نتایج جستجو برای: peraluminous ratio

تعداد نتایج: 502301  

Journal: :Mineralogy and petrology 2011
Jolanta Burda Urs Klötzli

In situ LA-MC-ICP-MS U-Pb zircon geochronology combined with cathodoluminescence imaging were carried out to determine protolith and metamorphic ages of orthogneisses from the Western Tatra Mountains (Central Western Carpathians). The metamorphic complex is subdivided into two units (the Lower Unit and the Upper Unit). Orthogneisses of the Lower Unit are mostly banded, fine- to medium-grained r...

Journal: :Minerals 2023

Midyan granites are located in the northern Arabian shield, northwest Saudi Arabia, terrain. They represent most northerly segment of Arabian–Nubian which comprises part East African orogeny. Consequently, understanding origin post-collisional and anorogenic magmatism terrain has significant geodynamic implications. mainly composed alkali feldspar granite, syenogranite, rarely granodiorite dior...

1997
James Demmel Jack J. Dongarra Jeremy Du Croz Anne Greenbaum Sven Hammarling Sven J. Hammarling Danny C. Sorensen

In this paper we describe block algorithms for the reduction of a real symmetric matrix to tridiagonal form and for the reduction of a general real matrix to either bidiagonal or Hessenberg form using Householder transformations. The approach is to aggregate the transformations and to apply them in a blocked fashion, thus achieving algorithms that are rich in matrix-matrix operations. These red...

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