In this book, the first dedicated entirely to the petrology of lamproites and their relationships to other potassium-rich rocks, the objective of the authors is to provide a comprehensive critical review of the occurrence, mineralogy, geochemistry, and petrogenesis of the clan. Although lamproites represent one of the rarest of all rock types, they are both economically and scientifically important and we believe the time is ripe for a review of the advances made in their petrology over the past two decades. Many of these advances stem from the recognition of diamond-bearing lamproites in Western Australia and the reclassification of several anomalous diamond-bearing kim berlites as lamproites. Consequently lamproites, previously of interest only to a small number of mineralogists specializing in exotica outside the mainstream of igneous petrol ogy, have become prime targets for diamond exploration on a worldwide basis. Contemporaneously with these developments, petrologists realized that lamproites possess isotopic signatures complementary to those of midoceanic ridge basalts, alkali basalts, kimberlites, and other mantle-derived melts. These isotopic studies provided new insights into the long-term development of the mantle by suggesting that the source regions of lamproites were metasomatically enriched in light rare earth and other incompatible elements up to 1-2 Ga prior to the melting events leading to generation of the magma.
Muu info
Springer Book Archives
1. The Lamproite ClanEtymology and Historical Perspective.- 1.1.
Introduction.- 1.2. Initial Discoveries18701906.- 1.3. Etymology of
Lamproite.- 1.4. Western Australian DiscoveriesThe Legitimization of
Lamproites.- 1.5. Johannsen and Modal Classifications of Rocks.- 1.6. Further
Developments, New Occurrences, and Diamond-Bearing Lamproites.- 1.7.
Reclassification of Anomalous Kimberlites.- 1.8. Recent Developments.-
2.
Potassic Rocks and the Lamproite Clan.- 2.1. Alkalinity, Sodic, Potassic, and
Ultrapotassic Rocks.- 2.2. Alkali-Alumina Relationships.- 2.3. Potassic
RocksGeneral Petrographie Characteristics and Terminology.- 2.4.
Petrochemical Classifications of Potassic Rocks.- 2.5. Petrographie and
Mineralogical Classifications.- 2.6. The Lamproite Clan.-
3. Description of
Lamproite OccurrencesDistribution, Age, Characteristics, and Geological
Framework.- 3.1. Introduction.- 3.2. North American and Greenland
Lamproites.- 3.3. European Lamproites.- 3.4. African Lamproites.- 3.5.
Australian Lamproites.- 3.6. Antarctic Lamproites.- 3.7. Asian Lamproites.-
3.8. South American Lamproites.- 3.9. Conclusions.-
4. Tectonic Framework of
Lamproite Genesis.- 4.1. Age and Temporal Relations of Lamproite Magmatism.-
4.2. Regional Geological and Tectonic Setting Generalizations.- 4.3.
Lithospheric History of Lamproite Settings.- 4.4. Tectonic Framework of Four
Mesozoic-to-Cenozoic Lamproite Type-Locality Magmatic Fields.- 4.5.
Conclusions and Preferred Model.-
5. Petrological Facies and Igneous Forms of
the Lamproite Clan.- 5.1. Introduction.- 5.2. Lava Flow Facies.- 5.3. Crater
and Pyroclastic Facies.- 5.4. Hypabyssal Facies.- 5.5. Plutonic Facies.- 5.6.
Generalized Model of Eruptive Sequences.- 5.7. Comparison with Kimberlite
Diatremes.- 5.8. Summary.- 6.Mineralogy of Lamproites.- 6.1. Phlogopite.-
6.2. Amphibole.- 6.3. Clinopyroxene.- 6.4. Orthopyroxene.- 6.5. Olivine.-
6.6. Leucite.- 6.7. Analcite.- 6.8. Sanidine.- 6.9. Spinel.- 6.10.
Priderite.- 6.11. Jeppeite.- 6.12. Iron Titanium Oxides.- 6.13. Potassium
Zirconium Silicates.- 6.14. Apatite.- 6.15. Perovskite.- 6.16.
Titanosilicates.- 6.17. Minor Accessory and Secondary Minerals.-
7. The
Geochemistry of Lamproites.- 7.1. Major Element Geochemistry.- 7.2.
Compatible Trace Elements.- 7.3. Incompatible Trace Elements1: Ba?Sr, Zr?Hf,
Nb?Ta, Th?U.- 7.4. Incompatible Trace Elements2: Rare Earth Elements and
Yttrium.- 7.5. Incompatible Trace Elements3: Alkali Elements.- 7.6. Volatile
Trace Elements: Fluorine, Sulfur, and Chlorine.- 7.7. Other Trace Elements.-
7.8. Interelement Relationships.- 7.9. Isotopic Composition.- 7.10. Summary.-
8. Experimental Studies Relevant to the Formation and Crystallization of
Lamproites.- 8.1. Low-Pressure Studies of Lamproites.- 8.2. High-Pressure
Phase Relationships of Natural Lamproites.- 8.3. Synthetic Systems.- 8.4. The
Oxidation State of Lamproite Magmas.- 8.5. Summary.-
9. Diamonds, Xenoliths,
and Exploration Techniques.- 9.1. Diamonds and Xenoliths: Alien, Yet
Beneficial, Companions of Lamproites.- 9.2. Diamonds.- 9.3. Xenoliths and
Xenocrysts.- 9.4. Exploration Techniques for Diamondiferous Lamproite.-
10.
Petrogenesis of Lamproites.- 10.1. Introduction.- 10.2. Previous Petrogenetic
Models.- 10.3. Genesis of the Lamproite Clan.- 10.4. Relationships to
Kimberlites.- 10.5. Relationships to MARID-Suite Xenoliths.- 10.6.
Relationships to Other Potassic Rocks and Lamprophyres.- 10.7. Summary.-
Postscript.- References.
Lisainfo e-raamatute kohta