Research paperThe effect of explosive eruption processes on geochemical patterns within pyroclastic deposits
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Cited by (20)
SO<inf>2</inf> emissions from the Timanfaya eruption (1730–36 CE), Lanzarote, Canary Islands
2024, Journal of Volcanology and Geothermal ResearchGeochemical evolution of the Paradise Mountain Caldera complex, Davis Mountains: Implications for the tectonic and magmatic evolution of Trans-Pecos Texas and adjacent Mexico
2021, LithosCitation Excerpt :If the centrally-focused eruption of the Wild Cherry Tuff described in the preceding paragraph is correct, the initial eruptive tuff from the upper regions of a magma chamber would be cooler and, possibly, more crystalline than deeper, hotter portions, thus explaining the textural anomaly. Ideally, chemical sampling of ignimbrites should be restricted to pumice clasts (Wolff, 1985). This has not been possible with Davis Mountains ignimbrites because of their dense welding.
Petrology and Sr-Nd-Pb isotope geochemistry of Late Cretaceous continental rift ignimbrites, Kap Washington peninsula, North Greenland
2012, Journal of Volcanology and Geothermal ResearchCitation Excerpt :The sample population was restricted to samples with ≤ 1% lithic fragments in order to minimise the amount of potentially non-juvenile material. We do not rule out, however, that some compositional bias may have been introduced by fractionation, accumulation and/or mixing of juvenile particles during eruption, transport and/or deposition (e.g. Walker, 1972; Wolff, 1985; Sumner and Wolff, 2003). The major and trace element compositions are reported in Table 3.
Experimental constraints on the pre-eruptive conditions of the phonolitic magma from the caldera-forming the Abrigo eruption, Tenerife (Canary Islands)
2008, Chemical GeologyCitation Excerpt :The uppermost unit of the Diego Hernández Formation (Edgar et al., 2007) and the most widespread deposit of the Las Cañadas Upper Group is the Abrigo ignimbrite, a caldera-forming deposit that covered the whole island of Tenerife (with the exception of the Anaga massif, Fig. 1) and which is the focus of this study. The petrology and geochemistry of the Upper Group phonolites and their plutonic xenoliths have been the subject of numerous studies (Wolff and Storey, 1983, 1984; Wolff, 1984, 1985a,b, 1987; Wolff and Palacz, 1989; Palacz and Wolff, 1989; Wolff and Toney, 1993; Wolff et al., 2000; Zafrilla, 2001; Bryan et al., 2002; Edgar et al., 2002, 2007) as have the contemporaneous rift and flank basalts (Neumann et al., 1999; Simonsen et al., 2000; Olin, 2003). These studies have shown that the Upper Group is volumetrically bimodal, and several of the larger phonolitic pyroclastic deposits are compositionally heterogeneous, with a range of mafic and intermediate magmatic components in addition to the dominant phonolite (Wolff, 1985a; Edgar et al., 2002, 2007).
Chapter 3 The Use of Lithic Clast Distributions in Pyroclastic Deposits to Understand Pre- and Syn-Caldera Collapse Processes: A Case Study of the Abrigo Ignimbrite, Tenerife, Canary Islands
2008, Developments in VolcanologyCitation Excerpt :Circumcaldera lithic component variations within caldera-related ignimbrite deposits indicate that pyroclastic flows were sourced from multiple vents during caldera collapse, erupting simultaneously and/or propagating along the ring fracture (Bacon, 1983, 1985; Hildreth and Mahood, 1986; Potter and Oberthal, 1987; Suzuki-Kamata et al., 1993; Cole et al., 1998). Variations in the chemical composition of juvenile clast (pumice) types (e.g. Wolff, 1985) may also support changes in the configuration of conduits and position of magma withdrawal (e.g. Druitt, 1985; Druitt and Bacon, 1986), complementing evidence gleaned from lithic analysis. For example, although the initial plinian fall deposit of the Cape Riva eruption (Santorini) shows a normal vertical gradation to less-evolved compositions, reflecting tapping of deeper magma chamber levels (Spera, 1984; Blake and Ivey, 1986), the overlying pyroclastic flow deposit is reversely zoned (Druitt, 1985), interpreted to be the result of a change in conduit position above the magma chamber.
A complex Quaternary ignimbrite-forming phonolitic eruption: The Poris Member of the Diego Hernández Formation (Tenerife, Canary Islands)
2002, Journal of Volcanology and Geothermal Research
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Present address: Geology Department, University of Texas at Arlington, UTA Box No. 19049, Arlington, TX 76019, U.S.A.