Norsk versjon
THE INDUSTRIAL MINERAL DATABASE
Occurence 1813 - 307 Sausvatnet
(Object Id: 14848)
(Last updated: 20.02.2006)

Location
County: Nordland Municipality: Brønnøy (1813)
Map 1:50000: Velfjord (1825-4) Map 1:250000:
Coordinate system: EU89-UTM Zone 33
East: 390199 m. North: 7245399 m.
Longitude: 12.6435470 Latitude: 65.3130850
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Resource
Resource Type: Talc Resource Subtype: Serpentine

Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

Resources and production
Activity: Exploration Reserves:
Operating method: Historical production:


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
Description
Ligger inne i et skyvedekke med bergarter fra tidlig til middel Ordovicium i alder. Det kan være en del av samme sonen som opptrer på Nevernes ved Heggefjorden. Bergarten er i hovedsak en serpentinitt.
Location
Ligger tett inntil Rv 803 mellom E6 og Brønnøysund. Avstand til Hommelstø er drøye 10 km.

Bibliography:
From NGU's Reference Archive:
Thorsnes, Terje; Løseth, Helge , 1991
Tectonostratigraphy in the Velfjord-Tosen region, southwestern part of the Helgeland Nappe Complex, Central Norwegian Caledonides.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.421;1-18 pages
Abstract:
In the southwestern parts of the Helgeland Nappe Complex, dismembered ophiolites and their cover sequences are imbricated together with nappes consisting dominantly of continentally derived rock units. A local nappe sequence comprises three nappes, informally termed the Lower, Middle and Upper nappes. The Lower and Upper nappes consist of partly migmatic mica gneisses and othogneisses associated with marbles and calc-silicate gneisses. Between these nappes, the Middle nappe includes an igneous complex of mafic and ultramafic rocks of ophiolitic affinity, unconformably overlain by a cover sequence with material derived partly from the ophiolite substrate. Plutonic rocks, ranging from hornblende gabbros to diorites and granites, were emplaced at several stages during the tectonometamorphic evolution of the region. Based on comparison with nearby areas, most of the regional metamorphism and deformation would seem to have occured in the Ordovician, with a later phase of thrusting during the Mid Silurian to Early Devonian Scandian orogeny.


The fact sheet was created on 28.03.2024

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