Record Details
A model for the origin of calc-alkaline andesites at Crater Lake, Oregon
Klamath Waters Digital Library
| Field | Value |
|---|---|
| Title | A model for the origin of calc-alkaline andesites at Crater Lake, Oregon |
| Creator | Pinta, James |
| Date | 1981 2009-04-08 2009-05-11 |
| Subject | Andesite -- Inclusions -- Oregon -- Crater Lake; Geology, Structural; Electron probe microanalysis -- Oregon -- Crater Lake; Mazama, Mount (Oregon) -- Eruptions; |
| Description | ill. (some color), maps; Thesis (Ph.D.)--Pennsylvania State University; Includes bibliographic references (p. 118-124); iii ABSTRACT Andesites and other rock types of the calc-alkaline volcanic series associated with the Circum-Pacific orogenic zone commonly contain polymineralic crystal clots. Polymineralic crystal clots and host rock have been investigated petrographically and geochemically from a stratigraphic sequence of eight cone-building andesitic flows from Crater Lake, Oregon. In these andesites, the clots consist of essentially the same phases that occur as phenocrysts in the rocks -... V TABLE OF CONTENTS Page ABSTRACT iii LIST OF TABLES x LIST OF FIGURES xii ACKNOWLEDGEMENTS xiv CHAPTER 1, INTRODUCTION 1 Statement of the Problem 1 Purpose 4 Geologic Setting 5 Regional Setting 5 Tectonic Setting 7 Evolution of Crater Lake Caldera 7 The Sampled Section 10 CHAPTER 2, PETROGRAPHY 12 General Aspects 12 Modal Analysis 16 Procedure Used for Bulk Rock Modal Analysis 16 Groups Established 16 Plagioclase Phenocrysts 17 Orthopyroxene Phenocrysts... |
| Source | Originally published as: A model for the origin of calc-alkaline andesites at Crater Lake, Oregon; (1981); xvi, 208 leaves; 29 cm. |
| Contributor | Thesis (Ph.D.)--Pennsylvania State University Crater Lake National Park (Agency : U.S.); |
| Publisher | Oregon Institute of Technology. Library |
| Relation | Digital reproduction of: http://www.worldcat.org/oclc/299215966 Mode of access: Adobe Acrobat Reader |
| Type | text |
| Format | application/pdf; PDF file size: 23,732,224 bytes Master file format: image/tiff; master file size: 7,482,445,824 bytes; bit depth: 24; color mode: color; resolution: 600 dpi; capture hardware: Plustek OpticBook 3600; optimization software: Adobe Photoshop CS3 |
| Language | eng; |
| Rights | Digital image copyright 2008. Oregon Institute of Technology. All rights reserved. http://digitallib.oit.edu/cdm/copyright/collection/craterlake |
| Identifier | UOOL-27-Mar-2009-134 http://digitallib.oit.edu/cdm/ref/collection/craterlake/id/1266 |
