Faktarka for Forekomstområde 238

					English version
	MALMDATABASEN
	Forekomstområde 238 - 019
	(Sist oppdatert 19.des.2022)

Navn på deposit area : Østbyvangen

(Objekt Id : 0238,019,00,00)

Lokalisering

Fylke :

Akershus (02)

Kommune :

Nannestad (0238)

Kart 1:50000:

Nannestad (1915-3)

Kart 1:250000:

Hamar

Markeringspunkt:

Lengdegrad:

10.9062720

Breddegrad:

60.1462390

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

605847 m.

Y-koord:

6669225 m.

Materialtype

	Hovedtype:	Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W)	Subtype:	Molybden
			Element(s):	Mo Fe

Production

Activity:	Røsking	Reserves:
Prod. method:		Production:
Prod. status:		Volume of dump:	150 m3

Betydning

Offentlig: Not Assessed (reg. 18.02.2015)

Economical: Lite viktig , (Confirmed 30.aug.2021 by Jan Sverre Sandstad)

Mineralization

Era: Paleozoic Period: Permian

Dating: Method:

Genesis: Skarnmalm Form: Uregelmessig

Main texture: Strukturløs Min. distribution: Disseminert

Main grain size: Finkornet (<1 mm) Main alteration: Skarnomvandling

Strike/Dip: 45 / 50 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Cambrian

Province: Oslo Region

Geotec.unit: Akershus Graben

Tectonic complex:

Igneous complex: Nordmarka-Hurdal Batholith

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Garnet Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Gangue mineral Calcite Subordinate mineral (1-10%)

Ore mineral Molybdenite Major mineral (>10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Magnetite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Granat-feltspat skarn Sedimentary
Original rock :Limestone

Metamorphic facies :Contact

Wall rock Biotitthornfels Sedimentary
Original rock :Argillaceous sediment

Metamorphic facies :Contact

Structures

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

Wall rock Mineral banding Strike/Dip :45 / 50 Pre-mineralisation ;...Effect :Controls

Opplysning(er) i fritekstformat

Fri tekst

Forekomsten ligger i den NØ-delen av Kirkebyfeltet som domineres av hornfels, som er omdannede kambriske til undersiluriske slambergarter med kalksteinlinser. Arbeidene består av to dels vannfylte, relativt grunne dagskjæringer/groper orientert NØ-SV over en lengde på ca. 35 m. Malmsonen er ikke blottet, men mørk biotitthornfels finnes stedvis i veggene. Mellom gropene finnes en tipp med volum ca. 150 kbm. Mineraliseringene består av disseminasjon av finkornet molybdenglans i fin- til middelskornet granat?-feltspat-kalkspatskarn og magnetitt-svovelkis i båndet granat?-pyroksenskarn.

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-OS2116 Dump

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

Kommentar :Molybdenglans disseminasjon i granat?-feltspat-kalkspat skarn

No. of registrated element analyses = 1

JS-OS2117 Dump

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

Kommentar :Magnetitt-svovelkis, båndet i granat-pyroksen?skarn

No. of registrated element analyses = 1

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

Navn på locality : Østbyvangen vest

(Objekt Id : 0238,019,01,00)

Lokalisering

Fylke : Akershus (02) Kommune : Nannestad (0238)

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

Markeringspunkt: Lengdegrad: 10.9038370 Breddegrad: 60.1455460

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-koord: 605715 m. Y-koord: 6669143 m.

Materialtype

Hovedtype: Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W) Subtype: Molybden

Element(s): Mo Fe

Production

Activity: Røsking Reserves:

Prod. method: Production:

Prod. status: Volume of dump: 20 m3

Mineralogy

Relationship Mineral Amount

Gangue mineral Pyroxene Major mineral (>10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Magnetite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Host rock Granat-pyroksen skarn Sedimentary
Original rock :Limestone

Metamorphic facies :Contact

Opplysning(er) i fritekstformat

Fri tekst

Skjerpet består av en grunn, vannfylt grop med vegger på 8 og 2-4 m. I blokker på tippen dominerer svovelkis-magnetitt mineralisert granat-pyroksenskarn som i hovedskjerpet. Molybdenglans ble ikke påvist.

Fieldsamples

Sample No. Sample type Miscellanrous

JS-OS2118 Dump

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

Kommentar :Svovelkis-magnetitt i svart hornfels og granatskarn?

No. of registrated element analyses = 1

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

Analyse Results

from

Forekomstområde 238 - 019 Østbyvangen

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-OS2116 Dump 2 147 14 9 21 .1 7.0

JS-OS2117 Dump 753 653 10 118 86 2.4 21.0

JS-OS2118 Dump 12 69 30 71 29 .3 -.5

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

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

JS-OS2116 -2.5 1.0 18 .3 -10 1075.00 25 7 3

JS-OS2117 7.0 -.5 58 2.4 20 6.29 11 9 25

JS-OS2118 -2.5 -.5 9 .1 30 1.30 5 0 3

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

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

JS-OS2116 1.00 16.75 0.22 0.95 .09 70 32 9630 8.78

JS-OS2117 8.00 9.15 0.20 1.62 4.65 43 28 10100 20.60

JS-OS2118 2.00 9.01 0.28 0.14 9.22 58 21 10950 17.35

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

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

JS-OS2116 13.30 11 2.1 30.7 42.6 93 8.20 0.79 0.44

JS-OS2117 6.21 20 25.7 36.6 25.9 57 6.40 0.47 5.33

JS-OS2118 7.88 22 39.5 290.0 18.6 66 6.20 0.38 2.58

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

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

JS-OS2116 43.80 79.20 3 2 200 12800 55700 990 -10

JS-OS2117 18.70 31.50 7 1 300 11800 31800 1140 1200

JS-OS2118 7.20 14.00 3 3 800 9000 17400 1620 2400

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

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

JS-OS2116 ###### 11.60 3480 0.22 3.10 0 0

JS-OS2117 ###### 7.80 1830 5.75 1.90 -0 1

JS-OS2118 ###### 7.40 1510 0.22 1.70 -0 0

Era:	Paleozoic	Period:	Permian
Dating:		Method:
Genesis:	Skarnmalm	Form:	Uregelmessig
Main texture:	Strukturløs	Min. distribution:	Disseminert

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

Relationship	Mineral	Amount
Gangue mineral	Garnet	Major mineral (>10%)
Gangue mineral	Feldspar	Major mineral (>10%)
Gangue mineral	Calcite	Subordinate mineral (1-10%)
Ore mineral	Molybdenite	Major mineral (>10%)
Ore mineral	Pyrite	Major mineral (>10%)
Ore mineral	Magnetite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Host rock	Granat-feltspat skarn	Sedimentary Original rock :Limestone
		Metamorphic facies :Contact
Wall rock	Biotitthornfels	Sedimentary Original rock :Argillaceous sediment
		Metamorphic facies :Contact

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Mineral banding	Strike/Dip :45 / 50	Pre-mineralisation ;...Effect :Controls

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS-OS2116	Dump	2	147	14	9	21	.1	7.0
JS-OS2117	Dump	753	653	10	118	86	2.4	21.0
JS-OS2118	Dump	12	69	30	71	29	.3	-.5

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
JS-OS2116	-2.5	1.0	18	.3	-10	1075.00	25	7	3
JS-OS2117	7.0	-.5	58	2.4	20	6.29	11	9	25
JS-OS2118	-2.5	-.5	9	.1	30	1.30	5	0	3

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
JS-OS2116	1.00	16.75	0.22	0.95	.09	70	32	9630	8.78
JS-OS2117	8.00	9.15	0.20	1.62	4.65	43	28	10100	20.60
JS-OS2118	2.00	9.01	0.28	0.14	9.22	58	21	10950	17.35

Sample No.	Th*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*	Cs*
JS-OS2116	13.30	11	2.1	30.7	42.6	93	8.20	0.79	0.44
JS-OS2117	6.21	20	25.7	36.6	25.9	57	6.40	0.47	5.33
JS-OS2118	7.88	22	39.5	290.0	18.6	66	6.20	0.38	2.58

Sample No.	La*	Ce*	Li*	Be*	Na*	Mg*	Al*	P*	K *
JS-OS2116	43.80	79.20	3	2	200	12800	55700	990	-10
JS-OS2117	18.70	31.50	7	1	300	11800	31800	1140	1200
JS-OS2118	7.20	14.00	3	3	800	9000	17400	1620	2400

Sample No.	Ca*	Sc*	Ti*	Te*	Hf*	Re*	Tl*
JS-OS2116	######	11.60	3480	0.22	3.10	0	0
JS-OS2117	######	7.80	1830	5.75	1.90	-0	1
JS-OS2118	######	7.40	1510	0.22	1.70	-0	0