(Last updated: 08.05.2006)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 3427 - 035 Dølvad | |||||
| (Object Id: 6449) (Last updated: 08.05.2006) |
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| Location |
| County: | Innlandet | Municipality: | Tynset (3427) |
| Map 1:50000: | Einunna (1519-1) | Map 1:250000: | Røros |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 559367 m. | North: | 6929899 m. |
| Longitude: | 10.1522650 | Latitude: | 62.4953960 |
| Show on map |
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| Resource |
| Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Lead | |
| Element(s): | Pb |
| Importance |
| Raw material meaning: | Little Importance (reg. 18.02.2015) |
| Resources and production |
| Activity: | Pitting | Reserves: | ||
| Operating method: | Historical production: |
Operations |
| From - To | Activity | Comments | |
| 1962 - 1962 | Inspection | Company/Institution :A/S Kviknemalm | |
| 1998 - 1998 | Sampling | Company/Institution :NGU |
Mineralization |
| Genesis: | Hydrothermal vein | Form: | Lens | |
| Main texture: | Cavity filling | Min. distribution: | Disseminated (<20 % ore minerals) |
| Main grain size: | Coarse grained (> 3 mm) | Main alteration: | No country rock alteration |
| Strike/Dip: | 330 / 60 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Neoproterozoic |
| Province: | Caledonides | |
| Geotec.unit: | Trondheim Nappe Complex | |
| Tectonic complex: | Gula Nappe | |
| Igneous complex: |
| Group: | Gula | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Calcite | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) | |
| Ore mineral | Galena | Major mineral (>10%) | |
| Ore mineral | Bismuth | Accessory mineral (<1%) | |
| Ore mineral | Chalcopyrite | Accessory mineral (<1%) | |
| Ore mineral | Tetrahedrite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Quartz-mica schist | Sedimentary Original rock :Greywacke |
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| Metamorphic facies :Amphibolite |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Foliation | Strike/Dip :24 / 12 | Pre-mineralisation ;...Effect :None |
Information(s) in free text format |
| Free text |
| Mineraliseringen ble befart av H.N. Ross for A/S Kviknemalm i 1962 (Ross 1962), men ingen andre opplysninger om tidligere aktivitet finnes. Den ligger ved elvebredden på nordvestsida av Orkla. En bilvei som ble utbedret i forbindelse med kraftutbygging går fra Yset fram til elva, rett sør for Dølvadsætra. Derfra er det en km sørvestover fram til forekomsten hvor kun mindre arbeid er utført. Grovkornete aggregater av pyritt og blyglans opptrer i hulrom i en kvartsgang som er opptil 0.5 m bred (prøve .01). Kvartsgangen har orientering 330°/60° og skjærer foliasjonen (24°/12°) i omgivende kvarts-biotitt skifer/gneis. Gangen kan følges nordvestover i en lengde av 4 m før den blir borte under overdekke og fortsetter også under elva mot sørvest. Flere slike kvartsganger som dels er gjennomskjærende og dels konkordante foliasjonen i gneissen finnes videre sørover langs elva. Ca. 140 m sør for skjerpet er en tilnærmet konkordant kvartsgang med grovkornete pyritt-blyglans aggregater prøvetatt (prøve .02). Den er 20-30 cm mektig og er orientert 26°/12°. |
| Photo(s) from the Deposit area: |
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Bibliography: |
| From NGU's Reference Archive: |
| Ross, H. N. , 1962 |
| A/S Kviknemalm. Blyglans ved Dølvad. |
| ;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3803;2 pages |
| Abstract: | |
| Rapporten beskriver kort følgede skjerp: - Dølvad skjerp med blyglans og kismineralisering på kvartsganger er en ubetydelig forekomst. - Vakkerliens skjerp med magnetkis, kobber og svovelkis. Malmganen kan følges i dagen flere km som en rustsone. Ikke uten interesse i en større sammenheng. Regional undersøkelse nødvendig. |
| Nilsen, Odd , 1978 |
| Caledonian sulphide deposits and minor iron-formations from the southern Trondheim region, Norway. |
| ;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.340;35-85 + k pages |
| Abstract: | |
| Within the southern and central parts of the Trondheim region of the Norwegian Caledonides a great number of small, stratabound cupriferous pyrite deposits are confined to mafic metavolcanics of the Gula, Støren and Fundsjø Groups of the Lower Palaeozoic succession. The deposits occuring within, or in close contact with the metavolcanics are characterized by their association with minor manganiferous oxide/silicate iron-formations - better known as "vasskis" ore type - within the metamorphic low-grade areas. The iron-fprmations of the metamorphic higher grade terrains on the other hand, which are extensively developed within the Gula Group, are mostly of a pyrrhotitic sulphide/silicate type and sulphurization processes are thought to have played an important role during the metamorphism. The pyrite deposits occurring adjacent to the metavolcanics bear no relationship to the iron-formations. They are embedded in pelitic, often carbonaceous assemblages (Gula Group) or within tuffitic members of the volcanogene Støren Group, and they are thought to represent re-sedimented (reworked) deposits. The pyrite deposits display varying degree of metamorphic reconstitution and a tectonic control has apparently determined their disc- or ruler-shaped morphology. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| HE0135.01 | Dump |
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| NB! All analyse values are shown at the end of the printout.: |
Name of Sample point: Dølvad |
| (Object Id: 10205 35,00,01) |
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| Location |
| County: | Innlandet | Municipality: | Tynset (3427) |
| Map 1:50000: | Einunna (1519-1) | Map 1:250000: | Røros |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 559328 m. | North: | 6929779 m. |
| Longitude: | 10.1514480 | Latitude: | 62.4943260 |
| Show on map |
|
|
| Resource |
| Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Lead | |
| Element(s): | Pb |
| Photo(s) from the Deposit area: |
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Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| HE0135.02 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 3427 - 035 Dølvad |
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# |
| HE0135.01 | Dump | 126 | 26 | 37659 | 5 | 67 | 37.7 | 7.0 |
| HE0135.02 | Bedrock | 59 | 19 | 6681 | 6 | 64 | 5.8 | 1.0 |
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| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| HE0135.01 | .5 | .5 | 77 | 10.2 | 184 | 1.00 | 2 | 201 | 5.45 |
| HE0135.02 | .5 | .5 | 2 | 2.0 | 34 | 1.00 | 2 | 39 | 1.12 |
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| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| HE0135.01 | 1 | 8 | 14 | 4.96 | 1.00 | 4.00 | 1 | 32.0 | 0.50 |
| HE0135.02 | 1 | 7 | 37 | 1.87 | 1.00 | 4.00 | 1 | 14.0 | 1.00 |
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| Sample No. | B* | ||||||||
| HE0135.01 | 2 | ||||||||
| HE0135.02 | 2 |
| The fact sheet was created on 09.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |