(Last updated: 10.06.2015)
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Norsk versjon | ||||
| THE ???? DATABASE | |||||
| Occurence 0 - 000 FEIL | |||||
| (Object Id: ) (Last updated: 10.06.2015) |
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| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Ørsdalsvatnet (1312-3) | Map 1:250000: | Stavanger |
| County: | UTM-Zone 33 - EUREF89/WGS84 |
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| Resource |
| Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron-Titanium | |
| Element(s): | Fe Ti P |
| Importance |
| Raw material meaning: | Little Importance (reg. 10.06.2015) |
| Resources and production |
| Activity: | Exploration | Reserves: | ||
| Operating method: | Historical production: |
Operations |
| From - To | Activity | Comments | |
| 1999 - 2005 | Geochemistry | Company/Institution :NGU | |
| XRF and mineral chemistry | |||
| 2000 - 2004 | Detail mapping | Company/Institution :NGU / Henrik Schiellerup | |
| Detailed mapping and hand specimen sampling. |
Mineralization |
| Era: | Proterozoic | Period: | Neoproterozoic | |
| Dating: | 931 (-3\+3) million year | Method: | U/Pb | |
| Genesis: | Orthomagmatic formation | Form: | Layer | |
| Main texture: | Banded | Min. distribution: | Semi-massive (20-50 % ore minerals) |
| Main grain size: | Medium grained (1-3 mm) | Main alteration: |
| Strike/Dip: | 110 / 80 | Direction: | ||
| Plunge: |
| Ti-deposit type(s) |
| Main type: | Magmatic | Ilm/Mt-ratio: | 1 - 5 | |
| Sub type: | Ilm +/- Mt +/- Ap in mafic intrusion | %TiO(Ore): | ||
| Titanium province: | Rogaland anorthosite province | %P2O5(Ore): | ||
| Host rock: | Norite | %MgO(Ilm): | <1 | |
| Main Ti mineral: | Ilmenite | %V2O3(Mt): | > 0.8 | |
| ppm U (Rutile): |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Neoproterozoic |
| 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 | Pyroxene | Major mineral (>10%) | |
| Gangue mineral | Plagioclase | Major mineral (>10%) | |
| Gangue mineral | Biotite | Accessory mineral (<1%) | |
| Ore mineral | Ilmenite | Major mineral (>10%) | |
| Ore mineral | Magnetite | Subordinate mineral (1-10%) | |
| Ore mineral | Apatite | Subordinate mineral (1-10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Gabbronorite | Intrusive Original rock :Gabbro norite |
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| 931 (-3\+3) mill. years;..Method:U/Pb | |||
| Metamorphic facies :Unmetamorphosed |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Primary layering | Strike/Dip :110 / 82 | Syn-mineralisation ;...Effect :Controls |
Information(s) in free text format |
| Abstract |
| Oxide- and apatite-rich modally layered gabbronorite in the Bjerkreim-Sokndal Layered Intrusion in the Rogaland Anorthosite Province. The stratigraphic sequence, to which the Teksestemmen deposit belong, is conventionally denoted MCU4-e and may be followed along strike from Rappstad in the southern extension around the hinge of the Bjerkreim lobe to Ualand in the north-eastern extension - a total distance of approximately 25 km. The two uppermost zones in MCU IV (the e- and f-zones) contain apatite in addition to ilmenite and magnetite. The stratigraphic thickness of the two zones exceeds 1 km in the central part, however the economic part is restricted to the lowermost part (50-170 m) of zone e. The zone of economic interest is further restricted to the northeastern part of the Bjerkreim lobe, the area between Terland and Ualand, a total distance of ~10 km. |
| Description |
| In the area of Teksevatnet the thickness of MCU4e zone has been reduced significantly compared to the Terland area (see Terland S in Eigersund county). At Teksestemmen the thickness is less than 1000 m. The amounts of apatite, ilmenite and magnetite have increased slightly, but still only a few samples has more than 30% normative ilmenite + magnetite + apatite. The profile from Teksestemmen is included in this database to give a more differentiated picture of the tri-mineral deposit in the Bjerkreim-Sokndal Intrusion. The profile at Teksestemmen was sampled along outcrops on the shore of lake Teksevatnet. The lake was 2 m lower than normal water level at the time of observation and sampling. In contrast to locations at Teksevatnet-South and other locations further east, only one isolated 3 m- thick zone of prominent layering has been encountered. In general the profile is characterized by relatively homogenous gabbronorites with modal layering on a scale from dm's to m's. A total of 5 samples represent a 50m thick sequence of minor economic interest (20-31% norm value minerals). Norm calculations from XRF whole rock analyses gives an average of 10.5 % ilmenite, 6.8 % magnetite and 9.3 % apatite. The mineral composition of ilmenite and magnetite has been analysed by electron microprobe giving in average 0.8 % MgO in ilmenite and 0.84 % V2O3 in magnetite. |
| Free text |
| The deposit located at Teksestemmen is part of the same zone (MCU4-e) as the deposit described as Terland S (also Eigersund county) and Teksevatnet-South, Teksevatnet-Lauvneset, Bilstadvatnet-W, Bilstadvatnet-Storaneset, Mjåsund, Ollestad and Ualand (all located in Lund county). Walking a log road from Øygrei and crossing the Teksevatnet dam at the lake Svinepollen one reach this locality. In the area of Teksevatnet the thickness of the geological unit hosting the Zone C target (MCUIVe) is reduced significantly compared to the Terland area. At Teksestemmen the thickness is less than 1000 m. The amounts of apatite, ilmenite and magnetite have increased slightly, but still only a few samples have more than 30% normative ilmenite + magnetite + apatite. The profile at Teksestemmen was sampled along wave-washed outcrops on the shore of lake Teksevatnet. The lake was 2 m lower than normal water level at the time of observation and sampling. In contrast to locations at Teksevatnet-South and other locations further east, only one isolated 3 m- thick zone of prominent layering has been encountered. In general the profile is characterized by relatively homogenous gabbronorites with modal layering on a scale from dm's to m's. A total of 5 samples represent a 50m thick sequence of minor economic interest (20-31% norm value minerals). Norm calculations from XRF whole rock analyses gives an average of 10.5 % ilmenite, 6.8 % magnetite and 9.3 % apatite. The mineral composition of ilmenite and magnetite has been analysed by electron microprobe giving in average 0.72 % MgO in ilmenite and 0.84 % V2O3 in magnetite. The two lowermost samples from this profile represents a sequence with increasing P2O5 reaching a maximum of 8-9 % apatite in the central part of the profile. The economic zone is defined by samples in the interval 90 to 150 m. In contrast to locations at Teksevatnet and other locations further east, no zones of prominent layering has been encountered. The profile is characterized by relatively homogenous gabbronorites with modal layering on a scale from dm's to m's. Orientation of layering: 86/70 South. |
| 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: |
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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 |
| Marker, Mogens; Schiellerup, Henrik; Meyer, Gurli; Robins, Brian; Bolle, Olivier , 2004 |
| Beskrivelse til geologisk kart over Rogaland Anortosittprovins, 1:75 000 |
| ;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.2004.007;23 pages |
| Abstract: | |
| Det geologiske kartet er en oppdater oversikt over geologien i anortosittprovinsen i Rogaland, og kan danne grunnlag for forståelsen av de eksisterende geolgoiske ressursene og fremtidig mineralleting i provinsen. Kartet setter mineralressursene i en geologisk sammenheng og bidrar til å forstå deres opprinnelse og utbredelse. Det geologiske kartet er utarbeidet som et digitalt kart, hvilket vil lette dets anvendelse som basiskart for diverse typer nåværende og fremtidige undersøkelser i anortosittprovinsen av både økonomisk og vitenskapelig karakter. Rogaland anortosittprovinsen er ca. 930 millioner år gammel og omfatter flere anortositt-massiver, den lagdelte Bjerkreim-Sokndal Intrusjonen og sene norittiske og jotunittiske til charnokittiske intrusjoner. Det eldste massivet er Egersund-Ogna Anortositten i vest, som err skilt fra den folieret Håland Annortositten med en sone av sterkt foliert båndet gneis. Den yngre, udeformerte Helleren Anortositten i den sentrale del av provinsen intruderer og skjærer både Egersund-Ogna og Håland Anortosittene. Helleren Anortositteni den sentrale del av provinsen intruderer og skjærer både Egersund-Ogna og Håland Anortosittene. helleren Anortositten er en vestlig fortsettelse av Åna-Sira Anortositten. De er bare øverst adskilt av et trau (lobe) av den yngre lagdelte Bjerkreim-Sokndal Intrusjonen. Denne ligger i en uregelmessig traustruktur over både anortositt-massivene og gneisene i den nordøstlige del av provinsen. Over Bjerkreim-Sokndal Intrusjone opptrer mangeritt og kvarts-mangeritt, som strekker seg sørøstover i den såkalte Apofyse-intrusjonen. Provinsen gjennomsettes av en rekke sene jotunittiske og mangerittiske bergarter i form av ganger og små kropper. De største er Eia-Rekefjord Intrusjonen i trauet mellom Helleren og Åna-Sira Anortosittene og Hadland Intrusjonen lengst i vest, som begge består av jotunittiske bergarter. En |
| 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. |
Name of Sample point: NH-158 |
| (Object Id: 16143 63,08,01) |
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| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Ørsdalsvatnet (1312-3) | Map 1:250000: | Stavanger |
| County: | UTM-Zone 33 - EUREF89/WGS84 |
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| Resource |
| Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron-Titanium | |
| Element(s): | Fe Ti P |
Information(s) in free text format |
| Description |
| MCU-4e. Layered (cm - dm- scale) sequence in apatite-ilmenite-magnetite bearing gabbronorite. Outcrops along lake shore (lake is 2m below normal water level). Sample of average gabbronorite. Modal layering: 110/82 S. Relative stratigraphic height in profile 7: 80 m (no samples below NH-158 in MCU IVe, but apatite is present at lower levels than this.) |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||||
| NH-158 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Name of Sample point: NH-156 |
| (Object Id: 16144 63,08,02) |
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| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Ørsdalsvatnet (1312-3) | Map 1:250000: | Stavanger |
| County: | UTM-Zone 33 - EUREF89/WGS84 |
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| Resource |
| Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron-Titanium | |
| Element(s): | Fe Ti P |
Information(s) in free text format |
| Description |
| MCU-4e. Layered (cm - dm- scale) sequence in apatite-ilmenite-magnetite bearing gabbronorite. 3 m thick sequence dominated by 30% melanocratic layers. Outcrop along lake shore (lake is 2m below normal water level) 50 m east-south-east of dam. Sample from 8cm thick melanocratic layer just below sample NH-157. Modal layering: 110/80 S. Relative stratigraphic height in profile 7: 106 m |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||||
| NH-156 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Name of Sample point: NH-157 |
| (Object Id: 16145 63,08,03) |
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| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Ørsdalsvatnet (1312-3) | Map 1:250000: | Stavanger |
| County: | UTM-Zone 33 - EUREF89/WGS84 |
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| Resource |
| Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron-Titanium | |
| Element(s): | Fe Ti P |
Information(s) in free text format |
| Description |
| MCU-4e. Layered (cm - dm- scale) sequence in apatite-ilmenite-magnetite bearing gabbronorite. 3 m thick sequence dominated by 30% melanocratic layers. Outcrop along lake shore (lake is 2m below normal water level) 50 m east-south-east of dam. Sample from 25cm thick leucocratic layer just above sample NH-156. Modal layering: 110/80 S. Relative stratigraphic height in profile 7: 106 m |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||||
| NH-157 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Name of Sample point: NH-159 |
| (Object Id: 16146 63,08,04) |
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| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Ørsdalsvatnet (1312-3) | Map 1:250000: | Stavanger |
| County: | UTM-Zone 33 - EUREF89/WGS84 |
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| Resource |
| Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron-Titanium | |
| Element(s): | Fe Ti P |
Information(s) in free text format |
| Description |
| MCU-4e. Layered (cm - dm- scale) sequence in apatite-ilmenite-magnetite bearing gabbronorite. Sample of average gabbronorite from sequence dominated by 30-50 cm thick leucocratic layers alternating with 1-3 cm thick melanocratic layers. Outcrop along lake shore (lake is 2m below normal water level) 70 m east-south-east of dam. Modal layering: 110/80 S. Relative stratigraphic height in profile 7: 127 m |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||||
| NH-159 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Name of Sample point: HN-160 |
| (Object Id: 16147 63,08,05) |
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| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Ørsdalsvatnet (1312-3) | Map 1:250000: | Stavanger |
| County: | UTM-Zone 33 - EUREF89/WGS84 |
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| Resource |
| Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron-Titanium | |
| Element(s): | Fe Ti P |
Information(s) in free text format |
| Description |
| MCU-4e. Apatite-ilmenite-magnetite bearing gabbronorite. Sample of leoconorite from sequence with little or no modal layering but prominent magmatic lamination. Slightly altered outcrop along lake shore (lake is 2m below normal water level) just to the south of point. Relative stratigraphic height in profile 7: 134 m |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||||
| HN-160 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
| The fact sheet was created on 04.05.2024 |
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