Uriah Alexander Lar

6 Questions 27 Answers 0 Followers

Questions related from Uriah Alexander Lar

What could be responsible for the significant Eu anomalies in varieties of hydrothermal flourite minerals hosted by sedimentary rocks?

REE distributions of some varieties of flourite minerals from sedimentary rocks-hosted hydrothermal vein display LREE enrichment relative to HREE (30-300x Chondrite). All patterns show very...

27 August 2016 8,377 6 View

Could someone explain to me what might have caused the sudden change of water to red colour in a volcanic crater lake?

We have been monitoring this crater lake for about five years, it is suspected to be the youngest among a series of volcanoes. We have never encountered this phenomenon. We are yet to send samples...

16 December 2014 2,014 12 View

Would one envisage crustal involvement in the evolution of a suite of basaltic rocks which show significant enrichment in Zr and SiO2?

A correlation of the concentrations of SiO2 versus Zr for a suite of basalts show a progressive increase in SiO2 relative to Zr content. Where is the zirconium coming from being a low temperature...

24 October 2014 1,931 5 View

How does one explain the presence of a crustal rock with mantle signature in an Alpine Peridotite Massif?

A rock sampled from an Alpine peridotite massif was petrologically referred to as gneiss (consisting of amphiboles, plagioclase, and quartz with accessory zircon). Geochemical analysis of the rock...

17 October 2014 8,487 8 View

I intend to use isotope ratio (eg87Sr/86Sr) to classify sedimentary formations. Which isotopes will be the most ideal?

Most sedimentary formations in my country have been classified based on their fossil content or granulometry. There has been controversies here and there. Can geochemistry solve the problem?

13 March 2014 5,871 6 View

What is the most reliable digestion method for bio-materials for assessing biotoxicity (knowing that many toxic metal compounds are insoluble)?

What kind of bioassay would be appropriate? I use aqua regia to digest especially plant tissues for trace metals analysis on ICP OES. Will I get the total metal concentration or partial?

06 March 2013 4,385 2 View