Is vesicular basalt mafic or felsic?
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| Papers (9) | Insight |
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46 Citations | Field studies suggest that the mafic rocks are earlier than the felsic ones in sequence. |
| The parental mafic component was probably similar to silica-undersaturated, mafic lavas of the Rawls Formation. | |
173 Citations | The compositions of felsic volcanic rocks may be explained by low to moderate degrees of partial melting of mafic sources at a range of depths within rift environments where the mineralogy and composition of the source regions, modes, and degrees of partial melting, pressure and temperature of melting, and, to a lesser extent, subsequent fractionation processes, account for the compositional variations from FI through FII to FIII-FIV. |
92 Citations | Geochemical data confirm the presence of two distinct compositional groups in the mafic lavas: (1) tholeiitic basalt and (2) transitional tholeiitic basalt. |
17 Citations | The mafic and felsic lavas have identical 143 Nd/ 144 Nd ratios, consistent with consanguinity and a lack of contamination by older crust of the Superior province. |
| The mafic and felsic inclusions are compositionally similar those of the host rocks. | |
| This mineralogy suggests that lower crust rather than the mantle is the dominant source of the mafic component at SPA. | |
39 Citations | These relationships reflect the mixing of felsic and mafic magmas. |
| This study confirms the existence of felsic lavas that have dimensions comparable with the largest known mafic lavas |
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