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|
Norsk versjon | ||||
| THE NATURAL STONE DATABASE | |||||
| Deposit Area 1133 - 603 | |||||
| (Last updated 19.jan.2024) | |||||
Name of Deposit Area : Sandanger |
| (Object Id : 1133,603,00,00) |
| Location |
| County : | Rogaland (11) | Municipality : | Hjelmeland (1133) |
| Map 1:50000: | Strand (1213-2) | Map 1:250000: | Sauda |
| Marking point: | Longitude: | 6.0481130 | Latitude: | 59.2084300 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 331468 m. | Y-coord: | 6566991 m. |
|
|
| Commodity |
| Main Type: | Slate and schist | Sub Type: | Quartzitic flagstone | |
| Brickstone(Y/N): | Y |
| Production |
| Activity: | Stone quarrying | Reserves: | ||
| Prod. method: | Open pit mining | Production: | ||
| Prod. status: | Disused, closed | Volume of dump: |
| Importance |
| Public: | Not Assessed (reg. 21.03.2017) |
| Economical: | Could be significant , (Confirmed 10.nov.2006 by Leif Furuhaug) |
Products |
| Commercial Name | Product description |
| Kvartsittskifer | Classification :Cleaved slabs | Colour :Grayish | |
| Play of colours : | Uniformity :Medium good | ||
| Lithology : | Grain size : |
Mineralogy: |
| Feldspar | Major mineral (>10%) | ||
| Quartz | Major mineral (>10%) | ||
| Mica | Major mineral (>10%) | ||
| Epidote | Subordinate mineral (1-10%) | ||
| Titanite | Accessory mineral (<1%) | ||
| Opaque | Accessory mineral (<1%) | ||
| Carbonate | Accessory mineral (<1%) | ||
| Apatite | Accessory mineral (<1%) |
|
Operations |
| From - To | Activity | Comments | |
| 1900 - 1969 | Regular production | Company/Institution :Jan Espeland (siste driver) |
Deposit rock |
| Lithology: | Quartzrich flagstone | Weathering colour: | Gray | |
| Era: | Period: | |||
| Dating: | Method: | |||
| Genesis: | Form: | Layer | ||
| Main texture: | Schistose |
| Main grain size: | Fine - medium grained (<1mm - 3 mm) | Main alteration: | Sericitisation |
| Strike/Dip: | 243 / 18 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Period: |
| Province: | ||
| Geotec.unit: | ||
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Not defined | Schistosity | Strike/Dip :243 / 18 |
Information(s) in free text format |
| Description |
| I åssiden nord for Sandanger på Randøy ligger 2 skiferbrudd i tilnærmet samme nivå. Det østlige som her beskrevet var størst. Periodevis drift fra begynnelsen av 1900 frem til 1969. Produktet var klipte takstein og firkantede plattinger. Det var anlagt taubane ned til vei og senere ble det også anlagt vei til bruddet. På det meste var det 13 - 14 mann i arbeid. Mektigheten er ca. 12 m. Skiferen er noe tungtspaltende og oppsprukket. Den kan også egne seg godt som murestein. Sonen som dette og flere andre skiferbrudd på Randøy har drevet på kan være av økonomisk interesse. En må da foreta en helhetsvurdering og detaljkartlegging av hele sonen. |
Bibliography: |
| From NGU's Reference Archive: |
| Müller, Georg; Wurm, Friedrich , 1969 |
| Die Gesteine der Inselngruppe Randøy-Fogn Beiträge zur Metamorphose und zum Aufbau der kambro-silurischen Gesteine des Stavanger-Gebietes I |
| ;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.49 (2);97-144 pages |
| Abstract: | |
| Frie emneord: Jektonikk The metamorphism of the Stavanger district has become wellknown through the work of V.M. Goldschmidt (1921). The main point of Goldschmidt`s `Injektions-Kontactmetamorphism` is the progressive metamorphism of argillacious sediments and their transition into albite schists and plagioclase gneisses by metasomatic solutions given off from intruded trondhjemitic magmas. However, in contrast to the statements of Goldschmidt, the `Injectionsgneise` and trondhjemitic intrusions were found to be weakly metamorphosed arkoses, greywackes, quartzites, and argillicious sandstones. Rock fragments and clastic grains of quartz, microcline, oligoclase, hornblende, sphene, etc. are well preserved in a thoroughly recrystalized matrix. These observations are in accordance with the results of zircon investigations published by Kalsbeek (1964). The isolated sills of the Stavanger area are not of trondhjemitic origin because microcline perthite was found to be a very common constituent (up to 25 per cent) in the igneous rocks of Caledonian age. With the exceptions of these sills the whole Cambro-Ordovician series have been formed into a homogenous matter by Caledonian tectonics. Two systems of fold axes and related linear elements of different age have beeb checked. The younger phase of deformation shows unequal intensities over the whole district. |
Name of Locality : Sandanger |
| (Object Id : 1133,603,01,00) |
| Location |
| County : | Rogaland (11) | Municipality : | Hjelmeland (1133) |
| Map 1:50000: | Strand (1213-2) | Map 1:250000: | Sauda |
| Marking point: | Longitude: | 6.0525620 | Latitude: | 59.2076320 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 331718 m. | Y-coord: | 6566891 m. |
|
|
| Commodity |
| Main Type: | Slate and schist | Sub Type: | Quartzitic flagstone | |
| Brickstone(Y/N): |
| Production |
| Activity: | Stone quarrying | Reserves: | ||
| Prod. method: | Open pit mining | Production: | ||
| Prod. status: | Disused, closed | Volume of dump: |
Products |
| Commercial Name | Product description |
| Kvartsittskifer | Classification :Cleaved slabs | Colour :Grayish | |
| Play of colours : | Uniformity : | ||
| Lithology : | Grain size : |
Mineralogy: |
| Feldspar | Major mineral (>10%) | ||
| Quartz | Major mineral (>10%) | ||
| Muscovite | Subordinate mineral (1-10%) | ||
| Epidote | Subordinate mineral (1-10%) | ||
| Opaque | Accessory mineral (<1%) | ||
| Carbonate | Accessory mineral (<1%) |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Not defined | Schistosity | Strike/Dip :243 / 4 |
Information(s) in free text format |
| Abstract |
| Synlig sonemektighet er her bare 2-7 m, foldet og oppsprukket. Overfjellsmassene er betydelig. Det konkluderes i rapport1560/11C med at drift akkurat her ikke vil være lønnsomt. |
| The fact sheet was created on 02.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |