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Cummingtonite from
Caprock prospect, Pearl Mining District, Jackson County, Colorado, USA


Locality type:Prospect
Classification
Species:Cummingtonite
Formula:◻Mg2Mg5(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cummingtonite data
Locality Data:Click here to view Caprock prospect, Pearl Mining District, Jackson County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:437282
Long-form Identifier:1:3:437282:0
GUID (UUID V4):0
Nearest other occurrences of Cummingtonite
31.9km (19.8 miles) ⓘDouglas Mine (Morning Star claims 1868 & 1871; Douglas Gold and Copper Company), Keystone Mining District - Douglas Creek Mining District, Medicine Bow Mountains, Albany County, Wyoming, USA
85.3km (53.0 miles) ⓘCopper King Mine (Claims: Black Hawk No. 1; Black Hawk No. 2), Prairie Divide Mining District (St. Cloud Mining District), Larimer County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
Spry, Paul G.; McFadden, Scott; Teale, Graham S.; Alers, Brian; Shallow, John M.; Glenn, Justin M. (2022) Nodular sillimanite rocks as field indicators to metamorphosed massive sulfide deposits. Ore Geology Reviews, 141. 104632 doi:10.1016/j.oregeorev.2021.104632
Berke, Edward H., Spry, Paul G., Heimann, Adriana, Teale, Graham S., Johnson, Benjamin, von der Handt, Anette, Alers, Brian, Shallow, John M. (2023) The genesis of metamorphosed Paleoproterozoic massive sulphide occurrences in central Colorado: geological, mineralogical and sulphur isotope constraints. Geological Magazine, 160 (7) 1345-1375 doi:10.1017/s0016756823000407
 
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