Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Anne V. McGuire"'
Autor:
Heike Rothe, Richard L. Hervig, Michael Wiedenbeck, Edward S. Grew, Carl A. Francis, Kurt M. Ferguson, Jeremy S. Delaney, Rick L. Paul, Martin G. Yates, Laura R. Cross, David Robertson, William P. Leeman, John Husler, M. Darby Dyar, Anne V. McGuire, Dieter Rhede, Ian J. Richards, Charles V. Guidotti, John M. Hughes
Publikováno v:
Geostandards and Geoanalytical Research. 25:441-463
The quantitative determination of light element concentrations in geological specimens represents a major analytical challenge as the electron probe is generally not suited to this task. With the development of new in situ analytical techniques, and
Autor:
Samuel B. Mukasa, Anne V. McGuire
Publikováno v:
Contributions to Mineralogy and Petrology. 128:52-65
Upper mantle xenoliths from Wikieup, AZ, provide abundant evidence for magmatic modification of the uppermost mantle beneath the Transition Zone between the Colorado Plateau and the southern Basin and Range province. Upper mantle lithologies in this
Autor:
Anne V. McGuire, H. G. Wilshire
Publikováno v:
Contributions to Mineralogy and Petrology. 123:358-374
Xenoliths of lower crustal and upper mantle rocks from the Cima volcanic field (CVF) commonly contain glass pockets, veins, and planar trains of glass and/or fluid inclusions in primary minerals. Glass pockets occupy spaces formerly occupied by prima
Autor:
Anne V. McGuire
Publikováno v:
Journal of Geophysical Research: Solid Earth. 99:24263-24273
Gabbro xenoliths in Tertiary alkali olivine basalts near Wikieup, Arizona provide samples from the crust-mantle boundary beneath the Basin and Range to Colorado Plateau transition zone. The xenoliths consist of two pyroxenes+plagioclase+spinel (gabbr
Autor:
Anne V. McGuire, Robert J. Stern
Publikováno v:
Contributions to Mineralogy and Petrology. 114:395-408
Mafic and intermediate granulite xenoliths, collected from Cenozoic alkali basalts, provide samples of the lower crust in western Saudi Arabia. The xenoliths are metaigneous two-pyroxene and garnet granulites. Mineral and whole rock compositions are
Publikováno v:
Geochimica et Cosmochimica Acta. 56:2579-2586
Redox characteristics and crystal chemical changes caused by Fe-Ti metasomatism are evident in an anhydrous composite nodule from Kilboume Hole, New Mexico. Data collected using electron microprobe and Mossbauer spectroscopy show that olivines have n
Publikováno v:
Contributions to Mineralogy and Petrology. 109:252-264
Examination of Fe3+ in metasomatized spinel peridotite xenoliths reveals new information about metasomatic redox processes. Composite xenoliths from Dish Hill, California possess remnants of magmatic dikes which were the sources of the silicate fluid
Autor:
Anne V. McGuire, M. Darby Dyar
Publikováno v:
Proceedings, annual meeting, Electron Microscopy Society of America. 50:1742-1743
One shortfall of electron microprobe analysis is the inability of x-ray spectroscopic methods to distinguish multiple valence states of atoms. In geologic materials, many elements (eg. Fe, Ti, Cr, Mn, Cu, Eu) may exhibit multiple valence states and t
Publikováno v:
Geology. 20:565
Hornblende megacrysts from basaltic flows in several locations have been studied by means of the electron microprobe, Mossbauer spectroscopy, uranium extraction techniques, and mass spectrometry to define the interrelations between the concentrations
Autor:
Akihiko Hashimoto, Anne V McGuire
Publikováno v:
Geochimica et Cosmochimica Acta. 53:1123-1133
The mineral and bulk compositions in the three zones of the fine-grained Ca-Al-rich inclusion in the Allende meteorite are studied. Mineral analyses for the inclusions are presented and the principle mineral composition for the three zones of the inc