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Alkaline rocks of the deccan traps
Bulletin Volcanologique, 1971Recent investigations on the Deccan Traps reveal many new findings of alkaline rocks more commonly occurring as minor intrusions than as lava flows. In comparison to the vast extent of the Deccan Traps, the alkaline rocks are negligible in their volume and are confined to tectonic belts in parts of Western India.
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What Is the "Calc-alkaline Rock Series"?
International Geology Review, 2002The "calc-alkaline" series of rocks was originally defined in the early 1930s on the basis of the "alkali-lime index" on a combined SiO2 versus (Na2O + K2O) and SiO2 versus CaO plot.
Hetu C. Sheth +2 more
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Chapter 14 Kimberlites, Carbonatites, and alkaline rocks
2005Publisher Summary Even though alkaline rocks represent a small fraction of all igneous rocks, in fact less than 1%, they cover such a wide range of chemical and mineralogical diversity that they account for nearly half of all igneous rock names. The petrogenesis of these rocks is particularly interesting, in part because of their great variability ...
H.E. O'Brien, P. Peltonen, H. Vartiainen
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Prospection for Niobium-Rich Alkaline Rocks
1989Nb belongs to the fifth group of the periodic table of the elements. Its atomic number is 41, its atomic weight is 92.9046 and its electronegativity is 1.6. In a six-fold coordination its ionic radius is 0.64, 0.68 and 0.62 A for the valencies of 5, 4 and 3 respectively.
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Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars
Science, 2022Ken Farley +2 more
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Radionuclide transport in multi-scale fractured rocks: A review
Journal of Hazardous Materials, 2022Xiaoying Zhang +2 more
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