Fact Sheet for <b>Occurence 5059 - 028 Lensmannsskjerpet</b>

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	THE ORE DATABASE
	Occurence 5059 - 028 Lensmannsskjerpet
	(Object Id: 4343) (Last updated: 13.04.2020)

Location

County:

Trøndelag

Municipality:

Orkland (5059)

Map 1:50000:

Hølonda (1521-2)

Map 1:250000:

Trondheim

Coordinate system:

EU89-UTM Zone 32

East:

536286 m.

North:

6993529 m.

Longitude:

9.7181060

Latitude:

63.0694470

Show on map

Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Copper
			Element(s):	Cu

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Mineralization

Era: Paleozoic Period: Ordovician

Genesis: Volcex Form: Irregular

Main texture: Vein network Min. distribution: Irregular (scattered)

Main grain size: Medium grained (1-3 mm) Main alteration: Chloritisation

Strike/Dip: 260 / 40 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Trondheim Nappe Complex

Tectonic complex: Støren Nappe

Igneous complex:

Group: Støren Group Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Chlorite Major mineral (>10%)

Gangue mineral Mica Subordinate mineral (1-10%)

Gangue mineral Feldspar Subordinate mineral (1-10%)

Ore mineral Chalcopyrite Major mineral (>10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Pyrrhotite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Greenstone Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Information(s) in free text format

Free text

Lensmannsskjerpet er et relativt stort skjerp som ligger i en vestvendt brattskråning med tett vegetasjon. Det består av en hesteskoformet grop med åpning mot nordvest. Det er sprengt inn i en lengde og bredde på ca. 10 m, og en 8-10 m høy skjæring finnes i nordøst. De rikeste sulfidmineraliseringene; aggregater/årer av pyritt og kobberkis finnes i randsonen av en ca. 40 cm bred, middels- til grovkornet kvartsgang med orientering 260°/40° i mørk grønn, klorittisert grønnstein. I tillegg finnes også kobberkis og pyritt i tynne kvartsårer/-linser i grønnsteinen. Analyser viser at mineraliseringen er svakt anriket på kobolt.

Bibliography:

From NGU's Reference Archive:

Kjeldsen, Siv , 1984

En undersøkelse av sulfidmineraliseringer i Grefstadfjell og Resfjellområdene, Løkkenfeltet.

;NTH Bergavd.;AVHANDLING

Fieldsamples

Sample No. Sample type Miscellanrous

JS-M1924 Bedrock

Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Pyrite-chalcopyrite veinlets along quartz vein

No. of registrated element analyses = 1

JS-M1925 Dump

Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Chalcopyrite-pyrite in quartz veinlets in chlorite-rich greenstone

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 5059 - 028 Lensmannsskjerpet

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#

JS-M1924 Bedrock 13100 210 2 137 9 2.5 5.0

JS-M1925 Dump 36700 583 2 220 10 7.2 7.0

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

Sample No. Pt# Pd# As* Cd* Ba* Mo* Sn* Sb* Bi*

JS-M1924 -5.0 -1.0 29 1.4 50 6.70 0 0 0

JS-M1925 -5.0 -1.0 55 4.6 40 7.62 0 0 0

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

Sample No. Se* Ga* Ge* In* S% V* Cr* Mn* Fe%

JS-M1924 32.00 6.26 0.21 1.17 6.77 51 11 727 11.80

JS-M1925 59.00 11.45 0.31 2.80 8.03 74 22 866 15.85

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

Sample No. Th* U* W* Rb* Sr* Y* Zr* Nb* Ta*

JS-M1924 0.04 -0.10 -0 6.1 14.2 9.3 2 0.30 0.05

JS-M1925 0.10 -0.10 -0 5.9 13.1 25.5 10 1.40 0.14

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

Sample No. Cs* La* Ce* Li* Be* Na* Mg* Al* P*

JS-M1924 3.55 -0.50 1.19 2 0 0 1 1 130

JS-M1925 3.27 2.40 8.05 2 0 0 1 2 500

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

Sample No. K * Ca* Sc* Ti* Te* Hf* Re* Tl*

JS-M1924 0 0 5.60 0 0.63 0.10 16 0

JS-M1925 0 0 11.40 0 0.74 0.40 13 0

Era:	Paleozoic	Period:	Ordovician
Genesis:	Volcex	Form:	Irregular
Main texture:	Vein network	Min. distribution:	Irregular (scattered)

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

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Chlorite	Major mineral (>10%)
Gangue mineral	Mica	Subordinate mineral (1-10%)
Gangue mineral	Feldspar	Subordinate mineral (1-10%)
Ore mineral	Chalcopyrite	Major mineral (>10%)
Ore mineral	Pyrite	Major mineral (>10%)
Ore mineral	Pyrrhotite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Host rock	Greenstone	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS-M1924	Bedrock	13100	210	2	137	9	2.5	5.0
JS-M1925	Dump	36700	583	2	220	10	7.2	7.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
JS-M1924	-5.0	-1.0	29	1.4	50	6.70	0	0	0
JS-M1925	-5.0	-1.0	55	4.6	40	7.62	0	0	0

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
JS-M1924	32.00	6.26	0.21	1.17	6.77	51	11	727	11.80
JS-M1925	59.00	11.45	0.31	2.80	8.03	74	22	866	15.85

Sample No.	Th*	U*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*
JS-M1924	0.04	-0.10	-0	6.1	14.2	9.3	2	0.30	0.05
JS-M1925	0.10	-0.10	-0	5.9	13.1	25.5	10	1.40	0.14

Sample No.	Cs*	La*	Ce*	Li*	Be*	Na*	Mg*	Al*	P*
JS-M1924	3.55	-0.50	1.19	2	0	0	1	1	130
JS-M1925	3.27	2.40	8.05	2	0	0	1	2	500

Sample No.	K *	Ca*	Sc*	Ti*	Te*	Hf*	Re*	Tl*
JS-M1924	0	0	5.60	0	0.63	0.10	16	0
JS-M1925	0	0	11.40	0	0.74	0.40	13	0