Pegmatites of the Van Horn Mountains, Texas
Reprinted from Economic Geology, v. 46, no. 2, 1951.Zoned and unzoned perthite-quartz-plagioclase-muscovite pegmatites in the form of tabular bodies, irregular bodies with tabular branches, irregular masses, elongate lenses, lit-par-lit zones, and small augen and stringers are distributed throughout the Precambrian metasedimentary rocks of the Mica Mine area, Van Horn Mountains, Texas. Zoned bodies have a core of erthite and quartz and a plagioclase-quartz-perthite-muscovite wall zone. The pegmatites contain numerous schist inclusions, and some show evidence of contamination by biotite schist and amphibolite.
Flawn, P. T., 1951, Pegmatites of the Van Horn Mountains, Texas: The University of Texas at Austin, Bureau of Economic Geology, Report of Investigations No. 9, 30 p.
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The University of Texas at Austin, Bureau of Economic Geology
Report of Investigation