Sarbajit Dash

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Questions related from Sarbajit Dash

If OIBs are uncommon during Archean due to higher melting degrees, why Carbonatites are found during Archean?

The absence of Ocean Island Basalts (OIBs) in the Archean rock records is commonly attributed to the higher melting degrees associated with mantle plumes. However, this explanation raises...

15 March 2024 2,173 1 View

What was the mode of weathering/erosion during Hadean to Mesoarchean?

Many think that, because of the vastness of the oceans, the continents were underwater throughout the Hadean and much of the Archean periods. It wasn't until the Mesoarchean that continents began...

20 September 2023 6,850 0 View

Why the EPMA analysis for FeO for native metal (Iron) is coming as 110, 124, 114 (wt%) etc.?

The EPMA analysis for FeO for native metal (Iron) is coming as 110, 124, 114 (wt%). What could be the possible reason?

21 July 2023 2,535 0 View

Why can not the whole mantle or at least part be called Eclogite?

If Eclogites are the highest grade metamorphic rock, and most part of the mantle covers Eclogite facies P-T condition, then why we can't call those "mantle-peridotite" rocks as Eclogites?

04 August 2022 6,668 11 View

Can ancient mantle plume signature provide a high gravity anomaly on the continental region?

Dear All, In general, plume-affected regions are characterized by low gravity anomalies, due to their high temperature-induced extensive melting. Would it be reasonable If a cratonic region is...

01 January 1970 1,414 0 View