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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 605 - 025 | |||||
| (Last updated 25.feb.2005) | |||||
Name of Deposit Area : Mastekrog |
| (Object Id : 0605,025,00,00) |
| The deposit area belongs to the Province : Holleia |
| Location |
| County : | Buskerud (06) | Municipality : | Ringerike (0605) |
| Map 1:50000: | Hønefoss (1815-3) | Map 1:250000: | Hamar |
| Marking point: | Longitude: | 10.0429820 | Latitude: | 60.0532530 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 558079 m. | Y-coord: | 6657799 m. |
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| Commodity |
| Main Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Sub Type: | Nickel | |
| Element(s): | Ni Cu |
| Production |
| Activity: | Pitting | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: | 10 m3 |
| Importance |
| Public: | Little Importance (reg. 18.02.2015) |
| Economical: | Minor interest , (Confirmed 16.feb.2005 by Havard Gautneb) |
Operations |
| From - To | Activity | Comments | |
| Pitting |
Mineralization |
| Era: | Proterozoic | Period: | Mesoproterozoic | |
| Dating: | Method: | |||
| Genesis: | Unknown | Form: | ||
| Main texture: | Min. distribution: | Disseminated (<20 % ore minerals) |
| Main grain size: | Main alteration: |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Mesoproterozoic |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | Kongsberg Complex | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Garnet | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrrhotite | Major mineral (>10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Banded gneiss | ||
| Metamorphic facies :Amphibolite |
Information(s) in free text format |
| Free text |
| The mine pit is situated right next to a tractor track about 100m W of a former sports field. The pit really is a small oblique trench following the foliation, about 3m deep with a 1H1.5m entry. There is a small 10m3 tailings heap on the lower side. Sulphides are hard to find, they occur finely dispersed fine grained pyrrhotite in a quartz rich schist with some garnet. It is said there used to be a larger pit just next to the nearest house, but that has been filled back and a new road has been put over it. That is probably the so-called Grefsrud pit described in the Norsk Hydro A/S report by Vokes & Vrålstad 1969. It is supposed to have been a 2m deep pit in pale green mica gneiss with very poor pyrite impregnation. Finally, there may have been a pit closer to the road, completely covered now. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| BU0379.01 | Dump |
|
| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 605 - 025 Mastekrog |
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# |
| BU0379.01 | Dump | 53 | 276 | 11 | 10 | 33 | .3 | 19.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| BU0379.01 | 4.0 | 3.0 | 1 | .1 | 55 | 1.00 | 2 | 2 | -.01 |
| ------------------ |
| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| BU0379.01 | 45 | 65 | 498 | 4.92 | 3.00 | 4.00 | 1 | 6.0 | 39.00 |
| ------------------ |
| Sample No. | B* | ||||||||
| BU0379.01 | 2 |
| The fact sheet was created on 18.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |