Nathan A. Graham
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View article: Using dissolution surfaces in crystal clots to quantify pressure changes preceding the 2006 eruption of Augustine Volcano, Alaska
Using dissolution surfaces in crystal clots to quantify pressure changes preceding the 2006 eruption of Augustine Volcano, Alaska Open
Quantifying the buildup of pre-eruptive excess pressure in volcanic systems is crucial for the understanding of eruption-triggering mechanisms. The 2006 eruption of Augustine Volcano, Alaska, provides an excellent opportunity to investigat…
View article: Magmatic immiscibility and the origin of magnetite-(apatite) iron deposits
Magmatic immiscibility and the origin of magnetite-(apatite) iron deposits Open
View article: Glass electron microprobe analyses methods, precision and accuracy for tephra studies in Alaska
Glass electron microprobe analyses methods, precision and accuracy for tephra studies in Alaska Open
This publication reports analytical conditions and secondary standard results for electron probe microanalysis (EPMA) of glass in support of tephra studies in Alaska between 2018 and 2023.Long-term accuracy and precision are evaluated for …
View article: Magmatic immiscibility and the origin of magnetite-(apatite) iron deposits
Magmatic immiscibility and the origin of magnetite-(apatite) iron deposits Open
The origin of magnetite-(apatite) iron deposits (MtAp) is among the most contentious issue in ore geology with competing models involving purely hydrothermal to magmatic processes. We study here melt inclusions trapped in plagioclase pheno…
View article: Constraints on eruption processes and event masses for the 2016–2017 eruption of Bogoslof volcano, Alaska, through evaluation of IASI satellite SO2 masses and complementary datasets
Constraints on eruption processes and event masses for the 2016–2017 eruption of Bogoslof volcano, Alaska, through evaluation of IASI satellite SO2 masses and complementary datasets Open
View article: Magnetite-Apatite Deposits at El Laco, Chile, Formed by Eruption of Fe-Rich Immiscible Melt
Magnetite-Apatite Deposits at El Laco, Chile, Formed by Eruption of Fe-Rich Immiscible Melt Open
View article: The Influence of Phenocrysts on Degassing in Crystal‐Bearing Magmas With Rhyolitic Groundmass Melts
The Influence of Phenocrysts on Degassing in Crystal‐Bearing Magmas With Rhyolitic Groundmass Melts Open
The porosity at which a magma becomes permeable (i.e., the percolation threshold; ϕ c ) is important for magma degassing; it is also poorly constrained in crystal‐bearing systems. To address this, we conduct high pressure‐temperature decom…