Petrology of Nasu volcano

Mapping and Analyzing the Volcano-Petrology and Tectono-Seismicity Characteristics Along the Syrian Rift – NW the Arabian Plate

Fractals in petrology

A fractal (power-law) distribution is the only statistical distribution applicable to a scale-invariant process. One of the major problems in petrology is the distribution of trace elements in the Earth’s crust. Extreme values of this distribution result in ore deposits. There is accumulating observational evidence that tonnage–grade statistics of ore deposits are often fractal (powerlaw). Rayl...

Syndrome of the month Nasu-Hakola syndrome: polycystic lipomembranous

Presenile dementia of genetic origin is often attributed to Alzheimer's disease. This disorder remains by far the commonest cause of early dementia. Pick disease and prion protein disorders are usually discussed in the differential diagnosis. We review here Nasu-Hakola syndrome (OMIM 221770), another unusual cause of presenile intellectual deterioration, in which neurological impairment occurs ...

Petrology and geochemistry of lavas

“This continuity disappears, however, if one considers individual parts of the [Central American] chain and examines separate groups of volcanoes within a restricted volcanic field. It then becomes apparent that the continuity of the province as a whole is the result of grouping excessively large segments of the chain.” A.R. McBirney: Compositional variations in Cenozoic calcalkaline suites of ...

Petrology and Stratigraphic Setting

anomolously low A1203, low Ti02 and are enriched in chromium and nick~A We present petrographic and chemical c ata on the Kamloops Lake picritic tmalts as we1 I as the stratigraphic setting for thwe ultramafic lavas. Age constraints derive From field relationships, Mineral chemistry indicates th 31 these ultramafic rocks represent mantle-deri.ed material which has undergone: minimal differentia...