Washington State University

Pullman, Washington, United States

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School of Mechanical and Materials Engineering
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School of Electrical Engineering and Computer Science
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Department of Chemistry
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    ABSTRACT: Bulk-rock major-and trace-element composition, pehogaphy and mineral compositiolts are presented for a diverse suite of 22 prirn/.nve mafic lavas in the Cascade Range of northem Oregon and southern washington. ivltl tne exception of an early Western Cascade basalt, all the rocks are younger than 7 Ma Intensive parumeters lfGt2O),f(O2),T, pl for rhe magnas have been inferred mostly from equilibrium olivine-liquid and plagioclas€-liquid relations. Nearly anhydrous, MoRB-Ule, low-K tholeiite was probably derived from relatively high degreei ofdecompression-induced melting of sha[ow, depleted relatively qmetasomalze{ lithospheric mantle during intra-arc rifting. The degree of partial melting dJcreases northward along the ari, whereas the depth of average melt generation increases. OIB-like basalt reprJsents deeper, wetter, smallerdegree melts of more enriched asthenospheric mantle, unaffected by subduction. Olivine analcimite resembles the silicate melt considered resoonsible for within-plate mantle metasomatism. Post-7-Ma subduction-related basalt was derived by low degrees of partial milt"g of subduction-metasomatized gamet therzolite, similar to OIB-like basalt source-mantle beiore modification. The spectrum of subduction-related basalt from cooler and wetter (and stghtly more oxidized) absarokite to progressively hotter and drier high-K calc-alkaline basalt and calc-elkaline basalt seems to be due to varying degrees of metasomatism of the deep mantle wedgl by relatively cool, wet" ULE-ich absarokitic magmas coming from near the suMucted slab. Early Westem Cascade basalt is nore typically arc-like in is composilo1 and nineralogy, and was probably generatedunderHzO-riih conditions when more vigorous |ub{uction prevailed. Depleted basaltic andesite may have been generated by low degrees of partial melting of residual harzburgite' possibly formed during the generation of early westem cascade basalt.
    01/2019; 35:367-396.
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    ABSTRACT: Pentalonia nigronervosa (sensu Hardy 1931) samples from banana and from Zingiberaceae and Araceae species exhibit fixed differences in DNA sequence in mitochondrial cytochrome oxidase subunit 1 ("DNA barcode") and in the nuclear gene elongation factor 1α, and have morphometric differences, including non-overlapping ranges in the length of the distal rostral segment. It is thus proposed that the name P. nigronervosa Coquerel be restricted to banana-feeding 'nigronervosa' specimens, and that the name Pentalonia caladii van der Goot be restored to full species status for specimens typically feeding on Zingiberaceae and Araceae.
  • Nuclear Medicine and Biology. 08/2014; 41(7):615.


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International Journal of Hospitality Management. 01/2008;

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