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Full-Text Articles in Physical Sciences and Mathematics
The Fate Of Sulfur During Melting And Crystallization: Implications For Sulfur Transfer From Mantle To The Crust-Atmosphere System, Shuo Ding
Sustainability Seminar Series
Sulfur (S) is one of the most abundant volatiles; one that has a fundamental impact on various magmatic processes, from the mantle to the Earth’s surface. Ocean island basalts (OIB) are one of the critical probes for understanding the chemical, lithological and thermal variations in the Earth’s mantle. Therefore, S abundances of primary OIB that sample peridotite partial melts, as well as deeply recycled components, can provide a better understanding of the long-term S cycle on Earth. In this study, we developed a model to describe the behavior of sulfide and copper (Cu) during decompression melting of the mantle by …
Magmatism And Mass Extinction: Resolving The Flood Basalt Carbon Quandary, Benjamin Black
Magmatism And Mass Extinction: Resolving The Flood Basalt Carbon Quandary, Benjamin Black
Sustainability Seminar Series
Voluminous flood basalt magmatism has coincided with multiple biotic crises, including the end-Permian, end-Triassic, and end-Cretaceous mass extinctions and the Paleocene-Eocene Thermal Maximum. Geochemical evidence shows that warming and carbon cycle perturbation were features of each of these events. This proxy evidence is at odds with current estimates of the budget and isotopic composition of carbon in flood basalt magmas, which suggest that flood basalt magmatic carbon is inadequate and too isotopically heavy to explain the observations. To address the apparent conflict between paleoclimate and petrology, I present results from melt inclusions, carbonatites, geophysical modeling, and climate modeling to address …