Sillimanite in Namaqualand
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Sillimanite in Namaqualand review of reserves and report on some low-grade deposits by D. H. de Jager

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Published by Republic of South Africa, Dept. of Mines, Geological Survey in Pretoria .
Written in English


Book details:

Edition Notes

Statementby D. H. de Jager.
SeriesBulletin / Republic of South Africa, Dept. of Mines, Geological Survey ;, 40, Bulletin (Geological Survey (South Africa)) ;, 40.
Classifications
LC ClassificationsMLCM 95/01631 (G)
The Physical Object
Paginationv, 42 p. :
Number of Pages42
ID Numbers
Open LibraryOL848123M
LC Control Number95127434

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The spring flowers of the Cape West Coast, Cederberg and Namaqualand in the Northern Cape have a worldwide reputation. This area of South Africa receives little rain throughout the year but after the winter rains from May to July/August, the normally dry landscape becomes a carpet of wild flowers with vibrant bands of gousblomme and vygies, as well as nemesias, lachenalias, babiana and ixias. Named by George Thomas Bowen in in honor of Benjamin Silliman, Sr. (August 8, , North Stratford (Trumbull), Connecticut, USA - Novem , New Haven, Connecticut, USA), Professor of Chemistry and Geology, Yale University, New Haven, Connecticut, USA, and founder of the American Journal of Science (Silliman's Journal).   About this book. Namaqualand is justifiably famous for the floral wonderland it becomes in spring, when seas of bright flowers carpet the land. Astonishingly, the carpet comprises some 3, species, of which 28% are endemic. Occurrence. Sillimanite is one of three aluminosilicate polymorphs, the other two being andalusite and kyanite.A common variety of sillimanite is known as fibrolite, so named because the mineral appears like a bunch of fibres twisted together when viewed in thin section or even by the naked eye. Both the fibrous and traditional forms of sillimanite are common in metamorphosed sedimentary ry: Nesosilicate.

DE JAGER D H Sillimanite in Namaqualand: Review of Reserves and Report on some Low-grade Deposits. As the economic life of the known deposits is drawing to a close, the investigation has shifted to lower grade deposits in the Steinkopf, Witbank, and the Kenhardt district.. 42 pp with diags and maps, one fold-out map. Good condition in wraps. Namaqualand flowers. K likes. Namaqualand flowers, brought to you by We invite people to post pics and reports Followers: K. Sillimanite is composed of aluminum silicate, which is a polymorph; sillimanite, kyanite and andalusite all share the same chemical composition (Al2SiO5), but each exhibit differing unique crystal structures. Sillimanite forms as orthorhombic, hexagonal crystals, whereas kyanite and andalusite crystals are both formed as triclinic crystals. Namaqualand Accommodation. If you are looking for Namaqualand holiday accommodation, SafariNow has a selection of Self-catering, Guest House, Bed and Breakfast holiday accommodation in Namaqualand and surrounds. With listings in Namaqualand, our handy Namaqualand map search and great low prices, it's easy to book the perfect holiday accommodation for your Namaqualand visit.4/5().

(mineralogy) A fibrous neosilicate mineral, polymorphic with andalusite and kyanite, with the chemical formula Al2SiO5.^ Richard V. Gaines, H. Catherine W. Skinner, Eugene E. Foord, Brian Mason, and Abraham Rosenzweig: Dana's new mineralogy, John Wiley & Sons, Namaqualand from the Knersvlakte in the south to the Richtersveld in the north; from the coast in the west as far inland as Aggeneys in Bushmanland. The weather certainly challenged our powers of endurance. From berg winds with temperatures in excess of35°C on the Knersvlakte, we were plunged two days later into sub-zerotemperatures with a':rFile Size: 3MB. SILLIMANITE. In hand sample, sillimanite is typically white, but can be very difficult to see owing to its fine grain size. In thin section, sillimanite is colorless in plane light, although mats of fibrous sillimanite (fibrolite) can be brownish/tan. Under crossed polars, sillimanite has second order interference colors. Sillimanite from Northern Cape, South Africa. M. L. (). Werdingite, a new borosilicate mineral from the granulite facies of the western Namaqualand metamorphic complex, South Africa. American Mineralogist, 75(), Mineral and/or Locality.