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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 1813 - 023 | |||||
| (Last updated 01.mar.2005) | |||||
Name of Deposit Area : Sørlielva |
| (Object Id : 1813,023,00,00) |
| Location |
| County : | Nordland (18) | Municipality : | Brønnøy (1813) |
| Map 1:50000: | Velfjord (1825-4) | Map 1:250000: | Mosjøen |
| Marking point: | Longitude: | 12.4268310 | Latitude: | 65.4046100 |
| EU89-UTM Zone 33 | (Coordinates IS confirmed) |
| X-coord: | 380522 m. | Y-coord: | 7255988 m. |
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| Commodity |
| Main Type: | Precious metals (Au,Ag,PGE) | Sub Type: | Gold | |
| Element(s): | Au |
| Production |
| Activity: | Exploration | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: |
| Importance |
| Public: | Little Importance (reg. 18.02.2015) |
| Economical: | Minor interest , (Confirmed 01.mar.2005 by Peter Ihlen) |
Operations |
| From - To | Activity | Comments | |
| 1982 - 1983 | Geochemistry | Company/Institution :BP Norge A/S Minerals | |
| 1994 - 1994 | Sampling | Company/Institution :NGU-malmreg. |
Mineralization |
| Era: | Paleozoic | Period: | Devonian | |
| Dating: | Method: | |||
| Genesis: | Hydrothermal vein | Form: | Plate | |
| Main texture: | Fracture filling | Min. distribution: | Irregular (scattered) |
| Main grain size: | Medium grained (1-3 mm) | Main alteration: | Silicification |
| Strike/Dip: | 283 / 80 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Paleozoic | Period: | Ordovician |
| Province: | Caledonides | |
| Geotec.unit: | Helgeland Nappe Complex | |
| Tectonic complex: | ||
| Igneous complex: | Bindal Batholith |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Calcite | Major mineral (>10%) | |
| Ore mineral | Pyrrhotite | Major mineral (>10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) | |
| Ore mineral | Gold | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Dioritt | Intrusive Original rock :Diorite |
|
| Host rock | Granodioritt | Intrusive Original rock :Granodiorite |
|
| Host rock | Gabbro | Intrusive Original rock :Gabbro |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Joints/Fractures | Strike/Dip :292 / 80 |
Information(s) in free text format |
| Free text |
| Forekomsten ble påvist av BP Norge A/S Minerals i forbindelse med regional prospektering etter gull i Helgeland og oppfølging av gullanomalier i grønnfjellområdet. Mineraliseringen er knyttet til en hydrotermal gang som stryker langs midten av Sørlielva. Gangen er 20-35 cm bred og kan følges over en strening på 50 m. Den består av kvarts med en sentralsone (10-20 cm bred) av hvit kalkspat. Sulfidene som hovedsakelig omfatter svovelkis er knyttet til kvartsranden av gangen og dens silifiserte og kvartsårete sidestein. Sulfidene finnes som disseminasjon og sprekkebelegg i disse partier. Sidesteinen omfatter fin- middelskornet og foliert dioritt-gabbro med gjennomsettende granittganger. Gangen skifter stedvis retning eller forgrenes. På dise steder når mineraliseringen mektigheter på 0,5-0,6 m. |
Bibliography: |
| From NGU's Reference Archive: |
| Myrland, Rolf , 1972 |
| Velfjord. Beskrivelse til det berggrunnsgeologiske gradteigskart I 18 - 1:100 000. |
| ;Norges geologiske undersøkelse;KARTBESKRIVELSE; TIDSSKRIFTARTIKKEL;NGU; Skrifter; No.274; 1;1-30 + ka pages |
| Abstract: | |
| The various lithologies are described. These comprise granitic basements rocks of supposed Pre-Cambrian age and Cambro-Silurian supracrustals and intrusives. The intrusives are mostly found within the Bindal and Velfjord massifs. These massifs are younger than the supracrustals, but their mutual age relationship is uncertain. Tectonically the rocks are sitated in "the high metamorphic nappe-complex" of central and western Helgeland. The supracrustal rocks have undergone at least three phases of Caledonian folding, the F2 phase producing the main regional structures. The rocks have mineral assemblages which place them in the almandine-amphibolite metamorphic facies. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| NO0837.01 | Bedrock |
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| NO0837.02 | Bedrock |
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| NO0837.03 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 1813 - 023 Sørlielva |
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# |
| NO0837.01 | Bedrock | 89 | 9 | -3 | 23 | 12 | .3 | 2469.0 |
| NO0837.02 | Bedrock | 206 | 9 | 4 | 69 | 26 | .6 | 5230.0 |
| NO0837.03 | Bedrock | 256 | 22 | -3 | 173 | 99 | .5 | 2359.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | Rh# | As* | Cd* | Ba* | Mo* | Sb* | Bi* |
| NO0837.01 | -3.0 | -3.0 | -5.0 | -2 | -.2 | 5 | 1.00 | -2 | 372 |
| NO0837.02 | -3.0 | -3.0 | -5.0 | 2 | -.2 | 10 | 1.00 | -2 | 516 |
| NO0837.03 | -3.0 | -3.0 | -5.0 | 4 | -.2 | 18 | 1.00 | -2 | 190 |
| ------------------ |
| Sample No. | S% | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* |
| NO0837.01 | 1.25 | 2 | 5 | 58 | 2.85 | -2.00 | -5.00 | 5 | 2.0 |
| NO0837.02 | 4.40 | 3 | 3 | 52 | 5.92 | 3.00 | -5.00 | -2 | 2.0 |
| NO0837.03 | 13.95 | 32 | 12 | 132 | 14.91 | 3.00 | 6.00 | -2 | 53.0 |
| ------------------ |
| Sample No. | La* | B* | |||||||
| NO0837.01 | 3.00 | 3 | |||||||
| NO0837.02 | 11.00 | 5 | |||||||
| NO0837.03 | 15.00 | -3 |
| The fact sheet was created on 17.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |