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	THE ORE DATABASE
	Deposit Area 1640 - 073
	(Last updated 08.nov.2023)

Importance

Public:

Not Assessed (reg. 18.02.2015)

Economical:

Not classified/evaluated

Mineralization

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

Main grain size:

Medium grained (1-3 mm)

Main alteration:

	Strike/Dip:		Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

Ordovician

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

Group:

Aursund Group

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Feldspar	Major mineral (>10%)
	Gangue mineral	Carbonate	Subordinate mineral (1-10%)
	Gangue mineral	Biotite	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Sphalerite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Metagreywacke	Sedimentary Original rock :Greywacke
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :143 / 20	Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Skjerpet ligger i SØ-skråningen av Storhøgda på sørsiden av en liten rygg vest for myra på vestsida av vann 930. Det består av 6 x 3 m vannfyllt synk som er omtrent 2 m dyp. Vertsbergart er finkornet, kvartsrik psammit med biotittblaster. Svak mineralisering kan sees i SØ-hjørnet av synken med mm-tynne årer av kobberkis, gjerne tilknyttet kalkspatrike tynne bånd. På tippen finnes rikere, semi-massiv kobberkis-sinkblende-blyglans mineralisering.

Photo(s) from the Deposit area:

Photo no. 1 showing Storhøgda skjerp" Photo no. 2 showing Storhøgda skjerp"

Bibliography:

From NGU's Reference Archive:

Bakke, Inge , 1978

	Stugusjø. Beskrivelse til det berggrunnsgeologiske kart 1720 I - 1:50 000 (med fargetrykt kart).

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL; KARTBESKRIVELSE;NGU; Skrifter; No.339; 22;1-19 + ka pages

Abstract:

Two regional thrust planes divide the bedrock of the area into three principal units. In the autochthonous basement the main lithologies are porphyry and granite. Three rocks are correlated with sub-Jotnian rocksi in Trysil and Dalarne. Younger metadiabase dykes out through the acidic rocks. In the overlying Remsklepp Nappe the Late Precambrian and Eocambrian Hedmark Group ("sparagmite") is represented by meta-arkose, orthoquartzite and dolomite marble. Sills of porpyritic metadiabase are also present. The Trondheim Nappe is tectonically the highest unit. Earlier investigations indicate a general inversion of the lithostratigraphic succession. Phyllite and metagraywackes of the supposed Upper Ordovician Stugusjø formation overlie meta-arkose| of the assumed Silurian Hummelfjell formation. Thick layers of mafic rocks within the Hummelfjell formation are interpreted as fine-grained, schistose metadiabase. The border between the tw formations is tectonically disturbed. Characteristics of folds and lineations suggest an easterly to east-south-easterly thrusting of the two nappes. Regional metamorphism completely recrystallized the rocks of the Trondheim Nappe to a mineral assemblage corresponding to that of upper greenschist facies. The rocks of the Remsklepp Nappe and the basement were only partly recrystallized and under conditions equivalent to middle greenschist facies.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0384.01	Dump	Sampler :J.S. Sandstad/...Stored :Løkken Comment :Semi-massiv, finkornet kobberkis-sinkblende-blyglans i kvartsrik grunnmasse, Cu-rik No. of registrated element analyses = 1
	ST0384.02	Dump	Sampler :J.S. Sandstad/...Stored :Løkken Comment :Sterk disseminasjon av kobberkis-sinkblende-blyglans i grovkornet kvarts No. of registrated element analyses = 1
	ST0384.03	Bedrock	Sampler :J.S. Sandstad/...Stored :Løkken Comment :Finkornete kobberkis+sinkblende striper i karbonatbånd No. of registrated element analyses = 1
	400050	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1
	400051	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1
	400052	Dump	Sampler :MINDEX ASA 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 1640 - 073 Storhøgda

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#
ST0384.01	Dump	31048	99999	24687	135	8	99.7	253.0
ST0384.02	Dump	20550	99999	24658	129	7	75.5	276.0
ST0384.03	Bedrock	11613	8641	710	30	41	9.3	169.0
400050	Dump	57300	116900	18700	106	14	47.7	231.0
400051	Dump	13700	168400	8555	144	102	13.6	412.0
400052	Dump	8755	18800	1281	35	22	2.3	103.0

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

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
ST0384.01	.5	.5	20	337.8	23	9.00	18	278	12.30
ST0384.02	1.0	2.0	3	328.4	27	8.00	12	251	10.40
ST0384.03	1.0	1.0	10	26.7	104	2.00	21	15	1.79
400050			5	242.1	10	7.00	3	165
400051			3	317.7	3	4.00	3	435
400052			15	39.1	42	5.00	3	18

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

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
ST0384.01	9	71	160	6.42	1.00	4.00	1	5.0	5.00
ST0384.02	10	31	200	5.50	1.00	4.00	1	4.0	2.00
ST0384.03	75	72	705	5.21	4.00	4.00	7	17.0	5.00
400050	10	81	191	8.49				15.0	18.00
400051	11	13	431	10.00				2.0	2.00
400052	41	112	655	4.81				16.0	7.00

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

Sample No.	B*	Ti*
ST0384.01	7
ST0384.02	2
ST0384.03	2
400050		50
400051		50
400052		300

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The fact sheet was created on 19.05.2024

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

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