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Questions related from Daniel Do Valle Lemos-Santos
What does the lack of biotite in granite mean even though there are amphiboles in the modal composition? Should biotite be a petrogenetic mineral in granite magmas?
30 August 2019 5,463 3 View
Is it possible find in A-type (peralcaline) granites the Arfvedsonite post-magmatic? Which minerals are part of this reaction together with piroxene? tks
07 February 2019 782 2 View
Geochemistry in zircons. Does it change in the compressive magmatism and reflect in the zircon crystal?
12 April 2018 7,464 2 View
We analyse U-Pb in zircons here and our data of 202 Hg is starting with 30000 cps and decrease 1000 per hour. We changed filters, gas, clean the station and heat the gold...nothing worked.
26 February 2018 2,621 3 View
