Fact Sheet for <b>Occurence 3232

					Norsk versjon
	THE ORE DATABASE
	Occurence 3232 - 005 Toketjern
	(Object Id: 6540) (Last updated: 19.12.2022)

Location

County:

Akershus

Municipality:

Nittedal (3232)

Map 1:50000:

Nannestad (1915-3)

Map 1:250000:

Hamar

Coordinate system:

EU89-UTM Zone 32

East:

604420 m.

North:

6667151 m.

Longitude:

10.8795270

Latitude:

60.1280020

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Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Test mining	Reserves:
	Operating method:	Open pit and underground mining	Historical production:

Mineralization

Era: Paleozoic Period: Permian

Genesis: Skarn formation Form: Lens

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

Main grain size: Fine grained (< 1 mm) Main alteration: Skarn formation

Strike/Dip: 90 / 40 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Oslo Region

Geotec.unit: Akershus Graben

Tectonic complex:

Igneous complex: Nordmarka-Hurdal Batholith

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Pyroxene Major mineral (>10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Ore mineral Sphalerite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Host rock Pyroxene-garnet skarn Sedimentary
Original rock :Limestone

Metamorphic facies :Contact

Wall rock Biotite hornfels Sedimentary
Original rock :Argillaceous sediment

Metamorphic facies :Contact

Information(s) in free text format

Free text

Forekomsten ligger i det såkalte Kirkebyfeltet som domineres av kambrisk til undersilurisk hornfels som er omdannede slambergarter med kalksteinlinser. Den består av en ca. 30 m lang og opptil 7-8 m dyp, V-Ø orientert dagskjæring i tett granskog, ca. 150 m sør for Toketjern. En 10-15 m lang stoll fortsetter videre mot vest. Malmsonen er 1-1,5 m bred, V-Ø orientert og med moderat fall mot sør. Den består av fin- til middelskornet sinkblende både i semimassive bånd og disseminert i grønn, pyroksen+granatskarn. Sidebergarten i heng og ligg er svart biotitthornfels som er minst 2 m mektig i heng. Tippen er ca. 20 m lang og inneholder omtrent 300 kbm.

Bibliography:

From NGU's Reference Archive:

Olerud, S. , 2002

Nannestad. Berggrunnskart; Nannestad; 19153; 1:50 000; Foreløpig utgave plotteversjon

;Norges geologiske undersøkelse;KART;1 kart pages

Fieldsamples

Sample No. Sample type Miscellanrous

JS-OS2112 Bedrock

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

Comment: Sphalerite, semi-massive/band/dissemination diopsid-garnet skarn

No. of registrated element analyses = 1

JS-OS2113 Dump

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

Comment: Sphalerite, banded in hedenbergite-garnet skarn

No. of registrated element analyses = 1

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

Name of Locality: Toketjern vest

(Object Id: 38212 5,01,00)

Location

County: Akershus Municipality: Nittedal (3232)

Map 1:50000: Nannestad (1915-3) Map 1:250000: Hamar

Coordinate system: EU89-UTM Zone 32

East: 604303 m. North: 6667241 m.

Longitude: 10.8774680 Latitude: 60.1288310

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Resource

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

Element(s): Zn

Resources and production

Activity: Pitting Reserves:

Operating method: Historical production:

Information(s) in free text format

Free text

Forekomsten består av en 15 m lang dagskjæring med retning 255°. Kun svak sinkblende mineralisering er observert i skjæringen og på den svært overgrodde tippen.

Name of Locality: Toketjern nord

(Object Id: 38213 5,02,00)

Location

County: Akershus Municipality: Nittedal (3232)

Map 1:50000: Nannestad (1915-3) Map 1:250000: Hamar

Coordinate system: EU89-UTM Zone 32

East: 604349 m. North: 6667516 m.

Longitude: 10.8784190 Latitude: 60.1312960

Show on map

Resource

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

Element(s): Zn

Resources and production

Activity: Test mining Reserves:

Operating method: Open pit mining Historical production:

Mineralogy

Relationship Mineral Amount

Gangue mineral Pyroxene Major mineral (>10%)

Gangue mineral Feldspar Subordinate mineral (1-10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Ore mineral Sphalerite Major mineral (>10%)

Ore mineral Pyrrhotite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Hedenbergite skarn Sedimentary
Original rock :Limestone

Metamorphic facies :Contact

Wall rock Biotite hornfels Sedimentary
Original rock :Argillaceous sediment

Metamorphic facies :Contact

Information(s) in free text format

Free text

En 12 m lang og 2-3 m bred dagskjæring med retning 270° finnes i østskråningen ned mot nordenden av Toketjern. Skjæringen er opptil 5-6 m dyp og har også et mindre innhugg lengst i vest. Mørk grå til svart biotitthornfels med lokalt noe magnetkis på stikk og årer dominerer i veggene. Malmsonen er linseformet og opptil 0,5 m mektig og består av semimassiv til disseminert sinkblende i grønn, finkornet hedenbergittskarn. På tippen finnes også prøver med sinkblende i pyroksen-plagioklas+granatskarn.

Fieldsamples

Sample No. Sample type Miscellanrous

JS-OS2110 Bedrock

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

Comment: Sphalerite, semi-massive/dissmination in hedenbergite skarn

No. of registrated element analyses = 1

JS-OS2111 Dump

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

Comment: Sphalerite, semi-massive/dissmination in hedenbergite skarn

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 3232 - 005 Toketjern

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-OS2110 Bedrock 98 11250 32 25 28 .6 -.5

JS-OS2111 Dump 1075 18300 11 106 64 .8 2.0

JS-OS2112 Bedrock 14 94400 28 134 15 .9 -.5

JS-OS2113 Dump 18 46700 22 93 17 .4 1.0

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

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

JS-OS2110 -2.5 -.5 1 71.3 30 73.90 2 0 42

JS-OS2111 -2.5 -.5 2 121.0 20 215.00 6 0 63

JS-OS2112 -2.5 -.5 4 389.0 -10 1.18 2 0 88

JS-OS2113 -2.5 -.5 2 186.5 -10 16.75 1 0 34

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

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

JS-OS2110 2.00 8.29 3.64 2.35 .92 156 -1 29800 32.10

JS-OS2111 3.00 12.10 2.08 2.32 .89 204 17 37300 27.80

JS-OS2112 10.00 6.56 0.16 0.39 5.13 53 17 28200 10.70

JS-OS2113 5.00 4.67 0.13 0.22 2.63 34 11 38400 12.40

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

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

JS-OS2110 0.18 5 40.0 60.9 53.3 3 0.80 -0.05 12.90

JS-OS2111 6.00 4 43.3 214.0 26.8 30 6.90 0.44 14.00

JS-OS2112 3.90 11 0.4 25.5 18.7 36 4.30 0.31 0.16

JS-OS2113 2.38 3 0.5 52.9 11.1 19 2.50 0.18 0.10

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

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

JS-OS2110 5.70 12.90 0 8 700 9500 14200 10 1500

JS-OS2111 25.90 48.20 2 14 700 15400 28500 260 1400

JS-OS2112 17.00 31.50 2 1 300 6200 23900 230 -10

JS-OS2113 9.90 18.60 2 2 500 15600 12000 170 -10

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

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

JS-OS2110 60800 9.90 160 0.97 0.10 0 0

JS-OS2111 70200 10.20 1800 0.85 1.00 0 0

JS-OS2112 ###### 4.10 1230 1.35 1.00 -0 0

JS-OS2113 ###### 2.30 760 1.02 0.50 0 -0

Era:	Paleozoic	Period:	Permian
Genesis:	Skarn formation	Form:	Lens
Main texture:	Structureless	Min. distribution:	Semi-massive (20-50 % ore minerals)

	Province:	Oslo Region
	Geotec.unit:	Akershus Graben
	Tectonic complex:
	Igneous complex:	Nordmarka-Hurdal Batholith

Relationship	Mineral	Amount
Gangue mineral	Pyroxene	Major mineral (>10%)
Gangue mineral	Garnet	Subordinate mineral (1-10%)
Ore mineral	Sphalerite	Major mineral (>10%)

Relationship	Rock	Origin
Host rock	Pyroxene-garnet skarn	Sedimentary Original rock :Limestone
		Metamorphic facies :Contact
Wall rock	Biotite hornfels	Sedimentary Original rock :Argillaceous sediment
		Metamorphic facies :Contact

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS-OS2110	Bedrock	98	11250	32	25	28	.6	-.5
JS-OS2111	Dump	1075	18300	11	106	64	.8	2.0
JS-OS2112	Bedrock	14	94400	28	134	15	.9	-.5
JS-OS2113	Dump	18	46700	22	93	17	.4	1.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
JS-OS2110	-2.5	-.5	1	71.3	30	73.90	2	0	42
JS-OS2111	-2.5	-.5	2	121.0	20	215.00	6	0	63
JS-OS2112	-2.5	-.5	4	389.0	-10	1.18	2	0	88
JS-OS2113	-2.5	-.5	2	186.5	-10	16.75	1	0	34

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
JS-OS2110	2.00	8.29	3.64	2.35	.92	156	-1	29800	32.10
JS-OS2111	3.00	12.10	2.08	2.32	.89	204	17	37300	27.80
JS-OS2112	10.00	6.56	0.16	0.39	5.13	53	17	28200	10.70
JS-OS2113	5.00	4.67	0.13	0.22	2.63	34	11	38400	12.40

Sample No.	Th*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*	Cs*
JS-OS2110	0.18	5	40.0	60.9	53.3	3	0.80	-0.05	12.90
JS-OS2111	6.00	4	43.3	214.0	26.8	30	6.90	0.44	14.00
JS-OS2112	3.90	11	0.4	25.5	18.7	36	4.30	0.31	0.16
JS-OS2113	2.38	3	0.5	52.9	11.1	19	2.50	0.18	0.10

Sample No.	La*	Ce*	Li*	Be*	Na*	Mg*	Al*	P*	K *
JS-OS2110	5.70	12.90	0	8	700	9500	14200	10	1500
JS-OS2111	25.90	48.20	2	14	700	15400	28500	260	1400
JS-OS2112	17.00	31.50	2	1	300	6200	23900	230	-10
JS-OS2113	9.90	18.60	2	2	500	15600	12000	170	-10

Sample No.	Ca*	Sc*	Ti*	Te*	Hf*	Re*	Tl*
JS-OS2110	60800	9.90	160	0.97	0.10	0	0
JS-OS2111	70200	10.20	1800	0.85	1.00	0	0
JS-OS2112	######	4.10	1230	1.35	1.00	-0	0
JS-OS2113	######	2.30	760	1.02	0.50	0	-0