Norsk versjon | |||||
THE ORE DATABASE | |||||
Occurence 5043 - 022 Mariafjellet | |||||
(Object Id: 260) (Last updated: 16.02.2005) |
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Location |
County: | Trøndelag | Municipality: | Raarvihke (5043) |
Map 1:50000: | Røyrvik (1924-4) | Map 1:250000: | Grong |
Coordinate system: | EU89-UTM Zone 33 |
East: | 429532 m. | North: | 7183459 m. |
Longitude: | 13.5183760 | Latitude: | 64.7683210 |
Show on map |
|
Resource |
Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron | |
Element(s): | Fe |
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 | |
1994 - 1994 | Inspection | Company/Institution :NGU |
Mineralization |
Era: | Paleozoic | Period: | Ordovician | |
Genesis: | Volcex | Form: | Layer | |
Main texture: | Banded | Min. distribution: | Massive (>50 % ore minerals) |
Main grain size: | Fine grained (< 1 mm) | Main 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: | Gjervik | Formation: |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Quartz | Major mineral (>10%) | |
Ore mineral | Magnetite | Major mineral (>10%) | |
Ore mineral | Pyrite | Subordinate mineral (1-10%) |
Lithology: |
Relationship | Rock | Origin | |
Wall rock | Grønnstein | Extrusive Original rock :Basalt |
|
Metamorphic facies :Greenschist |
Information(s) in free text format |
Free text |
Forekomstene ligger langs en trang dal på sørsida av Mariafjellet. Kun mindre arbeider er gjort i området. Mineraliseringene består av båndete jernmalmer, som er opptil 30 cm mektige, i grønnstein. Noen cm brede bånd med massiv magnetitt veksler med finkornet kvarts og Mn-førende granat. Få idiomorfe pyritt-korn opptrer spredt i og langs kanten av BIF-sonene. Den massive jernmalmen er i kontakt med opptil 1 m mektige magnetittførende kvartsitt (blåkvartsitt). En rekke lignende BIF horisonter, opptil 1.5 m mektige, i Mariafjell-området er beskrevet av Oftedahl. De kan lettest studeres sørvest for fjellet, fra Tunnsjøen og oppover langs Brennbergbekken. |
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 | ||||
JS94190 | Bedrock |
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1183 | Bedrock |
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1184 | Bedrock |
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1185 | Bedrock |
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1186 | Bedrock |
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1187 | Bedrock |
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NB! All analyse values are shown at the end of the printout.: |
Name of Locality: Skjerp 1 |
(Object Id: 480 22,01,00) |
|
Location |
County: | Trøndelag | Municipality: | Raarvihke (5043) |
Map 1:50000: | Røyrvik (1924-4) | Map 1:250000: | Grong |
Coordinate system: | EU89-UTM Zone 33 |
East: | 429281 m. | North: | 7183419 m. |
Longitude: | 13.5131410 | Latitude: | 64.7679090 |
Show on map |
|
Resource |
Resource Type: | Ferrous metals(Fe, Mn, Ti) | Resource Subtype: | Iron | |
Element(s): | Fe |
Resources and production |
Activity: | Pitting | Reserves: | ||
Operating method: | Historical production: |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
JS94188 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
from |
Deposit Area 5043 - 022 Mariafjellet |
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# |
JS94188 | Bedrock | 30 | 57 | -2 | 6 | 12 | .2 | -1.0 |
JS94190 | Bedrock | 13 | 32 | -2 | 10 | 11 | .4 | -1.0 |
1183 | Bedrock | 121 | 176 | 137 | 3 | 27 | 1.2 | 41.0 |
1184 | Bedrock | 220 | 59 | 81 | 3 | 24 | 2.0 | 128.0 |
1185 | Bedrock | 112 | 117 | 151 | 1 | 27 | 1.8 | 122.0 |
1186 | Bedrock | 118 | 15285 | 16 | 14 | 18 | 1.0 | 38.0 |
1187 | Bedrock | 836 | 932 | 8 | 5 | 13 | 1.0 | 32.0 |
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Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sn* | Sb* | Bi* |
JS94188 | -5.0 | 1.0 | 9 | -1.0 | 21 | 2.00 | -20 | -5 | 11 |
JS94190 | -5.0 | -1.0 | 25 | -1.0 | 27 | 2.00 | -20 | -5 | 6 |
1183 | 2.0 | 6.0 | 27 | .8 | 8 | 1.00 | 2 | 3 | |
1184 | 3.0 | 8.0 | 20 | .2 | 6 | 3.00 | 2 | 2 | |
1185 | 14.0 | 20.0 | 15 | .2 | 5 | 5.00 | 2 | 3 | |
1186 | 2.0 | 3.0 | 16 | 60.7 | 5 | 6.00 | 2 | 2 | |
1187 | 1.0 | 2.0 | 14 | 4.2 | 6 | 9.00 | 2 | 2 |
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Sample No. | S% | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* |
JS94188 | .27 | 90 | 152 | 938 | 9.03 | -20 | 22.0 | ||
JS94190 | .63 | 38 | 215 | 3556 | 7.72 | -20 | 20.0 | ||
1183 | 28.51 | 49 | 12 | 248 | 26.55 | 3.00 | 5.00 | 1 | 11.0 |
1184 | 40.12 | 31 | 6 | 17 | 26.07 | 3.00 | 5.00 | 1 | 1.0 |
1185 | 35.63 | 97 | 3 | 63 | 29.42 | 3.00 | 5.00 | 1 | 1.0 |
1186 | 29.81 | 69 | 5 | 63 | 23.98 | 2.00 | 5.00 | 3 | 1.0 |
1187 | 16.78 | 4 | 2 | 6 | 14.60 | 1.00 | 5.00 | 2 | 1.0 |
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Sample No. | Y* | La* | B* | Te* | |||||
JS94188 | 7.0 | -1.00 | -10.00 | ||||||
JS94190 | 2.0 | -1.00 | -10.00 | ||||||
1183 | 4.00 | 2 | |||||||
1184 | 2.00 | 2 | |||||||
1185 | 2.00 | 2 | |||||||
1186 | 2.00 | 2 | |||||||
1187 | 2.00 | 3 |
The fact sheet was created on 04.05.2024 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
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