmålinger ville være velegnet til å skille mellom mer og mindre forvitrede partier. Måleresultatene tyder på at lydhastigheten i fjellet varierer innenfor meget vide grenser. Sannsynligvis er hastighetsreduksjonen noenlunde proposjonal med graden av oppsprekking.

Hillestad, Gustav , 1989

Seismiske målinger Åheim

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.89.132;8 pages

Abstract:

A/S Olivin er igang med å bygge en transporttunnel fra bruddet ved Gusdal til Åheim. Grunnforholdene i tunneltraseen ved påhuggsområdet på Gusdal ble undersøkt ved seismiske refraksjonsmålinger. Det ble beregnet løsmasse- mektigheter på opptil ca. 20 m. Påhugget kommer antakelig i olivin med lyd- hastighet på 5850 m/s, mens tunnelen ganske fort kommer inn i fjell med hastighet 4800 m/s. Det er rimelig å anta at dette er gneis, og i såfall kan man regne med alminnelig godt fjell på den målte strekning.

Lappin, M.A. , 1960

On the occurrence of kyanite in the eclogites of the Selje and Åheim districts, Nordfjord

;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.40 (3-4);289-296 pages

Abstract:

Kyanite is recorded for the first time in Norwegian eclogites and localities are indicated. The alteration of kyanite to a corundum-oligoclase kelyphite or to zoisite, during an amphibolite facies metamorphism of eclogite, is briefly described.

Parr, Svein Ivar , 1973

En økonomisk-geologisk undersøkelse av en olivinsteinforekomst ved Åheim.

;NTH Bergavd.;AVHANDLING

Fieldsamples

Sample No. Sample type Miscellanrous

HGNGU_96109 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96110 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96111 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96112 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96113 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96114 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96115 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96116 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96117 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96118 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96119 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96120 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

HGNGU_96121 Bedrock

Comment :This is a dummy sample that does not excists. The assosciated analyses have been compiled from various published and unpublished reports

No. of registrated oxide analyses = 1

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

Analyse Results

from

Deposit Area 1511 - 301 Gusdal (Åheim)

Oxide analyses
( All values are in % )

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

HGNGU_96109 Bedrock 40.60 0.38 0.00 8.10 0.10 50.00 0.06

HGNGU_96110 Bedrock 43.00 0.91 0.00 7.30 0.09 46.80 0.30

HGNGU_96111 Bedrock 42.10 0.27 0.00 6.90 0.08 49.10 0.10

HGNGU_96112 Bedrock 40.30 0.30 0.00 7.20 0.09 47.30 0.13

HGNGU_96113 Bedrock 37.60 0.43 0.00 7.00 0.08 44.90 0.12

HGNGU_96114 Bedrock 42.50 1.24 0.00 7.80 0.10 44.10 0.76

HGNGU_96115 Bedrock 41.20 0.27 0.00 7.10 0.09 48.40 0.23

HGNGU_96116 Bedrock 39.60 0.62 0.00 8.60 0.10 45.30 0.30

HGNGU_96117 Bedrock 42.00 0.45 0.00 6.50 0.07 49.20 0.09

HGNGU_96118 Bedrock 42.60 0.58 0.00 7.80 0.10 47.80 0.24

HGNGU_96119 Bedrock 41.90 0.21 0.00 6.90 0.08 49.70 0.07

HGNGU_96120 Bedrock 40.40 0.37 0.00 7.10 0.08 50.20 0.08

HGNGU_96121 Bedrock 39.80 0.21 0.00 11.50 0.14 47.40 0.13

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

Sample No. Na2O K2O P2O5 Loss Sum

HGNGU_96109 0.01 0.00 0.00 0.53 100.00

HGNGU_96110 0.02 0.00 0.00 1.37 100.00

HGNGU_96111 0.02 0.00 0.00 1.30 100.00

HGNGU_96112 0.01 0.00 0.00 4.50 100.00

HGNGU_96113 0.00 0.00 0.00 9.57 100.00

HGNGU_96114 0.03 0.01 0.00 3.40 100.00

HGNGU_96115 0.00 0.00 0.00 2.42 100.00

HGNGU_96116 0.01 0.00 0.00 5.80 100.00

HGNGU_96117 0.00 0.00 0.00 0.84 99.00

HGNGU_96118 0.00 0.00 0.00 0.70 100.00

HGNGU_96119 0.00 0.00 0.00 0.80 100.00

HGNGU_96120 0.00 0.00 0.00 0.90 99.00

HGNGU_96121 0.03 0.02 0.00 0.50 100.00

	Element/product	Crude ore grade or quality
	MELURG	100 ton
	REFRAC

	Type of ownership	Owner	Land- and title number
	Concessionary (Mining rights)	A/S Olivin

	From - To	Activity	Comments
	1948 - 2000	Regular production	Company/Institution :A/S Olivin

Era:	Proterozoic	Period:
Dating:		Method:
Genesis:		Form:	Irregular
Main texture:	Granoblastic	Min. distribution:	Massive (>50 % ore minerals)

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

Relationship	Mineral	Amount
Not defined	Olivine	Major mineral (>90%)
Not defined	Enstatite	Major mineral (>10%)
Not defined	Chromite	Subordinate mineral (1-10%)
Not defined	Chlorite	Subordinate mineral (1-10%)

	Abstract:
	Kyanite is recorded for the first time in Norwegian eclogites and localities are indicated. The alteration of kyanite to a corundum-oligoclase kelyphite or to zoisite, during an amphibolite facies metamorphism of eclogite, is briefly described.

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
HGNGU_96109	Bedrock	40.60	0.38	0.00	8.10	0.10	50.00	0.06
HGNGU_96110	Bedrock	43.00	0.91	0.00	7.30	0.09	46.80	0.30
HGNGU_96111	Bedrock	42.10	0.27	0.00	6.90	0.08	49.10	0.10
HGNGU_96112	Bedrock	40.30	0.30	0.00	7.20	0.09	47.30	0.13
HGNGU_96113	Bedrock	37.60	0.43	0.00	7.00	0.08	44.90	0.12
HGNGU_96114	Bedrock	42.50	1.24	0.00	7.80	0.10	44.10	0.76
HGNGU_96115	Bedrock	41.20	0.27	0.00	7.10	0.09	48.40	0.23
HGNGU_96116	Bedrock	39.60	0.62	0.00	8.60	0.10	45.30	0.30
HGNGU_96117	Bedrock	42.00	0.45	0.00	6.50	0.07	49.20	0.09
HGNGU_96118	Bedrock	42.60	0.58	0.00	7.80	0.10	47.80	0.24
HGNGU_96119	Bedrock	41.90	0.21	0.00	6.90	0.08	49.70	0.07
HGNGU_96120	Bedrock	40.40	0.37	0.00	7.10	0.08	50.20	0.08
HGNGU_96121	Bedrock	39.80	0.21	0.00	11.50	0.14	47.40	0.13

Sample No.	Na2O	K2O	P2O5	Loss	Sum
HGNGU_96109	0.01	0.00	0.00	0.53	100.00
HGNGU_96110	0.02	0.00	0.00	1.37	100.00
HGNGU_96111	0.02	0.00	0.00	1.30	100.00
HGNGU_96112	0.01	0.00	0.00	4.50	100.00
HGNGU_96113	0.00	0.00	0.00	9.57	100.00
HGNGU_96114	0.03	0.01	0.00	3.40	100.00
HGNGU_96115	0.00	0.00	0.00	2.42	100.00
HGNGU_96116	0.01	0.00	0.00	5.80	100.00
HGNGU_96117	0.00	0.00	0.00	0.84	99.00
HGNGU_96118	0.00	0.00	0.00	0.70	100.00
HGNGU_96119	0.00	0.00	0.00	0.80	100.00
HGNGU_96120	0.00	0.00	0.00	0.90	99.00
HGNGU_96121	0.03	0.02	0.00	0.50	100.00