منابع مشابه
Organic Petrology applied to materials and coal by-products characterization
Optical microscopy is a very unique tool to find out about the structural order of carbonaceous materials and coal by-products. It has two main utilization ways as an instrument to distinguish and quantify different phases in a polished surface and as a record of the reflectance of a given material. Using one or both capabilities there are significant contributions to different aspects of coal ...
متن کاملFractals 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...
متن کاملPetrology 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 ...
متن کاملPetrology 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...
متن کاملMidocean Ridge Geochemistry and Petrology
The most volcanically active regions of our planet are concentrated along the axes of the globe, encircling midocean ridges. These undersea mountain ranges, and most of the oceanic crust, result from the complex interplay between magmatic (i.e., eruptions of lavas on the surface and intrusion of magma at depth) and tectonic (i.e., faulting, thrusting, and rifting of the solid portions of the ou...
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ژورنال
عنوان ژورنال: Journal of the Fuel Society of Japan
سال: 1958
ISSN: 0369-3775,2185-226X
DOI: 10.3775/jie.37.610