6 Questions 28 Answers 0 Followers
Questions related from Ahmed Hassan Ahmed
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 322 0 View
I am wonder if there is any scientific or economic study for Al-spinel deposits (mostly Cr-poor, Cr2O3 < 1 wt.%). In most known cases the chromite deposit is a Cr-rich or Al-rich chromitites...
29 March 2015 5,490 7 View
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 1,672 31 View
Will appreciate very much if anyone can send me an excel spreadsheet for estimating P-T-depth of mantle rocks using mineral chemistry of olivine, opx, cpx and spinel
05 February 2015 5,299 6 View
Gabbros exist as layers in both ophiolite and mafic-ultramafic layered intrusions. How can we differentiate between these modes using geochemistry?
23 April 2014 9,553 4 View
How to differentiate between different chlorite types, and how to estimate the octahedral and tetrahedral Al?
26 March 2014 8,461 15 View