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Case Coal mine, Portsmouth, Newport County, Rhode Island, USAi
Regional Level Types
Case Coal mineMine
PortsmouthTown
Newport CountyCounty
Rhode IslandState
USACountry

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Latitude & Longitude (WGS84):
41° North , 71° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~2km
GRN:
N28W39
Type:
Mine
Köppen climate type:
Cfa : Humid subtropical climate
Mindat Locality ID:
6837
Long-form identifier:
mindat:1:2:6837:9
GUID (UUID V4):
ff7692ee-e2ec-478d-ae26-44dc3ee0eb40
Other/historical names associated with this locality:
Mount Hope Coal mine


On the east side of Butts Hill.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


7 valid minerals.

Detailed Mineral List:

ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Graphite
Formula: C
ⓘ Hematite
Formula: Fe2O3
ⓘ Ottrélite ?
Formula: (Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Description: Fisher, L.W. and Doll, C.G. (1927) Notes on the mineral localities of Rhode Island. American Mineralogist, 12, 427-436. This reference is unreliable, because there are no chemical analyses known for Rhode Island Ottrélite. This reference has been widely used to support the sight identification.
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2
ⓘ Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGraphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘOttrélite ?9.AF.85(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
ⓘTremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8

List of minerals for each chemical element

HHydrogen
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Hⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
CCarbon
Cⓘ GraphiteC
OOxygen
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ HematiteFe2O3
Oⓘ Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Oⓘ QuartzSiO2
Oⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
MgMagnesium
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Mgⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
AlAluminium
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
SiSilicon
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Siⓘ QuartzSiO2
Siⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
SSulfur
Sⓘ PyriteFeS2
CaCalcium
Caⓘ Tremolite◻Ca2Mg5(Si8O22)(OH)2
MnManganese
Mnⓘ Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
FeIron
Feⓘ HematiteFe2O3
Feⓘ Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Feⓘ PyriteFeS2

Other Regions, Features and Areas containing this locality

Atlantic OceanOcean
North America PlateTectonic Plate

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

Ashley, G.H. (1915) Rhode Island Coal, Washington, D.C. USGS Bulletin 615
Miller, C. E. (1971) "Rhode Island Minerals and Their Locations," University of Rhode Island, Kingston.
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