Zobrazeno 1 - 10
of 178
pro vyhledávání: '"John Maclennan"'
Autor:
Norbert Toth, John Maclennan
Publikováno v:
Volcanica, Vol 7, Iss 1, Pp 135-151 (2024)
Quantitative textural attributes, such as crystal size distributions or aspect ratios, provide important constraints on the thermal history of rocks. They facilitate the investigation of crystal nucleation, growth, and mixing as well as cooling rate.
Externí odkaz:
https://doaj.org/article/416c80871e6b431c9facd2a8602e45c9
Autor:
Jiabao Xu, Tiffany Lodge, Caroline Kingdon, James W. L. Strong, John Maclennan, Eliana Lacerda, Slawomir Kujawski, Pawel Zalewski, Wei E. Huang, Karl J. Morten
Publikováno v:
Advanced Science, Vol 10, Iss 30, Pp n/a-n/a (2023)
Abstract Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is characterized by debilitating fatigue that profoundly impacts patients' lives. Diagnosis of ME/CFS remains challenging, with most patients relying on self‐report, questionnaire
Externí odkaz:
https://doaj.org/article/e64e3d5fa7774b50b117e525bc11f7a5
Autor:
Michael J. Stock, Dennis Geist, David A. Neave, Matthew L. M. Gleeson, Benjamin Bernard, Keith A. Howard, Iris Buisman, John Maclennan
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-13 (2020)
In this study the authors show that monotonous basaltic volcanoes can host a range of melts in their sub-volcanic systems, extending to rhyolitic compositions. The study implies that volcanoes which have produced monotonous basaltic lavas on long tim
Externí odkaz:
https://doaj.org/article/e3992b10b6654b708dc65b91724291a3
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-14 (2020)
Olivine crystals with prominent intracrystalline distortions have previously been used to quantify deformational processes within the mantle. Here, the authors show that similar techniques can be applied to deformed volcanic olivine crystals, providi
Externí odkaz:
https://doaj.org/article/f2aa5cf9ffc9448eb8cb08c8e4fd3ed4
Autor:
Penny E. Wieser, Marie Edmonds, Cheryl Gansecki, John Maclennan, Frances E. Jenner, Barbara Kunz, Paula Antoshechkina, Frank Trusdell, R. L. Lee, EIMF
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 23, Iss 2, Pp n/a-n/a (2022)
Abstract Magmas with matrix glass compositions ranging from basalt to dacite erupted from a series of 24 fissures in the first 2 weeks of the 2018 Lower East Rift Zone (LERZ) eruption of Kīlauea Volcano. Eruption styles ranged from low spattering an
Externí odkaz:
https://doaj.org/article/07d9a90be14044958cac05f291138824
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-11 (2019)
The increasingly prevalent view of magmatic systems as mush-dominated challenges the common assumption that melt inclusions record the pre-eruptive storage and processing of the melts they were erupted with. Here, the authors show that melt inclusion
Externí odkaz:
https://doaj.org/article/cbcb976ec4914220bec7e78fc6f3e159
Autor:
Victoria C. Honour, Marian B. Holness, Bernard Charlier, Sandra C. Piazolo, Olivier Namur, Ty J. Prosa, Isabelle Martin, Rosalind T. Helz, John Maclennan, Marlon M. Jean
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019)
This study seeks to tackle the question of why intermediate magmatic rock compositions are poorly represented on the Earth’s surface. The authors do so by tracking the evolution of the physical behaviour of immiscible Fe-rich liquids within a sampl
Externí odkaz:
https://doaj.org/article/b9e319f7d3274dfbbf97b6eb4ed87460
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 4, Pp n/a-n/a (2021)
Abstract Crystallization temperatures of primitive olivine crystals have been widely used as both a proxy for, or an intermediate step in calculating, mantle temperatures. The olivine‐spinel aluminum‐exchange thermometer has been applied to sampl
Externí odkaz:
https://doaj.org/article/af960de3c16142fb9ffc27e9a6bdca1e
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 4, Pp n/a-n/a (2021)
Abstract In order to reconcile petrological and geophysical observations of magmatic processes in the temporal domain, the uncertainties in diffusion timescales need to be rigorously assessed. Here, we present a new diffusion chronometry method: Diff
Externí odkaz:
https://doaj.org/article/e37aebd514d549e09f14862e73fdfdcf
Autor:
Penny E. Wieser, Hector Lamadrid, John Maclennan, Marie Edmonds, Simon Matthews, Kayla Iacovino, Frances E. Jenner, Cheryl Gansecki, Frank Trusdell, R.L. Lee, Evgenia Ilyinskaya
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 2, Pp n/a-n/a (2021)
Abstract The 2018 lower East Rift Zone (LERZ) eruption and the accompanying collapse of the summit caldera marked the most destructive episode of activity at Kı̄lauea Volcano in the last 200 years. The eruption was extremely well‐monitored, with
Externí odkaz:
https://doaj.org/article/aee05cf993164a06acd40f326d331f57