Fact Sheet for <b>Deposit 4227

					Norsk versjon
	THE ORE DATABASE
	Deposit 4227 - 023 Knaben II
	(Object Id: 5072) (Last updated: 22.12.2022)

Location

County:

Agder

Municipality:

Kvinesdal (4227)

Map 1:50000:

Fjotland (1412-3)

Map 1:250000:

Mandal

Coordinate system:

EU89-UTM Zone 32

East:

388353 m.

North:

6503594 m.

Longitude:

7.0755880

Latitude:

58.6582000

Show on map

Resource

	Resource Type:	Ferroalloys (Cr,Ni,Co,V,Mo,W)	Resource Subtype:	Molybdenium
			Element(s):	Mo

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Mining	Reserves:
	Operating method:	Open pit and underground mining	Historical production:	8710 thousand tons

Products

Element/product Crude ore grade or quality Reg. date

MoS2 0,21 % 18.10.2012

Operations

From - To Activity Comments

1916 - 1919 Test mining Company/Institution :Knaben Molybdængruber A/S

1923 - 1973 Regular production Company/Institution :Knaben Molybdængruber A/S

2006 - 2008 Test mining Company/Institution :Knaben Molybden A/S

Bergingeniør Andreas Sigersvold, daglig leder og hovedaksjonær,

Mineralization

Era: Proterozoic Period: Neoproterozoic

Dating: 996 (-4\+4) million year Method: Os/Re

Genesis: Porphyry-type Form:

Main texture: Vein network Min. distribution: Disseminated (<20 % ore minerals)

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

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period: Mesoproterozoic

Province: South Norwegian Basement Province

Geotec.unit: Agder Complex

Tectonic complex:

Igneous complex:

Group: Formation:

Information(s) in free text format

Free text

The Knaben deposits were mined for molybdenum from 1885 to 1973. Three mines have been in operation, Knaben I, Knaben II and Kvina with a total production about 8.6 Mt. The major, Knaben II mine was operated nearly continuously in the period 1918–1973 and produced 8 Mt of ore with 0.2 % Mo. Knaben II was reopened in the 2007 and small-scale mining with an annual production of 50,000 t of ore yielding 100 t molybdenite is planned. Molybdenite occurs both in and along quartz veins and as dissemination in various gneisses, with minor amounts of chalcopyrite and pyrite. The most important mineralisations commonly occur concordantly in association with sulphide-bearing gneisses (‘Fahlband’), augen gneiss and grey gneisses, along a 6 km strike and 1 km width. In the upper part of the Knaben II deposit, molybdenite mainly occurs as dissemination and along joints or veinlets in grey granitic gneisses, while in the southern part of the deposit, molybdenite is mainly located along 1–20 cm thick quartz veins, within the grey granitic gneiss. Carbonate is common in the core of the veins.

Fieldsamples

Sample No. Sample type Miscellanrous

JS-W2113 Bedrock

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

Comment: Molybdenite, fine-grained, weak dissemination in grey granite

No. of registrated element analyses = 1

JS-W2114 Bedrock

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

Comment: Molybdenite, aggregates/strong dissemination in grey granite

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 4227 - 023 Knaben II

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-W2113 Bedrock 261 28 29 2 2 .2 -1.0

JS-W2114 Bedrock 332 27 30 2 2 .2 -1.0

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

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

JS-W2113 -5.0 -1.0 -0 .1 590 840.00 1 0 0

JS-W2114 -5.0 -1.0 0 .1 530 3260.00 1 0 0

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

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

JS-W2113 1.00 17.10 0.10 0.04 .23 8 4 164 1.10

JS-W2114 1.00 17.40 0.14 0.04 .43 11 4 159 1.21

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

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

JS-W2113 12.85 1.70 3 277.0 167.5 8.6 95 9.60 0.66

JS-W2114 18.55 1.90 3 291.0 139.0 9.5 80 8.00 0.46

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

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

JS-W2113 1.38 37.50 72.90 20 2 18200 1300 57700 190

JS-W2114 0.91 54.50 106.50 21 2 17700 1300 57900 210

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

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

JS-W2113 41500 6300 1.90 1030 0.06 3.10 0 2

JS-W2114 43500 5200 1.90 930 0.11 2.60 0 2

	Element/product	Crude ore grade or quality	Reg. date
	MoS2	0,21 %	18.10.2012

From - To	Activity	Comments
1916 - 1919	Test mining	Company/Institution :Knaben Molybdængruber A/S
1923 - 1973	Regular production	Company/Institution :Knaben Molybdængruber A/S
2006 - 2008	Test mining	Company/Institution :Knaben Molybden A/S
		Bergingeniør Andreas Sigersvold, daglig leder og hovedaksjonær,

Era:	Proterozoic	Period:	Neoproterozoic
Dating:	996 (-4\+4) million year	Method:	Os/Re
Genesis:	Porphyry-type	Form:
Main texture:	Vein network	Min. distribution:	Disseminated (<20 % ore minerals)

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

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS-W2113	Bedrock	261	28	29	2	2	.2	-1.0
JS-W2114	Bedrock	332	27	30	2	2	.2	-1.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
JS-W2113	-5.0	-1.0	-0	.1	590	840.00	1	0	0
JS-W2114	-5.0	-1.0	0	.1	530	3260.00	1	0	0

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
JS-W2113	1.00	17.10	0.10	0.04	.23	8	4	164	1.10
JS-W2114	1.00	17.40	0.14	0.04	.43	11	4	159	1.21

Sample No.	Th*	U*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*
JS-W2113	12.85	1.70	3	277.0	167.5	8.6	95	9.60	0.66
JS-W2114	18.55	1.90	3	291.0	139.0	9.5	80	8.00	0.46

Sample No.	Cs*	La*	Ce*	Li*	Be*	Na*	Mg*	Al*	P*
JS-W2113	1.38	37.50	72.90	20	2	18200	1300	57700	190
JS-W2114	0.91	54.50	106.50	21	2	17700	1300	57900	210

Sample No.	K *	Ca*	Sc*	Ti*	Te*	Hf*	Re*	Tl*
JS-W2113	41500	6300	1.90	1030	0.06	3.10	0	2
JS-W2114	43500	5200	1.90	930	0.11	2.60	0	2