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单词 tholeiitic
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tholeiitic

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tholeiitic

The whole rock chemistry of each studied rock corresponds to tholeiitic basalts.Geochemically, the basalts and gabbros are sub-alkaline to alkaline and show tholeiitic features.First, tholeiitic gabbro sills intruded the acid schists.Consequently, the mineral and bulk-rock chemistry strongly indicate crystallization from hydrous tholeiitic magma.Data obtained for the norite point toward an evolution from the partial melting of an anhydrous tholeiitic mantle magma.The protoliths of the studied greenstones comprise (1) plume-derived tholeiitic greenstones with oceanic plateau basalt affinity, (2) arc-derived, calc-alkaline andesites.It mainly comprises picrites and tholeiitic pillow lavas with mica gneisses and minor marbles as intercalations.
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更新时间:2025/3/14 1:34:07