Although some handbooks on the microscopic identiÂ In Part I the concept of heavy mineral analysis is fication of heavy mineral grains are available, a introduced and the relative significance of factors comprehensive manual illustrated in colour has not affecting heavy mineral assemblages is discussed. There been published until now. Because the appearance of are brief references to the commonly used laboratory minerals in grain mounts differs considerably from methods and auxiliary techniques. It concludes with those seen in a thin section, a different approach is some examples of the application of heavy mineral necessary for the identification of detrital grains. studies. Coloured photomicrographs, showing their colour Part II contains the descriptions of 61 transparent shades, pleochroism and interference tints, provide heavy mineral species, including those which are an excellent means of assisting recognition. As a commonly authigenic in sediments. Positive identiÂ number of mineral grains have similar optical properÂ fication of authigenic minerals is important to avoid ties and morphology, it is equally important to confusion and to help recognition of diagenetic describe them verbally in detail, pointing out events. In the mineral descriptions considerable characteristic features and differences. emphasis is placed upon detrital morphology and This book is intended primarily as a manual that diagnostic features. Optical properties and characterÂ describes and illustrates the transparent heavy minÂ istics are detailed, together with information on host erals most commonly found in sediments. It is hoped rocks.
Discover More: Rocks and Minerals is much more than a simple spotters' guide.
reviewers, and reported by users of the earlier This third edition (or issue) of the Quantitative Data File for ore minerals (QDF) of the Commission on editions. The result is that 510 species and 125 are Mineralogy of the International Mineralogical compositional or structural variants, or varieties, of Association (COM-IMA) is published, with the species, are represented in QDF3. A large number of support of the Natural History Museum, London, by the entries include data collected from the type Chapman & Hall. It has been greatly revised and specimen of a mineral: these include data extracted enlarged and now includes graphs of the reflectance from the published literature. In this respect, QDF3 spectra for all of its entries. These have been differs from earlier editions. included in response to requests from users of the We have also revised and simplified the notes earlier editions. Also included, for those users concerning X-ray data: no longer are the strongest unfamiliar with the application of such spectra to lines in the powder diffraction pattern quoted, nor mineral identification, are introductory notes, are cell dimensions generally given. Instead, it was illustrated with examples of R spectra. decided to refer to data from the original description, The 635 data sets, which are arranged or to data in the PDF of the JCPDS.
Nutrition products Articles
Nutrition products Books