Norsk versjon | |||||
THE ORE DATABASE | |||||
Deposit Area 1739 - 036 | |||||
(Last updated 16.mai.2006) |
Name of Deposit Area : Gaizervann |
(Object Id : 1739,036,00,00) |
Location |
County : | Nord-Trøndelag (17) | Municipality : | Røyrvik (1739) |
Map 1:50000: | Skorovatn (1824-2) | Map 1:250000: | Grong |
Marking point: | Longitude: | 13.1357660 | Latitude: | 64.5466940 |
EU89-UTM Zone 33 | (Coordinates IS confirmed) |
X-coord: | 410611 m. | Y-coord: | 7159249 m. |
|
Commodity |
Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Copper | |
Element(s): | Cu Mo |
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 | |
1973 - 1973 | Geology | Company/Institution :Grong Gruber | |
1975 - 1975 | Sampling | Company/Institution :Grong Gruber | |
1979 - 1979 | Inspection | Company/Institution :NTH, F.M. Vokes | |
1982 - 1982 | Geology | Company/Institution :Grong Gruber | |
1990 - 1990 | Geology | Company/Institution :Norsulfid (U. Søvegjarto) | |
1996 - 1996 | Sampling | Company/Institution :NGU |
Mineralization |
Era: | Paleozoic | Period: | Ordovician | |
Dating: | Method: | |||
Genesis: | Porphyry-type | Form: | Irregular | |
Main texture: | Structureless | Min. distribution: | Disseminated (<20 % ore minerals) |
Main grain size: | Fine grained (< 1 mm) | Main alteration: | Sericitisation |
Strike/Dip: | Direction: | |||
Plunge: |
Stratigraphic classification of host rock |
Era: | Paleozoic | Period: | Ordovician |
Province: | Caledonides | |
Geotec.unit: | Køli Nappe Complex | |
Tectonic complex: | Gjersvik Nappe | |
Igneous complex: | Skorovass Complex |
Group: | Gjersvik | Formation: |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Plagioclase | Major mineral (>10%) | |
Gangue mineral | Quartz | Major mineral (>10%) | |
Gangue mineral | Sericite | Subordinate mineral (1-10%) | |
Ore mineral | Pyrite | Major mineral (>10%) | |
Ore mineral | Chalcopyrite | Subordinate mineral (1-10%) | |
Ore mineral | Molybdenite | Accessory mineral (<1%) | |
Ore mineral | Magnetite | Accessory mineral (<1%) |
Lithology: |
Relationship | Rock | Origin | |
Host rock | Trondhjemitt | Intrusive Original rock :Quartz diorite |
|
Metamorphic facies :Greenschist | |||
Host rock | Grønnstein | Extrusive Original rock :Basalt |
|
Metamorphic facies :Greenschist |
Structures |
Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
Host rock | Schistosity | Strike/Dip :248 / 90 | Post-mineralisation ;...Effect :Modifies | |
Wall rock | Foliation | Strike/Dip :260 / 60 | Post-mineralisation ;...Effect :None |
Information(s) in free text format |
Free text |
Forekomsten ligger 10 km rett S for Skorovatn. Adkomst derfra delvis etter en sti forbi drikkevannskilden til Skorovatn. Alternativ adkomst fra Berg gård i Sanddøladalen eller Arnbygget 6 km nordvest for Skjelbreitunet. Berggrunnen i området består av et grønnsteinsbelte inne i Limingengruppens arkoser. Grønnsteinen er intrudert av utallige trondhjemittlegemer. Området har mange punkter med mineralisering, Cu/Mo i kvartsårer i trondhjemitten og svovelkis/kobberkis disseminert og i årer i grønnsteinen. Området er tolket å tilhøre et stort porphyry-system som omfatter Fremstfjell-Skardfjell og Gaizervatn. Jane Enderby (1983) foreslår en genetisk modell der de tre delområdene representerer ulike nivåer i plutonen. Hun mener at Gaizervatn ligger høyest, slik at malmpotensialet her er det største sammenlignet med f.eks. Skardfjell der hun tror hele den eventuelle malmen er erodert bort. Det mindre skjerpet, Blåmuren består av en 30-40 cm mektig jernformasjon (magnetitt-pyritt-kvarts) som opptrer i tilknytning til en 5 - 15 m mektig chert/blåkvartsitt i grønnstein. |
Bibliography: |
From NGU's Reference Archive: |
Gale, George H. , 1975 |
Geology and sulphide mineralization in the Sanddøla-Gaizavann area, Grong, Nord-Trøndelag. |
;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.1293;65 pages |
Abstract: | |
Geologisk kartlegging i Grongfeltet i kartbladene Harran 1824 III, Grong 1823 IV, Andorsjøen 1823 I, Namsskogan 1824 II og Tunnsjøen 1924 III. Petrografisk og strukturgeologisk beskrivelse av bergartene. Beskrivelse av sulfidmineralisering og mulig porfyr Mo forekomst ved Fremstfjell. |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
NT0316.01 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Name of Sample point : Gaizervann |
(Object Id : 1739,036,00,01) |
Location |
County : | Nord-Trøndelag (17) | Municipality : | Røyrvik (1739) |
Map 1:50000: | Skorovatn (1824-2) | Map 1:250000: | Grong |
Marking point: | Longitude: | 13.1276080 | Latitude: | 64.5439870 |
EU89-UTM Zone 33 | (Coordinates IS confirmed) |
X-coord: | 410211 m. | Y-coord: | 7158959 m. |
|
Commodity |
Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Copper | |
Element(s): | Cu Mo |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
NT0316.02 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Name of Sample point : Gaizervann |
(Object Id : 1739,036,00,02) |
Location |
County : | Nord-Trøndelag (17) | Municipality : | Røyrvik (1739) |
Map 1:50000: | Skorovatn (1824-2) | Map 1:250000: | Grong |
Marking point: | Longitude: | 13.1376480 | Latitude: | 64.5466280 |
EU89-UTM Zone 33 | (Coordinates IS confirmed) |
X-coord: | 410701 m. | Y-coord: | 7159239 m. |
|
Commodity |
Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Copper | |
Element(s): | Cu Mo |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
NT0316.03 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Name of Sample point : Gaizervann |
(Object Id : 1739,036,00,03) |
Location |
County : | Nord-Trøndelag (17) | Municipality : | Røyrvik (1739) |
Map 1:50000: | Skorovatn (1824-2) | Map 1:250000: | Grong |
Marking point: | Longitude: | 13.1394870 | Latitude: | 64.5471890 |
EU89-UTM Zone 33 | (Coordinates IS confirmed) |
X-coord: | 410791 m. | Y-coord: | 7159299 m. |
|
Commodity |
Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Copper | |
Element(s): | Cu Mo |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
NT0316.04 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Name of Sample point : Gaizervann |
(Object Id : 1739,036,00,04) |
Location |
County : | Nord-Trøndelag (17) | Municipality : | Røyrvik (1739) |
Map 1:50000: | Skorovatn (1824-2) | Map 1:250000: | Grong |
Marking point: | Longitude: | 13.1582460 | Latitude: | 64.5474250 |
EU89-UTM Zone 33 | (Coordinates IS confirmed) |
X-coord: | 411691 m. | Y-coord: | 7159299 m. |
|
Commodity |
Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Copper | |
Element(s): | Cu Mo |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
NT0316.05 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Name of Locality : Blåmuren |
(Object Id : 1739,036,01,00) |
Location |
County : | Nord-Trøndelag (17) | Municipality : | Røyrvik (1739) |
Map 1:50000: | Skorovatn (1824-2) | Map 1:250000: | Grong |
Marking point: | Longitude: | 13.1303360 | Latitude: | 64.5437530 |
EU89-UTM Zone 33 | (Coordinates IS confirmed) |
X-coord: | 410341 m. | Y-coord: | 7158929 m. |
|
Commodity |
Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Copper | |
Element(s): | Kis Fe |
Production |
Activity: | Pitting | Reserves: | ||
Prod. method: | Production: | |||
Prod. status: | Volume of dump: |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Quartz | Major mineral (>10%) | |
Ore mineral | Pyrite | Major mineral (>10%) | |
Ore mineral | Magnetite | Major mineral (>10%) |
Lithology: |
Relationship | Rock | Origin | |
Wall rock | Blåkvartsitt | Sedimentary Original rock :Siliceous rock |
|
Metamorphic facies :Greenschist |
Information(s) in free text format |
Free text |
Skjerpet ligger ved en magnetittførende chert (blåkvarts) som er 5 - 15m mektig og kan følges over få hundre meter. I tilknytning til chert finnes få dm brede magnetittbenker, dels med pyritt bånd. |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
JS96017 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
from |
Deposit Area 1739 - 036 Gaizervann |
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# |
JS96017 | Bedrock | 8637 | 150 | -3 | 33 | 62 | 6.2 | 19.0 |
NT0316.01 | Bedrock | 8 | 15 | -3 | 6 | 7 | -.3 | 3.0 |
NT0316.02 | Bedrock | 809 | 6 | 3 | 2 | 1 | .6 | 6.0 |
NT0316.03 | Bedrock | 405 | 52 | -3 | 17 | 78 | -.3 | 1.0 |
NT0316.04 | Bedrock | 19 | 4 | -3 | 4 | 15 | -.3 | 1.0 |
NT0316.05 | Bedrock | 100 | 46 | -3 | 7 | 2 | -.3 | 2.0 |
------------------ |
Sample No. | Pt# | Pd# | Rh# | As* | Cd* | Ba* | Mo* | Sb* | Bi* |
JS96017 | 2.0 | 6.0 | -1.0 | 52 | .9 | 11 | 17.00 | -2 | 6 |
NT0316.01 | -1.0 | 1.0 | -1.0 | -2 | -.2 | 43 | 27.00 | -2 | 2 |
NT0316.02 | -1.0 | -1.0 | -1.0 | -2 | -.2 | 13 | 3.00 | -2 | 2 |
NT0316.03 | -1.0 | -1.0 | -1.0 | -2 | -.2 | 6 | 56.00 | -2 | -2 |
NT0316.04 | 1.0 | 6.0 | 2.0 | 3 | -.2 | 14 | 1591.00 | -2 | 2 |
NT0316.05 | 1.0 | 1.0 | -1.0 | -2 | -.2 | 26 | 31.00 | -2 | -2 |
------------------ |
Sample No. | S% | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* |
JS96017 | 8.09 | 130 | 30 | 1144 | 31.16 | 5.00 | -5.00 | 132 | 9.0 |
NT0316.01 | 2.55 | 11 | 4 | 59 | 2.28 | 3.00 | -5.00 | 7 | 76.0 |
NT0316.02 | .98 | 4 | 2 | 43 | 1.96 | 2.00 | -5.00 | 14 | 15.0 |
NT0316.03 | 1.02 | 102 | 213 | 751 | 5.36 | -2.00 | -5.00 | 3 | 294.0 |
NT0316.04 | .29 | 1 | 28 | 70 | 1.84 | -2.00 | -5.00 | 13 | 3.0 |
NT0316.05 | 1.00 | 8 | 2 | 72 | 3.33 | -2.00 | -5.00 | 15 | 19.0 |
------------------ |
Sample No. | La* | B* | |||||||
JS96017 | 4.00 | -3 | |||||||
NT0316.01 | 15.00 | 3 | |||||||
NT0316.02 | 3.00 | -3 | |||||||
NT0316.03 | -1.00 | -3 | |||||||
NT0316.04 | -1.00 | -3 | |||||||
NT0316.05 | 2.00 | -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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