(Last updated: 22.08.2024)
|
|
Norsk versjon | ||||
| THE INDUSTRIAL MINERAL DATABASE | |||||
| Occurence 3120 - 373 Festningshøgda (Sandaker 2) | |||||
| (Object Id: 8909) (Last updated: 22.08.2024) |
|||||
|
|
| Location |
| County: | Østfold | Municipality: | Rakkestad (3120) |
| Map 1:50000: | Sarpsborg (1913-1) | Map 1:250000: | Oslo |
| Coordinate system: | EU89-UTM Zone 32 | (Coordinates NOT confirmed) |
| East: | 636418 m. | North: | 6594192 m. |
| Longitude: | 11.4072720 | Latitude: | 59.4640240 |
| Show on map |
|
|
| Resource |
| Resource Type: | Feldspar | Resource Subtype: | Pegmatitic feldspar |
| Importance |
| Raw material meaning: | Little Importance (reg. 18.02.2015) |
| Resources and production |
| Activity: | Test mining | Reserves: | ||
| Operating method: | Open pit mining | Historical production: |
Products |
| Element/product | Crude ore grade or quality | Reg. date | |
| Pegmatitic feldspar | % | 15.10.2024 |
Mineralization |
| Genesis: | Form: | |||
| Main texture: | Min. distribution: |
| Main grain size: |
| Strike/Dip: | Direction: | |||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Period: |
| Province: | ||
| Geotec.unit: | ||
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Information(s) in free text format |
| Free text |
| Et lite brudd uten vei opp i åsiden 750 meter sydøst for Sandaker. Det sees en rund grop 10-15 meter. Det var drift på k-feltspat i perioden 1986-97. Broch (1934) skriver "Her er nu så tilgrodd at nærmere iakttagelser ikke kan gjøres. Det synes som om gangens hovedretning er omtrent østsydøst. Sidestenen er grå, jevnkornig gneis som faller steilt mot sydvest. Der sees rester av tyrenner ned åssiden i vest. Ennu ligger det igjen litt alkalifeltspat i stykker på opptil 25 kg. Den er lysegul med litt muskovitt og ofte små rustflekker på spalteflatene. Der sees også en del vrakglimmer." |
| Location |
| Koordinatene plotter i en bekk og er neppe rette. En mulige lokasjoner som bør sjekkes ut er: EU89 UTM sone 32 636674 6594203 (kan være naturlig ur med rasvifte foran eller gammel bruddsted med tipphaug) |
Bibliography: |
| From NGU's Reference Archive: |
| Broch, Olaf Anton , 1934 |
| Feltspat IV. Forekomster i Akershus og Østfold øst for Glomma. |
| ;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.141;1-119 pages |
| Abstract: | |
| In this publication, which is a sequel to Feltspat II and III by Olaf Andersen and Tom F.W. Barth, brief and exoteric descriptions and some information on production and history are given of about 180 individual feldspar, quartz, and mica deposits, all of them situated east of the river Glomma in south-eastern Norway. Particulars of purely geological or mineralogical interest are few; most of them are given as footnotes or in the preface, but the minerals of each deposit, exceot quartz, feldspar and mica, are listed. The deposits are cross cutting pegmatite dikes, with a northeastern strike and a steep dip. The dikes exhibit a marked zoning; moreover, they are remarkably free from rare minerals, the occurrences of which seems to be restricted almost entirely to the dikes near the Idefjord (Bohus) granite. |
| The fact sheet was created on 09.07.2025 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2025 Geological Survey of Norway |