http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota
iv, 129-197 pages : illustrations, maps. ; 29 cm.
Abstract -- Introduction -- Selection of deposits for study -- Field and laboratory work -- Acknowledgments -- Uses and production of beryllim -- Exploration program -- Methods and costs -- Results -- Methods of estimating beryl content -- Tonnage of beryl-bearing units -- Grade -- Sampling -- Spectrographic analyses -- Grain measurements -- Determininations of index of refraction -- Comparison of methods used in determining grade -- Helen Beryl pegmatite -- Mine workings -- Production -- Geology -- Metamorphic rocks -- Quartz and quartz-feldspar veins -- Pegmatite -- Albite-quartz-muscovite pegmatite (wall zone) -- Granitic albite-quartz-muscovite pegmatite -- Gneissoid albite-biotite-quartz pegmatite -- Perthite-quartz-albite pegmatite (fracture-filling units in wall zone) -- Perthite-quartz-muscovite-biotite pegmatite (first intermediate zone) -- Perthite-spodumene-quartz pegmatite (third intermediate zone) -- Quartz-spodumene-perthite-albite pegmatite (core) -- Diamond-drilling -- Mineral deposits -- Beryl -- Feldspar -- Spodumene -- Mica -- Tantalite-columbite -- Elkhorn pegmatite -- Mine workings -- Geology -- Metamorphic rocks -- Pegmatite -- Quartz-albite pegmatite (wall zone) -- Perthite-quartz pegmatite (core) -- Quartz-albite-perthite pegmatite -- Diamond-drilling -- Mineral deposits -- Beryl -- Feldspar -- Mica -- Tin Mountain pegmatite -- Mine workings -- Geology -- Metamorphic rocks -- Quartz-mica schist -- Amphibolite -- Pegmatite -- Muscovite-albite-quartz pegmatite (border zone) -- Albite-quartz-muscovite pegmatite (wall zone) -- Perthite-quartz-albite pegmatite (first intermediate zone) -- Perthite pegmatite (second intermediate zone) -- Albite-quartz-spodumene pegmatite (third intermediate zone) -- Quartz-spodumene-lithia mica pegmatite (core) -- Quartz-spodumene pegmatite (fracture-filling) -- Diamond-drilling -- Mineral deposits -- Beryl -- Spodumene -- Amblygonite -- Feldspar -- Pollucite -- Muscovite -- Niobium and tantalum minerals -- Cassiterite -- References cited -- Index.
"Prepared on behalf of the United States Atomic Energy Commission."
Part of illustrative matter fold. in pocket.
Pegmatites and other Precambrian rocks in the southern Black Hills
Geological Survey professional paper ; 297-C