Abdulgafar K Amuda

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Questions related from Abdulgafar K Amuda

Is this stockwork?

The mapped strip lies within the boundary between the Older Granite (Precambrian aged) and the Younger Granite (Mesozoic) in Central Nigeria. Occurrence of lode veins bearing cassiterite,...

14 May 2020 2,746 2 View

Is presence of normative rutile of same importance if they are not seen optically in volcanic or plutonic rock of any caution for aTiO2 in Ti-in-Zr T?

To have a good measure of semi-quantitative apparent temperatures of zircon crystallization, I am aware the guidelines of Watson1983, 2006 but want to use the modified version Ferry2007 where the...

10 June 2019 3,012 8 View

Can I get concordant ages from discordant lead isotope data?

I have data that are grossly discordant (>30%) but when I plotted and used the isochron intercept as the initial Pb-composition and fitted he discordia line without external constraints, the ages...

09 May 2019 7,356 0 View

Does sodic metasomatism have effect on zircon composition and concentric zoning in peralkaline granites? How can I describe the CL image?

The zircon grains I got from my peralkaline granites are irregular and stubby with 1:1 predominant aspect ratio from length 60 - 130 um and width 45 - 80 um to give a sub-angular outline...

29 April 2019 8,165 8 View

1. What can cause contamination/alteration of Na-Amphibole around Wolfranite ore (Scheelite) in alkaline granite? 2. I think this grain is titanite?

What could be responsible for this phenomenon of alteration or contamination of Na-Amphibole (Arfvedsonite) around some of its parts? Note that this same slide; 1. Contains dispersed grains of...

05 September 2018 304 5 View