Fact Sheet for Deposit Area 605

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 605 - 029
	(Last updated 19.jan.2017)

Name of Deposit Area : Skjerpevika

(Object Id : 0605,029,00,00)

The deposit area belongs to the Province : Holleia

Location

County :

Buskerud (06)

Municipality :

Ringerike (0605)

Map 1:50000:

Hønefoss (1815-3)

Map 1:250000:

Hamar

Marking point:

Longitude:

10.0451740

Latitude:

60.1083730

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

558104 m.

Y-coord:

6663940 m.

Commodity

	Main Type:	Ferroalloys (Cr,Ni,Co,V,Mo,W)	Sub Type:	Nickel
			Element(s):	Ni Cu

Production

Activity:	Mining	Reserves:
Prod. method:	Underground mining	Production:
Prod. status:	Disused, closed	Volume of dump:	75 m3

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest , (Confirmed 16.feb.2005 by Havard Gautneb)

Mineralization

Era: Proterozoic Period: Mesoproterozoic

Dating: Method:

Genesis: Orthomagmatic formation Form: Irregular

Main texture: Vein network Min. distribution: Semi-massive (20-50 % ore minerals)

Main grain size: Very unevenly grained Main alteration: Silicification

Strike/Dip: 59 / 55 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period: Mesoproterozoic

Province: South Norwegian Basement Province

Geotec.unit: Kongsberg Complex

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Plagioclase Subordinate mineral (1-10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Gangue mineral Hornblende Subordinate mineral (1-10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Gangue mineral Chlorite Accessory mineral (<1%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Chalcopyrite Accessory mineral (<1%)

Ore mineral Marcasite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Wall rock Granitic gneiss Intrusive
Original rock :Granite

Metamorphic facies :Amphibolite

Structures

Location: Type: Orientation(360 gr.): Relation to min.:

Host rock Foliation Strike/Dip :59 / 55 Post-mineralisation ;...Effect :Modifies

Wall rock Foliation Strike/Dip :35 / 85 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Skjerpevika forekomst består av en synk i kanten av en vei ned til en hytte ved Væleren. Synken er fylt med kvist og er vannfylt. Den er ca. 3x3 m i omkrets. den nylagte veien går gjennom og har rasert tipphaugen og noe tippmateriale finnes 20 m lenger ned på utsiden av sving i veien. I bakveggen av synken er det tynne slirer med sulfider i silisifisert amfibol-biotitt gneis. På tipphaugen er det årenettverk av vesentlig pyritt i kvarts-biotitt-granat-amfibolbergart, men også litt kobberkis. Det finnes også blokker med mer semimassiv til massiv mineralisering. Sidebergart er granittisk gneis.

Bibliography:

From NGU's Reference Archive:

Vokes, F.M.; Vrålstad, T. , 1969

Rapport over feltarbeidene i Ringerike, sommeren 1969

;Norsk Hydro / NGU;RAPPORT;NH-arkivet; No.NH 52;38+kart pages

Abstract:

Sommerens arbeide har gitt en meget god innsikt i opptreden av de Ni-Cu førende sulfidiske forekomster i en betydelig del av Ringerikes nikkelmalmprovins. Arbeidet, som har vært av rekognoserende natur pga begrenset antall medarbeidere og tid, har ført til forståelse av forekomstmåte ved de fleste viktige gruver og skjerp. Omtalte og befarte forekomster: Grefsrud skjerp, Ertelien, Skjerpevik gruve, Kauserud skjerp, Ullentjern skjerp, Orretjern skjerp,Skog (Skaug) gruve, Tysklands gruve, Langedals gruve (inkl. Bekken og Støvern gruver), Støverntangen gruve. Fins også i BV-arkivet (DMFs database for undersøkelsesrapporter) merket BV 1345.

Fieldsamples

Sample No. Sample type Miscellanrous

RING-14 Dump

Sampler :T. Bjerkgård/...Stored :Løkken

Comment :Pyrite vein network in quartz-amphibole-garnet rock

No. of registrated element analyses = 1

RING-15 Dump

Sampler :T. Bjerkgård/...Stored :Løkken

Comment :Semimassive pyrite ore

No. of registrated element analyses = 1

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

Name of Locality : Skjerpevika

(Object Id : 0605,029,01,00)

Location

County : Buskerud (06) Municipality : Ringerike (0605)

Map 1:50000: Hønefoss (1815-3) Map 1:250000: Hamar

Marking point: Longitude: 10.0450020 Latitude: 60.1057700

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-coord: 558100 m. Y-coord: 6663650 m.

Commodity

Main Type: Ferroalloys (Cr,Ni,Co,V,Mo,W) Sub Type: Nickel

Element(s): Ni Cu

Production

Activity: Pitting Reserves:

Prod. method: Production:

Prod. status: Volume of dump: 15 m3

Operations

From - To Activity Comments

Pitting

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Plagioclase Subordinate mineral (1-10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Ore mineral Pyrite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Wall rock Banded gneiss

Metamorphic facies :Amphibolite

Structures

Location: Type: Orientation(360 gr.): Relation to min.:

Wall rock Foliation Strike/Dip :172 / 85 Pre-mineralisation ;...Effect :Controls

Information(s) in free text format

Free text

Det ble funnet en røskegrøft ca.20 m inn fra bunnen av vika. Grøfta er om lag 5 m lang i NØ-SV retning, inntil 3 m bred og 1-2 m dyp. Mineralisering er meget svak og består av spredte mm-store korn av pyritt i amfibol-kvartsgneiss og for øvrig noe biotitt og plagioklas. Stedvis er pyritt anriket i tynne "riss" på tvers av foliasjonen, tydeligvis remobilisert.

Fieldsamples

Sample No. Sample type Miscellanrous

BU0383.01 Dump

Sampler :T. Bjerkgård/I. Henderson/...Stored :Løkken/...Size(kg) :3

Comment :Very weak pyrite impregnation in amphibole-bearing quartzrich gneiss

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 605 - 029 Skjerpevika

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#

BU0383.01 Dump 255 84 11 21 37 .2 8.0

RING-14 Dump 7800 422 60 409 7950 7.4 230.0

RING-15 Dump 710 82 65 875 18300 7.8 168.0

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

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

BU0383.01 1.0 1.0 36 .2 84 1.00 4 2

RING-14 9.0 46.0 12 3.2 100 1.00 1 4 1

RING-15 -5.0 260.0 21 .5 60 12.00 -1 6 2

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

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

BU0383.01 .88 40 57 433 3.60

RING-14 17.00 9.00 -1.00 -1.00 243 114 1450 16.90

RING-15 44.00 5.00 -1.00 -1.00 85 91 153 34.60

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

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

BU0383.01 1.00 4.00 4 134.0

RING-14 -1.00 -1.00 -1 14.0 130.0 7.0 6 1.00 -1.00

RING-15 -1.00 -1.00 -1 -1.0 2.0 3.0 4 -1.00 -1.00

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

Sample No. Cs* La* Ce* B* Li* Be* Sc* Ti* Te*

BU0383.01 10.00 3

RING-14 5.00 3.00 6.00 30 -1 29.00 1780 1.00

RING-15 -1.00 3.00 10.00 7 -1 3.00 940 3.00

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

Sample No. Hf* Re* Tl*

BU0383.01

RING-14 -1.00 -1 3

RING-15 -1.00 -1 2

Era:	Proterozoic	Period:	Mesoproterozoic
Dating:		Method:
Genesis:	Orthomagmatic formation	Form:	Irregular
Main texture:	Vein network	Min. distribution:	Semi-massive (20-50 % ore minerals)

	Province:	South Norwegian Basement Province
	Geotec.unit:	Kongsberg Complex
	Tectonic complex:
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Plagioclase	Subordinate mineral (1-10%)
Gangue mineral	Garnet	Subordinate mineral (1-10%)
Gangue mineral	Hornblende	Subordinate mineral (1-10%)
Gangue mineral	Biotite	Subordinate mineral (1-10%)
Gangue mineral	Chlorite	Accessory mineral (<1%)
Ore mineral	Pyrite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Accessory mineral (<1%)
Ore mineral	Marcasite	Accessory mineral (<1%)

Relationship	Rock	Origin
Wall rock	Granitic gneiss	Intrusive Original rock :Granite
		Metamorphic facies :Amphibolite

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Host rock	Foliation	Strike/Dip :59 / 55	Post-mineralisation ;...Effect :Modifies
Wall rock	Foliation	Strike/Dip :35 / 85	Post-mineralisation ;...Effect :Modifies

Activity:	Pitting	Reserves:
Prod. method:		Production:
Prod. status:		Volume of dump:	15 m3

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
BU0383.01	Dump	255	84	11	21	37	.2	8.0
RING-14	Dump	7800	422	60	409	7950	7.4	230.0
RING-15	Dump	710	82	65	875	18300	7.8	168.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
BU0383.01	1.0	1.0	36	.2	84	1.00		4	2
RING-14	9.0	46.0	12	3.2	100	1.00	1	4	1
RING-15	-5.0	260.0	21	.5	60	12.00	-1	6	2

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
BU0383.01					.88	40	57	433	3.60
RING-14	17.00	9.00	-1.00	-1.00		243	114	1450	16.90
RING-15	44.00	5.00	-1.00	-1.00		85	91	153	34.60

Sample No.	Cs*	La*	Ce*	B*	Li*	Be*	Sc*	Ti*	Te*
BU0383.01		10.00		3
RING-14	5.00	3.00	6.00		30	-1	29.00	1780	1.00
RING-15	-1.00	3.00	10.00		7	-1	3.00	940	3.00