Fact Sheet for <b>Occurence 4227 - 033 Roma gruver</b>

					Norsk versjon
	THE ORE DATABASE
	Occurence 4227 - 033 Roma gruver
	(Object Id: 5082) (Last updated: 13.02.2024)

Location

County:

Agder

Municipality:

Kvinesdal (4227)

Map 1:50000:

Fjotland (1412-3)

Map 1:250000:

Mandal

Coordinate system:

EU89-UTM Zone 32

East:

388888 m.

North:

6505158 m.

Longitude:

7.0840180

Latitude:

58.6723670

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:	Test mining	Reserves:
	Operating method:	Underground mining	Historical production:

Operations

From - To Activity Comments

1915 - 1918 Test mining Company/Institution :A/S Roma Gruber

Mineralization

Genesis: Form:

Main texture: Min. distribution:

Main grain size: Main alteration:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Information(s) in free text format

Free text

Roma gruver består av flere undersøkelsesstoller sør og vest for Bergetjern. Hovedstollen ligger sør for tjernet og totalt ble det drevet 240 m med stoller uten at noe malm ble videre bearbeidet i perioden 1915-1918. En ca. 55 m lang stoll med retning 280° ble drevet inn under Mo-mineraliseringer i dagen uten at disse ble påvist i stollen (Holmsen 1961). Videre er det drevet stoller både mot nord og sør uten at rike mineraliseringer ble påvist. Mindre soner med disseminert molybdenglans i grå gneis og grovkornet molybdenglans tilknyttet dm-tykke, pegmatittiske kvartslinser i kontakt med slire-båndet gneis (‘tigergneis’) (Müller m.fl. 2016)

Bibliography:

From NGU's Reference Archive:

Müller, Axel; Henderson, Iain; Jourdan, Charles; Slagstad, Trond , 2016

Mineralization styles and formation temperatures of the Knaben molybdenum deposits, southern Norway

;Norges geologiske undersøkelse;RAPPORT;NGU-rapport; No.2015.030;59 pages

Abstract:

The report documents the lithologies and molybdenite mineralization exposed in underground mines of the Knaben molybdenum (Mo) mining district in Kvinesdal, Vest-Agder, SW Norway. Scanning electron microscope cathodoluminescence (SEM-CL) and trace element analyses of quartz by laser ablation inductively coupled mass Spectrometry (LA-ICP-MS) were performed on 37 quartz and quartz-bearing samples in order to better understand the P-T conditions during magma emplacement and Mo-mineralization.

Bugge, Arne , 1963

Norges molybdenforekomster.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.217;1-134 pages

Abstract:

The ore fields and individual deposits which are mentioned in the text are shown on the map, figure 2. For those areas where the deposits lie so close together that they cannot be shown separately on this map, detail maps have been drawn on larger scales. In the descriptions there will also be found special maps covering the most important molybdenum areas. An index of the deposits which are mentioned is arranged both alphabetically and according to the numbers on the map. The majority, including the most important, of the ore deposits in Southern Norway lie within a marked zone, which is shown on the map, figure 3. At varying periods of time different metals have characterised the long zone of ore deposits: titanium in the southwest, then molybdenum in the area from Gursli to Knaben, copper and molybdenum in Telemark, silver, zinc and lead from Kongsberg eastwards, and further to the east, molybdenum again. From the map, figure 4, it can be seen that the most important groups of deposits are situated to both sides of the granite-gneiss area of the mountanious region of Southern Norway and that they lie in migmatised gneisses along the southwest side and in the schists and quartzites of the Telemark supracrustal suite along the northeast side.

Holmsen, T. W. , 1961

Rapport over molybdenglansforekomster i Vestlandske distrikt i området Vest-Agder fylke samt herredene Lund og Sokndal i Rogaland.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 7513;178 pages

Abstract:

Rapporten er ordnet i tre deler. Del 1 gir oversikt over alle mutede skjerp i området (side 4-106). Del 2 gir driftsberetninger hentet fra Norges Bergverksdrift for de skjerp hvor det har vært undersøkelsesarbeid eller regulær drift (side 107-135). Del 3 gir tittel med korte sammendrag av rapporter fra de aktuelle steder som er beskrevet (side 136-158). Side 158-176 består av kartbilag i M 1:50 000. Tittel forts.: ... Rogaland fylke.

Fieldsamples

Sample No. Sample type Miscellanrous

JS-W2128 Bedrock

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

Comment: Molybdenite dissemination/aggregates in grey gneiss

No. of registrated element analyses = 1

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

Name of Locality: Roma øvre, nordre tunnel

(Object Id: 38437 33,01,00)

Location

County: Agder Municipality: Kvinesdal (4227)

Map 1:50000: Fjotland (1412-3) Map 1:250000: Mandal

County: (Unavailable)

Resource

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

Element(s): Mo

Resources and production

Activity: Test mining Reserves:

Operating method: Underground mining Historical production:

Information(s) in free text format

Free text

Forekomsten ligger på nordsida av et mindre, ØNØ-VSV orientert søkk i terrenget og består av en 12 m lang dagskjæring med retning 330° som fører inn til en stoll med retning 295°. Den er vannfylt etter 10 m hvor det også er en tverrstoll. Molybdenglans finnes tilknyttet kvarts-feltspatlinser langs kontakten mellom slire-båndet gneis og porfyrisk granitt. Store blokker med molybdenglans-belegg finnes på tippen som utgjør ca. 200 kubikkmeter. Søkket fortsetter videre vestsørvestover til Jelå gruve og skyldes erosjon av en 10-20 m dolerittgang.

Fieldsamples

Sample No. Sample type Miscellanrous

JS-W2127 Dump

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

Comment: Molybdenite dissemination/aggregates in quartz-feldspar pegmatite in contact with 'tiger'gneiss

No. of registrated element analyses = 1

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

Name of Locality: Roma øvre, søndre tunnel

(Object Id: 38438 33,02,00)

Location

County: Agder Municipality: Kvinesdal (4227)

Map 1:50000: Fjotland (1412-3) Map 1:250000: Mandal

County: (Unavailable)

Resource

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

Element(s): Mo

Resources and production

Activity: Test mining Reserves:

Operating method: Underground mining Historical production:

Information(s) in free text format

Free text

En mindre stollåpning er drevet 12 m mot sør på sørsida av et ØNØ-VSV orientert søkk i terrenget og ca. 35 m sør for nordre stoll. Samme type mineraliseringer med molybdenglans langs kvarts-feltspatårer finnes her. I tillegg opptrer Mo-mineraliserte årer i kontakt mot amfibolitt.

Analyse Results

from

Deposit Area 4227 - 033 Roma gruver

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-W2127 Dump 27 67 10 3 4 .1 -1.0

JS-W2128 Bedrock 84 37 36 1 4 .3 -1.0

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

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

JS-W2127 -5.0 2.0 1 .1 170 19250.00 1 0 0

JS-W2128 -5.0 1.0 0 .2 500 4040.00 1 0 0

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

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

JS-W2127 9.00 11.00 0.15 0.04 1.44 30 6 294 1.91

JS-W2128 1.00 14.10 0.08 0.03 .47 5 8 202 1.19

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

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

JS-W2127 18.10 1.20 5 62.2 99.5 10.4 127 5.00 0.22

JS-W2128 12.60 1.50 18 242.0 122.5 4.7 99 2.20 0.07

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

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

JS-W2127 0.87 100.00 187.00 19 2 11900 2500 29900 220

JS-W2128 0.94 31.40 66.80 4 2 15600 900 59400 60

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

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

JS-W2127 7200 7100 2.20 1680 0.92 4.00 1 1

JS-W2128 49200 3000 1.20 590 0.20 3.60 0 2

	From - To	Activity	Comments
	1915 - 1918	Test mining	Company/Institution :A/S Roma Gruber

	Genesis:		Form:
	Main texture:		Min. distribution:

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex:

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS-W2127	Dump	27	67	10	3	4	.1	-1.0
JS-W2128	Bedrock	84	37	36	1	4	.3	-1.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
JS-W2127	-5.0	2.0	1	.1	170	19250.00	1	0	0
JS-W2128	-5.0	1.0	0	.2	500	4040.00	1	0	0

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
JS-W2127	9.00	11.00	0.15	0.04	1.44	30	6	294	1.91
JS-W2128	1.00	14.10	0.08	0.03	.47	5	8	202	1.19

Sample No.	Th*	U*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*
JS-W2127	18.10	1.20	5	62.2	99.5	10.4	127	5.00	0.22
JS-W2128	12.60	1.50	18	242.0	122.5	4.7	99	2.20	0.07

Sample No.	Cs*	La*	Ce*	Li*	Be*	Na*	Mg*	Al*	P*
JS-W2127	0.87	100.00	187.00	19	2	11900	2500	29900	220
JS-W2128	0.94	31.40	66.80	4	2	15600	900	59400	60

Sample No.	K *	Ca*	Sc*	Ti*	Te*	Hf*	Re*	Tl*
JS-W2127	7200	7100	2.20	1680	0.92	4.00	1	1
JS-W2128	49200	3000	1.20	590	0.20	3.60	0	2