Abstract

Petrographic and geochemical evidence, geological-structural plan, and the absolute age of the stratiform and the multiple intrusions, as well as their positions with respect to other magmatic bodies in the basin, suggest a comagmatism of the intrusions and the dikes. Distinctions between the constituents of one and the same intrusive complex so visualized are explainable by the differences in their consolidation conditions, including the relative tectonic calm in the uplifts and the relatively active tectonism and volcanism in the downwaips -- V.P. Sokoloff.

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