Sheahan Quarry, Graniteville, Iron County, Missouri, USAi
Regional Level Types | |
---|---|
Sheahan Quarry | Quarry |
Graniteville | Village |
Iron County | County |
Missouri | State |
USA | Country |
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Latitude & Longitude (WGS84):
37° 40' 8'' North , 90° 40' 56'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Iron Mountain Lake | 717 (2017) | 5.9km |
Pilot Knob | 713 (2017) | 6.5km |
Ironton | 1,392 (2017) | 9.3km |
Arcadia | 575 (2017) | 10.1km |
Bismarck | 1,500 (2017) | 12.2km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
Club | Location | Distance |
---|---|---|
Mineral Area Gem & Mineral Society | Park Hills, Missouri | 24km |
Mindat Locality ID:
28470
Long-form identifier:
mindat:1:2:28470:2
GUID (UUID V4):
4bb20ded-7901-43af-8945-a8bcbcee796a
Other/historical names associated with this locality:
Sheahan Granite Quarry
A granite-pegmatite-Sn occurrrence/quarry. Discovered and first produced in 1888. The owner-operator was the Heyward Granite Company (100%), Missouri (1976). The USGS MRDS database stated accuracy for this locality is 10 meters.
The "ore body" strikes N65E and dips 60N at a width of 0.5 meter and a length of 3 meters and with a depth-to-top of 0 meters. It is a pegmatite. The primary mode of origin was magmatic differentiation and the secondary mode was hydrothermal activity. Primary ore control is unknown. The degree of wallrock alteration is unknown (sericitic). Local rocks include rocks of the St. Francois Mountains Volcanic Supergroup.
Graniteville, Iron County, Missouri, has been for some time the most important granite quarrying center in the state. The Sheahan quarry located just north of Graniteville village is at present the most active one in the district. The quarry product is the distinctive "Missouri red granite” of pre-Cambrian age. The granite, a pegmatite, and replacement veins exposed in the quarry afforded material for a petrographic and chemical study presented in this paper.
Feldspar and quartz make up 96 to 97 per cent of the granite. The feldspar includes two generations of albite, orthoclase and microcline. Both orthoclase and microcline are intergrown with albite, forming several types of perthite. Microcline-albite intergrowths are usually of the type described by Andersen as "vein" perthite. The orthoclase-albite intergrowths are much less regular and are of the “patch” type. A third perthitic development is "poikilitic"; allotriomorphic to hypidiomorphic crystals of albite are included in larger crystals of vein and patch perthite. The earliest feldspar of the granite is an albite near oligoclase which occurs in crystals up to an inch or more in length. Albite also appears to be the last feldspar, a second generation of this mineral occurring in small unaltered grains interstitial to the Larger minerals and sometimes as a “blocky” fringe bordering earlier feldspar (Fig. 1). Other minerals, some of which are secondary products, include apatite, biotite, calcite, chlorite, fluorite, hematite, leucoxene, magnetite, muscovite, pyrite, sericite, and zircon. Apatite is very rare, and only a {ew scattered crystals were noted. Biotite is not common and has been largely altered to "green-biotite" and chlorite. A few grains of zircon with characteristic haloes are found as inclusions in the biotite
Magnetite is of interest because it occurs both as an early and as a late mineral. In the second occurrence it is usually associated with muscovite which replaces feldspar and to a lesser extent quartz. It is possible that the muscovite is deuteric and was derived from an earlier iron-bearing mineral such as biotite by the action of late magmatic juices. Such a reaction might produce mica more closely allied to muscovite at the same time liberating iron which became fixed as magnetite. The muscovite is colorless or has a faint olive-green to colorless absorption. It is probably a closely related if not the same mica which occurs abundantly in the pegmatite and veins.
Although pyrite was not observed in thin sections prepared from chips taken from the material used for chemical analysis, this mineral is present in the granite near joint planes. The chlorite apparently derived from biotite is blue-green in color and is characterized by blue-grey interference colors. 2V is small and negative, and the mineral is probably negative-penninite or delessite.
MINERALOGY:
Most of the pegmatite in the outcrop is composed of feldspar and quartz. Topaz, mica, fluorite, and a few other minerals are present, but of special interest is beryl, a mineral hitherto not described in any Missouri occurrence.
BERYL: Massive beryl is common, but there is a greater tendency for this mineral to develop crystal forms than is true of the topaz. Hexagonal prisms two inches in length were found. The beryl varies from colorless or a faint blue to a fine aquamarine color, but none is of good gem quality.
TOPAZ: The topaz is colorless or light yellow with a vitreous luster. It occurs in coarsely granular aggregates, and crystal faces are rare. Topaz is always in close association with beryl and muscovite, and replacement by these minerals and by albite is so general that the original relationships of the topaz could not be determined. Topaz is considered to be the earliest hydrothermal mineral.
Feldspar and quartz make up 96 to 97 per cent of the granite. The feldspar includes two generations of albite, orthoclase and microcline. Both orthoclase and microcline are intergrown with albite, forming several types of perthite. Microcline-albite intergrowths are usually of the type described by Andersen as "vein" perthite. The orthoclase-albite intergrowths are much less regular and are of the “patch” type. A third perthitic development is "poikilitic"; allotriomorphic to hypidiomorphic crystals of albite are included in larger crystals of vein and patch perthite. The earliest feldspar of the granite is an albite near oligoclase which occurs in crystals up to an inch or more in length. Albite also appears to be the last feldspar, a second generation of this mineral occurring in small unaltered grains interstitial to the Larger minerals and sometimes as a “blocky” fringe bordering earlier feldspar (Fig. 1). Other minerals, some of which are secondary products, include apatite, biotite, calcite, chlorite, fluorite, hematite, leucoxene, magnetite, muscovite, pyrite, sericite, and zircon. Apatite is very rare, and only a {ew scattered crystals were noted. Biotite is not common and has been largely altered to "green-biotite" and chlorite. A few grains of zircon with characteristic haloes are found as inclusions in the biotite
Magnetite is of interest because it occurs both as an early and as a late mineral. In the second occurrence it is usually associated with muscovite which replaces feldspar and to a lesser extent quartz. It is possible that the muscovite is deuteric and was derived from an earlier iron-bearing mineral such as biotite by the action of late magmatic juices. Such a reaction might produce mica more closely allied to muscovite at the same time liberating iron which became fixed as magnetite. The muscovite is colorless or has a faint olive-green to colorless absorption. It is probably a closely related if not the same mica which occurs abundantly in the pegmatite and veins.
Although pyrite was not observed in thin sections prepared from chips taken from the material used for chemical analysis, this mineral is present in the granite near joint planes. The chlorite apparently derived from biotite is blue-green in color and is characterized by blue-grey interference colors. 2V is small and negative, and the mineral is probably negative-penninite or delessite.
MINERALOGY:
Most of the pegmatite in the outcrop is composed of feldspar and quartz. Topaz, mica, fluorite, and a few other minerals are present, but of special interest is beryl, a mineral hitherto not described in any Missouri occurrence.
BERYL: Massive beryl is common, but there is a greater tendency for this mineral to develop crystal forms than is true of the topaz. Hexagonal prisms two inches in length were found. The beryl varies from colorless or a faint blue to a fine aquamarine color, but none is of good gem quality.
TOPAZ: The topaz is colorless or light yellow with a vitreous luster. It occurs in coarsely granular aggregates, and crystal faces are rare. Topaz is always in close association with beryl and muscovite, and replacement by these minerals and by albite is so general that the original relationships of the topaz could not be determined. Topaz is considered to be the earliest hydrothermal mineral.
Vugs of terminated quartz can be found with thuringite in the replacement veins.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
19 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 DiagramDetailed Mineral List:
ⓘ Albite Formula: Na(AlSi3O8) References: |
ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) References: |
ⓘ Beryl Formula: Be3Al2(Si6O18) |
ⓘ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 References: |
ⓘ Calcite Formula: CaCO3 References: |
ⓘ Cassiterite Formula: SnO2 |
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ 'Chlorite Group' References: |
ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) References: |
ⓘ 'Feldspar Group' |
ⓘ Fluorite Formula: CaF2 |
ⓘ Galena Formula: PbS References: |
ⓘ Hematite Formula: Fe2O3 References: |
ⓘ Magnetite Formula: Fe2+Fe3+2O4 References: |
ⓘ 'Mica Group' |
ⓘ Microcline Formula: K(AlSi3O8) References: |
ⓘ Molybdenite Formula: MoS2 References: |
ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
ⓘ Orthoclase Formula: K(AlSi3O8) References: |
ⓘ Pyrite Formula: FeS2 References: |
ⓘ Quartz Formula: SiO2 |
ⓘ Quartz var. Smoky Quartz Formula: SiO2 References: |
ⓘ Rutile Formula: TiO2 |
ⓘ Topaz Formula: Al2(SiO4)(F,OH)2 |
ⓘ Zircon Formula: Zr(SiO4) References: |
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Galena | 2.CD.10 | PbS |
ⓘ | Molybdenite | 2.EA.30 | MoS2 |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 3 - Halides | |||
ⓘ | Fluorite | 3.AB.25 | CaF2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
ⓘ | Hematite | 4.CB.05 | Fe2O3 |
ⓘ | Quartz var. Smoky Quartz | 4.DA.05 | SiO2 |
ⓘ | 4.DA.05 | SiO2 | |
ⓘ | Rutile | 4.DB.05 | TiO2 |
ⓘ | Cassiterite | 4.DB.05 | SnO2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Calcite | 5.AB.05 | CaCO3 |
Group 9 - Silicates | |||
ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
ⓘ | Topaz | 9.AF.35 | Al2(SiO4)(F,OH)2 |
ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
ⓘ | Beryl | 9.CJ.05 | Be3Al2(Si6O18) |
ⓘ | Muscovite var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
ⓘ | 9.EC.15 | KAl2(AlSi3O10)(OH)2 | |
ⓘ | Orthoclase | 9.FA.30 | K(AlSi3O8) |
ⓘ | Microcline | 9.FA.30 | K(AlSi3O8) |
ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
Unclassified | |||
ⓘ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
ⓘ | 'Feldspar Group' | - | |
ⓘ | 'Mica Group' | - | |
ⓘ | 'Chlorite Group' | - | |
ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
H | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
Be | Beryllium | |
Be | ⓘ Beryl | Be3Al2(Si6O18) |
C | Carbon | |
C | ⓘ Calcite | CaCO3 |
O | Oxygen | |
O | ⓘ Albite | Na(AlSi3O8) |
O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
O | ⓘ Beryl | Be3Al2(Si6O18) |
O | ⓘ Calcite | CaCO3 |
O | ⓘ Cassiterite | SnO2 |
O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
O | ⓘ Hematite | Fe2O3 |
O | ⓘ Magnetite | Fe2+Fe23+O4 |
O | ⓘ Microcline | K(AlSi3O8) |
O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
O | ⓘ Orthoclase | K(AlSi3O8) |
O | ⓘ Quartz | SiO2 |
O | ⓘ Rutile | TiO2 |
O | ⓘ Quartz var. Smoky Quartz | SiO2 |
O | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
O | ⓘ Zircon | Zr(SiO4) |
O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
F | Fluorine | |
F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
F | ⓘ Fluorite | CaF2 |
F | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
Na | Sodium | |
Na | ⓘ Albite | Na(AlSi3O8) |
Mg | Magnesium | |
Mg | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Al | Aluminium | |
Al | ⓘ Albite | Na(AlSi3O8) |
Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Al | ⓘ Beryl | Be3Al2(Si6O18) |
Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Al | ⓘ Microcline | K(AlSi3O8) |
Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | ⓘ Orthoclase | K(AlSi3O8) |
Al | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Si | Silicon | |
Si | ⓘ Albite | Na(AlSi3O8) |
Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Si | ⓘ Beryl | Be3Al2(Si6O18) |
Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | ⓘ Microcline | K(AlSi3O8) |
Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | ⓘ Orthoclase | K(AlSi3O8) |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Quartz var. Smoky Quartz | SiO2 |
Si | ⓘ Topaz | Al2(SiO4)(F,OH)2 |
Si | ⓘ Zircon | Zr(SiO4) |
Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
P | Phosphorus | |
P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Galena | PbS |
S | ⓘ Molybdenite | MoS2 |
S | ⓘ Pyrite | FeS2 |
Cl | Chlorine | |
Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
K | Potassium | |
K | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
K | ⓘ Microcline | K(AlSi3O8) |
K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
K | ⓘ Orthoclase | K(AlSi3O8) |
K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Ca | Calcium | |
Ca | ⓘ Calcite | CaCO3 |
Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Ca | ⓘ Fluorite | CaF2 |
Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
Ti | Titanium | |
Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Ti | ⓘ Rutile | TiO2 |
Fe | Iron | |
Fe | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | ⓘ Hematite | Fe2O3 |
Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Fe | ⓘ Pyrite | FeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Zr | Zirconium | |
Zr | ⓘ Zircon | Zr(SiO4) |
Mo | Molybdenum | |
Mo | ⓘ Molybdenite | MoS2 |
Sn | Tin | |
Sn | ⓘ Cassiterite | SnO2 |
Pb | Lead | |
Pb | ⓘ Galena | PbS |
Other Databases
Link to USGS MRDS: | 10195882 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Shawnee DomainDomain
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