Norsk versjon
	THE ORE DATABASE
	Deposit Area 1936 - 001
	(Last updated 09.aug.2024)

Importance

Public:

(No data)

Economical:

Could be significant , (Confirmed 04.jun.2020 by Hannekristin Paulsen)

Operations

	From - To	Activity	Comments
	2012 - 2012	Core drilling	Company/Institution :Store Norske Gull

Mineralization

	Era:		Period:
	Dating:		Method:
	Genesis:		Form:
	Main texture:		Min. distribution:

Main grain size:

Main alteration:

	Strike/Dip:		Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Period:

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex:

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Formation:

Information(s) in free text format

References

Ojala, J.V., Hansen, H. & Ahola, H. 2013: Cu-Zn mineralisation at Vannareid, West Troms Basement Complex: a new Palaeoproterozoic VMS occurrence in the northern Fennoscandian Shield. Abstracts and proceedings, 12th Biennial SGA Meeting. Paulsen, H-.K., Bergh, S. G., Palinkas, S. S. 2019: Late Palaeozoic fault-controlled hydrothermal Cu–Zn mineralisation on Vanna island, West Troms Basement Complex, northern Norway. Norsk Geologisk Tidsskrift 100, 1-41.

Bibliography:

From NGU's Reference Archive:

Paulsen, Hanne-Kristin; Bergh, Steffen G.; Palinkas, Sabina Strmic , 2020

	Late Palaeozoic fault-controlled hydrothermal Cu–Zn mineralisation on Vanna island, West Troms Basement Complex, northern Norway

;Geological Society of Norway;ARTIKKEL;Norwegian journal of geology; No.100 (1);41 s. pages

Abstract:

The Vannareid–Burøysund fault is a major, brittle, normal fault in northern Norway, with cohesive fault rocks (cataclasites) that host Cu–Zn-bearing quartz-carbonate veins. The fault is exposed on the island of Vanna in the Neoarchaean to Palaeoproterozoic West Troms Basement Complex, separating variably deformed tonalitic gneisses in the footwall from mylonitised metasedimentary rocks and tonalites in the hanging wall. Radiometric dating (K–Ar illite) of normal fault movement along the Vannareid–Burøysund fault yielded a late Permian age, concurrent with incipient post-Caledonian continental rifting. The fault evolution and internal architecture of the Vannareid–Burøysund fault largely controlled the spatial distribution of mineralisation, and two main phases of the Cu–Zn mineralisation have been discerned. Early quartzsphalerite veins are deposited in the cataclastic fault core zone, where initial movement along the fault created a fluid conduit that allowed for fluid flow and sphalerite deposition. With subsequent movement and widening of the fault zone, a later and spatially more extensive generation of quartz-chalcopyrite veins were deposited in both the fault core and the damage zones. Fluid inclusion micro-thermometry revealed that the ore-forming fluids were highly saline aqueous solutions (20–37 wt.% NaCl + CaCl2) that carried base metals and sulphur. Further, the isotopic composition of hydrothermal carbonates indicates a magmatic source for the CO2. The structural data and obtained geochemical results indicate that the Cu–Zn mineralisation in the Vannareid–Burøysund fault was epigenetic and strongly controlled by extensional brittle faulting and cataclasis during early stages of post-Caledonian (Permian) continental rifting, thus providing a new model for exploration of post-Caledonian hydrothermal ore deposits in basement rocks of northern Norway.

References not to be found in NGU's Reference Archive.:

Ojala, J.V., Hansen, H. & Ahola, H. 2013: Cu-Zn mineralisation at Vannareid, West Troms Basement Complex: a new Palaeoproterozoic VMS occurrence in the northern Fennoscandian Shield. Abstracts and proceedings, 12th Biennial SGA Meeting.

Name of Locality : Storvatnet VNR-101

(Object Id : 1936,001,01,00)

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Location

County :

Troms (19)

Municipality :

Karlsøy (1936)

Map 1:50000:

Helgøy (1535-2)

Map 1:250000:

Helgøy

Marking point:

Longitude:

19.6702760

Latitude:

70.2131600

EU89-UTM Zone 34

(Coordinates IS confirmed)

X-coord:

449764 m.

Y-coord:

7790193 m.

Commodity

	Main Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Sub Type:	Zinc
			Element(s):	Cu Zn

Production

	Activity:	Exploration	Reserves:
	Prod. method:		Production:
	Prod. status:		Volume of dump:

Information(s) in free text format

Free text

Locality for diamond drill hole Storvatnet VNR-101

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The fact sheet was created on 24.11.2024

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

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