The Blacktail Creek Tuff: an analytical and experimental study of rhyolites from the Heise volcanic field, Yellowstone hotspot system

Bolte, Torsten; Holtz, François; Almeev, Renat R.; Nash, Barbara P.

doi:10.1007/s00410-015-1112-0

Cited by 33 publications

(18 citation statements)

References 66 publications

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“…In thin section, pyroclastic textures are often completely obliterated. These distinct features are primarily the result of high magmatic temperatures and low magmatic water contents found in these units (Almeev et al, 2012;Andrews et al, 2008;Bolte et al, 2015;Cathey and Nash, 2004;Ellis et al, 2010;Honjo et al, 1992) compared to more common rhyolites, such as the examples described above. Low magmatic water contents result in less eruptive undercooling and consequent high emplacement temperatures, favoring intense welding, rheomorphism and the production of lava-like tuffs (Henry and Wolff, 1992).…”

Section: Lack Of Zoning In High-t Rhyolites Of the Snake River Plainmentioning

confidence: 94%

Remelting of cumulates as a process for producing chemical zoning in silicic tuffs: A comparison of cool, wet and hot, dry rhyolitic magma systems

Wolff

Ellis

Ramos

et al. 2015

Lithos

115

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Section: Lack Of Zoning In High-t Rhyolites Of the Snake River Plainmentioning

confidence: 94%

Remelting of cumulates as a process for producing chemical zoning in silicic tuffs: A comparison of cool, wet and hot, dry rhyolitic magma systems

Wolff

Ellis

Ramos

et al. 2015

Lithos

115

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“…The rhyolitic ignimbrites from the YSRP are commonly intensely welded and well exposed on the northern and southern margins of the Snake River Plain (SRP). The magmas from the SRP and, to a lesser extent, Yellowstone that produced these deposits were hotter (>850 °C) and drier (<3 wt.% H 2 O) than typical arc rhyolites 24 , 25 , a feature reflected in their anhydrous mineralogy typically consisting of plagioclase ± sanidine ± quartz + pyroxenes ± Fe–Ti oxides, and accessory zircon and apatite. Individual crystals commonly show limited compositional variability in major elements 25 – 27 .…”

Section: Introductionmentioning

confidence: 95%

Post-eruptive mobility of lithium in volcanic rocks

et al. 2018

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To reflect magmatic conditions, volcanic rocks must retain their compositions through eruption and post-eruptive cooling. Mostly, this is the case. However, welded ignimbrites from the Yellowstone–Snake River Plain magmatic province reveal systematic modification of the lithium (Li) inventory by post-eruptive processes. Here we show that phenocrysts from slowly cooled microcrystalline ignimbrite interiors consistently have significantly more Li than their rapidly quenched, glassy, counterparts. The strong association with host lithology and the invariance of other trace elements indicate that Li remains mobile long after eruption and readily passes into phenocrysts via diffusion as groundmass crystallisation increases the Li contents of the last remaining melts. Li isotopic measurements reveal that this diffusion during cooling combined with efficient degassing on the surface may significantly affect the Li inventory and isotopic compositions of volcanic rocks. Utilisation of Li for petrogenetic studies is therefore crucially dependent on the ability to ‘see through’ such post-eruptive processes.

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“…These melts also have stable and radiogenic isotope ratios similar to those of crustal source rocks [Anderson et al, 2000;Bindeman et al, 2010;Folkes et al, 2013;Kimura and Nakajima, 2014]. However, it is difficult to identify the source rocks and processes of felsic magmas from large eruptions through major elemental and isotopic studies due to similarities between the partial melts and the source rock isotopic compositions [Almeev et al, 2012;B egu e et al, 2014;Bolte et al, 2015;Johannes and Holtz, 1996;Patino Douce, 1996;Sisson et al, 2005]. Regional systematic comparison of the geochemistries of felsic magmas from large eruptions may provide an opportunity to better understand their source rocks and processes.…”

Section: Introductionmentioning

confidence: 99%

Origins of felsic magmas in Japanese subduction zone: Geochemical characterizations of tephra from caldera‐forming eruptions <5 Ma

Kimura

Nagahashi

Satoguchi

et al. 2015

Geochem Geophys Geosyst

120

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Dacitic to rhyolitic glass shards from 80 widespread tephras erupted during the past 5 Mys from calderas in Kyushu, and SW, central, and NE Japan were analyzed. Laser ablation inductively coupled plasma mass spectrometry was used to determine 10 major and 33 trace elements and A few tephras from SW Japan were identified as adakite and alkali rhyolite and were regarded to have originated from slab melt and mantle melt, respectively. The Pb isotope ratios of the tephras are comparable to those of the intermediate lavas in the source areas but are different from the basalts in these areas. The crustal assimilants for the intermediate lavas were largely from crustal melts and are represented by the rhyolitic tephras. A large heat source is required for forming large volumes of felsic crustal melts and is usually supplied by the mantle via basalt. Hydrous arc basalt formed by cold slab subduction is voluminous, and its heat transfer with high water content may have melted crustal rocks leading to effective felsic magma production. Coincidence of basalt and felsic magma activities shown by this study suggests caldera-forming eruptions are ultimately the effect of a mantle-driven cause.

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The Blacktail Creek Tuff: an analytical and experimental study of rhyolites from the Heise volcanic field, Yellowstone hotspot system

Cited by 33 publications

References 66 publications

Remelting of cumulates as a process for producing chemical zoning in silicic tuffs: A comparison of cool, wet and hot, dry rhyolitic magma systems

Remelting of cumulates as a process for producing chemical zoning in silicic tuffs: A comparison of cool, wet and hot, dry rhyolitic magma systems

Post-eruptive mobility of lithium in volcanic rocks

Origins of felsic magmas in Japanese subduction zone: Geochemical characterizations of tephra from caldera‐forming eruptions <5 Ma

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