Faktarka for Forekomstområde 1845

					English version
	MALMDATABASEN
	Forekomstområde 1845 - 014
	(Sist oppdatert 23.okt.2024)

Navn på forekomstområde : Gjerdalsvann

(Objekt Id : 1845,014,00,00)

Lokalisering

Fylke :

Nordland (18)

Kommune :

Sørfold (1845)

Kart 1:50000:

Gjerdal (2130-2)

Kart 1:250000:

Sulitjelma

Markeringspunkt:

Lengdegrad:

16.1356130

Breddegrad:

67.6945320

EU89-UTM Zone 33

(Koordinatene ER bekreftet)

X-koord:

548097 m.

Y-koord:

7509248 m.

Materialtype

	Hovedtype:	Spesialmetaller (Nb,Ta,Be,Li,Sc,REE)	Subtype:	REE-metaller
			Element(er):	La Ce Nb Y U Th

Produksjon

Aktivitet:	Prospektering	Reserver:
Prod. metode:		Produksjon:
Prod. status:		Tippvolum:

Betydning

Offentlig: (Ingen data)

Økonomisk: Ikke vurdert

Mineralisering

Æra: Periode:

Datering: Metode:

Genese: Form:

Hovedtextur: Min. fordeling:

Kornstørrelse: Hovedomvandling:

Strøk/Fall: Retning:

Feltstupning:

Stratigrafisk klassifikasjon av vertsbergart

Æra: Periode:

Provins:

Geotek.enhet:

Tektonisk complex:

Intrusivt komplex:

Gruppe: Formasjon:

Opplysning(er) i fritekstformat

Fri tekst

Müller (2011) write the following: The Gjerdalsvatn locality was chosen as target area on the basis of one Uranal database analysis of granite gneiss with anomalously high La - 541 ppm and Ce - 1200 ppm (Müller 2010). The sample was collected by J. Hysingjord in the 1970s. The locality was immediately identified in the field because of high gamma-radiation of >700 cps compared to the host granite gneiss with about 400 cps. The rock with the high gamma-radiation forms a dyke-like structure which is about 600 m long and up to 20 m wide and plunges 60-70º to the S-SE (Figs. 21, 22). The estimated resource is about 150 000 tons assuming a vertical extension of the mineralisation of 25 m. It is a fine-grained, almost aplitic biotite granite gneiss which can be easily distinguished from the coarse-grained granite gneiss host (Fig. 22b). Four finegrained granite gneiss samples (23091001, -02, -04, 28091009) and one coarse-grained granite gneiss sample (23091003) were collected. Surprisingly, the host granite gneiss (sample 23091003) has the highest REO+Y2O3 of 0.111 wt.% but the lowest U - 4 ppm and Th of 30 ppm, explaining the low gamma-ray intensity (Fig. 23). The fine-grained granite gneiss contain 0.010 to 0.052 wt.% REO+Y2O3, 164 - 230 ppm Zr, 38-56 ppm Th and 5 - 21 ppm U. In this case, the scintillometer measurements are not indicative for elevated REE concentrations. The Gjerdalsvatn granite gneisses are slightly enriched in LREE compared to average granite composition and slightly depleted in HREE (Fig. 24). Sample 28091009 is, for some reason, depleted in all REE compared to the average granite composition. The most common REE-bearing accessory minerals are allanite (20-250 µm), zircon (20-120 µm) and apatite (40-100 µm) (Fig. 25). The LREE enrichment is explained by the dominance of allanite and apatite over zirco

Litteraturfortegnelser:

Fra NGU's Referansearkiv.:

Müller, Axel , 2011

Potential of rare earth element and Zr-, Be, U-, Th-, (W-) mineralisations in central and northern Nordland - Part 2

;Norges geologiske undersøkelse;RAPPORT;NGU-rapport; No.2011.021;56 sider

Abstrakt:

In this report results of the investigation of potential rare earth elements (REE) and Zr-, Be, U-, Th-, (W-) mineralisations in central and northern Nordland are presented. The investigated and sampled mineralisations were proposed in NGU report 2009.037 on the basis if existing reports and geochemical data sets. The investigation targets were evolved Proterozoic TIB-type granites (TIB = Trans-Scandinavian Igneous Belt) of the Tysfjord, Sommerset and Rishaugfjell basement windows, in particular, the Hatten- Tilthornet massif, Hundholmen, Kjerrfjellet, Hellemobotn, Reinoksskardet, upper Gjerdalen areas, the Sommerset basement Window, Rismålsvatn, and Memaurvatn. The general aim was to identify Zr-Ree mineralisations with >= 2wt.% REO (including Y2O3; REO - rare earth oxides) which are possibly enriched in Be, U and Th as well.

Feltprøver

Prøvenr. Prøvetype Diverse

23091001 Fastfjell

Prøvetaker :Axel M¿ller

Kommentar :fine-grained biotite granite gneiss, mineralised, UTM east 548097, UTM north 7509249

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

23091002 Fastfjell

Prøvetaker :Axel M¿ller

Kommentar :fine-grained biotite granite gneiss, mineralised, UTM east 548030, UTM north 7509236

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

23091003 Fastfjell

Prøvetaker :Axel M¿ller

Kommentar :coarse-grained biotite granite gneiss, non-mineralised, UTM east 548063, UTM north 7509252

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

23091004 Fastfjell

Prøvetaker :Axel M¿ller

Kommentar :fine-grained biotite granite gneiss, mineralised, UTM east 548162, UTM north 7509248

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

28091009 Fastfjell

Prøvetaker :Axel M¿ller

Kommentar :fine-grained biotite granite gneiss, mineralised, UTM east 547785, UTM north 7509232

Antall registrerte elementanalyser = 1

Antall registrerte oksydanalyser = 1

NB! Alle analyseverdier er vist i slutten av utskriften.:

Analyseresultater

fra

Forekomstområde 1845 - 014 Gjerdalsvann

Elementanalyser
( *=parts pr. million, #=parts pr.billion, Negative verdier betyr under deteksjonsgrensen.)

Prøvenr. Prøvetype Cu* Zn* Pb* Co* Ni* Au# As*

23091001 Fastfjell 0 74 6 1 1 -.5 1

23091002 Fastfjell 0 59 8 1 0 -.5 1

23091003 Fastfjell 1 72 10 1 -0 -.5 1

23091004 Fastfjell 0 53 8 1 1 -.5 1

28091009 Fastfjell 0 38 3 1 0 -.5 -1

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

Prøvenr. Cd* Ba* Mo* Sn* Sb* Bi* Se* Ga* V*

23091001 -.1 357 1.80 2 -0 -0 -0.50 20.40 -8

23091002 -.1 341 2.40 2 -0 -0 -0.50 20.30 -8

23091003 -.1 439 2.00 1 -0 -0 -0.50 24.10 -8

23091004 -.1 261 0.40 -1 -0 -0 -0.50 19.80 -8

28091009 -.1 388 2.20 2 -0 -0 -0.50 18.60 -8

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

Prøvenr. Th* U* W* Rb* Sr* Y* Zr* Nb* Cs*

23091001 56.10 21.60 -1 241.8 86.9 31.9 218 24.10 1.90

23091002 41.90 13.90 -1 266.1 87.0 34.7 203 22.00 2.60

23091003 30.30 4.60 -1 233.5 79.9 53.3 382 31.40 0.80

23091004 44.00 10.10 -1 243.1 78.1 24.4 164 22.50 2.40

28091009 37.60 4.90 -1 224.2 113.8 19.0 230 19.10 1.20

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

Prøvenr. La* Ce* Pr* Nd* Sm* Eu* Gd* Tb* Dy*

23091001 95.60 197.60 19.27 63.70 9.45 0.61 6.63 1.04 5.72

23091002 94.50 184.70 19.04 61.90 9.35 0.62 6.98 1.14 6.27

23091003 198.70 444.00 42.56 148.20 20.03 1.27 13.61 2.03 10.06

23091004 62.10 127.60 13.34 44.50 6.75 0.48 5.27 0.85 4.50

28091009 7.90 33.00 1.99 6.80 1.91 0.23 1.81 0.42 2.84

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

Prøvenr. Ho* Er* Tm* Yb* Lu* Be* Hf* Hg* Tl*

23091001 1.10 3.05 0.48 2.97 0.40 5 6.50 -0 1

23091002 1.24 3.60 0.53 3.33 0.51 4 6.90 -0 1

23091003 1.90 5.51 0.80 4.86 0.75 3 10.60 -0 0

23091004 0.91 2.49 0.37 2.29 0.32 4 5.90 -0 1

28091009 0.66 2.07 0.31 2.19 0.31 3 7.10 -0 0

Oksydanalyser
(Alle verdier er i %)

Prøvenr. Prøvetype SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO

23091001 Fastfjell 73.72 13.61 0.22 2.09 0.03 0.27 0.77

23091002 Fastfjell 74.09 13.48 0.19 1.86 0.04 0.21 0.77

23091003 Fastfjell 73.32 13.08 0.23 2.49 0.05 0.08 0.77

23091004 Fastfjell 74.54 13.44 0.16 1.60 0.03 0.22 0.72

28091009 Fastfjell 73.20 13.68 0.19 1.90 0.04 0.21 0.97

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

Prøvenr. Na2O K2O P2O5 Loss Sum

23091001 3.92 5.02 0.04 0.20 100.00

23091002 3.65 5.27 0.04 0.30 100.00

23091003 3.34 6.01 0.03 0.40 100.00

23091004 3.96 4.93 0.03 0.30 100.00

28091009 3.44 5.54 0.04 0.70 100.00

	Æra:		Periode:
	Datering:		Metode:
	Genese:		Form:
	Hovedtextur:		Min. fordeling:

	Provins:
	Geotek.enhet:
	Tektonisk complex:
	Intrusivt komplex:

Prøvenr.	Prøvetype	Cu*	Zn*	Pb*	Co*	Ni*	Au#	As*
23091001	Fastfjell	0	74	6	1	1	-.5	1
23091002	Fastfjell	0	59	8	1	0	-.5	1
23091003	Fastfjell	1	72	10	1	-0	-.5	1
23091004	Fastfjell	0	53	8	1	1	-.5	1
28091009	Fastfjell	0	38	3	1	0	-.5	-1

Prøvenr.	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*	Se*	Ga*	V*
23091001	-.1	357	1.80	2	-0	-0	-0.50	20.40	-8
23091002	-.1	341	2.40	2	-0	-0	-0.50	20.30	-8
23091003	-.1	439	2.00	1	-0	-0	-0.50	24.10	-8
23091004	-.1	261	0.40	-1	-0	-0	-0.50	19.80	-8
28091009	-.1	388	2.20	2	-0	-0	-0.50	18.60	-8

Prøvenr.	Th*	U*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Cs*
23091001	56.10	21.60	-1	241.8	86.9	31.9	218	24.10	1.90
23091002	41.90	13.90	-1	266.1	87.0	34.7	203	22.00	2.60
23091003	30.30	4.60	-1	233.5	79.9	53.3	382	31.40	0.80
23091004	44.00	10.10	-1	243.1	78.1	24.4	164	22.50	2.40
28091009	37.60	4.90	-1	224.2	113.8	19.0	230	19.10	1.20

Prøvenr.	La*	Ce*	Pr*	Nd*	Sm*	Eu*	Gd*	Tb*	Dy*
23091001	95.60	197.60	19.27	63.70	9.45	0.61	6.63	1.04	5.72
23091002	94.50	184.70	19.04	61.90	9.35	0.62	6.98	1.14	6.27
23091003	198.70	444.00	42.56	148.20	20.03	1.27	13.61	2.03	10.06
23091004	62.10	127.60	13.34	44.50	6.75	0.48	5.27	0.85	4.50
28091009	7.90	33.00	1.99	6.80	1.91	0.23	1.81	0.42	2.84

Prøvenr.	Ho*	Er*	Tm*	Yb*	Lu*	Be*	Hf*	Hg*	Tl*
23091001	1.10	3.05	0.48	2.97	0.40	5	6.50	-0	1
23091002	1.24	3.60	0.53	3.33	0.51	4	6.90	-0	1
23091003	1.90	5.51	0.80	4.86	0.75	3	10.60	-0	0
23091004	0.91	2.49	0.37	2.29	0.32	4	5.90	-0	1
28091009	0.66	2.07	0.31	2.19	0.31	3	7.10	-0	0

Prøvenr.	Prøvetype	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
23091001	Fastfjell	73.72	13.61	0.22	2.09	0.03	0.27	0.77
23091002	Fastfjell	74.09	13.48	0.19	1.86	0.04	0.21	0.77
23091003	Fastfjell	73.32	13.08	0.23	2.49	0.05	0.08	0.77
23091004	Fastfjell	74.54	13.44	0.16	1.60	0.03	0.22	0.72
28091009	Fastfjell	73.20	13.68	0.19	1.90	0.04	0.21	0.97

Prøvenr.	Na2O	K2O	P2O5	Loss	Sum
23091001	3.92	5.02	0.04	0.20	100.00
23091002	3.65	5.27	0.04	0.30	100.00
23091003	3.34	6.01	0.03	0.40	100.00
23091004	3.96	4.93	0.03	0.30	100.00
28091009	3.44	5.54	0.04	0.70	100.00