Delmoe Lake area, Boulder Batholith, Jefferson Co., Montana, USA
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|Location is approximate, estimate based on other nearby localities.|
|Latitude & Longitude (WGS84):||46° South , 112° West (est.)|
|Margin of Error:||~22km|
Delmoe Lake, a reservoir located approximately 10 miles north of Homestake Pass in Jefferson County, Montana, is part of the larger mass of the Boulder Batholith and contains numerous bodies and segregations of aplite, grano-aplite, and alaskaites. These occasionally grade locally into coarse pegmatite or graphic granite, and then into vugs or cavities. The vugs contain anhedral to euhedral crystals of the characteristic granite minerals, i.e., quartz, feldspar, and mica minerals.
10 valid minerals.
The above list 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.
(William C. van Laer, in preparation)