Publications by authors named "Dougal A Jerram"
Article Synopsis
- The study focuses on the Siberian Traps magma and its role in creating a sub-volcanic plumbing system, leading to the formation of sills in the Tunguska Basin that release gases during metamorphism.
- The findings reveal that sills over 100 meters thick are common, especially in Cambrian evaporites, with an average thickness of 115-130 meters.
- Thermal modeling indicates these sills can generate significant amounts of CO₂, reinforcing the idea that sub-volcanic activity contributed to environmental changes during the End-Permian crisis.
Radioisotopic dating of volcanic minerals is a powerful method for establishing absolute time constraints in sedimentary basins, which improves our understanding of the chronostratigraphy and evolution of basin processes. The relative plate motions of Greenland, North America, and Eurasia changed several times during the Palaeogene. However, the timing of a key part of this sequence, namely the initiation of compression between Greenland and Svalbard, is currently poorly constrained.
View Article and Find Full Text PDFThe time lag between intrusion of fresh, hot magma and an ensuing eruption is of critical importance in both understanding the triggering and mitigating the consequences of volcanic eruptions. This work looks at material erupted during 1925-28 at the Nea Kameni volcanic center in Santorini, Greece, to determine this time scale. By exploiting Fe-Mg diffusion in olivine crystals, we constrained the intrusion-to-eruption time lag to between 3 and 10 weeks.
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