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PETROGENESIS OF BASALTS OF TOLBACHIK ERUPTION IN 1975-76 ON KAMCHATKA AND SOME PROBLEMS OF HIGH-ALUMINUM BASALT MAGMAS FORMATION IN REGIONS OF ISLAND-ARC
被引：0
|作者：
LUKANIN, OA
KADIK, AA
BORISOV, AA
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中图分类号：
P3 [地球物理学];
P59 [地球化学];
学科分类号：
0708 ;
070902 ;
摘要：
On the base of previously obtained experimental data on Tolbachik basalts crystallization under varied pressure [1, 2] and available geochemical information a new petrologic model for magnesium and aluminum basalt magmas formation as well as for intermediate composition is suggested. According to the model the crystallization differentiation of parent high magnesium magmas (approximately 14% wt. MgO) took place on the depth 20-40 km. As a result of mixture processes between this composition and differentiated residual liquids all spectrum of composition of Tolbachik eruption could be derived.
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页码：100 / 112
页数：13
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