Daniel S. Barker
University of Texas at Austin
25 Papers
316 Citations
Daniel S. Barker is an academic researcher from University of Texas at Austin. The author has contributed to research in topics: Magma & Alkali feldspar. The author has an hindex of 15, co-authored 25 publications.
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Papers
Occurrence and Origin of Andalusite in Peraluminous Felsic Igneous Rocks
D. B. Clarke,Michael J. Dorais,B. Barbarin,Daniel S. Barker,Bernardo Cesare,Geoffrey L. Clarke,M. El Baghdadi,Saskia Erdmann,Hans-Jürgen Förster,Martha Leticia Gaeta,B. Gottesmann,Rebecca Anne Jamieson,Daniel J. Kontak,Friedrich Koller,CL Gomes,David London,George B. Morgan,Ljpf Neves,Drm Pattison,Ajsc Pereira,Michel Pichavant,Carlos W. Rapela,Axel D. Renno,Simon Richards,Malcolm P. Roberts,A. Rottura,J. Saavedra,Alcides N. Sial,Alejandro J. Toselli,JM Ugidos,Pavel Uher,Carlos Villaseca,Dario Visonà,Donna L. Whitney,Ben J. Williamson,HH Woodard +35 more
TL;DR: In this paper, the authors examined 108 samples of andalusite-bearing felsic rocks from more than 40 localities world-wide and found that the majority of them show no textural or chemical evidence suggesting a magmatic origin.
High-Ca, low-alkali carbonatite volcanism at Fort Portal, Uganda
Daniel S. Barker,P. H. Nixon +1 more
TL;DR: A quaternary volcanic field at Fort Portal, SW Uganda, contains approximately 50 vents that erupted only carbonatite, and reaction relations suggest that these "phenocryst" phases are actually xenocrysts, perhaps from a source similar to that which supplied phlogopite clinopyroxenite xenoliths as mentioned in this paper.
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Compositions of Granophyre, Myrmekite, and Graphic Granite
TL;DR: Granophyric intergrowths of quartz and feldspar form three distinct types that differ in bulk composition as well as texture, occurrence, and genesis as mentioned in this paper, and occur as mesostasis, groundmass, and megacrysts.
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Calculated silica activities in carbonatite liquids
TL;DR: In this paper, the authors measured silica activity for equilibria involving silicates and a silica component in carbonatite liquids to predict specific assemblages for silicate and oxide phases of carbonatites.
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Northern Trans-Pecos magmatic province: Introduction and comparison with the Kenya rift
TL;DR: The Trans-Pecos magmatic province of West Texas and southern New Mexico is a more eroded analogue of the Kenya (Gregory) rift in East Africa as discussed by the authors, providing likely parents for the entire observed range of silica saturation.
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