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|
Norsk versjon | ||||
| THE NATURAL STONE DATABASE | |||||
| Deposit Area 919 - 601 | |||||
| (Last updated 11.jan.2024) | |||||
Name of Deposit Area : Mjåvatn I |
| (Object Id : 0919,601,00,00) |
| Location |
| County : | Aust-Agder (09) | Municipality : | Froland (0919) |
| Map 1:50000: | Arendal (1611-4) | Map 1:250000: | Arendal |
| Marking point: | Longitude: | 8.4782160 | Latitude: | 58.5358930 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 469620 m. | Y-coord: | 6488493 m. |
|
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| Commodity |
| Main Type: | Sandstone and conglomerate | Sub Type: | Quartzite | |
| Brickstone(Y/N): | Y |
| Production |
| Activity: | Stone quarrying | Reserves: | ||
| Prod. method: | Open pit mining | Production: | ||
| Prod. status: | Volume of dump: |
| Importance |
| Public: | Not Assessed (reg. 21.03.2017) |
| Economical: | Significant , (Confirmed 13.des.2004 by Tom Heldal) |
| Historical: | No , (Confirmed 20.nov.2009 by Leif Furuhaug) |
Products |
| Commercial Name | Product description |
| Mjåvatn | Classification :Cleaved slabs | Colour :Light gray | |
| Play of colours : | Uniformity :Medium good | ||
| Lithology :Sandstone | Grain size :Fine - medium grained (<1mm - 3 mm) |
Mineralogy: |
| Feldspar | Major mineral (>10%) | ||
| Quartz | Major mineral (>10%) | ||
| Mica | Subordinate mineral (1-10%) |
|
Operations |
| From - To | Activity | Comments | |
| 1994 | Regular production | Company/Institution :Mjåvatn Steinbrudd | |
| Adresse: Mjåvatn 4828 Mjåvatn. Tlf. 48111660 |
Deposit rock |
| Lithology: | Quartzrich flagstone | Weathering colour: | ||
| Era: | Proterozoic | Period: | ||
| Dating: | Method: | |||
| Genesis: | Sedimentary/metamorphic | Form: | Layer | |
| Main texture: | Foliated |
| Main grain size: | Main alteration: |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | ||
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Not defined | Schistosity | Strike/Dip :60 / 90 |
Information(s) in free text format |
| Description |
| Steinbrudd i omdannet sandstein som har vært i drift siden rundt 1994. Det produseres vesentlig murestein og 5 - 10 centimeter tykke heller og plattingsstein. Markedet er vesentlig lokalt og regionalt. Bergarten er en omdannet sandstein, beige til grå på farge, som splitter i tykke plater. I store deler av forekomsten opptrer tverrsprekker vinkelrett på kløven, noe som gir en høy andel av rettvinklet murestein. Forekomsten har tilstrekkelige reserver for lang tids drift i samme størrelsesorden som de siste ti årene. Hovedprodukter er murestein og heller. Ericsson-bygget, Grimstad. |
| Location |
| Forekomsten/steinbruddet ligger rett ovenfor Mjåvatn, ca. 800 meter fra krysset med RV42, langs veien mot Øynaheia/Herefoss. |
| Photo(s) from the Deposit area: |
|
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||
| 919601 | Hand specimen |
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| The fact sheet was created on 16.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |