منابع مشابه
Optical Mineralogy
II. Polarizing light microscope and geological samples III. Refractive index and its measurement IV. Optical classes-indicatrix theory V. Relationship of optical properties to crystal chemistry VI. Advanced methods in optical mineralogy GLOSSARY anisotropic mineral: A mineral with more than one principal refractive index. birefringence: The mathematical difference between the largest and smalle...
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Editor: T.M. Harrison Non-arc basalts of Archean and Proterozoic age have model primary magmas that exhibit mantle potential temperatures TP that increase from 1350 °C at the present to a maximum of ∼1500–1600 °C at 2.5–3.0 Ga. The overall trend of these temperatures converges smoothly to that of the present-day MORB source, supporting the interpretation that the non-arc basalts formed by the m...
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ژورنال
عنوان ژورنال: Nature
سال: 1963
ISSN: 0028-0836,1476-4687
DOI: 10.1038/200003a0