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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 1129 - 005 | |||||
| (Last updated 25.feb.2005) | |||||
Name of Deposit Area : Helleknuten |
| (Object Id : 1129,005,00,00) |
| Location |
| County : | Rogaland (11) | Municipality : | Forsand (1129) |
| Map 1:50000: | Høle (1212-1) | Map 1:250000: | Mandal |
| Marking point: | Longitude: | 6.1421610 | Latitude: | 58.8670760 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 335209 m. | Y-coord: | 6528769 m. |
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| Commodity |
| Main Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Sub Type: | Nickel | |
| Element(s): | Ni Cu Co |
| Production |
| Activity: | Pitting | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Not yet active | Volume of dump: | 50 m3 |
| Importance |
| Public: | Little Importance (reg. 18.02.2015) |
| Economical: | Minor interest , (Confirmed 09.mai.2001 by Jan Sverre Sandstad) |
Operations |
| From - To | Activity | Comments | |
| 2000 - 2000 | Sampling | Company/Institution :NGU |
Mineralization |
| Era: | Proterozoic | Period: | Mesoproterozoic | |
| Dating: | Method: | |||
| Genesis: | Orthomagmatic formation | Form: | Irregular | |
| Main texture: | Structureless | Min. distribution: | Massive (>50 % ore minerals) |
| Main grain size: | Medium grained (1-3 mm) | Main alteration: |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Mesoproterozoic |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | Agder Complex | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Feldspar | Major mineral (>10%) | |
| Gangue mineral | Amphibole | Major mineral (>10%) | |
| Gangue mineral | Biotite | Subordinate mineral (1-10%) | |
| Gangue mineral | Garnet | Accessory mineral (<1%) | |
| Ore mineral | Pyrrhotite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Subordinate mineral (1-10%) | |
| Ore mineral | Pentlandite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Gabbro | Intrusive Original rock :Gabbro |
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| Metamorphic facies :Amphibolite | |||
| Wall rock | Banded gneiss | Sedimentary Original rock :Wacke |
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| Metamorphic facies :Amphibolite |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Foliation | Strike/Dip :210 / 30 | Post-mineralisation ;...Effect :Modifies |
Information(s) in free text format |
| Free text |
| The mine pit is situated on a steep slope that starts from a rock plateau featuring a powerline. It consists of a 4H3m deep pit at the bottom of a 10-15m wide steep ledge. The main rock over the pit is dominated by medium to coarse grained granitic gneiss, with a few mafic bands. The host rock in the tailings is difficult to identify: it is partly intensely folded, partly brecciated and usually rusted, but presumably represents an altered and deformed gabbroic lense in the gneiss. It contains irregular, 5-10cm thick lenses of massive pyrrhotite with minor chalcopyrite (samples 01,04). In addition, sulphides occur in aggregates as well as disseminated in plagioclase-biotite " garnet rock (sample 02) and in fine grained gabbro (sample 03). |
| Photo(s) from the Deposit area: |
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Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| RO0140.01 | Dump |
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| RO0140.02 | Dump |
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| RO0140.03 | Dump |
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| RO0140.04 | Dump |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 1129 - 005 Helleknuten |
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# |
| RO0140.01 | Dump | 2959 | 20 | 11 | 578 | 1855 | .2 | 38.0 |
| RO0140.02 | Dump | 2017 | 27 | 9 | 212 | 852 | .5 | 63.0 |
| RO0140.03 | Dump | 1162 | 28 | 5 | 141 | 594 | .5 | 8.0 |
| RO0140.04 | Dump | 2306 | 14 | 5 | 505 | 1755 | .2 | 267.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| RO0140.01 | 5.0 | 20.0 | 1 | .6 | 32 | 37.00 | 2 | 3 | 13.25 |
| RO0140.02 | 8.0 | 10.0 | 1 | .6 | 63 | 7.00 | 2 | 2 | 4.89 |
| RO0140.03 | 6.0 | 6.0 | 1 | .4 | 39 | 3.00 | 2 | 2 | 3.20 |
| RO0140.04 | 1.0 | 20.0 | 5 | .5 | 38 | 13.00 | 2 | 4 | 12.85 |
| ------------------ |
| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| RO0140.01 | 33 | 157 | 67 | 25.64 | 2.00 | 16.00 | 1 | 7.0 | 2.00 |
| RO0140.02 | 71 | 201 | 127 | 11.17 | 2.00 | 8.00 | 1 | 19.0 | 2.00 |
| RO0140.03 | 22 | 85 | 76 | 8.17 | 1.00 | 4.00 | 1 | 38.0 | 3.00 |
| RO0140.04 | 28 | 130 | 71 | 24.82 | 1.00 | 14.00 | 1 | 5.0 | 2.00 |
| ------------------ |
| Sample No. | B* | ||||||||
| RO0140.01 | 6 | ||||||||
| RO0140.02 | 7 | ||||||||
| RO0140.03 | 6 | ||||||||
| RO0140.04 | 7 |
| The fact sheet was created on 29.04.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |