THE CHEMICAL SIGNATURES OF GRANITES
Granite chemistry underwent a revolution in the 1980s. Distinctive patterns in major and trace-element compositions were recognized and categorized in such a way that the likely source materials and tectonic environments of granite magmas could be discriminated. Despite the relative ease and reliability with which granite provenance can now be ascertained, the causes of those patterns have not been identified except in the most general ways. Moreover, evolved granites and pegmatites accentuate those trace element signatures, but these are highly modified by fractional crystallization.
Our work on pegmatites has a complementary component in the origins of granite magmas at anatexis. By calibrating the stoichiometry of melting reactions and the partition coefficients for major and trace elements between minerals and coexisting partial melts, we can determine, precisely, how the trace-element signature of a granite melt is acquired. The same partitioning studies describe how the composition of a granitic liquid will change with crystal fractionation.
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Marble Product
Marble is an extremely versatile material that is prized for its beauty and durability on many different surfaces. It does however, require a modest amount of care to protect it against staining, scratching and loss of surface polish.
Granite Jacuzzi
In the bathroom, granite gives a sumptuous, luxurious feel. It is often used to surround Jacuzzi tubs or framed Roman tubs. And the feeling of being immersed in water and wrapped in polished stone is second-to-none.
Marbles
In Chhotanagpur area, there are deposits of at least five different colours of marble. On the basis of variation in colour and design, there will be many sub varieties of the main five varieties.
