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Crown Mine (Nichols Prospect; Hammer; Upper Hammon No. 38?), Illinois River District, Josephine Co., Oregon, USAi
Regional Level Types
Crown Mine (Nichols Prospect; Hammer; Upper Hammon No. 38?)Mine
Illinois River DistrictMining District
Josephine Co.County
OregonState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84):
42° 19' 44'' North , 123° 45' 40'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Selma695 (2011)13.2km
Kerby595 (2011)17.5km
Cave Junction1,932 (2017)20.7km
O'Brien504 (2011)29.5km
Redwood2,627 (2011)32.4km


REF:Deposit:: RAMP, LEN, 1961, CHROMITE IN SOUTHWESTERN OREGON: OREGON DEPT. GEOLOGY AND MINERAL IND. BULL. 52, 169 P. 37
Deposit:: OR. DEPT. GEOL. AND MIN. INDUST. BULLETIN 100, 1979,
Deposit:: PLATE 2, NO. 258.
Deposit:: THAYER, T. P., 1974, UNPUBL. DATA
Deposit:: RAMP, L. AND PETERSON, N.V., 1979, GEOLOGY AND MINERAL RESOURCES OF JOSEPHINE COUN
Commodities (Major) - Copper, Chromium
Development Status: Past Producer
Host Rock: Dunite, Serpentinite

Regions containing this locality

Pacific OceanOcean
North America PlateTectonic Plate

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.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Antigorite
Formula: Mg3(Si2O5)(OH)4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Calcite
Formula: CaCO3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Chromite
Formula: Fe2+Cr3+2O4
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Talc
Formula: Mg3Si4O10(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
Antigorite9.ED.15Mg3(Si2O5)(OH)4
Talc9.EC.05Mg3Si4O10(OH)2

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
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 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Antigorite71.1.2a.1Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Talc71.2.1.3Mg3Si4O10(OH)2

List of minerals for each chemical element

HHydrogen
H MalachiteCu2(CO3)(OH)2
H TalcMg3Si4O10(OH)2
H AntigoriteMg3(Si2O5)(OH)4
CCarbon
C MalachiteCu2(CO3)(OH)2
C CalciteCaCO3
OOxygen
O ChromiteFe2+Cr23+O4
O MalachiteCu2(CO3)(OH)2
O TalcMg3Si4O10(OH)2
O CalciteCaCO3
O AntigoriteMg3(Si2O5)(OH)4
MgMagnesium
Mg TalcMg3Si4O10(OH)2
Mg AntigoriteMg3(Si2O5)(OH)4
SiSilicon
Si TalcMg3Si4O10(OH)2
Si AntigoriteMg3(Si2O5)(OH)4
SSulfur
S ChalcopyriteCuFeS2
CaCalcium
Ca CalciteCaCO3
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe ChromiteFe2+Cr23+O4
Fe ChalcopyriteCuFeS2
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Jurassic
145 - 201.3 Ma



ID: 1473757
Western Klamath Terrane; Smith River Subterrane; Josephine Ophiolite

Age: Jurassic (145 - 201.3 Ma)

Description: Josephine Ophiolite, peridotite; ultramafic rocks; ultramafic composition lithologies; mixed lithologies; deformed

Lithology: Major:: {harzburgite}; Major:: {peridotite}; Major:: {chromite, mineralization: chromite}; Major:: {dunite}

Reference: R.L. Smith, W.P. Roe (compilers). Oregon Geologic Data Compilation, release 6. State of Oregon Department of Geology and Mineral Industries. [20]

Jurassic - Paleozoic
145 - 541 Ma



ID: 3013144
Ultramafic and related rocks of ophiolite sequences

Age: Phanerozoic (145 - 541 Ma)

Description: Predominantly harzburgite and dunite with both cumulate and tectonite fabrics. Locally altered to serpentinite. Includes gabbroic rocks and sheeted diabasic dike complexes. Comprises Josephine ophiolite of Harper (1980), ophiolites of Onion Mountain, Sexton Mountain, Pearsoll Peak, Rogue River, and Riddle areas (Smith and others, 1982) and Coast Range ophiolite and serpentinite melange of M.C. Blake, Jr. and A.S. Jayko (unpublished data, 1985). In southwest Oregon, locally includes small bodies of early Mesozoic or late Paleozoic serpentinized and sheared ultramafic rocks, mostly in shear zones. Locally, volcanic and sedimentary rocks shown separately

Comments: Original map source: Miller, R.J., Raines, G.L., and Connors, K.A., 2002, Spatial digital database for the geologic map of Oregon: Geology compiled by G.W. Walker and N.S. MacLeod, USGS Open-File Report 03-67, scale 1:500,000.

Lithology: Major:{peridotite,serpentinite}, Minor:{gabbro,diorite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Jurassic - Triassic
145 - 251.902 Ma



ID: 3189349
Mesozoic sedimentary and volcanic rocks

Age: Mesozoic (145 - 251.902 Ma)

Lithology: Mafic volcanic rocks; shale

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

USGS MRDS Record:10033218
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