Norsk versjon | |||||
THE ORE DATABASE | |||||
Occurence 1826 - 034 Sommarfjelltoppen | |||||
(Object Id: 2950) (Last updated: 01.03.2000) |
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Location |
County: | Nordland | Municipality: | Aarborte (1826) |
Map 1:50000: | Susendalen (1925-1) | Map 1:250000: | Mosjøen |
Coordinate system: | EU89-UTM Zone 33 |
East: | 456402 m. | North: | 7261098 m. |
Longitude: | 14.0588940 | Latitude: | 65.4694230 |
Show on map |
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Resource |
Resource Type: | Precious metals (Au,Ag,PGE) | Resource Subtype: | Silver | |
Element(s): | Ag Pb Zn Cu Sb |
Importance |
Raw material meaning: | Not Assessed (reg. 18.02.2015) |
Resources and production |
Activity: | Pitting | Reserves: | ||
Operating method: | Historical production: |
Operations |
From - To | Activity | Comments | |
1880 - 1881 | Sampling | Company/Institution :Sommarfjelltoppen Grubebolag |
Mineralization |
Era: | Paleozoic | Period: | Ordovician | |
Genesis: | Unknown | Form: | Irregular | |
Main texture: | Fracture filling | Min. distribution: | Disseminated (<20 % ore minerals) |
Main grain size: | Medium grained (1-3 mm) | Main alteration: | Carbonatisation |
Strike/Dip: | 277 / 90 | Direction: | ||
Plunge: |
Stratigraphic classification of host rock |
Era: | Paleozoic | Period: | Ordovician |
Province: | Caledonides | |
Geotec.unit: | Køli Nappe Complex | |
Tectonic complex: | Hattfjelldaldekket | |
Igneous complex: |
Group: | Limingen | Formation: | Finnburvika |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Carbonate | Major mineral (>10%) | |
Gangue mineral | Quartz | Subordinate mineral (1-10%) | |
Ore mineral | Galena | Major mineral (>10%) | |
Ore mineral | Sphalerite | Major mineral (>10%) | |
Ore mineral | Malachite | Subordinate mineral (1-10%) | |
Ore mineral | Fahlore | Subordinate mineral (1-10%) | |
Ore mineral | Chalcopyrite | Subordinate mineral (1-10%) | |
Ore mineral | Azurite | Subordinate mineral (1-10%) |
Lithology: |
Relationship | Rock | Origin | |
Host rock | Dolomittbreksje | Sedimentary Original rock :Sedimentary breccia |
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Metamorphic facies :Greenschist | |||
Wall rock | Klorittskifer | Sedimentary Original rock :Tuffite |
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Metamorphic facies :Greenschist | |||
Wall rock | Dolomitt | Sedimentary Original rock :Dolomite |
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Metamorphic facies :Greenschist |
Structures |
Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
Host rock | Shear plane | Strike/Dip :60 / 80 | Syn-mineralisation ;...Effect :Controls | |
Host rock | Primary layering | Strike/Dip :186 / 30 | Pre-mineralisation ;...Effect :None | |
Host rock | Fault plane | Strike/Dip :277 / 90 | Syn-mineralisation ;...Effect :Controls |
Information(s) in free text format |
Free text |
Skjerpet ble drevet på 1880-tallet av Sommarfjelltoppen Grubebolag i forbindelse med leting etter sølv-malmer i Susendalen. En liten synk på 2,5x2 m2 og med dybde på 3 m utgjør hovedskjerpet, mens en grunn skjæring på 1,5x15 m2 i N-S-retning utgjør Nedre skjerp som ligger 40 m vest for hovedskjerpet. Begge skjerpene ligger over tregrensen øverst i lia mot toppen. Mellom skjerpene finnes det et par grunne røsker. Mineraliseringene opptrer i en karbonatbreksje bestående av dolomittfragmenter i en karbonat matriks. Dolomittbreksjen, som finnes langs hele fjellsiden, opptrer i veksellagring med massiv dolomitt og tynne klorittskifer-bånd og horisonter. Mineraliseringen opptrer i tilknytning til en Ø-V-strykende og steiltstående forkastning og assosierte skjærsoner. Den omfatter blyglans og noe sinkblende og kobberkis som danner sprekkefyllinger og dels sulfidsement i omgivende dolomittbreksjer som lokalt er ankerittomvandlet, dvs. brunforvitret karbonat. Karbonatbergartene er i hele fjellsiden gjennomsatt av et spredt nett med kvartsårer som i nedre skjerp omgis av litt silifisert dolomitt. Bare ett sted i skjerpene ble det funnet et par blyglansfylte sprekker i disse. |
Bibliography: |
From NGU's Reference Archive: |
Dallmann, Winfried K. , 1987 |
Sedimentary environment and synsedimentary tectonics in the Hattfjelldal Nappe, North-Central Norway. |
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.410;25-54 pages |
Abstract: | |
The Hattfjelldal Nappe, part of the "eugeoclinical" Seve-Köli Nappe Complex of the Scandinavian Caledonides, occurs beneath the basal thrust zone of the Helgeland Nappe Complex. Detailed fieldwork in these strongly deformed rocks has allowed recognition of a stratigraphic succession which partly can be correlated with successions adjacent nappes and other areas in the Central and North Scandinavian Caledonides. Two main groups can be recognized. The Røssvatnet Group is assumed to represent an Early Silurian carbonate tidal-flat and adjcent basinal environment, possibly situated upon a former accreted island arc/continental margin complex. Scandian tectonism is considered to have commenced subsequently, with the westward tilting of the depositional area which gave rise to a sedimentary unconfirmity (base of Limingen Group) and the development of psephitic massgravity sediments. The Limingen Group is considered to represent a transition from flysch to molasse facies, where sediments were derived from the advancing nappe front of the Helgeland Nappe Complex to the west. Sedimentation then ceased as the basin was overthrust in the Mid Silurian and truncated by the nappes, which gave rise to a post-sedimentary polyphase deformation sequence. |
Bathen, E. , 1881 |
Kort beretning om de vigtigste grubebolag i Vefsen og Hatfjelddalen. |
;Norges geologiske undersøkelse;RAPPORT;Bergarkivet; No.BA 1719;64 pages |
Abstract: | |
Dokumentet er en trykksak med opplysninger, tatt vesentlig fra Helgelands Tidende, om de viktigste grubeselskaper i Vefsn og Hattfjelldalen. |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||
39/9089695 | Dump |
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39/9089696 | Dump |
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39/90896976 | Dump |
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39/9089698 | Dump |
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39/9089699 | Dump |
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Name of Locality: Nedre skjerp |
(Object Id: 3785 34,01,00) |
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Location |
County: | Nordland | Municipality: | Aarborte (1826) |
Map 1:50000: | Susendalen (1925-1) | Map 1:250000: | Mosjøen |
Coordinate system: | EU89-UTM Zone 33 |
East: | 456362 m. | North: | 7261088 m. |
Longitude: | 14.0580340 | Latitude: | 65.4693280 |
Show on map |
|
Resource |
Resource Type: | Precious metals (Au,Ag,PGE) | Resource Subtype: | Silver | |
Element(s): | Ag Pb Zn Cu Sb |
Resources and production |
Activity: | Pitting | Reserves: | ||
Operating method: | Historical production: |
The fact sheet was created on 29.03.2024 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
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