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THE ???? DATABASE | |||||
Occurence 0 - 000 FEIL | |||||
(Object Id: ) (Last updated: 25.01.2024) |
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Location |
County: | Municipality: | Mangler () |
Map 1:50000: | Bruvik (1215-4) | Map 1:250000: | Bergen |
Coordinate system: | UTM-Zone 33 - EUREF89/WGS84 |
East: | 313300 m. | North: | 6703300 m. |
Longitude: | 5.6087350 | Latitude: | 60.4213290 |
Show on map |
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Resource |
Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Nickel | |
Element(s): | Ni Cu |
Importance |
Raw material meaning: | Little Importance (reg. 18.02.2015) |
Mineralization |
Era: | Paleozoic | Period: | Ordovician | |
Genesis: | Form: | |||
Main texture: | Min. distribution: |
Main grain size: | Main alteration: |
Strike/Dip: | Direction: | |||
Plunge: |
Stratigraphic classification of host rock |
Era: | Paleozoic | Period: | Ordovician |
Province: | Caledonides | |
Geotec.unit: | Hardangerfjord Nappe Complex | |
Tectonic complex: | ||
Igneous complex: | Gulfjell Ophiolite Complex |
Group: | Formation: |
Information(s) in free text format |
Free text |
Den eventuelle Ni-mineraliseringen plotter i dag sentralt i et større kalksteinsbrudd (Risnes) og må være feil-lokalisert. |
Bibliography: |
From NGU's Reference Archive: |
Ragnhildstveit, J.; Naterstad, J. , 1993 |
Samnanger. Berggrunnskart; Samnanger; 12154; 1:50 000; sort/hvitt; |
;Norges geologiske undersøkelse;KART |
Heskestad, Britt; Hofshagen, Nina H.; Furnes, Harald; Pedersen, Rolf-Birger , 1994 |
The geochemical evolution of the Gulfjellet Ophiolite Complex, west Norwegian Caledonides |
;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.74 (2);77-88 pages |
Abstract: | |
The earliest (N-S to NE-SW striking) dykes and pillow lavas of the Lower Ordovician Gulfjellet Ophiolite Complex are dominated by N-MORB to IAT-types affinities, the IAT-type seems to become more abundant with time. This development is thought to reflect spreading-related magmatism is a 'supra-subduction' zone environment. Boninitic magmatism, represented by dominantly NE-SW to E-W trending dykes, post-dates the N-MORB and IAT, and suggests formation in a fore-arc setting. The occurr- ence of a few MORB-type dykes cutting boninite dykes may indicate formation of new oceanic crust, possibly associated with arc splitting. The rare occur- rence of post-MORB calc-alkalice magmatic activity may indicate a maturing stage of arc magmatic activity. |
The fact sheet was created on 25.04.2024 |
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