Download or read book Stratigraphy Petrology and Geochemistry of the Spurr Volcanic Complex Eastern Aleutian Arc Alaska Appendix for Geothermal Fluid Chemistry written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Spurr Volcanic Complex (SVC) is a calcalkaline, medium-K, sequence of andesites erupted over the last quarter of a million years by the easternmost currently active volcanic center in the Aleutian Arc. The ancestral Mt. Spurr was built mostly of andesites of uniform composition (58 to 60% SiO2), although andesite production was episodically interrupted by the introduction of new batches of more mafic magma. Near the end of the Pleistocene the ancestral Mt. Spurr underwent Bezyianny-type avalanche caldera formation, resulting in the production of a volcanic debris avalanche with overlying ashflows. Immediately afterward, a large dome (the present Mt. Spurr) was emplaced in the caldera. Both the ashflows and dome are made of acid andesite more silicic than any analyzed lavas from the ancestral Mt. Spurr (60 to 63% SiO2), yet contain olivine and amphibole xenocrysts derived from more mafic magma. The mafic magma (53 to 57% SiO2) erupted during and after dome emplacement, forming proto-Crater Peak and Crater Peak. Hybrid pyroclastic flows and lavas were also produced. Proto-Crater Peak underwent glacial dissection prior to the formation of Crater Peak in approximately the same location. Appendices II through VIII contain a summary of mineral compositions; Appendix I contains geochemical data. Appendix IX by R.J. Motyka and C.J. Nye describes the chemistry of geothermal fluids. 78 refs., 16 figs., 3 tabs.

Download or read book Stratigraphy Petrology and Geochemistry of the Spurr Volcanic Complex Eastern Aleutian Arc Alaska written by Christopher Nye and published by . This book was released on 1987 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.

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Download or read book Petrology and Geochemistry of Okmok and Wrangell Volcanoes Alaska written by Christopher John Nye and published by . This book was released on 1983 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Stratigraphy Structural Relations Petrology and Chemical Correlations of the Kilgore Volcanic Complex in Southeastern Idaho written by Patricia A. Thornton and published by . This book was released on 1988 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geothermal Resources of the Aleutian Arc written by Roman J. Motyka and published by . This book was released on 1993 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Igneous Petrology and Geochemistry of Northern Akutan Island Alaska written by Jay David Romick and published by . This book was released on 1991 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Petrography Chemistry and Geologic History of Yantarni Volcano Aleutian Volcanic Arc Alaska written by J. R. Riehle and published by . This book was released on 1987 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy and General Geology of the McCarthy C 5 Quadrangle Alaska written by Edward Malcolm MacKevett and published by . This book was released on 1971 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Descriptions of the rocks of a quadrangle famous for its copper mines.

Download or read book Stratigraphy Structure and Graptolites of an Ordovician and Silurian Sequence in the Terra Cotta Mountains Alaska Range Alaska written by Michael Churkin and published by . This book was released on 1996 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy and Depositional Environment of the Dutch Harbor Member of the Unalaska Formation Unalaska Island Alaska written by Stephen M. Lankford and published by . This book was released on 1979 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book West to East Stratigraphic Correlation Section Point Barrow to Ignek Valley Arctic North Slope Alaska written by Alaska Geological Society. North Slope Stratigraphic Committee Year 1970-71 and published by . This book was released on 1971 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphic Framework of the Alaska Peninsula written by Robert L. Detterman and published by . This book was released on 1996 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy Petrology and Geochemistry of Upper Triassic Rocks from the Pingston and McKinley Terranes Central Alaska Range written by Wyatt G. Gilbert and published by . This book was released on 1984 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphy and Structure of the Ekokpuk Creek Area North central Brooks Range Alaska written by Willis Howard Nelson and published by . This book was released on 1990 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: