(Last updated: 13.02.2024)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 3234 - 002 Grua | |||||
| (Object Id: 6246) (Last updated: 13.02.2024) |
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| Location |
| County: | Akershus | Municipality: | Lunner (3234) |
| Map 1:50000: | Gran (1815-1) | Map 1:250000: | Hamar |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 592216 m. | North: | 6681197 m. |
| Longitude: | 10.6663370 | Latitude: | 60.2569940 |
| Show on map |
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| Resource |
| Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron | |
| Element(s): | Fe |
| Importance |
| Raw material meaning: | Not Assessed (reg. 18.02.2015) |
| Historical: | Yes , (Confirmed 24.aug.2021 by Jan Sverre Sandstad) |
| Resources and production |
| Activity: | Mining | Reserves: | ||
| Operating method: | Underground mining | Historical production: |
Operations |
| From - To | Activity | Comments | |
| 1539 - 1799 | Regular production | Company/Institution :Hakadal Verk | |
| Driften skal ha pågått i alle fall fram til 1799, og det er også sannsynlig med perioder uten drift. |
Mineralization |
| Era: | Paleozoic | Period: | Permian | |
| Genesis: | Skarn formation | Form: | Lens | |
| Main texture: | Structureless | Min. distribution: | Massive (>50 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: | Skarn formation |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Paleozoic | Period: | Ordovician |
| Province: | Oslo Region | |
| Geotec.unit: | Akershus Graben | |
| Tectonic complex: | ||
| Igneous complex: | Nordmarka-Hurdal Batholith |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Pyroxene | Major mineral (>10%) | |
| Ore mineral | Magnetite | Major mineral (>10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Pyroxene skarn | Sedimentary Original rock :Limestone |
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| Metamorphic facies :Contact | |||
| Wall rock | Limestone | Sedimentary Original rock :Limestone |
Information(s) in free text format |
| Historic |
| Jern ble utvunnet fra Hadelandsgruben 1536-1559, som nå ligger innenfor Østhagan landskapsvernområde. |
Bibliography: |
| From NGU's Reference Archive: |
| Olerud, S.; Owen, A.W. , 1987 |
| Gran. Berggrunnskart; Gran; 18151; 1:50 000; sort/hvitt; |
| ;Norges geologiske undersøkelse;KART |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| JS-OS2124 | Dump |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 3234 - 002 Grua |
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# |
| JS-OS2124 | Dump | 39 | 253 | 5 | 19 | 20 | .1 | -.5 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sn* | Sb* | Bi* |
| JS-OS2124 | -2.5 | -.5 | 1 | .3 | 10 | 0.33 | 2 | 0 | 0 |
| ------------------ |
| Sample No. | Se* | Ga* | Ge* | In* | S% | V* | Cr* | Mn* | Fe% |
| JS-OS2124 | -1.00 | 4.35 | 0.19 | 0.45 | .20 | 20 | 163 | 2810 | 24.00 |
| ------------------ |
| Sample No. | Th* | W* | Rb* | Sr* | Y* | Zr* | Nb* | Ta* | Cs* |
| JS-OS2124 | 2.49 | 0 | 3.3 | 59.8 | 1.0 | 56 | 0.70 | 0.12 | 0.23 |
| ------------------ |
| Sample No. | La* | Ce* | Li* | Be* | Na* | Mg* | Al* | P* | K * |
| JS-OS2124 | 1.20 | 3.38 | 1 | 3 | 300 | 48500 | 4600 | 40 | 200 |
| ------------------ |
| Sample No. | Ca* | Sc* | Ti* | Te* | Hf* | Re* | Tl* | ||
| JS-OS2124 | ###### | 6.60 | 680 | -0.05 | 1.70 | -0 | 0 |
| The fact sheet was created on 24.10.2025 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2025 Geological Survey of Norway |