 | Price, Richard C., Smith, Ian E.M., Stewart, Robert B., Gamble, John A., Gruender, Kerstin, Maas, Roland (2016) High-K andesite petrogenesis and crustal evolution: Evidence from mafic and ultramafic xenoliths, Egmont Volcano (Mt. Taranaki) and comparisons with Ruapehu Volcano, North Island, New Zealand. Geochimica et Cosmochimica Acta, 185. 328-357 doi:10.1016/j.gca.2015.12.009 | Journal (article/letter/editorial) | | ultramafic xenoliths, Egmont Volcano (Mt. Taranaki) and comparisons with Ruapehu Volcano, North Island, New Zealand...ultramafic xenoliths, Egmont Volcano (Mt. Taranaki) and comparisons with Ruapehu Volcano, North Island, New Zealand...xenoliths, Egmont Volcano (Mt. Taranaki) and comparisons with Ruapehu 3 Volcano, North Island, New... 34 crust. The xenolith population of Egmont Volcano is more complex. It includes sedimentary, 35 ...and ultramafic igneous rocks. Gabbroic xenoliths (Group 1) are composed of 37 plagioclase, clinopyroxene |  | | Book (edition) | | commonly have several variants, such as Great Smoky Group, Great Smoky Conglomerate, Great Smoky Formation...If used on level 1, Term set options are: rock group (carbonate rocks, chemi¬ cally precipitated rocks...was adopted. Broader Term (BT, BX, BA, BZ) - A group of which the Term is a member or an area in which...Term (NT, NX, NA, NZ) - A specific mem¬ ber of a group which is represented by the Term or an area within...the Term is a member. For example: peridot BA olivine group BA nesosilicates BA orthosilicates BA silicates |  | | Book (edition) | | historic eruptions 251 and natural gas 130 13.11 Volcano prediction 257 9.10 Exploration for oil and...manuscripts, proofs etc, were (almost) kept by a group of some twenty or so geologists, any or many of...far-off past; the ex¬ including the geological group, the rate of increase traordinary surprises, contradicting...ask: What are the lavas made of? How does the volcano work and how is the heat generated? Where do the...the lavas and gases come from? When did the volcano first begin to erupt and when is it likely to erupt |  | | Book | | solar photosphere. This evidence favors the first group of models, requiring the formation of the sun and...recently by Anders and Ebihara (1982). Within this group of models, physical conditions may vary widely....solutions. Several reactions are possible among the olivine, pyroxene, metal, magnetite, and gas phases. Mueller... t Mg 2 Si04 + Olivine FeSi0 3 ~ MgSi0 3 Pyroxene Pyroxene + 1- Fe 2 Si0 4 Olivine (b) 36 S. K...Magnetite 3Fe Metal Gas (c) Olivine ~ Mg 2Si04 + Fe 2Si04 + t02 Olivine (d) Gas + 202~ Fe 3 0 4 Gas |  | | Book | | 472 474 477 480 480 484 485 15 Gold and platinum group element analysis 11 Other microbeam and surface...procedures is to predict the 'true' value from a group of individual measurements each containing random...obtain representative samples for a gold or platinum group element assay. For conventional silicate rock analysis...example, in some granite rocks), Au. Ag and platinum group elements (that occur almost exclusively as discrete...important in the analysis of gold and platinum group elements, and hence fire assay procedures that are |
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