Norsk versjon | |||||
THE ORE DATABASE | |||||
Deposit Area 901 - 001 | |||||
(Last updated 25.feb.2005) |
Name of Deposit Area : Dalsvatnet |
(Object Id : 0901,001,00,00) |
Location |
County : | Aust-Agder (09) | Municipality : | Risør (0901) |
Map 1:50000: | Gjerstad (1612-1) | Map 1:250000: | Arendal |
Marking point: | Longitude: | 9.1317780 | Latitude: | 58.7763820 |
EU89-UTM Zone 32 | (Coordinates IS confirmed) |
X-coord: | 507619 m. | Y-coord: | 6515159 m. |
|
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: | Volume of dump: | 5 m3 |
Importance |
Public: | Little Importance (reg. 18.02.2015) |
Economical: | Minor interest , (Confirmed 23.feb.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: | Lens | |
Main texture: | Structureless | Min. distribution: | Massive (>50 % ore minerals) |
Main grain size: | Coarse grained (> 3 mm) | Main alteration: | Skarn formation |
Strike/Dip: | 310 / 70 | Direction: | ||
Plunge: |
Stratigraphic classification of host rock |
Era: | Proterozoic | Period: | Mesoproterozoic |
Province: | South Norwegian Basement Province | |
Geotec.unit: | Bamble Complex | |
Tectonic complex: | ||
Igneous complex: |
Group: | Formation: |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Plagioclase | Major mineral (>10%) | |
Gangue mineral | Hornblende | Major mineral (>10%) | |
Gangue mineral | Quartz | Subordinate mineral (1-10%) | |
Gangue mineral | Apatite | Subordinate mineral (1-10%) | |
Gangue mineral | Garnet | Subordinate mineral (1-10%) | |
Ore mineral | Pyrrhotite | Major mineral (>10%) | |
Ore mineral | Chalcopyrite | Accessory mineral (<1%) |
Lithology: |
Relationship | Rock | Origin | |
Host rock | Gabbro | Intrusive Original rock :Gabbro |
|
Metamorphic facies :Amphibolite |
Structures |
Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
Host rock | Foliation | Strike/Dip :310 / 70 | Post-mineralisation ;...Effect :Modifies |
Information(s) in free text format |
Free text |
The pit is situated in Glupedalen valley, west of Dalsvatnet lake and is best approached via the tractor track from Dale at the northern end of the lake. It is located on a forested hill, 30-40m over and slightly SE a few old houses. The pit consists of an essentially EW oriented trench with a 5m3 large tailings heap, but completely overgrown. The trench is 0.5-1m wide and 0.5m deep. At its W end, a very rusted schistose rock type containing biotite occurs, whereas nearby outcrops predominantly consist of gabbro. No ore has been observed, but presumably follows the gabbro foliation at 310/70. The tailings are dominated by very coarse grained hornblende-feldspar " quartz " garnet with dispersed sulphide grains. Blocks of massive coarse grained pyrrhotite with traces of chalcopyrite along the quartz lenses have been sampled. |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
AA0103.01 | Dump |
|
NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
from |
Deposit Area 901 - 001 Dalsvatnet |
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# |
AA0103.01 | Dump | 888 | 7 | 9 | 833 | 1592 | .2 | 7.0 |
------------------ |
Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
AA0103.01 | 4.0 | 6.0 | 25 | 1.6 | 6 | 1.00 | 2 | 3 | 24.30 |
------------------ |
Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
AA0103.01 | 19 | 11 | 149 | 34.12 | 3.00 | 24.00 | 1 | 51.0 | 67.00 |
------------------ |
Sample No. | B* | ||||||||
AA0103.01 | 2 |
The fact sheet was created on 16.05.2024 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
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