000			02344nam a22003257a 4500
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020			_a9780306421730 (hbk.) _c€ 219.99
040			_bENG _cIISER BPR
041			_aENG
082			_223rd _a552 _bMIT
100			_aMitchell, Roger Howard _91297
222			_aEarth Sciences
245			_aKimberlites : _bMineralogy, geochemistry and petrology
250			_a1st ed.
260			_aNew York: _bPlenum Press, _cc1986.
300			_axv, 442p. : _bill. ; _c24cm.
504			_aIncludes bibliographical references and index.
520			_aThis is a book about the petrology of kimberlites. It is not about upper mantle xenoliths, diamonds, or prospecting for kimberlites. The object of the book is to provide a comprehensive survey and critique of the advances which have been made in kimberlite studies over the last twenty-five years. Kimberlites are rare rock types; however, their relative obscurity is overriden by their economic and petrological importance to a degree which is not shared with the commoner varieties of igneous rocks. Kimberlites are consequently of interest to a diverse group of earth scientists, ranging from isotope g~ochemists concerned with the evolution of the mantle, to volcanologists pondering the origins of diatremes, to exploration geologists seeking new occurrences of the diamondiferous varieties. A common factor essential to all of these activities is a thorough understanding of the characteristics of kimberlites. For the petrologist, kimberlites are exciting and challenging objects for study. Their petrographic diversity, complex mineralogy and geochemistry, and unusual style of intrusion provide endless opportunities for stimulating hypothesis and conjecture concerning their origin and evolution. Kimberlites are a part of a wide spectrum of continental intra-cratonic magmatism. Only by understanding all of the parts of this activity in detail may we make progress in our understanding of the whole.
650			_aEarth Sciences _91298
650			_aPetrology _91299
650			_aPetrogenesis _91300
650			_aGeochemistry _91301
650			_aIgneous rock _91302
650			_aMineral _91303
650			_aMineralogy _91304
650			_aHistorical geology _91305
942			_2ddc _cBK _02
999			_c3173 _d3173