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Frenswegen 3 deep bore, Frenswegen, Nordhorn, County of Bentheim District, Lower Saxony, Germanyi
Regional Level Types
Frenswegen 3 deep bore- not defined -
FrenswegenVillage
NordhornMunicipality
County of Bentheim DistrictDistrict
Lower SaxonyState
GermanyCountry

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Latitude & Longitude (WGS84):
52° North , 7° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~1km
GRN:
N35E04
Köppen climate type:
Cfb : Temperate oceanic climate
Mindat Locality ID:
1810
Long-form identifier:
mindat:1:2:1810:7
GUID (UUID V4):
fa4cc1dc-e2b0-4a7c-9be9-65153b7ba40a
Other Languages:
German:
Tiefbohrung Frenswegen 3, Frenswegen, Nordhorn, Grafschaft Bentheim, Niedersachsen, Deutschland


A borehole driven for natural gas prospection. Below the methane-bearing dolomite, at a depth of 1924.8 m, the bore passed into rocks of the Zechstein formation, consisting of thin layers of conglomerate and limestone deposited above a thick (238 m) layer of anhydrite. Heidornite was discovered in a cleft in the upper part of the anhydrite layer, at a depth of 1968 m.
Located NW of Nordhorn.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


14 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Anhydrite
Formula: CaSO4
ⓘ Calcite
Formula: CaCO3
ⓘ Celestine
Formula: SrSO4
ⓘ 'Chlorite Group'
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ 'Feldspar Group'
ⓘ Glauberite
Formula: Na2Ca(SO4)2
ⓘ Halite
Formula: NaCl
ⓘ Heidornite (TL)
Formula: Na2Ca3B5O8(SO4)2Cl(OH)2
Type Locality:
ⓘ Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘ Polyhalite
Formula: K2Ca2Mg(SO4)4 · 2H2O
ⓘ Sulphur
Formula: S8
ⓘ Tachyhydrite
Formula: CaMg2Cl6 · 12H2O
ⓘ Talc ?
Formula: Mg3Si4O10(OH)2
Description: Authors report a "talc-like serpentine group mineral". The powder XRD corresponds to that of talc.

Gallery:

Na2Ca3B5O8(SO4)2Cl(OH)2ⓘ Heidornite (TL)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘSulphur1.CC.05S8
Group 3 - Halides
ⓘHalite3.AA.20NaCl
ⓘTachyhydrite3.BB.35CaMg2Cl6 · 12H2O
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘDolomite5.AB.10CaMg(CO3)2
Group 6 - Borates
ⓘHeidornite (TL)6.EC.30Na2Ca3B5O8(SO4)2Cl(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGlauberite7.AD.25Na2Ca(SO4)2
ⓘAnhydrite7.AD.30CaSO4
ⓘCelestine7.AD.35SrSO4
ⓘPolyhalite7.CC.65K2Ca2Mg(SO4)4 · 2H2O
Group 9 - Silicates
ⓘTalc ?9.EC.05Mg3Si4O10(OH)2
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Illite9.EC.15K0.65Al2.0[Al0.65Si3.35O10](OH)2
ⓘMontmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Feldspar Group'-
ⓘ'Chlorite Group'-

List of minerals for each chemical element

HHydrogen
Hⓘ HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
Hⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Hⓘ PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
Hⓘ TachyhydriteCaMg2Cl6 · 12H2O
Hⓘ TalcMg3Si4O10(OH)2
BBoron
Bⓘ HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
CCarbon
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AnhydriteCaSO4
Oⓘ CalciteCaCO3
Oⓘ CelestineSrSO4
Oⓘ DolomiteCaMg(CO3)2
Oⓘ GlauberiteNa2Ca(SO4)2
Oⓘ HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
Oⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Oⓘ PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
Oⓘ TachyhydriteCaMg2Cl6 · 12H2O
Oⓘ TalcMg3Si4O10(OH)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ GlauberiteNa2Ca(SO4)2
Naⓘ HaliteNaCl
Naⓘ HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
Naⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
MgMagnesium
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Mgⓘ PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
Mgⓘ TachyhydriteCaMg2Cl6 · 12H2O
Mgⓘ TalcMg3Si4O10(OH)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Siⓘ TalcMg3Si4O10(OH)2
SSulfur
Sⓘ AnhydriteCaSO4
Sⓘ CelestineSrSO4
Sⓘ GlauberiteNa2Ca(SO4)2
Sⓘ HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
Sⓘ PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
Sⓘ SulphurS8
ClChlorine
Clⓘ HaliteNaCl
Clⓘ HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
Clⓘ TachyhydriteCaMg2Cl6 · 12H2O
KPotassium
Kⓘ Muscovite var. IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
CaCalcium
Caⓘ AnhydriteCaSO4
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
Caⓘ GlauberiteNa2Ca(SO4)2
Caⓘ HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
Caⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Caⓘ PolyhaliteK2Ca2Mg(SO4)4 · 2H2O
Caⓘ TachyhydriteCaMg2Cl6 · 12H2O
SrStrontium
Srⓘ CelestineSrSO4

Other Regions, Features and Areas containing this locality

Eurasian PlateTectonic Plate
EuropeContinent

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References

von Engelhardt, W., Füchtbauer, H., and Zemann, J. (1956): Heidornit Na2Ca3[Cl · (SO4)2 · B5O8(OH)2] ein neues Bormineral aus dem Zechsteinanhydrit - Mit einer röntgenographischen Untersuchung. Contributions to Mineralogy and Petrology 5(3), 177-186 (in German).
Füchtbauer, H., and Goldschmidt, H. (1956): Ein Zechsteinanhydrit-Profil mit Einlagerungen von Montmorillonit und einer abweichenden Serpentinvarietät. Contributions to Mineralogy and Petrology 5(3), 187-203 (in German).
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