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Jensen's Feldspar Quarry, Holt, Tvedestrand, Aust-Agder, Norway

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Name(s) in local language(s):Jensens feltspatbrudd, Holt, Tvedestrand kommune, Aust-Agder fylke, Norge
Latitude & Longitude (WGS84): 58° 36' 25'' North , 8° 51' 50'' East
Latitude & Longitude (decimal): 58.60705,8.86414
GeoHash:G#: u4qm3tndv
Köppen climate type:Dfb : Warm-summer humid continental climate


One of several small quarries west of the Holt Church. Owned by Herm. Jensen, Risør in 1915.

The coordinates are for the quarry in the northwest. Whether this is the one called Jensens Quarry is not known. Maybe they all went under the same name.

Two more at:

58.60699°N 8.86468°Ø
58.60692°N 8.86419°Ø


Coordinates © Kartverket - https://www.kartverket.no

Regions containing this locality

Scandinavia

Region - 2,031 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


6 valid minerals.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
'Apatite'
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
'Biotite'
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
Calcite
Formula: CaCO3
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
'Chlorite Group'
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
'commodity:Feldspar'
Reference: From USGS MRDS database
Hematite
Formula: Fe2O3
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
Microcline
Formula: K(AlSi3O8)
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
Quartz
Formula: SiO2
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
'Scapolite'
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Hematite'4.CB.05Fe2O3
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
'Microcline'9.FA.30K(AlSi3O8)
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Biotite'-
'Chlorite Group'-
Scapolite-
Tourmaline-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Apatite'-
'Biotite'-
'Chlorite Group'-
'Scapolite'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
CCarbon
C CalciteCaCO3
OOxygen
O AlbiteNa(AlSi3O8)
O CalciteCaCO3
O HematiteFe2O3
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O QuartzSiO2
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
NaSodium
Na AlbiteNa(AlSi3O8)
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
AlAluminium
Al AlbiteNa(AlSi3O8)
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
SiSilicon
Si AlbiteNa(AlSi3O8)
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si QuartzSiO2
KPotassium
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
FeIron
Fe HematiteFe2O3

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Proterozoic
541 - 2500 Ma



ID: 3186372
Proterozoic crystalline metamorphic rocks

Age: Proterozoic (541 - 2500 Ma)

Lithology: Granitoid gneiss; orthogneiss/paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Mesoproterozoic
1000 - 1600 Ma



ID: 3131169
Proterozoic II gneiss

Age: Mesoproterozoic (1000 - 1600 Ma)

Description: undifferentiated metamorphic

Lithology: Gneiss

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Schetelig, J. (1916): Skapolit fra syd-norske granitpegmatitganger. Norsk Geologisk tidsskrift. 3, 1-20


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