Ahmed Hassan Ahmed

4 Questions 21 Answers 0 Followers

Questions related from Ahmed Hassan Ahmed

How to convert the log-bar unit deviation fO2 from FMQ buffer to normal fO2?

I have calculated the oxygen fugacity (fO2) as delta LogfO2 (FMQ) from the olivine-spinel pairs by the method of Balhaus et al. (1991). The results of this calculation is related to the FMQ buffer...

13 October 2018 285 0 View

Does anyone know of a way to estimate mineral proportions based on whole rock analysis?

Is there any software or excel sheet to calculate the mineral proportions (modal % of minerals) based on bulk-rock analysis. Your kind help is highly appreciated.

24 February 2015 1,633 31 View

How can we differentiate between ophiolitic gabbros and layered intrusion gabbros using geochemistry and/or mineral chemistry?

Gabbros exist as layers in both ophiolite and mafic-ultramafic layered intrusions. How can we differentiate between these modes using geochemistry?

23 April 2014 9,509 4 View

Does anybody have a spreadsheet for calculating the chlorite formula?

How to differentiate between different chlorite types, and how to estimate the octahedral and tetrahedral Al?

26 March 2014 8,417 15 View