Access Restriction

Author Von, Oleg ♦ Knorring ♦ Condliffe, Eric
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Meldon Aplite ♦ Rare-element Mineral ♦ Minute Crystal ♦ Complex Oscillatory Zoning ♦ Grid Ref ♦ Various Niobium-tantalum Inerals ♦ Incomplete Miscibility ♦ Nb-ta Mineral ♦ Electron-microprobe Analysis ♦ Large Number ♦ Slow Rate ♦ Particular Attention ♦ Isomorphous Columbite-tantalite Series ♦ British Isle
Abstract ABSTRACT. A number of rare-element minerals from the Meldon aplite are described, e.g. native arsenic and antimony, arsenolite, stibiconite, and various niobium-tantalum inerals. Some of the minerals are new to the occurrence and some may be new to the British Isles. Particular attention has been paid to the Nb-Ta minerals and a large number of electron-microprobe analyses for manganocolumbite, manganotantalite, and microlite are presented. Examination ofnumerous, minute crystals and fragments of columbite-tantalite revealed a complex oscillatory zoning, indicating a slow rate of cooling and perhaps incomplete miscibility of the isomorphous columbite-tantalite series. THE Meldon aplite, near Okehampton, Devon (grid ref. SX 573 927), is a highly mineralized dyke in
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article