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Petrology And Geochemistry Of The Lazufre Volcanic Complex
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Book Synopsis Petrology and Geochemistry of the Lazufre Volcanic Complex by : Alicia Diane Wilder
Download or read book Petrology and Geochemistry of the Lazufre Volcanic Complex written by Alicia Diane Wilder and published by . This book was released on 2015 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lazufre volcanic complex is an area of active surface uplift (~25°14'S) situated between two potentially active Quaternary volcanic centers, Lastarria and Cordon del Azufre, in the Andean Central Volcanic Zone. Studies incorporated geologic field relationships, mineral compositions, textures, and whole rock geochemical and isotopic data to develop a petrogenetic model to identify the source area and petrogenetic processes for the Lazufre magmatic system. Whole rock K-Ar dates of lavas from Cordon del Azufre place the most recent eruptions at 0.6-0.3 Ma + or = 0.3 Ma. The most recent eruptive activity at Lastarria has been dated at ~0.5-0.1 Ma. Volcanic rocks erupted from Lazufre are andesites to dacites and conform to a medium- to high-K calc-alkaline suite. Typical phenocryst assemblage is plagioclase-orthopyroxene-clinopyroxene-amphibole. Magmatic inclusions and mafic glomerocryst are present in most lava flow samples. Plagioclase and pyroxene phenocrysts in all rocks exhibit textures consistent with thermal disequilibrium. Important geochemical characteristics of these rocks include negative correlations for Mg, Fe, Ca and increased K and Na with increasing SiO 2 suggesting limited crystal fractionation. High Cr and Ni in some of the more mafic samples indicate mingling of a more mafic magma with a large volume of more silicic magma. Large ion lithophile elements are elevated at higher SiO 2 content, suggesting assimilation of more felsic rocks. A low range in 206 Pb/204 Pb, 87 Sr/86 Sr, and 143 Nd/144 Nd suggest partial melting of lower mafic crust as the dominant process in the generation of Lazufre extrusive rocks and indicate that there was relatively little involvement of ancient or felsic continental crust in magmagenesis of the area. The original magma was modified by homogenization and small degrees of mixing and assimilation and fractional crystallization during differentiation through ascent of the mid and upper crust. The results from this study are significant in that a multitude of differentiation processes and magma sources, specifically, a considerable mafic lower crustal component were involved in the generation of Lazufre Volcanic Complex magmas in the Andean Central Volcanic Zone.
Book Synopsis The Petrology and Geochemistry of Diverse Crustal Xenoliths, Tatara-San Pedro Volcanic Complex, Chilean Andes by : Fidel Costa Rodriguez
Download or read book The Petrology and Geochemistry of Diverse Crustal Xenoliths, Tatara-San Pedro Volcanic Complex, Chilean Andes written by Fidel Costa Rodriguez and published by . This book was released on 2000 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deux groupes de xénolites ont été échantillonnés dans une lave dacitique du Volcán Holocène San Pedro (Andes du Chili ; 36°S, 71°51'W). Le groupe I est constituté de mélanorites à olivine qui sont co-magmatiques au volcanisme Holocène. Le groupe II consiste en des leuconorites à clinopyroxène et hornblende qui représentent des fragments du soubassement pré-quarternaire du volcan. Malgré leur différence d'âge et d'origine, ces deux groupes de xénolites ont enregistré des processus de migration de liquides riches en Si02 et H2O ou de fluides aqueux qui ont réagit avec l'olivine, le spinelle, les pyroxènes ou le plagioclase pour former d'importantes quantités de horblende (50%) et phlogopite (12%), expliquant ainsi l'abondance de hornblende dans les plutons gabbroïques calco-alcalins, comparée aux laves basaltiques ou basaltiques andésitiques présentes dans les zones de subduction.
Book Synopsis Plio-Quaternary Volcanism in Italy by : Angelo Peccerillo
Download or read book Plio-Quaternary Volcanism in Italy written by Angelo Peccerillo and published by Springer Science & Business Media. This book was released on 2005-12-12 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Central-Southern Italy and the Tyrrhenian Sea are the sites of extensive Plio-Quaternary magmatic activity. The rock compositions include crustal anatectic granites and rhyolites, tholeiitic, calc-alkaline, shoshonitic volcanics, and potassic to ultrapotassic and Na-alkaline volcanics. This very wide compositional variation makes Italian magmatism one of the most complex petrological issues, the understanding of which is a challenge for modern petrology and geochemistry. This book summarises the petrological, geochemical and volcanological characteristics of Italian Plio-Quaternary volcanism, and discusses petrogenetic hypotheses and possible geodynamics settings. The book is written for petrologists and geochemists, but fundamental geochemical information is well presented and the use of excessive jargon is avoided, making the book readable to a wide audience of Earth scientists.
Book Synopsis Petrology and Geochemistry of Some Igneous Intrusives in the Back River Volcanic Complex, District of MacKenzie, Northwest Territories by : D. Louise Beaumont
Download or read book Petrology and Geochemistry of Some Igneous Intrusives in the Back River Volcanic Complex, District of MacKenzie, Northwest Territories written by D. Louise Beaumont and published by . This book was released on 1978 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geochemistry and Geochronology of Middle Tertiary Volcanic Rocks of the Central Chiricahua Mountains, Southeast Arizona by : E. A. Du Bray
Download or read book Geochemistry and Geochronology of Middle Tertiary Volcanic Rocks of the Central Chiricahua Mountains, Southeast Arizona written by E. A. Du Bray and published by . This book was released on 2004 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology and Petrology of the Late Cenozoic Mount Baldy Trachytic Volcanic Complex, White Mountains Volcanic Field, Apache and Navajo Counties, Arizona by : Lorenza David Nealey
Download or read book Geology and Petrology of the Late Cenozoic Mount Baldy Trachytic Volcanic Complex, White Mountains Volcanic Field, Apache and Navajo Counties, Arizona written by Lorenza David Nealey and published by . This book was released on 1989 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Petrography and Petrology of Volcanic Rocks in the Mount Jefferson Area, High Cascade Range, Oregon by : Robert C. Greene
Download or read book Petrography and Petrology of Volcanic Rocks in the Mount Jefferson Area, High Cascade Range, Oregon written by Robert C. Greene and published by . This book was released on 1968 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Petrology and Geochemistry of the Northeastern Part of the Thirtynine Mile Volcanic Field, Colorado by : David Goldman
Download or read book Petrology and Geochemistry of the Northeastern Part of the Thirtynine Mile Volcanic Field, Colorado written by David Goldman and published by . This book was released on 1989 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volcanic, Geothermal, and Ore-forming Fluids by : Stuart Frank Simmons
Download or read book Volcanic, Geothermal, and Ore-forming Fluids written by Stuart Frank Simmons and published by . This book was released on 2003 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Petrology and Geochemistry of High Cascade Volcanics in Southern Washington by : Diane R. Smith
Download or read book The Petrology and Geochemistry of High Cascade Volcanics in Southern Washington written by Diane R. Smith and published by . This book was released on 1984 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Petrology and Geochemistry of Precaldera Magmas, Long Valley Caldera, Eastern California by : Roy Edward Chaudet
Download or read book The Petrology and Geochemistry of Precaldera Magmas, Long Valley Caldera, Eastern California written by Roy Edward Chaudet and published by . This book was released on 1986 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Geology, Petrography and Geochemistry of the Mt. Leura Volcanic Complex and the Lakes Bullenmerri and Gnotuk Volcanic Complex by : Cressida R.M. Jones
Download or read book The Geology, Petrography and Geochemistry of the Mt. Leura Volcanic Complex and the Lakes Bullenmerri and Gnotuk Volcanic Complex written by Cressida R.M. Jones and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology and Volcanic Petrology of the Lava Mountains, San Bernardino County, California by : George Irving Smith
Download or read book Geology and Volcanic Petrology of the Lava Mountains, San Bernardino County, California written by George Irving Smith and published by . This book was released on 1964 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of late Cenozoic volcanic rocks and a reconstruction of their probable origin in the light of chemical data and the geologic history of the area.
Book Synopsis Petrology and Geochemistry of the Rhobell Volcanic Complex : Amphibole-dominated Fractionation at an Early Ordovician Arc Volcano in North Wales by : B. P. Kokelaar
Download or read book Petrology and Geochemistry of the Rhobell Volcanic Complex : Amphibole-dominated Fractionation at an Early Ordovician Arc Volcano in North Wales written by B. P. Kokelaar and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Petrology and Geochemistry of Quaternary Volcanic Rocks from Makushin Volcano, Central Aleutian Arc by : Christopher Nye
Download or read book Petrology and Geochemistry of Quaternary Volcanic Rocks from Makushin Volcano, Central Aleutian Arc written by Christopher Nye and published by . This book was released on 1986* with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geology and Volcanic Petrology of the Lava Mountains, San Bernardino County, California by : George I. Smith
Download or read book Geology and Volcanic Petrology of the Lava Mountains, San Bernardino County, California written by George I. Smith and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Volcanology, Geochemistry and Petrology of the West-Central Mormon Mountain Volcanic Field, Northern Arizona by : F. Michael Conway
Download or read book Volcanology, Geochemistry and Petrology of the West-Central Mormon Mountain Volcanic Field, Northern Arizona written by F. Michael Conway and published by . This book was released on 1989 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
