Norsk versjon
	THE ORE DATABASE
	Occurence 5045 - 023 Nyneset
	(Object Id: 314) (Last updated: 16.05.2006)

Mineralization

	Era:	Paleozoic	Period:	Ordovician
	Genesis:	Volcex	Form:	Lens
	Main texture:	Banded	Min. distribution:	Semi-massive (20-50 % ore minerals)

Main grain size:

Fine grained (< 1 mm)

Main alteration:

No country rock alteration

	Strike/Dip:	246 / 65	Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

Ordovician

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

Group:

Gjersvik

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Carbonate	Subordinate mineral (1-10%)
	Gangue mineral	Mica	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Magnetite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Calcareous-quartz schist	Sedimentary Original rock :Tuffite
			Metamorphic facies :Greenschist
	Wall rock	Phyllite	Sedimentary Original rock :Bituminous argillite
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Schistosity	Strike/Dip :246 / 65	Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

I en veiskjæring langs en skogsbilvei nord for Nyneset gård finnes en 3 m bred rustsone i karbonatførende kvartsskifer. Undersøkelser ble foretatt tidlig på 1970-tallet i dette området, men det er ikke spor etter skjerpeaktivitet i dag. Sulfidene opptrer i linser som maksimalt er 25 cm brede, gjerne i tilknytning til kvartsrikere lag i skiferen.

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
	gr0206	Bedrock	Comment: Pyrrhotite ore, semi-massive, quartz lenses No. of registrated element analyses = 1
	NT0365.01	Bedrock	Sampler: Sandstad, J.S./...Size(kg): 1 Comment: Pyrrhotite ore, semi-massive, fine grained, quartz rich matrix. No. of registrated element analyses = 1
	1145	Bedrock	No. of registrated element analyses = 1
	1146	Bedrock	No. of registrated element analyses = 1
	1147	Bedrock	No. of registrated element analyses = 1
	1148	Bedrock	No. of registrated element analyses = 1
	1149	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 5045 - 023 Nyneset

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#
gr0206	Bedrock	152	199	7	13	39	.1	6.0
NT0365.01	Bedrock	136	340	-3	59	55	.4	4.0
1145	Bedrock	109	64	18	20	44	.5	12.0
1146	Bedrock	82	70	18	17	38	.4	9.0
1147	Bedrock	139	69	11	30	46	.5	13.0
1148	Bedrock	311	494	29	13	56	.4	10.0
1149	Bedrock	169	185	30	18	45	.4	22.0

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Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sb*	Bi*
gr0206	1.0	3.0		9	1.5	4	6.00	2	2
NT0365.01	4.0	4.0	-1.0	78	1.0	8	7.00	-2	-2
1145	2.0	6.0		33	.2	3	7.00	3	2
1146	1.0	5.0		22	.2	3	7.00	2	2
1147	5.0	15.0		102	.2	4	15.00	2	4
1148	7.0	13.0		155	1.3	9	12.00	2	2
1149	15.0	38.0		117	.2	5	11.00	2	2

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Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
gr0206	16.10	26	20	1369	22.93	3.00	6.00	1	19.0
NT0365.01	25.67	10	9	888	28.79	2.00	6.00	-2	20.0
1145	29.67	20	5	470	37.38	4.00	9.00	1	2.0
1146	27.29	19	4	467	33.72	4.00	11.00	1	2.0
1147	29.93	16	2	394	38.07	4.00	8.00	1	4.0
1148	23.11	49	12	472	34.66	4.00	9.00	1	18.0
1149	27.23	18	3	402	35.61	4.00	8.00	1	3.0

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Sample No.	La*	B*
gr0206	9.00	20
NT0365.01	4.00	-3
1145	3.00	2
1146	3.00	2
1147	2.00	2
1148	7.00	2
1149	3.00	2

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The fact sheet was created on 27.04.2024

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

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