Norsk versjon | |||||
THE ORE DATABASE | |||||
Deposit Area 1739 - 017 | |||||
(Last updated 16.mai.2006) |
Name of Deposit Area : Gudfjelløya |
(Object Id : 1739,017,00,00) |
Location |
County : | Nord-Trøndelag (17) | Municipality : | Røyrvik (1739) |
Map 1:50000: | Tunnsjøen (1924-3) | Map 1:250000: | Grong |
Marking point: | Longitude: | 13.3692890 | Latitude: | 64.7298680 |
EU89-UTM Zone 33 | (Coordinates IS confirmed) |
X-coord: | 422332 m. | Y-coord: | 7179349 m. |
|
Commodity |
Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Sulphides | |
Element(s): | Kis |
Production |
Activity: | Exploration | Reserves: | ||
Prod. method: | Production: | |||
Prod. status: | Volume of dump: |
Importance |
Public: | Little Importance (reg. 18.02.2015) |
Economical: | Minor interest |
Operations |
From - To | Activity | Comments | |
1991 - 1991 | Sampling | Company/Institution :NGU |
Mineralization |
Era: | Paleozoic | Period: | Ordovician | |
Dating: | Method: | |||
Genesis: | Volcex | Form: | Layer | |
Main texture: | Banded | Min. distribution: | Massive (>50 % ore minerals) |
Main grain size: | Medium grained (1-3 mm) | Main alteration: |
Strike/Dip: | 60 / 30 | Direction: | ||
Plunge: |
Stratigraphic classification of host rock |
Era: | Paleozoic | Period: |
Province: | Caledonides | |
Geotec.unit: | Køli Nappe Complex | |
Tectonic complex: | Gjersvik Nappe | |
Igneous complex: | Skorovass Complex |
Group: | Gjersvik | Formation: |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Quartz | Major mineral (>10%) | |
Gangue mineral | Chlorite | Major mineral (>10%) | |
Gangue mineral | Plagioclase | Major mineral (>10%) | |
Ore mineral | Pyrite | Major mineral (>10%) | |
Ore mineral | Magnetite | Subordinate mineral (1-10%) |
Lithology: |
Relationship | Rock | Origin | |
Host rock | Greenstone | Extrusive Original rock :Basalt |
|
Metamorphic facies :Greenschist |
Information(s) in free text format |
Free text |
Forekomsten ligger ca. ved kote 650 på NV-siden av toppen på Gudfjelløya. Terrenget her er åpent og lite overdekket. For å komme hit må man ha båt fra Møkkelviktangen og gå den merkede stien fra Øyheim. Man bøyer av mot nord ved kote 600 (hvor stien dreier mot sør). Meget bratt! En mer enn 300 m lang horisont, hvor den totale rustsonen kan bli nesten 10 m mektig. Det meste av mektigheten utgjøres av disseminert svovelkis i grønnstein. Vasskishorisonten, som er smal og av ujevn mektighet, viser skjelett-tekstur på overflaten,- et forvitringsfenomen. Liggen utgjøres av grønnskifer. En blotning nede ved Tunnsjøen på NØ-siden av øya er horisontens fortsettelse mot nord. Rustsonen sees forøvrig fra riksveien på "fastlandet". Mot Brennbakken forsvinner sonen, muligens under overdekning. Analyser av disseminert svovelkis viser 0.2 % Zn og 0.4 % Mn. |
Bibliography: |
From NGU's Reference Archive: |
Oftedahl, Christoffer , 1958 |
Oversikt over Grongfeltets skjerp og malmforekomster. |
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.202;1-75 + fo pages |
Abstract: | |
Ore occurences of the Grong area: In the period 1910-1918 a great number of ore occurences were discovered in the Grong area. The late state geologist Steinar Foslie mapped the area in the years 1922-1931. Foslie also mapped all claims and occurences and made special field investigations in a few cases. This book presents a survey of all occurences chiefly based on the field observations of Foslie. In addition the present author has done some field work in connection with the three large deposits, Joma, Skorovass, and Gjersvik. The map, Plate 1, shows the areal geology and the location of the occurrences, numbered from 1 to 131. the ore of the occurrences is chiefly pyrite. The larger occurrences also contain some chalcopyrite and sphalerite etc. and the smaller occurrences contain ither pure pyrite with some magnetite. The Joma deposit (No. 1), contains about 15.5 mill. tons of ore. The ore zone forms an arc and is situated within a thick series of greenstones (Fig. 1). The Skorovass mine (No. 2), contains about 7,5 mill. tons of ore. The deposit is situated in a greenstone complex (Fig. 7), and is immediately surrounded by asid tuffs of quartz keratophyric composition (Table 1). |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
LS91115 | Bedrock |
|
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LS91116 | Bedrock |
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LS91117 | Bedrock |
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NB! All analyse values are shown at the end of the printout.: |
Name of Sample point : Gudfjelløya |
(Object Id : 1739,017,00,01) |
Location |
County : | Nord-Trøndelag (17) | Municipality : | Røyrvik (1739) |
Map 1:50000: | Tunnsjøen (1924-3) | Map 1:250000: | Grong |
Marking point: | Longitude: | 13.3651840 | Latitude: | 64.7282970 |
EU89-UTM Zone 33 | (Coordinates IS confirmed) |
X-coord: | 422132 m. | Y-coord: | 7179179 m. |
|
Commodity |
Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Sulphides | |
Element(s): | Kis |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
LS91118 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
from |
Deposit Area 1739 - 017 Gudfjelløya |
Element analyses |
( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.) |
Sample No. | Sample Type | Cu* | Zn* | Pb* | Co* | Ni* | Ag* | Au# |
LS91115 | Bedrock | 135 | 1478 | 9 | 40 | 17 | .8 | 19.0 |
LS91116 | Bedrock | 561 | 55 | 65 | 38 | 19 | 5.1 | 41.0 |
LS91117 | Bedrock | 45 | 202 | 88 | 5 | 26 | 7.7 | 56.0 |
LS91118 | Bedrock | 78 | 16 | 12 | 33 | 20 | 1.5 | 29.0 |
------------------ |
Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
LS91115 | 1.0 | 1.0 | 31 | 2.9 | 5 | 1.00 | 2 | 2 | 5.41 |
LS91116 | 1.0 | 1.0 | 164 | .2 | 3 | 12.00 | 2 | 12 | 24.02 |
LS91117 | 1.0 | 1.0 | 54 | .2 | 10 | 28.00 | 2 | 2 | 18.62 |
LS91118 | 1.0 | 1.0 | 96 | .2 | 14 | 105.00 | 2 | 2 | 10.30 |
------------------ |
Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
LS91115 | 204 | 13 | 4552 | 11.41 | 1.00 | 5.00 | 1 | 5.0 | 2.00 |
LS91116 | 9 | 13 | 108 | 19.09 | 1.00 | 5.00 | 1 | 2.0 | 2.00 |
LS91117 | 10 | 41 | 163 | 17.77 | 1.00 | 5.00 | 1 | 1.0 | 2.00 |
LS91118 | 78 | 9 | 117 | 11.38 | 1.00 | 5.00 | 1 | 30.0 | 2.00 |
------------------ |
Sample No. | B* | ||||||||
LS91115 | 2 | ||||||||
LS91116 | 8 | ||||||||
LS91117 | 6 | ||||||||
LS91118 | 3 |
The fact sheet was created on 19.05.2024 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
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