Zobrazeno 1 - 10
of 57
pro vyhledávání: '"D. K. Bailey"'
Autor:
Alan R. Woolley, D. K. Bailey
Publikováno v:
Mineralogical Magazine. 76:259-270
A recent database and world distribution map of carbonatites supports previous observations of the spatial and temporal aspects of these rocks, and provides new observations that are important for understanding their petrogenesis. These data reveal t
Autor:
Stuart L. Kearns, D. K. Bailey
Publikováno v:
Mineralogical Magazine. 76:271-284
In the Calatrava province of central Spain, numerous Quaternary pyroclastic vents have erupted carbonatite magmas carrying silicate melt fragments, mantle debris and megacrysts. Lava flows are rare. Maar and scoria deposits have carbonate matrices an
Autor:
D. K. Bailey, Stuart L. Kearns
Publikováno v:
Mineralogical Magazine. 66:379-384
Magnetite is present in most carbonatites, and in the most abundant and best-known form of carbonatite, coarse-grained intrusions, it typically falls in a narrow composition range close to Fe3O4. A fine-grained carbonatite from Zambia contains magnet
Autor:
J. D. Collier, D. K. Bailey
Publikováno v:
Mineralogical Magazine. 64:675-682
Italian carbonatites form part of a suite with melilitites, normally an association characteristic of continental interiors; the perfect analogue of the Italian suite being the kamafugites (from the type area in SW Uganda, where the western branch of
Publikováno v:
Mineralogical Magazine. 63:615-631
The Rockeskyll complex in the north, central part of the Quaternary West Eifel volcanic field encapsulates an association of carbonatite, nephelinite and phonolite. The volcanic complex is dominated by three eruptive centres, which are distinct in th
Publikováno v:
IBM Journal of Research and Development. 37:411-420
An electron beam lithography system suitable for manufacturing X-ray masks with critical dimensions down to 0.35 µm is described. The system features a 50-kV variable shaped spot (VSS) electron column with a variable axis immersion lens (VAIL). This
Autor:
D. K. Bailey
Publikováno v:
Geological Society, London, Special Publications. 68:91-98
Autor:
D. K. Bailey, Bryne T. Ngwenya
Publikováno v:
Journal of the Geological Society. 147:213-216
Fine grained carbonatite in the Kaluwe complex has been inferred, on textural grounds, to be calcified natrocarbonatite. Electron microprobe analysis, however, shows that the brown laths thought to be pseudo-nyerereite are dolomitic, with Sr values m