Faktarka for Forekomstområde 1653

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	MALMDATABASEN
	Forekomstområde 1653 - 011
	(Sist oppdatert 08.aug.2022)

Navn på deposit area : Brannberget

(Objekt Id : 1653,011,00,00)

Lokalisering

Fylke :

Sør-Trøndelag (16)

Kommune :

Melhus (1653)

Kart 1:50000:

Trondheim (1621-4)

Kart 1:250000:

Trondheim

Markeringspunkt:

Lengdegrad:

10.3159730

Breddegrad:

63.2785650

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-koord:

566017 m.

Y-koord:

7017303 m.

Materialtype

	Hovedtype:	Basemetaller (Cu,Zn,Pb,Fe sulfider,As,Sb,Bi,Sn)	Subtype:	Sulfider
			Element(s):	Kis Cu

Production

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

Betydning

Offentlig: Not Assessed (reg. 18.02.2015)

Economical: Lite viktig , (Confirmed 05.nov.2021 by Jan Sverre Sandstad)

Mineralization

Era: Paleozoic Period: Ordovician

Dating: Method:

Genesis: Vulkeks Form: Uregelmessig

Main texture: Strukturløs Min. distribution: Disseminert

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

Strike/Dip: 200 / 85 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Trondheim Nappe Complex

Tectonic complex: LVB ofiolitt fragmenter

Igneous complex:

Group: Formation: Bymarkgrønnsteinen

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Feldspar Major mineral (>10%)

Gangue mineral Quartz Subordinate mineral (1-10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Metagabbro Intrusive
Original rock :Gabbro

Metamorphic facies :Greenschist

Structures

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

Host rock Joints/Fractures Strike/Dip :200 / 85 Syn-mineralisation ;...Effect :Modifies

Opplysning(er) i fritekstformat

Fri tekst

Forekomsten består av en liten, halvringformet tunell som er sprengt ut i bunnen av en 4 m høy østvendt skrent nær en tursti vest for Lodda/Loddbekken. Avstanden mellom tunellåpningene er ca. 5 m. Inngangen i sør er opptil 2 m bred og 1,5 m høy, mens den nordlige inngangen er mye mindre. Den er anlagt i en rustfarget sone i silisifisert metagabbro. Sulfidmineraliseringene består disseminasjon og aggregater av svovelkis og mindre mengder kobberkis. En prøve inneholder 0,2 % kobber.

Fieldsamples

Sample No. Sample type Miscellanrous

Brannberget-1 Bedrock

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

Kommentar :Disseminasjon av finkornet pyritt+kobberkis i silisifisert gabbro

No. of registrated element analyses = 1

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

Analyse Results

from

Forekomstområde 1653 - 011 Brannberget

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#

Brannberget-1 Bedrock 1930 48 1 22 10 .7 16.0

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

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

Brannberget-1 -5.0 1.0 42 .1 280 2.11 1 0 0

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

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

Brannberget-1 3.00 23.20 0.05 0.26 1.16 10 14 501 3.73

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

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

Brannberget-1 3.09 0.70 0 13.7 37.4 128.5 93 5.70 0.44

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

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

Brannberget-1 0.35 20.70 59.20 3 1 32400 1700 58300 60

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

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

Brannberget-1 8900 2900 4.40 970 0.08 3.50 0 0

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

	Province:	Caledonides
	Geotec.unit:	Trondheim Nappe Complex
	Tectonic complex:	LVB ofiolitt fragmenter
	Igneous complex:

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

Relationship	Rock	Origin
Host rock	Metagabbro	Intrusive Original rock :Gabbro
		Metamorphic facies :Greenschist

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Joints/Fractures	Strike/Dip :200 / 85	Syn-mineralisation ;...Effect :Modifies

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
Brannberget-1	Bedrock	1930	48	1	22	10	.7	16.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
Brannberget-1	-5.0	1.0	42	.1	280	2.11	1	0	0

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
Brannberget-1	3.00	23.20	0.05	0.26	1.16	10	14	501	3.73

Sample No.	Th*	U*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*
Brannberget-1	3.09	0.70	0	13.7	37.4	128.5	93	5.70	0.44

Sample No.	Cs*	La*	Ce*	Li*	Be*	Na*	Mg*	Al*	P*
Brannberget-1	0.35	20.70	59.20	3	1	32400	1700	58300	60

Sample No.	K *	Ca*	Sc*	Ti*	Te*	Hf*	Re*	Tl*
Brannberget-1	8900	2900	4.40	970	0.08	3.50	0	0