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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 1742 - 015 | |||||
| (Last updated 16.mai.2006) | |||||
Name of Deposit Area : Reinsjøen |
| (Object Id : 1742,015,00,00) |
| Location |
| County : | Nord-Trøndelag (17) | Municipality : | Grong (1742) |
| Map 1:50000: | Skorovatn (1824-2) | Map 1:250000: | Grong |
| Marking point: | Longitude: | 13.0166690 | Latitude: | 64.5206330 |
| EU89-UTM Zone 33 | (Coordinates IS confirmed) |
| X-coord: | 404811 m. | Y-coord: | 7156519 m. |
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| 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: | 0 m3 |
| Importance |
| Public: | Little Importance (reg. 18.02.2015) |
| Economical: | Minor interest |
Operations |
| From - To | Activity | Comments | |
| 1975 - 1975 | Sampling | Company/Institution :Grong Gruber |
Mineralization |
| Era: | Paleozoic | Period: | Ordovician | |
| Dating: | Method: | |||
| Genesis: | Volcex | Form: | Irregular | |
| Main texture: | Structureless | Min. distribution: | Disseminated (<20 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: | No country rock alteration |
| 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 | |
| Ore mineral | Pyrite | Major mineral (>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 i en stor rustsone ved SØ-enden av Reinsjøen, 13 km rett syd for Skorovatn. Den er beskrevet av Oftedahl (1958) som grønnstein med svovelkisimpregnasjon som dels er ganske rik uten at massiv kis er sett. Ved befaring i 1994 ble flekkvise rustsoner observert langs VNV-ØSØ orienterte skar, men mineraliseringene er helt ubetydelige. Skjerpeaktivitet er ikke påvist. |
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 | ||||
| JS94363 | Bedrock |
|
| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 1742 - 015 Reinsjøen |
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# |
| JS94363 | Bedrock | 258 | 187 | -2 | 8 | -1 | .4 | 8.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sn* | Sb* | Bi* |
| JS94363 | -5.0 | 7.0 | 46 | -1.0 | 18 | 4.00 | -20 | -5 | 11 |
| ------------------ |
| Sample No. | S% | V* | Cr* | Mn* | Fe% | W* | Sr* | Y* | La* |
| JS94363 | 4.47 | 33 | 211 | 1415 | 7.37 | -20 | 5.0 | 3.0 | -1.00 |
| ------------------ |
| Sample No. | Te* | ||||||||
| JS94363 | -10.00 |
| The fact sheet was created on 16.01.2025 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2025 Geological Survey of Norway |