Thorium- and rare earth elements (REE)−bearing pegmatites crop out in Precambrian rocks in the southeastern Tusas Mountains (Bingler, 1968). The pegmatites of the Petaca district take a variety of shapes, such as dikes, sills, pipes, pods, troughs, and irregular forms. The pegmatites crop out for 75 to 1,430 ft (23 to 436 m) in length (an average outcrop length is 410 ft (125 m)), and they have an average width of 30 to 35 ft (9 to 11 m) (Bingler, 1968). Elevated REE concentrations in Petaca district pegmatites mainly reflect the mineral samarskite, a REE-iron-uranium-thorium-niobium-tantalum-titanium−bearing oxide.
References
USGS Open File report 2010-5220
Mineral List
Mineral list contains entries from the region specified including sub-localities
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.
This page is currently not sponsored. To sponsor this page click here.
Mineral and Locality Search
