Norsk versjon
	THE ORE DATABASE
	Occurence 5027 - 018 Høa
	(Object Id: 4535) (Last updated: 01.07.1998)

Operations

	From - To	Activity	Comments
	1997 - 1997	Sampling	Company/Institution :NGU-Malmreg.

Mineralization

	Genesis:	Sedex	Form:
	Main texture:	Structureless	Min. distribution:	Disseminated (<20 % ore minerals)

Main grain size:

Medium grained (1-3 mm)

Main alteration:

	Strike/Dip:	115 / 40	Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Period:

	Province:	Caledonides
	Geotec.unit:	Trondheim Nappe Complex
	Tectonic complex:	Gula Nappe
	Igneous complex:

Group:

Gula

Formation:

Singsås

Mineralogy

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

Lithology:

	Relationship	Rock	Origin
	Host rock	Quartzitic mica schist	Sedimentary Original rock :Muddy sandstone
			Metamorphic facies :Greenschist
	Wall rock	Phyllitic mica schist	Sedimentary Original rock :Mudstone
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Foliation	Strike/Dip :115 / 40	Post-mineralisation ;...Effect :None
	Host rock	Mineral lineation	Dir./Plunge :140 / 10	Post-mineralisation ;...Effect :None

Information(s) in free text format

Description

Skjerpet ligger ØSØ for gården Høa, i skråningen ned mot Forda, ca. 350 m.o.h., i nærheten av innmarksbeite. Mineraliseringen er undersøkt med en 5 m lang stoll mot SV (10 m3 tipp). Mineraliseringen er oppimot 0.5 m mektig og opptrer i kvartsittisk glimmerskifer. Heng- og liggbergart er henholdsvis fyllittisk glimmerskifer med mm- til cm-mektige kvartsbånd og kvartsittisk glimmerskifer, dvs. at mineraliseringen opptrer øverst i den kvartsittiske glimmerskiferen, mot kontakten til fyllittisk glimmerskifer. De middelskornige sulfidmineralene, magnetkis og svovelkis med spor av kobberkis, synes å opptre i uregelmessige årer i den finkornige skiferen, og som impregnasjon av ofte grøvre svovelkis. Det fins lokale sulfid-anrikninger til semimassive partier. Det lar seg ikke gjøre å spore mineraliseringen i strøkretningen i det overdekte terrenget.

Bibliography:

From NGU's Reference Archive:

Nilsen, Odd , 1978

	Caledonian sulphide deposits and minor iron-formations from the southern Trondheim region, Norway.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.340;35-85 + k pages

Abstract:

Within the southern and central parts of the Trondheim region of the Norwegian Caledonides a great number of small, stratabound cupriferous pyrite deposits are confined to mafic metavolcanics of the Gula, Støren and Fundsjø Groups of the Lower Palaeozoic succession. The deposits occuring within, or in close contact with the metavolcanics are characterized by their association with minor manganiferous oxide/silicate iron-formations - better known as "vasskis" ore type - within the metamorphic low-grade areas. The iron-fprmations of the metamorphic higher grade terrains on the other hand, which are extensively developed within the Gula Group, are mostly of a pyrrhotitic sulphide/silicate type and sulphurization processes are thought to have played an important role during the metamorphism. The pyrite deposits occurring adjacent to the metavolcanics bear no relationship to the iron-formations. They are embedded in pelitic, often carbonaceous assemblages (Gula Group) or within tuffitic members of the volcanogene Støren Group, and they are thought to represent re-sedimented (reworked) deposits. The pyrite deposits display varying degree of metamorphic reconstitution and a tectonic control has apparently determined their disc- or ruler-shaped morphology.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0339.01	Dump	Sampler: Wilberg/...Stored: Løkken Comment: Kvartsittisk glimmerskifer med po-py-diss. No. of registrated element analyses = 1
	ST0339.02	Dump	Sampler: Wilberg/...Stored: Løkken Comment: Kvartsittisk glimmerskifer med po-py-diss. 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 5027 - 018 Høa

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#
ST0339.01	Dump	297	159	78	103	181	1.4	3.0
ST0339.02	Dump	270	179	61	85	220	1.5	2.0

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Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
ST0339.01	14.0	6.0	17	2.0	27	15.00	-3	8	9.40
ST0339.02	14.0	10.0	17	1.9	24	16.00	-3	14	10.20

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Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
ST0339.01	169	82	3002	16.03	8.00	-8.00	7	70.0	32.00
ST0339.02	194	81	3255	17.97	10.00	-8.00	4	68.0	30.00

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Sample No.	B*
ST0339.01	-3
ST0339.02	-3

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The fact sheet was created on 29.04.2024

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