 | | Journal (article/letter/editorial) | | High-Flux Magmatism in the Central Andes Shanaka L. de Silva1 and Suzanne M. Kay2 1811-5209/18/0014-0245$2...transcrustal magmatic system culminating in massive caldera- and ignimbrite-forming eruptions. This volcanism...volcanic caldera and ignimbrite plateau or a large silicic igneous province dominated by dacite to rhyolite...convergent margin magmatic flare-ups (e.g. de Silva 1989, de Silva et al. 2006; Kay and Coira 2009; Kay...duration of the Central Andean Neogene Ignimbrite Province approximately coincides with the last 25 million |  | | Journal (article/letter/editorial) | | Bagdonas1,*, Carol D. Frost1,*, and C. Mark Fanning2 Department of Geology and Geophysics, University of Wyoming...of central Wyoming compose part of the Wyoming province, an Archean craton that extends across most of...Dakota (Fig. 1). Today rocks of the Archean Wyoming province are exposed in the cores of basement-involved...sub-provinces (Fig. 1). The Montana metasedimentary province lies in the northwest part of the craton and is...to 4.0 Ga (Mueller and Frost 2006). The Wyoming province grew southward (present-day coordinates) through |  | | Journal (article/letter/editorial) | | Building, Queen’s Road, Bristol BS8 1RJ, UK 3 Department of Exploration, Helmholtz Institute Dresden‑Rossendorf...Nazca Group), 13–14 Ma (e.g. Huaylillas and Altos de Pica ignimbrites) and <10 Ma (Altiplano and Puna...Francis et al. 1989; de Silva 1989a, b; Wörner et al. 2000a; Lindsay et al. 2001; de Silva et al. 2006;...Lipman and Glazner 1991; and references therein). De Silva (1989a, b) introduced the flare-up concept...ignimbrite magmas derived from the middle crust (e.g. de Silva 1989a; Lindsay et al. 2001; Kay et al. 2010) |  | Burns, Dale H., de Silva, Shanaka L., Tepley, Frank, Schmitt, Axel K., Loewen, Matthew W. (2015) Recording the transition from flare-up to steady-state arc magmatism at the Purico–Chascon volcanic complex, northern Chile. Earth and Planetary Science Letters, 422. 75-86 doi:10.1016/j.epsl.2015.04.002 | Journal (article/letter/editorial) | | northern Chile Dale H. Burns a,∗,1 , Shanaka L. de Silva a , Frank Tepley III a , Axel K. Schmitt b...Oregon State University, Corvallis, OR 97731, USA Department of Earth, Planetary, and Space Sciences, University...the eruption of a large 80–100 km3 crystal-rich dacite ignimbrite. High, restricted 87 Sr/86 Sr isotope...chemistry and phase relationships indicate the dacite magma accumulated and evolved at relatively low...eruptions produced three small <6 km3 crystal-rich dacite lava domes with radiogenic bulk rock 87 Sr/86 Sr |  | | Journal (article/letter/editorial) | | B. Grocke a,b,∗ , Elizabeth Cottrell a , Shanaka de Silva b , Katherine A. Kelley c a b c Smithsonian...subducted components in the mantle source (elevated La/Nb) result in magmas that record systematically higher...Cottrell and Kelley, 2011; Crabtree and Lange, 2012; de Moor et al., 2013; Kelley and Cottrell, 2012) or...712, Table 1; Davidson et al., 1991; Davidson and de Silva, 1995; Folkes et al., 2013; Kay et al., 2011;...voluminous caldera-forming eruptions formed the Altiplano– Puna Volcanic Complex (APVC; de Silva, 1989a; |  | | Journal (article/letter/editorial) | | Frost1,*, B. Ronald Frost1, and James S. Beard2 Department of Geology and Geophysics, University of Wyoming...Petrologically the distinction between dacite and rhyolite is clear—dacite has phenocrysts of plagioclase and...the main subcaldera magma reservoir and extra-caldera lavas (Hildreth et al. 1991). The rhyolites have...Late Cretaceous Tuolumne intrusive series in the Sierra Nevada batholith, California (Coleman et al. 2012)...The 50 to 2 ka South Sister lavas are andesite, dacite, and rhyolite. Rhyolites erupted throughout the |  | Maro, Guadalupe, Trumbull, Robert B., Caffe, Pablo J., Jofré, Cynthia B., Filipovich, Rubén E., Frick, Daniel A. (2020) The composition of amphibole phenocrysts in Neogene mafic volcanic rocks from the Puna plateau: Insights on the evolution of hydrous back-arc magmas. Lithos, 376. 105738pp. doi:10.1016/j.lithos.2020.105738 | Journal (article/letter/editorial) | | Instituto de Ecorregiones Andinas (INECOA), Universidad Nacional de Jujuy - CONICET, Instituto de Geología...1661, San Salvador de Jujuy (CP 4600), Jujuy, Argentina. o r p 2 Instituto de Bio y Geociencias del...Argentino (UNSa-CONICET), 9 de Julio 14, 4405 Rosario de Lerma, Salta, Argentina. 3 GFZ German Research...from monogenetic centers in the Puna plateau of Argentina also contain amphibole phenocrysts, implying special...For example, the study of basaltic andesite to dacite rocks from 12 volcanic centers in the western Cordillera |  | | Journal (article/letter/editorial) | | occurrence of petrological cycles associated with caldera-forming events in long-lived magmatic provinces...1979; Lipman 1984; Sparks et al. 1984; Marsh 1989a; de Silva 1991) have greatly helped crystallizing ideas...schematic diagrams for several examples of large caldera systems in the U.S.A., as well as the more recent...and Sparks (2013), Cashman and Giordano (2014), and de Silva and Gregg (2014)]. At this stage, it is clear...three big active caldera systems in the Western U.S.A. There are many other caldera systems around the |  | | Journal (article/letter/editorial) | | s_mazhari@pnu.ac.ir, Urs Klötzli2, Mohammad Safari3 1 Department of Geology, Payame Noor University, 19395-4697...19395-4697, Tehran, Iran 2 of University of Vienna, Department of Lithospheric Research, Vienna, Austria ro...and consist of basaltic andesite, of andesite, dacite, and different pyroclastic units. The basaltic...three types of basaltic andesite, andesite, and dacite on the basis of mineralogical and ro geochemical...structural variations from pale yellow-light green dacite- rhyodacitic tuffs to red-dark gray of andesitic |  | | Journal (article/letter/editorial) | | University, PO Box 600, Wellington 6140, New Zealand Department of Earth Sciences, Durham University, Science...volcanic rocks (e.g., Hildreth, 1981). Large felsic (dacite to rhyolite) volcanic ignimbrites, particularly...38–57 and Dungan, 2002; Bachmann et al., 2002), Cerro Galan ignimbrite (Folkes et al., 2011; Francis et...et al., 1996)? The rapid rates of generation and ‘de-generation’ by crystallisation of eruptible melt-dominant... The Mangakino volcanic centre is a composite caldera structure located on and in part defining the northwestern |  | | Journal (article/letter/editorial) | | HRT magmatic complex. Suite C1, in contrast, is dacite to rhyolite (65.6-75.0 wt % SiO2, with Ba increasing...524670 by Buffalo State user on 22 July 2019 caldera collapse. Field data imply that the pre-A fall...four magmatic systems were housed beneath the HRT caldera area. Systems 1 and 2 were hosted in Archean crust...Quaternary silicic (dacite to rhyolite in this context) magmatic systems have generated many caldera-forming explosive...Gregg et al., 2012, 2015; Caricchi et al., 2014; de Silva & Gregg, 2014) and do not, therefore, take |
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