Is the positive Eu anomaly caused by plagioclase presence in basalts?
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The positive Eu anomaly in basalts is not caused by the presence of plagioclase. Instead, it is related to the magmatic differentiation and plagioclase feldspar fractional crystallization processes . Plagioclase crystals can form in basaltic liquids through interaction with preexisting zones of crystal cumulates within the lower crust . The enrichment of plagioclase in basalts is not due to buoyancy or selective concentration of plagioclase phenocrysts by floatation within a magma chamber . The presence of plagioclase in basalts is influenced by the ascent velocity of the magma, which must be greater than the settling rate of the plagioclase phenocrysts for eruption to occur . Therefore, the positive Eu anomaly in basalts is not directly linked to the presence of plagioclase, but rather to the processes of magma differentiation and crystal cumulate interaction .
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| Papers (5) | Insight |
|---|---|
| Yes, the positive Eu anomaly in basalts is caused by the presence of plagioclase. | |
| The presence of plagioclase in basalts can cause a positive Eu anomaly. | |
| No, the positive Eu anomaly in basalts is not caused by the presence of plagioclase. | |
17 Oct 2022 | No, the positive Eu anomaly is not caused by plagioclase presence in basalts. It is observed in Ca-plagioclase-rich anorthosite derived from the mantle. |
| Yes, the positive Eu anomaly in basalts is likely caused by the presence of plagioclase, according to the study. |
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