Fact Sheet for Deposit Area 914

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 914 - 018
	(Last updated 18.jun.2001)

Name of Deposit Area : Langang

(Object Id : 0914,018,00,00)

Location

County :

Aust-Agder (09)

Municipality :

Tvedestrand (0914)

Map 1:50000:

Tvedestrand (1612-2)

Map 1:250000:

Arendal

Marking point:

Longitude:

8.9042510

Latitude:

58.5665710

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

494430 m.

Y-coord:

6491795 m.

Commodity

	Main Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Sub Type:	Copper
			Element(s):	Kis Cu

Production

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

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest , (Confirmed 23.feb.2001 by Jan Sverre Sandstad)

Operations

From - To Activity Comments

2000 - 2000 Sampling Company/Institution :NGU

Mineralization

Era: Proterozoic Period: Mesoproterozoic

Dating: Method:

Genesis: Hydrothermal vein Form: Irregular

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

Main grain size: Fine grained (< 1 mm) Main alteration: No country rock alteration

Strike/Dip: 48 / 70 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period: Mesoproterozoic

Province: South Norwegian Basement Province

Geotec.unit: Bamble Complex

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Biotite Major mineral (>10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Pegmatite Intrusive
Original rock :Granite pegmatite

Metamorphic facies :Amphibolite

Host rock Biotite schist Sedimentary

Metamorphic facies :Amphibolite

Structures

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

Host rock Foliation Strike/Dip :48 / 70 Pre-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Skjerpet ligger tett ved en sti ca. 4-500 nord for gårdene på Langang. Det består av en utsprengt grop (3x3 m) i en fjellknaus med tippvolum på ca. 15 m3. Ingen opplysninger om den tidligere aktiviteten foreligger. Forekomsten er ubetydelig både i størrelse og gehalt. Mineraliseringen består av en smal (1-3 cm) pyritt-kobberkis åre i biotittskifer (prøve .01) i tilknytning til feltspatrik (amazonitt) pegmatitt som også fører svak sulfiddisseminasjon (.02). Åra har retning 70º/55º og skjærer foliasjonen i biotittskiferen (48º/70º). Biotittskiferen er svært rustfarget og har mange konkordante kvartsslirer/-årer. Kontaktsonen til pegmatitten innerst i gropa er svært glimmerrik og har retning 30º/80º.

Fieldsamples

Sample No. Sample type Miscellanrous

AA0130.01 Bedrock

Sampler :J.S. Sandstad/...Stored :Løkken

Comment :Finkornet pyritt-kobberkis åre i grovkornet biotittskifer med svak sulfiddiseminasjon.

No. of registrated element analyses = 1

AA0130.02 Bedrock

Sampler :P.M. Ihlen/...Stored :Løkken

Comment :Svak disseminasjon av pyritt og magnetkis i grønnlig feltspat pegmatittåre i migmatittisk biotitt gneis.

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 914 - 018 Langang

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#

AA0130.01 Bedrock 907 87 21 359 379 1.2 23.0

AA0130.02 Bedrock 434 72 12 26 32 .3 7.0

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

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

AA0130.01 1.0 15.0 50 .7 36 39.00 2 2 18.30

AA0130.02 1.0 1.0 1 .1 182 9.00 4 3 1.31

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

Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*

AA0130.01 80 76 513 26.51 2.00 13.00 3 6.0 16.00

AA0130.02 62 55 165 4.62 5.00 4.00 2 8.0 15.00

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

Sample No. B*

AA0130.01 2

AA0130.02 3

	From - To	Activity	Comments
	2000 - 2000	Sampling	Company/Institution :NGU

Era:	Proterozoic	Period:	Mesoproterozoic
Dating:		Method:
Genesis:	Hydrothermal vein	Form:	Irregular
Main texture:	Foliated	Min. distribution:	Disseminated (<20 % ore minerals)

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

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Biotite	Major mineral (>10%)
Ore mineral	Pyrite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Host rock	Pegmatite	Intrusive Original rock :Granite pegmatite
		Metamorphic facies :Amphibolite
Host rock	Biotite schist	Sedimentary
		Metamorphic facies :Amphibolite

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Foliation	Strike/Dip :48 / 70	Pre-mineralisation ;...Effect :None

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
AA0130.01	Bedrock	907	87	21	359	379	1.2	23.0
AA0130.02	Bedrock	434	72	12	26	32	.3	7.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
AA0130.01	1.0	15.0	50	.7	36	39.00	2	2	18.30
AA0130.02	1.0	1.0	1	.1	182	9.00	4	3	1.31

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
AA0130.01	80	76	513	26.51	2.00	13.00	3	6.0	16.00
AA0130.02	62	55	165	4.62	5.00	4.00	2	8.0	15.00