GMPV
Geochemistry, Mineralogy, Petrology & Volcanology

Geology

Photos-supported and References-based Guide on Gemstones and Semi-gemstones Focusing on their Impacts and Uses in the Ancient Egyptian Civilization

March 20, 2025
Photos-supported and References-based Guide on Gemstones and Semi-gemstones Focusing on their Impacts and Uses in the Ancient Egyptian Civilization
Epidote Semi-gemstone Occurrence. ©Metwally Hamza

Geology is more than just studying rocks and minerals; it is also about learning everything you can about the past, studying the present, and finally predicting the future, making the most of your human edition ━ Metwally Hamza. . . .   . . .   . . . “I dedicate this guide and topic to my dear professor Dr. Zakaria Hamimi, who inspires me with his achievements.” . . .   . . .   . . . G ...[Read More]

Granite Rocks: Mineralogy, Geochemistry, Textures, Types, Main Varieties, Uses, and More

March 13, 2025
Granite Rocks: Mineralogy, Geochemistry, Textures, Types, Main Varieties, Uses, and More
Two facies of G3-granite with columnar joints. ©Metwally Hamza

Granite is a coarse-grained, crystalline, plutonic, felsic, and acidic igneous rock. It contains more than 66% of silica “SiO2”, and about 14.42% of alumina “Al2O3”. The quartz makes up 10% : 50% of the whole rock. The alkali feldspars range from 65% to 90% of the entire rock. It’s leucocratic “light-colored”. The equivalent volcanic rock of granite is rhyolite. The melting point of most dry grani ...[Read More]

GMPV Campfires – call for Speakers

December 17, 2024
GMPV Campfires – call for Speakers
Image Credit: Thomas P. Ferrand (distributed via imaggeo.egu.eu)

The EGU Geochemistry, Mineralogy, Petrology and Volcanology ECS committee is currently looking for early career scientists to present at and attend our monthly online talk series (EGU Campfires).  The EGU Campfires are a free one-hour online seminar consisting of three 10-12-minute talks. These quick-fire presentations give you an opportunity to share your work in a relaxed and friendly environmen ...[Read More]

THE CHALLENGES OF DATING – GEOLOGISTS’ VERSION (part two)

October 28, 2024
THE CHALLENGES OF DATING – GEOLOGISTS’ VERSION (part two)
Heart-shaped minerals photomicrograph by Bernardo Cesare, from the Imaggeo archives

Whether the first four robust candidates for the love of your (geological) life did not match your expectations (if you missed part one, check it here) or you are feeling polyamorous looking for some other options and perspectives, other bachelors/bachelorettes datable phases can be everything you have been looking for.   Here are some other minerals used in geochronology, as if they were featured ...[Read More]