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Drexel Mine, Delaware, Keweenaw Co., Michigan, USAi
Regional Level Types
Drexel MineMine
Delaware- not defined -
Keweenaw Co.County
MichiganState
USACountry

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Key
Latitude & Longitude (WGS84):
47° 25' 22'' North , 88° 6' 50'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Copper Harbor108 (2017)17.7km
Ahmeek146 (2017)25.3km
Copper City187 (2017)25.7km
Laurium1,941 (2017)32.2km
Calumet703 (2017)32.2km


A former Cu occurrence/mine located near Delaware. The Drexel Fissure was worked by the Amygdaloid Mining Company between 1862 and 1874. Very little is known of the mine after this time.

Mineralization is a native copper deposit. Datolite nodules up to five inches across and showing a white color with red speckling throughout can be found in the pile. In the 1940’s, dark purple datolite nodules with a black rim were recovered.

Workings include underground openings comprised of 2 shafts.

Production data: The mine produced a little over 1.5 million pounds of native copper from the Fissure before mining was stopped.

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:

Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Yalmer Primeau Collection
Calcite
Formula: CaCO3
Reference: Yalmer Primeau Collection
Copper
Formula: Cu
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; Rocks & Minerals 84:298-323.
Datolite
Formula: CaB(SiO4)(OH)
Reference: R&M 78:3 p175; Rocks & Minerals 84:298-323.; Rosemeyer, T. 2011 New from the Keweenaw: Part 4 - Recent Mineral Finds in Michigan's Copper Country. Rocks & Minerals 86:205-227
'K Feldspar'
Reference: Yalmer Primeau Collection
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: Yalmer Primeau Collection
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Yalmer Primeau collection
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Yalmer Primeau Collection

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Datolite9.AJ.20CaB(SiO4)(OH)
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Unclassified Minerals, Rocks, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(OH)
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Unclassified Minerals, Mixtures, etc.
'K Feldspar'-
'var: Adularia'-KAlSi3O8

List of minerals for each chemical element

HHydrogen
H DatoliteCaB(SiO4)(OH)
H MalachiteCu2(CO3)(OH)2
H PrehniteCa2Al2Si3O10(OH)2
H AnalcimeNa(AlSi2O6) · H2O
BBoron
B DatoliteCaB(SiO4)(OH)
CCarbon
C MalachiteCu2(CO3)(OH)2
C CalciteCaCO3
OOxygen
O DatoliteCaB(SiO4)(OH)
O MalachiteCu2(CO3)(OH)2
O PrehniteCa2Al2Si3O10(OH)2
O CalciteCaCO3
O AnalcimeNa(AlSi2O6) · H2O
O K Feldspar (var: Adularia)KAlSi3O8
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
AlAluminium
Al PrehniteCa2Al2Si3O10(OH)2
Al AnalcimeNa(AlSi2O6) · H2O
Al K Feldspar (var: Adularia)KAlSi3O8
SiSilicon
Si DatoliteCaB(SiO4)(OH)
Si PrehniteCa2Al2Si3O10(OH)2
Si AnalcimeNa(AlSi2O6) · H2O
Si K Feldspar (var: Adularia)KAlSi3O8
KPotassium
K K Feldspar (var: Adularia)KAlSi3O8
CaCalcium
Ca DatoliteCaB(SiO4)(OH)
Ca PrehniteCa2Al2Si3O10(OH)2
Ca CalciteCaCO3
CuCopper
Cu CopperCu
Cu MalachiteCu2(CO3)(OH)2

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Copper Country Rock & Mineral Club (2001), Red Gold and Tarnished Silver, 2nd edition.
Kaminski-Hamka, T. (2011), The Copper Mines of Keweenaw County, Michigan. Copperlady Press, 150 pp.

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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