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Microcline from
Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA


Locality type:Mine
Classification
Species:Microcline
Formula:K(AlSi3O8)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Cotopaxi Mine (Cotopaxi lode; Gumaer Mine; Fannie lode; Fannie Mill), Mine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:34972
Long-form Identifier:1:3:34972:3
GUID (UUID V4):0
Nearest other occurrences of Microcline
0.2km (0.2 miles) ⓘMine Gulch, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
1.7km (1.1 miles) ⓘUnnamed No. 2 Pegmatite Occurrence (MRDS - 10010898), Cotopaxi Mining District, Fremont County, Colorado, USA
3.8km (2.4 miles) ⓘMcCoy prospects, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
4.6km (2.9 miles) ⓘCarson Mining Company Prospect, Cotopaxi Mining District, Fremont County, Colorado, USA
4.9km (3.0 miles) ⓘCotopaxi Feldspar Mine (Cotopaxi Feldspar prospect; Henry pegmatite), Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
5.0km (3.1 miles) ⓘCotopaxi prospect (Sand Gulch prospect), Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
5.9km (3.7 miles) ⓘColorado Feldspar Pegmatite, Cotopaxi Mining District, Fremont County, Colorado, USA
10.4km (6.4 miles) ⓘKnob Hill prospect (Knob Hill pegmatite), Howard, Cotopaxi Mining District, Fremont County, Colorado, USA
10.5km (6.5 miles) ⓘOgden prospect, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
11.9km (7.4 miles) ⓘSchaaf prospect, Cotopaxi Pegmatite area, Cotopaxi, Cotopaxi Mining District, Fremont County, Colorado, USA
References
Am Min 50:1179-1212
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing. 676pp.
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
 
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