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Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway i
Regional Level Types
Brekke Tunnel Tunnel
Helland Farm
Holmestrand Municipality
Vestfold County
Norway Country

Regional Level Types
Brekke Tunnel	Tunnel
Helland	Farm
Holmestrand	Municipality
Vestfold	County
Norway	Country

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Brekke Tunnel, southern entrance

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Calcite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Epidote, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Brekke Tunnel, southern entrance

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Calcite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Epidote, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Brekke Tunnel, southern entrance

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Calcite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Latitude & Longitude (WGS84):

59° 27' 34'' North , 10° 20' 35'' East

Latitude & Longitude (decimal):

Type:

Köppen climate type:

Cfb : Temperate oceanic climate

Nearest Settlements:

Place	Population	Distance
Holmestrand	6,135 (2018)	3.4km
Nykirke	662 (2014)	4.7km
Gullhaug	1,912 (2018)	6.9km
Skoppum	1,633 (2013)	9.0km
Horten	17,660 (2017)	9.2km

Nearest Clubs:
Local clubs are the best way to get access to collecting localities

Club	Location	Distance
Vestfold Geologiforening	Holmestrand	4km
Follo Geologiforening	Ås	36km
Buskerud Geologiforening	Solbergelva	37km
Fredrikstad og Omegn Geologiforening	Kråkerøy	46km

Mindat Locality ID:

32657

Long-form identifier:

mindat:1:2:32657:6

GUID (UUID V4):

Other/historical names associated with this locality:

Brekkekleiv; Valtersborg; Watersborg

Other Languages:

Norwegian:

Brekketunnelen, Helland, Holmestrand, Vestfold, Norge

Amygdales in basalt (B1) exposed during road and tunnel construction (new alignment of E 18) in 1997-2000. Locality no longer accessible (heavy traffic!). The minerals listed here were found both in the very tunnel and the area north of the tunnel (including the areas called "dagsone nord" ["Dayzone North"] and Brekkekleiva (spelled erronously as Brattekleiv by Garmo (2000)).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

13 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ Basalt

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Andersen, Frode, Bergstrøm, Trond, Larsen, Alf Olav, Larsen, Stig, Nordrum, Fred Steinar (2000) Mineralfunn langs ny veitrasé for E-18 i Nordre Vestfold, del 2. STEIN. Magasin for populærgeologi, 27 (3) 4-15

Nordrum, Fred Steinar, Larsen, Stig, Bergstrøm, Trond Owe, Larsen, Alf Olav (2000) Mineralfunn langs ny vegtrasé for E-18 i Nordre Vestfold. Del 2: Strekningen fra Kjeksrød i Holmestrand til Kopstad i Våle [Mineral discoveries along the new road route for E-18 in Nordre Vestfold. Part 2: The stretch from Kjeksrød in Holmestrand to Kopstad in Våle], in Kongsberg Mineralsymposium 2000. Norsk Bergverksmuseum Skrift, 17. 26-31

ⓘ Calcite

Formula: CaCO₃

References:

ⓘ Chrysocolla

Formula: Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1

References:

ⓘ Cuprite

Formula: Cu₂O

References:

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

References:

ⓘ Fluorite

Formula: CaF₂

References:

ⓘ Heulandite-Ca

Formula: (Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O

Description: a strontian heulandite-Ca

References:

Nordrum, F. S.

Nordrum, Fred Steinar, Larsen, Alf Olav, Erambert, Muriel (2003) Minerals of the heulandite series in Norway - a progress report. Norsk Bergverksmuseum Skrift, 25. 51-62

Nordrum, Fred Steinar, Larsen, Alf Olav, Erambert, Muriel (2005) Minerals of the heulandite series in Norway- additional data and summary. Norsk Bergverksmuseum Skrift, 30. 98-112

ⓘ Laumontite

Formula: CaAl₂Si₄O₁₂ · 4H₂O

References:

ⓘ Malachite

Formula: Cu₂(CO₃)(OH)₂

References:

ⓘ Native Copper

Formula: Cu

References:

ⓘ Prehnite

Formula: Ca₂Al₂Si₃O₁₀(OH)₂

References:

ⓘ Pyrite

Formula: FeS₂

References:

ⓘ Quartz

Formula: SiO₂

References:

ⓘ Quartz var. Amethyst

Formula: SiO₂

References:

Gallery:

Cu₂Oⓘ Cuprite

Cuprite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Cuprite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Cuprite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂Oⓘ Heulandite-Ca

Heulandite-Ca, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Heulandite-Ca, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Heulandite-Ca, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Heulandite-Ca, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Heulandite-Ca, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Heulandite-Ca, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Heulandite-Ca, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Heulandite-Ca, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Ca₂Al₂Si₃O₁₀(OH)₂ⓘ Prehnite

Prehnite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Prehnite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

Prehnite, etc.

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Copper	1.AA.05	Cu
Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 3 - Halides
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	Cuprite	4.AA.10	Cu₂O
ⓘ	Quartz var. Amethyst	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂
Group 9 - Silicates
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Prehnite	9.DP.20	Ca₂Al₂Si₃O₁₀(OH)₂
ⓘ	Chrysocolla	9.ED.20	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Laumontite	9.GB.10	CaAl₂Si₄O₁₂ · 4H₂O
ⓘ	Heulandite-Ca	9.GE.05	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
H	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
H	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Quartz var. Amethyst	SiO₂
O	ⓘ Calcite	CaCO₃
O	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
O	ⓘ Cuprite	Cu₂O
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
F	Fluorine
F	ⓘ Fluorite	CaF₂
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Al	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Al	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Quartz var. Amethyst	SiO₂
Si	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Si	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
S	Sulfur
S	ⓘ Pyrite	FeS₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Ca	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Ca	ⓘ Heulandite-Ca	(Ca,Na)₅(Si₂₇Al₉)O₇₂ · 26H₂O
Fe	Iron
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Pyrite	FeS₂
Cu	Copper
Cu	ⓘ Chrysocolla	Cu_2-xAl_x(H_2-xSi₂O₅)(OH)₄ · nH₂O, x < 1
Cu	ⓘ Cuprite	Cu₂O
Cu	ⓘ Native Copper	Cu
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate

Baltic Shield
- Sveconorwegian BeltShield

EuropeContinent

Norway

Oslo Volcanic ProvinceVolcanic Province
Vestfold
- ⭔ReMunicipality
⭔Vestfold og Telemark (2020-2023)County

ScandinaviaRegion

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Garmo, Torgeir T. (2000) Neue Mineralienfunde in Norwegen 1999 [New Mineral Discoveries in Norway 1999]. Mineralien Welt, 11 (4). 61-64locality erronously named as Brattekleiv

Nordrum, Fred Steinar, Larsen, Alf Olav, Erambert, Muriel (2003) Minerals of the heulandite series in Norway - a progress report. Norsk Bergverksmuseum Skrift, 25. 51-62

Larsen, Knut Edvard, Larsen, Stig (2005) Mineralforekomster på Vestfold lavaplatå. Del 2: I B1-nivåets basalter [Mineral localities in the Vestfold lava plateau. Part II: In the B1 basalts]. Norsk Bergverksmuseum Skrift, 30. 41-57

Nordrum, Fred Steinar, Larsen, Alf Olav, Erambert, Muriel (2005) Minerals of the heulandite series in Norway- additional data and summary. Norsk Bergverksmuseum Skrift, 30. 98-112 with analysis of heulandite-Ca from Valtersborg = Brekke Tunnel

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Brekke Tunnel, Helland, Holmestrand, Vestfold, NorwayiRegional Level TypesBrekke TunnelTunnel HellandFarm HolmestrandMunicipality VestfoldCounty NorwayCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

Select Mineral List Type

Mineral List

Rock Types Recorded

Select Rock List Type

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

Brekke Tunnel, Helland, Holmestrand, Vestfold, Norway i
Regional Level Types
Brekke Tunnel Tunnel
Helland Farm
Holmestrand Municipality
Vestfold County
Norway Country