A5047983121- Geochemistry and Elemental Analysis
- Geological and Geochemical Analysis
- Silicon Effects in Agriculture
- Astro and Planetary Science
- Paleontology and Stratigraphy of Fossils
- Planetary Science and Exploration
University of St Andrews
2023-2024
University of Cambridge
2024
Unraveling ancient melting processes is key to understanding how the earliest, tonalite-trondhjemite-granodiorite (TTG)-dominated continental crust formed from partial of amphibolite. Application silicon isotope analysis reveals that Archaean TTGs exhibit consistently high Si values (δ30Si) compared modern granitoids, attributed seawater-derived silica introduced by either (a) variably silicified basalts or (b) assimilation authigenic silica-rich marine lithologies in melt source. However,...
On the anoxic Archean Earth, prior to onset of oxidative weathering, electron acceptors were relatively scarce, perhaps limiting microbial productivity. An important metabolite may have been sulfate produced during photolysis volcanogenic SO