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THE ORE DATABASE
Deposit 4637 - 006 Orkheia
(Object Id: 12380)
(Last updated: 16.03.2017)

Location
County: Vestland Municipality: Hyllestad (4637)
Map 1:50000: Dale (1117-1) Map 1:250000: Florø
Coordinate system: EU89-UTM Zone 32
East: 293028 m. North: 6798173 m.
Longitude: 5.1397810 Latitude: 61.2627760
Show on map

Resource
Resource Type: Ferrous metals(Fe, Mn, Ti) Resource Subtype: Titanium
Element(s): Ti Rutile
Importance
Raw material meaning: National Importance (reg. 03.06.2015)

Resources and production
Activity: Exploration Reserves: 30000 thousand tons
Operating method: Historical production:


Products
Element/product Crude ore grade or quality Reg. date
TiO2 3 % 16.12.2008

Operations
From - To Activity Comments
1994 - 1995 Sampling Company/Institution :NGU
Sampled by NGU in a collaboration project between NGU and DuPont/Conoco.

Mineralization
Era: Paleozoic Period: Devonian
Genesis: Metamorphic formation Form: Plate
Main texture: Banded Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Amphibolisation
Strike/Dip: Direction:
Plunge:
Ti-deposit type(s)
Main type: Metamorphic Ilm/Mt-ratio:
Sub type: Rutile in eclogite %TiO(Ore):
Titanium province: Sunnfjord %P2O5(Ore):
Host rock: Eclogite %MgO(Ilm):
Main Ti mineral: Rutile %V2O3(Mt):
ppm U (Rutile):
Stratigraphic classification of host rock
Era: Proterozoic Period: Mesoproterozoic
Province: Caledonian Basement Province
Geotec.unit: Western Gneiss Region
Tectonic complex:
Igneous complex:
Group: Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Garnet Major mineral (>10%)
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Pyroxene Major mineral (>10%)
Ore mineral Rutile Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Host rock Eclogite Intrusive
Original rock :Gabbro
Metamorphic facies :Eclogite
Wall rock Gneiss

Information(s) in free text format
Free text
The Orkheia eclogite is a E-W trending eclogite body; it resembles a thick eclogite sheet occupying the upper part of the Orkheia mountain approximately 400m above sea level. The mineralogy is very similar to Ramsgrønova. The deposit was samples in 1994-95 in a collaboration project between DuPont/Conoco, Stokke Industri and NGU; sampling was done by a small percussion drill machine talking drill dust samples for analyses, and by a ca. 200m long diamond drill-hole near the eastern end. The titanium content in the various samples available shows a continually variation from less than 1 % TiO2 to 6-7 % TiO2. More than 90% of the titanium occurs in rutile. Orkheia may contain slightly higher rutile content than Ramsgrønova. Approx. 1/3 of the southern part of the eclogite (the main body; see the geological map in NGU-report 2000.123 (Korneliussen and Furuhaug 2003)) is believed to contain at least 3 % TiO2 in average. A rough estimation of the ore resource is as follows: 1200 m (the length of the main body) x 200 m (average width) x 100 m (estimated average depth) x 3.2 tons/m3 (estimated average specific density) is equivalent to 80 million tons; of this amount approximately 1/3, i.e. 25-30 million tons contains at least 3 % rutile. The deposit has a good mineralogical quality and a larger rutile grain size than the eclogites in the Førdefjord area, such as Engebøfjellet. There is little doubt that the larger area (Orkheia + Ramsgrønova + Saurdal/Gjølanger) has a significant rutile potential.

Photo(s) from the Deposit area:
Photo no. 1 showing Geol kart Orkheia"

Bibliography:
From NGU's Reference Archive:
Korneliussen, Are; Furuhaug, Leif , 2000
On the rutile deposit Ramsgrønova, Orkheia, Ødegården and Lindvik- kollen, S. Norway
;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.2000.123;35 pages

Korneliussen, Are ; McLimans, Roger ; Braathen, Alvar ; Erambert, Muriel ; Lutro, Ole ; Ragnhildstveit, Jomar , 2000
Rutile in eclogites as a mineral resource in the Sunnfjord Region, Western Norway.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.436;39-47 pages
Abstract:
The world's resources of the primary titanium raw materials ilmenite and rutile are very large. However, there is a lack of high-grade, high-quality ilmenite deposits as well as good rutile deposits. Particular focus has been given to rutilebearing eclogites in the Sunnfjord region of western Norway, due to a combination of factors such as high rutile content over significant volumes of rock and favourable rutile grainsize. Eclogites in the Sunnfjord region are found in a number of elongated lenses up to 3-4 km long, surrounded by gneisses of amphibolitic to granite composition, as well as numerous smaller eclogite bodies and eclogitised mafic layers in gneisses. The eclogites originated by high-pressure and temperature alteration of Proterozoic, Fe-Ti rich, gabbroic rocks, and were strongly deformed under eclogite-facies netamorphism and thereafter variably affected by retrograde processes. Eclogites in which conversation of ilmenite to rutle was complete and in which this mineral assemblage was negligibly affected by subsequent retrograde processes, are those of greatest economic potential. An example of such an eclogite is the Engebøfjellet eclogite on the north side of Førdefjord, Naustdal commune.

Fieldsamples
Sample No. Sample type Miscellanrous
K146A.93 Bedrock
Sampler: Are Korneliussen/...Stored: Løkken
Comment: Eclogite
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
K153A.93 Bedrock
Sampler: Are Korneliussen/...Stored: Løkken
Comment: Eclogite
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
K153B.93 Bedrock
Sampler: Are Korneliussen/...Stored: Løkken
Comment: Eclogite
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
K153C.93 Bedrock
Sampler: Are Korneliussen/...Stored: Løkken
Comment: Eclogite
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
K153E.93 Bedrock
Sampler: Are Korneliussen/...Stored: Løkken
Comment: Eclogite
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
K153F.93 Bedrock
Sampler: Are Korneliussen/...Stored: Løkken
Comment: Eclogite
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
K255.94 Bedrock
Sampler: Are Korneliussen/...Stored: Løkken
Comment: Eclogite
No. of registrated element analyses = 1
No. of registrated oxide analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 4637 - 006 Orkheia

Element analyses

( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)
Sample No. Sample Type Cu* Zn* Pb* Co* Ni* Ba* V*
K146A.93 Bedrock 17 93 73 185 115 195
K153A.93 Bedrock 123 106 76 245 29 661
K153B.93 Bedrock 175 111 74 226 29 812
K153C.93 Bedrock 17 113 65 93 201 162
K153E.93 Bedrock 56 121 64 109 87 561
K153F.93 Bedrock 0 28 18 52 210 62
K255.94 Bedrock 16 173 -10 36 -5 35 127
------------------
Sample No. Cr* Rb* Sr* Y* Zr* Nb* Ce* Sc*
K146A.93 429 -5.0 245.0 0.0 17 -5.00 -0.10
K153A.93 615 -5.0 51.0 12.0 29 -5.00 0.62
K153B.93 229 -5.0 29.0 10.0 28 -5.00 0.50
K153C.93 6 6.0 176.0 21.0 41 -5.00 0.25
K153E.93 73 -5.0 51.0 16.0 34 -5.00 0.57
K153F.93 7 7.0 754.0 0.0 11 -5.00 0.35
K255.94 -5 -5.0 300.0 41.0 15 8.00 0.39 50.00

Oxide analyses

( All values are in % )
Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO
K146A.93 Bedrock 46.19 19.11 0.77 12.12 0.14 8.76 8.95
K153A.93 Bedrock 43.98 14.42 2.47 17.51 0.18 7.95 10.69
K153B.93 Bedrock 44.79 13.88 2.75 17.90 0.16 7.71 10.22
K153C.93 Bedrock 46.42 17.12 1.54 12.33 0.14 7.69 9.44
K153E.93 Bedrock 44.18 14.96 3.47 16.75 0.18 6.95 10.43
K153F.93 Bedrock 46.63 26.60 0.23 4.91 0.03 3.42 10.17
K255.94 Bedrock 42.08 13.16 3.91 19.98 0.34 5.18 10.83
------------------
Sample No. Na2O K2O P2O5 Sum
K146A.93 2.53 0.23 0.06 99.00
K153A.93 2.09 0.04 0.07 99.00
K153B.93 2.35 0.03 0.07 100.00
K153C.93 3.48 0.49 0.40 99.00
K153E.93 2.75 0.16 0.08 100.00
K153F.93 4.07 0.60 0.09 97.00
K255.94 1.64 0.05 2.17 99.00


The fact sheet was created on 26.10.2021

Questions or comments regarding the fact sheet can be emailed to:
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