Petrology and geochemistry of three Early Holocene eruptions from Makushin Volcano, Alaska

Probabilistic Source Classification of Large Tephra Producing Eruptions Using Supervised Machine Learning: An Example From the Alaska‐Aleutian Arc

“…Since these original efforts to quantify the spatiotemporal distribution of large explosive eruptions within Alaska, significant progress has been made in refining the number of volcanoes that not only produce caldera‐forming eruptions, but also those that produce regionally significant ash deposits (i.e., large tephra‐producing eruptions, LTPEs; caldera‐forming eruptions, CFEs). Currently, there is evidence to support that 25 active volcanoes or volcanic centers have produced LTPEs within the Quaternary, from east to west: Mount Edgecumbe (Riehle et al., 1992); Mount Churchill (Richter et al., 1995); Hayes Volcano (Riehle, 1985, 1994; Riehle et al., 1990; Wallace & Miller, 2014); Redoubt Volcano (Riehle, 1985); Augustine Volcano (Riehle, 1985; Waitt & Beget, 2009); Kaguyak Crater (Fierstein & Hildreth, 2008); Mount Katmai (Fierstein, 2007); Ugashik‐Peulic volcanic complex (Miller, 2004); Aniakchak Crater (Bacon et al., 2014; Browne et al., 2022); Black Peak (Adleman, 2004); Mount Veniaminof (Bacon et al., 2007; Wallace et al., 2020); Mount Dana (Miller & Barnes, 1976); Emmons Lake (Mangan et al., 2003, 2009); Roundtop Mountain (Carson et al., 2002); Fisher Caldera (Miller & Smith, 1977; Stelling et al., 2014); Akutan Volcano (Richter et al., 1998; Waythomas, 1999); Makushin Volcano (Larsen et al., 2020); Okmok Volcano (Beget et al., 2005); Yunaska Island (Miller & Barnes, 1976; Powers, 1958); Seguam Island (Jicha et al., 2006); Adak Island (Waythomas et al., 2001); Mount Gareloi (Coombs et al., 2012); Semisopochnoi Island (Coombs et al., 2018); Little Sitkin Island (Snyder, 1959); Davidof volcano (Powers, 1958). It is important to note, however, that Alaska has also experienced numerous glaciation events during the Quaternary (Hamilton, 1994), limiting much of the preserved proximal volcanic record to younger than ∼11 ka.…”

Mineralogical Constraints on Magma Recharge and Mixing of the Post-Collisional Potassic Volcanic Rocks in Dahongliutan, NW Tibetan Plateau

“…The injection of hot mafic magma into an evolved magma reservoir and subsequent magma mixing is not only considered as an important process causing the diversity of magma composition, but also a dominant eruption trigger for volcanoes [1][2][3][4][5][6][7]. Due to the fact that whole-rock compositions may represent the average of mineral phases and groundmass, they are unreliable for identifying open system processes of magmatic mixing.…”