(Last updated: 10.12.1998)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 5042 - 018 Ingjelsvatnet | |||||
| (Object Id: 343) (Last updated: 10.12.1998) |
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| Location |
| County: | Trøndelag | Municipality: | Lierne (5042) |
| Map 1:50000: | Tunnsjøen (1924-3) | Map 1:250000: | Grong |
| Coordinate system: | EU89-UTM Zone 33 |
| East: | 426491 m. | North: | 7172729 m. |
| Longitude: | 13.4599670 | Latitude: | 64.6714230 |
| Show on map |
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| Resource |
| Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Sulphides | |
| Element(s): | Kis |
| Importance |
| Raw material meaning: | Not Assessed (reg. 18.02.2015) |
| Resources and production |
| Activity: | Pitting | Reserves: | ||
| Operating method: | Historical production: |
Operations |
| From - To | Activity | Comments | |
| 1991 - 1991 | Sampling | Company/Institution :NGU |
Mineralization |
| Era: | Paleozoic | Period: | Ordovician | |
| Genesis: | Volcex | Form: | Layer | |
| Main texture: | Banded | Min. distribution: | Semi-massive (20-50 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: | Chloritisation |
| Strike/Dip: | 126 / 25 | 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 | Quartz | Major mineral (>10%) | |
| Gangue mineral | Chlorite | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Greenstone | Extrusive Original rock :Basalt |
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| Metamorphic facies :Greenschist | |||
| Wall rock | Chert | Sedimentary Original rock :Exhalite |
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| Metamorphic facies :Greenschist | |||
| Wall rock | Quartz porphyry | Extrusive Original rock :Rhyolite |
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| Metamorphic facies :Greenschist |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Foliation | Strike/Dip :126 / 25 | Post-mineralisation ;...Effect :Modifies |
Information(s) in free text format |
| Free text |
| Mineraliseringen ligger 400 m nord for Ingjelsvatnet og 50 m vest for bekken fra Midttjern, midt i en sti. Blotning i en 3 x 4 m knaus. Det er skutt ett lite hull. Malmen er en typisk vasskis; massiv, båndet, pyrittmalm som er ca. 1 m mektig. Under malmen ligger lys grønnstein, og over dennefinnes en tynn chert-horisont og finkornet, kvartsporfyr. |
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 | ||||
| LS91134 | Bedrock |
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| LS91135 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 5042 - 018 Ingjelsvatnet |
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# |
| LS91134 | Bedrock | 24 | 272 | 22 | 14 | 49 | .5 | 48.0 |
| LS91135 | Bedrock | 139 | 258 | 29 | 19 | 61 | .2 | 21.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| LS91134 | 1.0 | 1.0 | 270 | .2 | 7 | 21.00 | 2 | 2 | 25.03 |
| LS91135 | 1.0 | 1.0 | 155 | .2 | 6 | 25.00 | 2 | 2 | 18.50 |
| ------------------ |
| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| LS91134 | 18 | 26 | 459 | 20.29 | 2.00 | 5.00 | 1 | 1.0 | 2.00 |
| LS91135 | 55 | 68 | 1176 | 24.11 | 2.00 | 5.00 | 1 | 2.0 | 2.00 |
| ------------------ |
| Sample No. | B* | ||||||||
| LS91134 | 6 | ||||||||
| LS91135 | 2 |
| The fact sheet was created on 03.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |