|
|
Norsk versjon | ||||
| THE INDUSTRIAL MINERAL DATABASE | |||||
| Deposit Area 911 - 314 | |||||
| (Last updated 13.jan.2023) | |||||
Name of Deposit Area : Mostad |
| (Object Id : 0911,314,00,00) |
| Location |
| County : | Aust-Agder (09) | Municipality : | Gjerstad (0911) |
| Map 1:50000: | Gjerstad (1612-1) | Map 1:250000: | Arendal |
| Marking point: | Longitude: | 9.0037860 | Latitude: | 58.8871980 |
| EU89-UTM Zone 32 | (Coordinates NOT confirmed) |
| X-coord: | 500218 m. | Y-coord: | 6527491 m. |
|
|
| Commodity |
| Main Type: | Feldspar | Sub Type: | Pegmatitic feldspar |
| Importance |
| Public: | Not Assessed (reg. 18.02.2015) |
| Economical: | Not classified/evaluated |
Mineralization |
| Era: | Period: | |||
| Dating: | Method: | |||
| 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 |
| Mineraler fra denne pegmatittkroppen er beskrevet hos Sverdrup et al (1979), Pegmatittkkroppen er beskrevet som 7 bred med strøk 153 N og fall 60 grader Ø og strekker seg fra myrlengdt terreng i sørøst til skogkledd terreng. |
Bibliography: |
| From NGU's Reference Archive: |
| Sverdrup, Thor L.; Bryn, Knut Ørn; Sæbø, Per Chr. , 1959 |
| Contributions to the mineralogy of Norway |
| ;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.39 (2/3);237-247 pages |
| Abstract: | |
| Frie emneord: Bastnäsite Optical and X-ray powder data are given for bastnäsite from four localities in Norway. The indices of refraction and the birefringences are lower than those reported earlier. The crystallographic constants are in close agreement with the previously published values, except in one case where the mineral shows smaller a0 and c0 values. The variation in the unit cell and the optical properties are discussed, but lack of chemical data prevents any conclusive explanation. Bastnäsite has been found as a secondary mineral, mostly as an alteration product of allanite. The mineral seems to be more widespread than supposed earlier especially in pegmatites containing altered allanite. |
| The fact sheet was created on 29.04.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |