Notes on Rock-forming Minerals (14) Anorthoclase Phenocrysts in Trachyte from Puu Anahulu, Hawaii Island

On Experimentally and Naturally Produced Shock Effects in Rock Forming Minerals

Wettability of Common Rock-forming Minerals in a Co2-brine System at Reservoir Conditions

Wettability plays a major role in subsurface fluid migration, however little empirical evidence besides qualitative relative permeability data in this context is known about the characteristics of carbon dioxide (CO2). Core analysts use several methods combined for use in the oil industry, including the USBM (U.S. Bureau of Mines) method and Amott test, supported visually by images from an envi...

Notes on the Red-billed Leiothrix in Hawaii

THE NAME JAPANESE HIL.L ROBIN often used in Hawaii for Leiothrix lutea (Scopoli) is an unfortunate misnomer, as is Pekin Nightingale, because the bird does not occur in the wild in Japan nor does it occur as far north as Shanghai, much less Pekin or Peipmg. Henshaw (1911: 63) recommended the introduction of this species into Hawaii as early as 1911 and noted that it lives to some extent on inse...

Geochemistry of the Cenozoic Volcanic Rocks of Ross Island and Vicinity, Antarctica

The Cenozoic volcanic rocks of Ross Island and vicinity, Antarctica, are surface flows, tuffs, breccias, and small intrusives. The prominent rock is basanitoid. Alkali-basalt magma reached the surface over an appreciable length of time and was differentiated to produce a rock series: basanitoid -. trachybasalt -, phonolite. The alkalic, silica-undersaturated rocks are part of a larger petrologi...

Precise Mössbauer milliprobe determination of ferric iron in rock-forming minerals and limitations of electron microprobe analysis

For estimations of P-T conditions of igneous and metamorphic rocks, Fe31 in coexisting minerals is either assumed to be zero or is calculated from electron microprobe analyses (EMPA) based upon stoichiometry and charge balance. Geothermobarometers that involve Fe21-Mg21 exchange can be significantly affected by either neglecting Fe31 or using incorrect values. Ratios of Fe31/SFe in garnet and c...