Michigan Critical Minerals Information - Critical Mineral: Strontium; Natural Mineral Occurence: Celestite, Strontianite; General Geological Setting: hydrothermal

Present in Michigan County: None; Geological Formation: ; Specific Mine Name: None; Commercial Mining History: None; Published Literature: ; Unpublished Literature: ; Comments: Trace amounts in some pegmatites, Celestine and Anhydrite found in vugs and fractures in Silurian and Devonian carbonates in SE Lower Michigan; USGS Critical Mineral Reference:

Categories: Physical Item; Tags: critical mineral information

Michigan Critical Minerals Information - Critical Mineral: Tin; Natural Mineral Occurence: ; General Geological Setting: Granites, Pegmatites

Present in Michigan County: Marquette; Geological Formation: ; Specific Mine Name: None; Commercial Mining History: None; Published Literature: Snelgrove, A. K., Seaman, W. A., Ayres, V. L. (1943) 'Strategic Minerals Investigations in Marquette and Baraga Counties', Progress Report No. 10, Geological Survey Division, Michigan Dept. of Conservation, Lansing, MI., pgs. 62 & 66; Unpublished Literature: ; Comments: Snelgrove, et al, 1943 reports analyses of samples that range from 0.01 to 0.03 per cent; USGS Critical Mineral Reference:

Categories: Physical Item; Tags: critical mineral information