Norsk versjon
	THE ORE DATABASE
	Occurence 5042 - 023 Sagfossen
	(Object Id: 348) (Last updated: 18.12.1998)

Operations

	From - To	Activity	Comments
	1991 - 1991	Sampling	Company/Institution :NGU

Mineralization

	Era:	Paleozoic	Period:
	Genesis:	Sedimentary deposit	Form:	Layer
	Main texture:	Banded	Min. distribution:	Disseminated (<20 % ore minerals)

Main grain size:

Fine grained (< 1 mm)

Main alteration:

	Strike/Dip:		Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

	Province:	Caledonides
	Geotec.unit:	Køli Nappe Complex
	Tectonic complex:	Stikke Nappe
	Igneous complex:

Group:

Formation:

Brænnelv

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Muscovite	Major mineral (>10%)
	Gangue mineral	Calcite	Major mineral (>10%)
	Gangue mineral	Graphite	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Accessory mineral (<1%)
	Ore mineral	Sphalerite	Accessory mineral (<1%)
	Ore mineral	Arsenopyrite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Graphitic phyllite	Sedimentary Original rock :Argillaceous sediment
			Metamorphic facies :Greenschist

Information(s) in free text format

Free text

Hovedsonen ligger umiddelbart nedenfor Sagfossen, og det er bilvei helt fram på begge sider. Lettest tilgjengelig fra østsiden. Grafittfyllitten er noe mere oppsmuldret her enn i liknende mineraliseringer lengre nord. Gips- og svoveldannelse tyder på sterkere forvitring (omvandling). I hovedsonene som er mange meter mektig, finnes vesentlig finkornet magnetkis, mens i andre blotninger i nærheten forekommer også større svovelkiskorn i bånd.

Bibliography:

From NGU's Reference Archive:

Oftedahl, Christoffer , 1958

	Oversikt over Grongfeltets skjerp og malmforekomster.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.202;1-75 + fo pages

Abstract:

Ore occurences of the Grong area: In the period 1910-1918 a great number of ore occurences were discovered in the Grong area. The late state geologist Steinar Foslie mapped the area in the years 1922-1931. Foslie also mapped all claims and occurences and made special field investigations in a few cases. This book presents a survey of all occurences chiefly based on the field observations of Foslie. In addition the present author has done some field work in connection with the three large deposits, Joma, Skorovass, and Gjersvik. The map, Plate 1, shows the areal geology and the location of the occurrences, numbered from 1 to 131. the ore of the occurrences is chiefly pyrite. The larger occurrences also contain some chalcopyrite and sphalerite etc. and the smaller occurrences contain ither pure pyrite with some magnetite. The Joma deposit (No. 1), contains about 15.5 mill. tons of ore. The ore zone forms an arc and is situated within a thick series of greenstones (Fig. 1). The Skorovass mine (No. 2), contains about 7,5 mill. tons of ore. The deposit is situated in a greenstone complex (Fig. 7), and is immediately surrounded by asid tuffs of quartz keratophyric composition (Table 1).

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	LS91147	Bedrock	Sampler: Størseth, L.R. Comment: Coarse grained pyrite in graphite phyllite. No. of registrated element analyses = 1
	LS91148	Bedrock	Sampler: Størseth, L.R. Comment: Semi-massive pyrrhotite-pyrite ore in graphite phyllite. No. of registrated element analyses = 1
	LS91149	Bedrock	Sampler: Størseth, L.R. Comment: Pyrrhotite mineralization in very graphite-rich phyllite. No. of registrated element analyses = 1
	1011	Bedrock	No. of registrated element analyses = 1
	1037	Bedrock	No. of registrated element analyses = 1
	1038	Bedrock	No. of registrated element analyses = 1
	1039	Bedrock	No. of registrated element analyses = 1
	1040	Bedrock	No. of registrated element analyses = 1
	1041	Bedrock	No. of registrated element analyses = 1
	1042	Bedrock	No. of registrated element analyses = 1

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

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Analyse Results

from

Deposit Area 5042 - 023 Sagfossen

Element analyses

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

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
LS91147	Bedrock	207	60	49	38	169	.8	24.0
LS91148	Bedrock	221	42	26	63	210	.4	19.0
LS91149	Bedrock	303	45	35	18	230	1.1	14.0
1011	Bedrock	62	174	10	6	22	.3	6.0
1037	Bedrock	234	94	7	98	106	.5	6.0
1038	Bedrock	169	50	7	29	109	.4	46.0
1039	Bedrock	302	25	33	18	185	1.2	19.0
1040	Bedrock	246	30	41	7	50	1.0	15.0
1041	Bedrock	271	25	35	18	189	1.2	27.0
1042	Bedrock	314	33	97	4	210	1.7	26.0

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Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
LS91147	6.0	35.0	222	.2	9	42.00	12	2	14.63
LS91148	3.0	40.0	26	.2	12	28.00	3	2	10.40
LS91149	5.0	8.0	2	.2	13	52.00	7	2	13.40
1011	5.0	3.0	6	.5	31	1.00	3	2	1.51
1037	5.0	14.0	11	.9	5	23.00	2	2	13.31
1038	7.0	25.0	9	1.2	3	9.00	2	2	12.69
1039	15.0	9.0	2	.5	23	34.00	2	5	13.71
1040	15.0	15.0	2	.3	21	20.00	2	2	1.70
1041	7.0	9.0	2	.6	18	58.00	2	3	12.98
1042	8.0	8.0	8	1.6	10	60.00	2	4	16.80

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

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
LS91147	100	70	394	21.19	6.00	16.00	1	117.0	18.00
LS91148	88	36	499	15.32	5.00	15.00	1	136.0	19.00
LS91149	71	47	215	18.65	6.00	29.00	1	15.0	17.00
1011	39	14	744	4.42	12.00	5.00	1	29.0	29.00
1037	147	58	568	11.39	8.00	6.00	1	16.0	21.00
1038	54	27	470	15.77	5.00	6.00	1	139.0	14.00
1039	72	20	70	10.06	12.00	34.00	1	19.0	30.00
1040	61	22	63	5.38	12.00	11.00	1	33.0	24.00
1041	52	8	50	11.31	7.00	17.00	1	10.0	14.00
1042	35	6	224	24.47	8.00	40.00	1	93.0	15.00

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Sample No.	B*
LS91147	5
LS91148	5
LS91149	4
1011	9
1037	2
1038	2
1039	2
1040	8
1041	3
1042	2

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The fact sheet was created on 05.05.2024

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