Faktarka for Forekomstområde 1833

					English version
	MALMDATABASEN
	Forekomstområde 1833 - 104
	(Sist oppdatert 30.nov.2015)

Navn på deposit area : Høgtuva 6

(Objekt Id : 1833,104,00,00)

Lokalisering

Fylke :

Nordland (18)

Kommune :

Rana (1833)

Kart 1:50000:

Mo i Rana (1927-1)

Kart 1:250000:

Mo i Rana

Markeringspunkt:

Lengdegrad:

13.8431480

Breddegrad:

66.4060400

EU89-UTM Zone 33

(Coordinates IS confirmed)

X-koord:

448332 m.

Y-koord:

7365647 m.

Materialtype

	Hovedtype:	Spesialmetaller (Nb,Ta,Be,Li,Sc,REE)	Subtype:	Beryllium
			Element(s):	Be U Th Nb Y REE Zr Sn Zn

Production

Activity:	Prospektering	Reserves:
Prod. method:		Production:
Prod. status:		Volume of dump:

Betydning

Offentlig: Not Assessed (reg. 18.02.2015)

Economical: Ikke vurdert

Products

Element/product Crude ore grade or quality

BE 1.19 %

NB 1.25 %

SN .16 %

TH 3.19 %

U 1.01 %

Y .65 %

ZN 3.71 %

ZR 4.39 %

Operations

From - To Activity Comments

1986 - 1986 Geology Company/Institution :NGU

Mineralization

Era: Proterozoic Period: Mesoproterozoic

Dating: 434 (-14\+14) million year Method: U/Pb

Genesis: Metamorfogen Form: Linse

Main texture: Porfyroblastisk Min. distribution: Disseminert

Main grain size: Grovkornet (>3 mm) Main alteration: Skarnomvandling

Strike/Dip: 360 / 25 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period: Mesoproterozoic

Province: Caledonides

Geotec.unit: Rødingsfjell Nappe Complex

Tectonic complex:

Igneous complex:

Group: Høgtuvkomplekset Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Pyroxene Major mineral (>10%)

Gangue mineral Potassic feldspar Subordinate mineral (1-10%)

Gangue mineral Plagioclase Subordinate mineral (1-10%)

Gangue mineral Quartz Subordinate mineral (1-10%)

Gangue mineral Fluorspar Subordinate mineral (1-10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Gangue mineral Epidote Subordinate mineral (1-10%)

Gangue mineral Calcite Subordinate mineral (1-10%)

Gangue mineral Chlorite Accessory mineral (<1%)

Gangue mineral Apatite Accessory mineral (<1%)

Gangue mineral Titanite Accessory mineral (<1%)

Ore mineral Zircon Subordinate mineral (1-10%)

Ore mineral Hoegtuvaite Subordinate mineral (1-10%)

Ore mineral Allanite Subordinate mineral (1-10%)

Ore mineral Danalite Subordinate mineral (1-10%)

Ore mineral Helvite Accessory mineral (<1%)

Ore mineral Pyrochlore Accessory mineral (<1%)

Ore mineral Thorite Accessory mineral (<1%)

Ore mineral Galena Accessory mineral (<1%)

Ore mineral Gadolinite Accessory mineral (<1%)

Ore mineral Chalcopyrite Accessory mineral (<1%)

Ore mineral Magnetite Accessory mineral (<1%)

Ore mineral Uraninite Accessory mineral (<1%)

Ore mineral Cassiterite Accessory mineral (<1%)

Ore mineral Pyrite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Unknown Granitt Intrusive
Original rock :Granite

Metamorphic facies :Amphibolite

Unknown Granittisk gneis Extrusive
Original rock :Rhyolite

Metamorphic facies :Amphibolite

Structures

Location: Type: Orientation(360 gr.): Relation to min.:

Unknown Foliation Strike/Dip :360 / 25 Post-mineralisation ;...Effect :None

Opplysning(er) i fritekstformat

Fri tekst

Under den lite folierte, grovkornige granittlinsa i liggen av den mineraliserte gneisen (NO0746 Bordvedåga) er det flere utholdende flusspat- og karbonatrike gneislag, stedvis massiv flusspat, som strekker seg fra Sørfjellet i SØ til Trolldalsaksla i NV. På Trolldalsaksla er det lokal anrikning av Be-mineralene danalitt, helvin, høgtuvaitt og gadolinitt i en flusspat- og karbonatrik horisont. Mineraliseringen (0.5m bred og noen meter lang) karakteriseres ved skarnmineralogi (granat, diopsid, magnetitt) og høye konsentrasjoner av en rekke sporelementer. Tilknytningen til skarndannelse er usikker. Det er ellers i området ikke kjent lignende skarnifisering, hvilket ville være ventet med de uttallige karbonathorisontene. Mineraliseringen på Trolldalsaksla har en viss likhet med radioaktive, mørke zirkon-biotitt-segregasjoner som opptrer i og i nærheten av den mineraliserte gneisen. Enkelte av disse er også anriket på Be. På Sørfjellet (UTM 450050 7364500) opptrer beryll i flere tynne konkordante lag med flusspatrik gneis. Også en diskordant flusspat-beryll-anrikning i gneisen finnes i området. Analyse gir 0.36% Be. Området med de mineraliserte lagene er på minst 50m x 50m.

Bibliography:

From NGU's Reference Archive:

Wilberg, Rune , 1987

Granitophile elements in granitoid rocks in Precambrian basement windows in Nordland, Northern Norway, with special reference to the rare-element enriched gneiss at Bordvedåga, Høgtuva window

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.87.043

Abstract:

This report gives the results of field work done in the Precambrian Høgtuva window, with minor comments on the other similar windows in Nordland. The aim for this work was to attain a better understanding of the genesis of the rare-element mineralization at Bordvedåga, and thereby provide guidelines for further prospecting for granitophile element deposits.

Fieldsamples

Sample No. Sample type Miscellanrous

JSHog17 Bedrock

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

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

Navn på locality : Skjerp 1

(Objekt Id : 1833,104,01,00)

Lokalisering

Fylke : Nordland (18) Kommune : Rana (1833)

Kart 1:50000: Mo i Rana (1927-1) Kart 1:250000: Mo i Rana

Markeringspunkt: Lengdegrad: 13.8806240 Breddegrad: 66.3941990

EU89-UTM Zone 33 (Coordinates IS confirmed)

X-koord: 449982 m. Y-koord: 7364297 m.

Materialtype

Hovedtype: Spesialmetaller (Nb,Ta,Be,Li,Sc,REE) Subtype: Beryllium

Element(s): Be U Th Nb Y REE Zr Sn Zn

Production

Activity: Prospektering Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Analyse Results

from

Forekomstområde 1833 - 104 Høgtuva 6

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*

JSHog17 Bedrock 0 175 36 1 1 2 16

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

Sample No. Sn* Sb* Bi* Se* Th* U* W* Rb* Sr*

JSHog17 255 0 0 5.70 363.90 174.80 2 411.5 11.6

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

Sample No. Y* Zr* Nb* Ta* Cs* La* Ce* Pr* Nd*

JSHog17 894.2 14887 432.80 30.30 1.00 26.50 117.50 15.04 49.30

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

Sample No. Sm* Eu* Gd* Tb* Dy* Ho* Er* Tm* Yb*

JSHog17 16.91 0.60 22.35 8.87 91.61 33.49 179.46 45.04 375.56

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

Sample No. Lu* B* Hf* Tl*

JSHog17 49.83 6 595.70 3

Oxide analyses
( All values are in % )

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

JSHog17 Bedrock 74.04 11.70 0.15 4.19 0.04 0.57 0.19

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

Sample No. Na2O K2O P2O5 Loss Sum

JSHog17 4.12 4.05 0.02 0.20 99.00

	Element/product	Crude ore grade or quality
	BE	1.19 %
	NB	1.25 %
	SN	.16 %
	TH	3.19 %
	U	1.01 %
	Y	.65 %
	ZN	3.71 %
	ZR	4.39 %

	From - To	Activity	Comments
	1986 - 1986	Geology	Company/Institution :NGU

Era:	Proterozoic	Period:	Mesoproterozoic
Dating:	434 (-14\+14) million year	Method:	U/Pb
Genesis:	Metamorfogen	Form:	Linse
Main texture:	Porfyroblastisk	Min. distribution:	Disseminert

	Province:	Caledonides
	Geotec.unit:	Rødingsfjell Nappe Complex
	Tectonic complex:
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Amphibole	Major mineral (>10%)
Gangue mineral	Pyroxene	Major mineral (>10%)
Gangue mineral	Potassic feldspar	Subordinate mineral (1-10%)
Gangue mineral	Plagioclase	Subordinate mineral (1-10%)
Gangue mineral	Quartz	Subordinate mineral (1-10%)
Gangue mineral	Fluorspar	Subordinate mineral (1-10%)
Gangue mineral	Biotite	Subordinate mineral (1-10%)
Gangue mineral	Epidote	Subordinate mineral (1-10%)
Gangue mineral	Calcite	Subordinate mineral (1-10%)
Gangue mineral	Chlorite	Accessory mineral (<1%)
Gangue mineral	Apatite	Accessory mineral (<1%)
Gangue mineral	Titanite	Accessory mineral (<1%)
Ore mineral	Zircon	Subordinate mineral (1-10%)
Ore mineral	Hoegtuvaite	Subordinate mineral (1-10%)
Ore mineral	Allanite	Subordinate mineral (1-10%)
Ore mineral	Danalite	Subordinate mineral (1-10%)
Ore mineral	Helvite	Accessory mineral (<1%)
Ore mineral	Pyrochlore	Accessory mineral (<1%)
Ore mineral	Thorite	Accessory mineral (<1%)
Ore mineral	Galena	Accessory mineral (<1%)
Ore mineral	Gadolinite	Accessory mineral (<1%)
Ore mineral	Chalcopyrite	Accessory mineral (<1%)
Ore mineral	Magnetite	Accessory mineral (<1%)
Ore mineral	Uraninite	Accessory mineral (<1%)
Ore mineral	Cassiterite	Accessory mineral (<1%)
Ore mineral	Pyrite	Accessory mineral (<1%)

Relationship	Rock	Origin
Unknown	Granitt	Intrusive Original rock :Granite
		Metamorphic facies :Amphibolite
Unknown	Granittisk gneis	Extrusive Original rock :Rhyolite
		Metamorphic facies :Amphibolite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Unknown	Foliation	Strike/Dip :360 / 25	Post-mineralisation ;...Effect :None

	Abstract:
	This report gives the results of field work done in the Precambrian Høgtuva window, with minor comments on the other similar windows in Nordland. The aim for this work was to attain a better understanding of the genesis of the rare-element mineralization at Bordvedåga, and thereby provide guidelines for further prospecting for granitophile element deposits.

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	As*	Ba*
JSHog17	Bedrock	0	175	36	1	1	2	16

Sample No.	Sn*	Sb*	Bi*	Se*	Th*	U*	W*	Rb*	Sr*
JSHog17	255	0	0	5.70	363.90	174.80	2	411.5	11.6

Sample No.	Y*	Zr*	Nb*	Ta*	Cs*	La*	Ce*	Pr*	Nd*
JSHog17	894.2	14887	432.80	30.30	1.00	26.50	117.50	15.04	49.30

Sample No.	Sm*	Eu*	Gd*	Tb*	Dy*	Ho*	Er*	Tm*	Yb*
JSHog17	16.91	0.60	22.35	8.87	91.61	33.49	179.46	45.04	375.56

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
JSHog17	Bedrock	74.04	11.70	0.15	4.19	0.04	0.57	0.19