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Spearfish, Trojan Mining District, Lawrence County, South Dakota, USA i
Regional Level Types
Spearfish - not defined -
Trojan Mining District Mining District
Lawrence County County
South Dakota State
USA Country

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Latitude & Longitude (WGS84):

44° 29' 26'' North , 103° 51' 33'' West

Latitude & Longitude (decimal):

44.49082,-103.85937

G#: 9xyjhe7cv

Köppen climate type:

Dfb : Warm-summer humid continental climate

Nearest Settlements:

Place	Population	Distance
Spearfish	11,283 (2017)	0.0km
North Spearfish	2,285 (2017)	3.1km
Saint Onge	191 (2017)	12.6km
Central City	130 (2017)	15.5km
Deadwood	1,258 (2017)	16.3km

Mindat Locality ID:

277236

Long-form identifier:

mindat:1:2:277236:6

GUID (UUID V4):

0

No description has been added for this locality. Can you add one?

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

ⓘ Native Gold

ⓘ Native Silver

3 valid minerals.

Detailed Mineral List:

ⓘ Native Gold

Formula: Au

Locality: Old Ironsides Mine (Colorado-Deadwood Mine), Spearfish, Trojan Mining District, Lawrence County, South Dakota, USA

References:

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Native Silver

Formula: Ag

Locality: Old Ironsides Mine (Colorado-Deadwood Mine), Spearfish, Trojan Mining District, Lawrence County, South Dakota, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

Formula: AgAuTe₄

Locality: Old Ironsides Mine (Colorado-Deadwood Mine), Spearfish, Trojan Mining District, Lawrence County, South Dakota, USA

References:

Rocks & Min.: 60: 111.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Gold	1.AA.05	Au
ⓘ	Native Silver	1.AA.05	Ag
Group 2 - Sulphides and Sulfosalts
ⓘ	Sylvanite	2.EA.05	AgAuTe₄

List of minerals for each chemical element

Ag	Silver
Ag	ⓘ Native Silver	Ag
Ag	ⓘ Sylvanite	AgAuTe₄
Te	Tellurium
Te	ⓘ Sylvanite	AgAuTe₄
Au	Gold
Au	ⓘ Native Gold	Au
Au	ⓘ Sylvanite	AgAuTe₄

Localities in this Region

South Dakota
- Lawrence County
  - Trojan Mining District
    - Spearfish
      - Old Ironsides Mine (Colorado-Deadwood Mine)

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Wyoming CratonCraton
Wyoming DomainDomain

USA

Black HillsMountain Range

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.

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