Evolution of natrocarbonatite from a wollastonite nephelinite parent: Evidence from the June, 1993 eruption of Oldoinyo Lengai, Tanzania
Lapilli and unusually thick, high viscosity lavas extruded from Oldoinyo Lengai in June, 1993 are composed of crystal-rich natrocarbonatite containing a small proportion of porphyritic silicate spheroids. The silicate spheroids are of wollastonite nephelinite mineralogy, but they also contain natroc...
Main Authors: | Dawson, J, Pyle, D, Pinkerton, H |
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格式: | Journal article |
出版: |
1996
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