The magmatic and magmatic-hydrothermal evolution of felsic igneous rocks as seen through Nb-Ta geochemical fractionation, with implications for the origins of rare …

C Ballouard, M Massuyeau, MA Elburg, S Tappe… - Earth-Science …, 2020‏ - Elsevier
Abstract Despite Nb and Ta being considered as 'geochemical twins', most Ta mineral
deposits are associated with muscovite-bearing peraluminous granites and related …

[كتاب][B] Igneous petrogenesis

M Wilson - 1989‏ - Springer
A map of the ocean basins (Fig. 5.1) shows that their most conspicuous topographic feature
is the system of mid-oceanic ridges, the crests of which rise on average 1000-3000 m above …

Relationships between mafic and peralkaline silicic magmatism in continental rift settings: a petrological, geochemical and isotopic study of the Gedemsa volcano …

A Peccerillo, MR Barberio, G Yirgu, D Ayalew… - Journal of …, 2003‏ - academic.oup.com
Petrological and geochemical data are reported for basalts and silicic peralkaline rocks from
the Quaternary Gedemsa volcano, northern Ethiopian rift, with the aim of discussing the …

[كتاب][B] Granitoid rocks

DB Clarke - 1992‏ - books.google.com
Page 1 Granitoid Rocks DB Clarke BSc, MA, PhD Department of Earth Sciences Dalhousie
University Halifax Nova Scotia Canada kluwer the language of science Page 2 Page 3 …

An evaluation of the Rb vs.(Y+ Nb) discrimination diagram to infer tectonic setting of silicic igneous rocks

HJ Förster, G Tischendorf, RB Trumbull - Lithos, 1997‏ - Elsevier
The most commonly used tectonic discrimination diagrams for granites were introduced by
Pearce et al.[Pearce, JA, Harris, NBW, Tindle, AG, 1984. Trace element discrimination …

Gamma rays, x-rays and stone tools: some recent advances in archaeological geochemistry

MS Shackley - Journal of Archaeological Science, 1998‏ - Elsevier
Recent advances in instrumental technology are providing archaeologists with enticing
opportunities in the chemical analysis of geological materials. These advances, however …

Zircon saturation in silicate melts: a new and improved model for aluminous and alkaline melts

F Gervasoni, S Klemme, ERV Rocha-Júnior… - … to Mineralogy and …, 2016‏ - Springer
The importance of zircon in geochemical and geochronological studies, and its presence not
only in aluminous but also in alkaline rocks, prompted us to think about a new zircon …

A-type granites and related rocks: petrogenesis and classification

AV Grebennikov - Russian Geology and Geophysics, 2014‏ - Elsevier
The problems of identification of A-type granitoids are analyzed. These rocks occur in
different geodynamic settings. Owing to their mantle nature, they show distinct REE …

Trace-element partitioning in pantellerites and trachytes

GA Mahood, JA Stimac - Geochimica et Cosmochimica Acta, 1990‏ - Elsevier
In order to investigate the effect of increasing melt peralkalinity on partitioning, partition
coefficients have been determined using neutron activation analyses of coexisting …

Hf isotopes in zircon reveal contrasting sources and crystallization histories for alkaline to peralkaline granites of Temora, southeastern Australia

AIS Kemp, RJ Wormald, MJ Whitehouse… - …, 2005‏ - pubs.geoscienceworld.org
Peralkaline granites exhibit the hallmark features of A-type igneous rocks, but strongly
differentiated chemistry and intense hydrothermal alteration camouflage their ultimate …