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	Occurence 0 - 000 FEIL
	(Object Id: ) (Last updated: 10.06.2015)

Operations

	From - To	Activity	Comments
	1999 - 2005	Geochemistry	Company/Institution :Geological Survey of Norway
			The project has partly been financed by Norwegian Hydro (now Yara).
	2000 - 2004	Detail mapping	Company/Institution :NGU/Henrik Schiellerup
			Hand specimen sampling

Mineralization

	Era:	Proterozoic	Period:	Mesoproterozoic
	Dating:	931 (-3\+3) million year	Method:	U/Pb
	Genesis:	Orthomagmatic formation	Form:	Layer
	Main texture:	Banded	Min. distribution:	Disseminated (<20 % ore minerals)

Main grain size:

Medium grained (1-3 mm)

Main alteration:

	Strike/Dip:	4 / 50	Direction:
			Plunge:

Ti-deposit type(s)

	Main type:	Magmatic	Ilm/Mt-ratio:
	Sub type:	Ilm +/- Mt +/- Ap in mafic intrusion	%TiO(Ore):
	Titanium province:	Rogaland anorthosite province	%P2O5(Ore):
	Host rock:	Norite	%MgO(Ilm):	1 - 3
	Main Ti mineral:	Ilmenite	%V2O3(Mt):	> 0.8
			ppm U (Rutile):

Stratigraphic classification of host rock

Era:

Proterozoic

Period:

Mesoproterozoic

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

Group:

Bjerkreim-Sokndal Intrusion

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Plagioclase	Major mineral (>10%)
	Gangue mineral	Pyroxene	Major mineral (>10%)
	Gangue mineral	Biotite	Accessory mineral (<1%)
	Ore mineral	Ilmenite	Major mineral (>10%)
	Ore mineral	Magnetite	Major mineral (>10%)
	Ore mineral	Apatite	Subordinate mineral (1-10%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Gabbronorite	Intrusive
			Metamorphic facies :Unmetamorphosed

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Primary layering	Strike/Dip :4 / 50	Syn-mineralisation ;...Effect :Controls

Information(s) in free text format

Abstract

Oxide- and apatite-rich modally layered rocks in the lower part of the Bjerkreim-Sokndal Layered Intrusion in the Rogaland Anorthosite Province. The area is conventionally denoted MCUIB-e and defines a sequence of apatite-, ilmenite- and magnetite-bearing gabbronorite which may be followed from the farm at Åsen to Bjerkreim. The area is densely covered and the sequence only rarely exposed. The poor exposure makes it difficult to confidently assess the persistency and aerial extent of the MCU1Be target area. However, the overall similarities observed in profiles across the zone in terms of layering and mafic index do suggest that a prominent apatite-, ilmenite- and magnetite-rich zone exists. The zone varies in thickness from 15-20 to 60 m and is likely to be laterally continuous for at least 3 km wedging out gradually to the north and south.

Description

Megacyclic Unit (MCU) 1B distinguishes itself from the MCU's 3 and 4 in an important way: It does not contain any magnetite-bearing b- or d-zones, which means that the first appearance of apatite and magnetite is simultaneously at the base of zone MCU1Be. The MCU1Be is a relatively narrow zone of apatite, magnetite and ilmenite-rich cumulates extending south and southwest from the hinge zone of the intrusion near the village of Bjerkreim. The zone is 40-90 m wide and may be followed along strike for approximately 4 km. The stratigraphy has been offset by a number of minor faults. At the locality Bjerkreim SW, north of Berse lake, the zone is densely overgrown. It is therefore difficult to obtain a continuous impression of the extent and potential of the zone. The profile contains prominent sequences dominated by melanocratic apatite-, ilmenite- and magnetite-rich gabbronorite in intensely layered cumulates. 5 samples are taken in a profile and 1 sample at an isolated exposures south of Bjerkreim. The sequence here is not as extensive as at Åsen (< 50 m) and both the zone and the layered sequence tend to wedge out on approaching Bjerkreim. In the northernmost exposures, closer to Bjerkreim, the melanocratic series is only about 10 m thick and somewhat more leucocratic. The zone of economic interest is defined by 4 samples representing a 50 meter stratigraphis sequence of cumulates. Norm calculations from XRF whole rock analyses gives a total of 14.5% ilmenite, 10% magnetite and 7% apatite. The mineral composition of ilmenite and magnetite has been analysed by electron microprobe giving in average 1.5% MgO in ilmenite and 0.90% V2O3 in magnetite.

Free text

The deposit located at Bjerkreim SW corresponds to profile 2 and location 2 in the samplelist. It is part of the same zone (MCU1B-e) as the deposit descibed as Åsen (profile 1/ location 1). At the locality Bjerkreim SW, north of Berse lake, the zone is densely overgrown. It is therefore difficult to obtain a continuous impression of the extent and potential of the zone. The profile contains prominent sequences dominated by melanocratic apatite-, ilmenite- and magnetite-rich gabbronorite in intensely layered cumulates. 5 samples are taken in a profile and 1 sample at an isolated exposures south of Bjerkreim. The sequence here is not as extensive as at Åsen (< 50 m) and both the zone and the layered sequence tend to wedge out on approaching Bjerkreim. In the northernmost exposures, closer to Bjerkreim, the melanocratic series is only about 10 m thick and somewhat more leucocratic. The zone of economic interest is defined by 4 samples representing a 50 meter stratigraphis sequence of cumulates. Norm calculations from XRF whole rock analyses gives a total of 14.5% ilmenite, 10% magnetite and 7% apatite. The mineral composition of ilmenite and magnetite has been analysed by electron microprobe giving in average 1.5% MgO in ilmenite and 0.90% V2O3 in magnetite.

References

Schärer, U., E. Wilmart, et al. (1996). ¿The short duration and anorogenic character of anorthosite magmatism: U-Pb dating of the Rogaland complex, Norway.¿ Earth Planet. Sci. Lett. 139: 335-350. Egersund-Ogna: 929±2 Ma Helleren: 932±3 Ma Åna-Sira: 932±3 Ma Tellnes jotunite dyke: 931±5 Ma Tellnes ilmenite norite: 920±3 Ma Deformation of foliated margin in Egersund-Ogna: 915 Ma

Photo(s) from the Deposit area:

Photo no. 1 showing Location of Bjerkreim SW"

Bibliography:

From NGU's Reference Archive:

Korneliussen, Are; McEnroe, Suzanne A.; Nilsson, Lars-Petter; Schiellerup, Henrik; Gautneb, Håvard; Meyer, Gurli B.; Størseth, Leif Roger , 2000

	An overview of titanium deposits in Norway

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.436;27-38 pages

Abstract:

Titanium deposits in Norway are of three major types: igneous, metasomatic and metamorphic. The igneous deposits are compared of ilmenite, magnetite and apatite in various proportions and occur in geological provinces of different ages. and some have a metamorphic overprint. The other majord Ti ore-types is the rutile-bearing eclogites in western Norway that formed during the Caledonian high-pressure metamorphism of predominantly Proterozoic basic igneous rocks. The third Ti ore-Type is the Proterozoic rutile-bearing, scapolitised and albitised rocks in the Bamble region of South Norway.

Meyer, G.B.; Schiellerup, H.; Tegner, C. , 2002

	Chemical characterisation of ilmenite, magnetite and apatite in the Bjerkreim-Sokndal Layered Intrusion, Rogaland, South Norway

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.2002.042;25 pages

Abstract:

During 2001 cooperation was established between NGU and Norsk Hydro Agri in order to locate combined resources of apatite, ilmenite and vanadium magnetite in the Bjerkreim-Sokndal layered Intrusion in the Rogaland Anorthosite Province of aouth Norway. It had previously been recognized that a potential existed for finding coexisting apatite, low-Mg= ilmenite and vanadium-rich magnetite in the northern part (the Bjerkreim-lobe) of the layered intrusion. It had also become apparent that none of the minerals are present in amounts that can support exploitation of one mineral alone. Fieldwork was undertaken during July 2001 with the purpose of locating and constraining the most promising areas in terms of volume and grade of the three target minerals in the Bjerkreim-lobe. Three apatite-bearing and oxide-rich zones were singled out, sampled and preliminarily constrained. These zones are located with one area in mega-cyclic unit (MCU) IBe (Åsen-Bjerkreim), containing up to 41% of the three minerals, two areas in MCU IIIe (Helland and Terland respectively), with up to 34% of the three minerals, and in MCU IVe (Teksevatnet-Vasshus), with 32% ilmenite, magnetite and apatite. The fieldwork and subsequent whole-rock chemical analyses (XRF) were described and discussed by Schiellerup et al. (2001). In the apatite. and oxide-rich part of MCU IBe the MgO-content of ilmenite vary between 1.36 and 2.26% with an average of 1.8%. Stratigraphically dependant variation has not been resolved and the highest MgO contents in ilmenite tend to occur in the most mafic layers. In the two MCU III prospects at Helleland and Terland the MgO-content in ilmenite averages 2.2 and 2.5% respectively, whereas the Teksevatnet profile yield an average of 1.4% MgO in ilmenite. In the Teksevatnet profile the modal contrast between mafic and felsic layers is exceptional and the MgO-content of ilmenite is consi

Schiellerup, H.; Meyer, G.B.; Tegner, C.; Robins, B.; Korneliussen, A. , 2001

	Resources of apatite, ilmenite and magnetite in the Bjerkreim Sokndal Layered Intrusion, Rogaland, South Norway

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.2001.092;33 pages

Abstract:

The Rogaland Anorthosite Province in southwest Norway is well known for its many ilmenite deposits, of which Tellnes is at present the only one in product- ion In addition to ilmenite, the province carries a significant potential for apatite and vanadium-rich magnetite occurring in the layered series of the Bjerkreim-Sokndal Layered Intrusion. The current study was undertaken in order to locate exploitable resources of combined apatite, ilmenite and vanadian magnetite in the Bjerkreim-lobe of the Bjerkreim-Sokndal intrusion.

Korneliussen, A.; Furuhaug, L.; Gautneb, H.; McEnroe, S.; Nilsson, L.P.; Sørdal, T. , 2001

	Forekomster med ilmenitt, vanadiumholdig magnetitt og apatitt i norittiske bergarter i Egersundfeltet, Rogaland

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.2001.014;29 pages

Abstract:

Ved tidligere undersøkelser er det påvist at norittiske bergarter i omrpåden Sokndal og Bjerkreim inneholder betydelige mengder av apatitt, ilmenitt og vanadiumholdig magnetitt, men at forekomstene er lavgehaltige. En rekke norittrelaterte forekomster inneholder i størrelsesorden 10% apatitt, 10% ilmenitt og 10% magnetitt. De minerallogiske kvaliteter synes å være gode. For eksempel forekommer ilmenitt med relativt lavt MgO-innhold (i størrelsesorden 1%) og magnetitt med høyt V-innhold (0.7-1.2% V2O2) sammen med C1-fattig apatitt i visse deler av området, noe som er positivt med tanke på mulighetene for framtidig gruvedrift. Samtidig er de samlede ressurser av kombinert apatitt ilmenitt og vanadiumrik magnetitt store. Og det burde være rimelig gode muligheter til å påvise nye forekomster med minst like gode kvaliteter som de som er påvist fram til nå.

Name of Sample point: NH-72

(Object Id: 16040 9,02,01)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Bjerkreim (1212-2)

Map 1:250000:

Stavanger

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron-Titanium
			Element(s):	Fe Ti P V

Information(s) in free text format

Description

MCU 1B-e. Magnetite-apatite gabbronorite. Less melanocratic than NH-71. 20 cm below NH-71. Relative stratigraphis height in profile 2: 0 m

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NH-72	Bedrock	Sampler: Meyer , Schiellerup, Tegner Comment: Apatite, ilmenite , magnetite ,gabbro-norite No. of registrated element analyses = 1 No. of registrated oxide analyses = 1

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

Name of Sample point: NH-71

(Object Id: 16041 9,02,02)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Bjerkreim (1212-2)

Map 1:250000:

Stavanger

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron-Titanium
			Element(s):	Fe Ti P V

Information(s) in free text format

Description

MCU 1B-e. Magnetite-apatite gabbronorite from dark layer in 15-20 m thick layered sequence. In forest to the N of small farm some tens of metres above new road cut. Relative stratigraphic height in profile 2: 0 m

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NH-71	Bedrock	Sampler: Meyer , Schiellerup, Tegner Comment: Apatite, ilmenite , magnetite ,gabbro-norite No. of registrated element analyses = 1 No. of registrated oxide analyses = 1

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

Name of Sample point: NH-70

(Object Id: 16042 9,02,03)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Bjerkreim (1212-2)

Map 1:250000:

Stavanger

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron-Titanium
			Element(s):	Fe Ti P V

Information(s) in free text format

Description

Melanocratic magnetite-apatite norite with abundant visible apatite. Sample locality few dm¿s from NH-69. Relative stratigraphic height in profile 2: 42 m

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NH-70	Bedrock	Sampler: Meyer , Schiellerup, Tegner Comment: Apatite, ilmenite , magnetite ,gabbro-norite No. of registrated element analyses = 1 No. of registrated oxide analyses = 1

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

Name of Sample point: NH-69

(Object Id: 16043 9,02,04)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Bjerkreim (1212-2)

Map 1:250000:

Stavanger

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron-Titanium
			Element(s):	Fe Ti P V

Information(s) in free text format

Description

Relatively leucocratic layer c. 10 m stratigraphically below NH-68. Sample not particular leucocratic though. Relative stratigraphic height in profile 2: 42 m

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NH-69	Bedrock	Sampler: Meyer , Schiellerup, Tegner Comment: Apatite, ilmenite , magnetite ,gabbro-norite No. of registrated element analyses = 1 No. of registrated oxide analyses = 1

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

Name of Sample point: NH-68

(Object Id: 16044 9,02,05)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Bjerkreim (1212-2)

Map 1:250000:

Stavanger

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron-Titanium
			Element(s):	Fe Ti P V

Information(s) in free text format

Description

Top of melanocratic sequence below base MCU II. The top c. 10+ m of MCU IA do not display pronounced modal layering, but are overall fairly melanocratic. The layered melanocratic sequence below this zone has a thickness on the order of 20m. NH-68 from top of layered melanocratic sequence phaimC. Relative stratigraphic height in profile 2: 51 m

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NH-68	Bedrock	Sampler: Meyer , Schiellerup, Tegner Comment: Apatite, ilmenite , magnetite ,gabbro-norite No. of registrated element analyses = 1 No. of registrated oxide analyses = 1

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

Name of Sample point: NH-74

(Object Id: 16045 9,02,06)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Bjerkreim (1212-2)

Map 1:250000:

Stavanger

County:

UTM-Zone 33 - EUREF89/WGS84

Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron-Titanium
			Element(s):	Fe Ti P V

Information(s) in free text format

Description

MCU 1B-e. Not in actual sequence with NH-68-72, but somewhat further to the northeast along strike. Magnetite-apatite gabbronorite from diffuse melanocratic layer in the middle portion of section (almost average rock). Layering in this sequence strikes N020 and dips 40° to the E. This section is more than 10 m thick and sampled at farm road. It is dominated by normal magnetite gabbronorite with apatite. Intermittent dark layers 5-15 cm thick. Many melanocratic magnetite-apatite gabbronorite loose blocks in the area.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	NH-74	Bedrock	Sampler: Meyer , Schiellerup, Tegner Comment: Apatite, ilmenite , magnetite ,gabbro-norite No. of registrated element analyses = 1 No. of registrated oxide analyses = 1

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

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The fact sheet was created on 28.04.2024

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