A Type Granites Geochemical Characteristics

The barabazar granite was emplaced at.

A type granites geochemical characteristics. Petrographic characteristics of the barabazar granite under cross nicol a granite with interlocking crystals and perthite t exture. The ratio of gallium to aluminium is high as is the ratio of iron to magnesium. Petrographic features are representative of the chemical. There are lower levels of calcium and strontium.

S type granites are a category of granites first proposed by chappell white. Y yb ta and nb similar to the typical continent continent syn collisional granite. Pdf on jan 1 1987 j b. Geochemical characteristics discrimination and petrogenesis.

Western central and eastern belts. The peninsular malaysian granites are distributed into three parallel belts i e. New analyses of 131 samples of a type alkaline or anorogenic granites substantiate previously recognized chemical features namely high sio 2 na 2 o k 2 o fe mg ga al zr nb ga y and ce and low cao and sr. A type granites are mostly peraluminous and many of them have metasedimentary sources that previously underwent significant extraction of hydrous felsic melts.

Whalen and others published a type granites. S type granites are over saturated in aluminium with an asi index greater than 1 1 where asi al 2 o 3 cao na 2 o k 2 o in mol percent. Example from peninsular malaysia granites azman a ghani department of geology university of malaya 50603 kuala lumpur abstract. Geochemical characteristics and discrimination find read and cite all the research you need on researchgate.

The sarudik a type granites are further assigned. Geochemical characteristics of s and i type granites. Hf and nd isotopes. Geochemical and isotopic data suggest that the source of these a type granites is the mesoproterozoic continental crust without significant incorporation of mantle derived component and their formation is controlled by subsequent fractional crystallization.

They are recognized by a specific set of mineralogical geochemical textural and isotopic characteristics. Good discrimination can be obtained between a type granites and most orogenic granites m i and s types on plots employing ga al various major element ratios and y ce nb and zr. On the basis of the major trace element characteristics the initial nd isotope compositions and relict zircon u pb ages of the triassic granites and their spatial overlap with the. Good discrimination can be obtained between a type granites and most orogenic granites m i and s types on plots employing ga al various major element ratios and y ce nb and zr.

New analyses of 131 samples of a type alkaline or anorogenic granites substantiate previously recognized chemical features namely high sio2 na2o k2o fe mg ga al zr nb ga y and ce and low cao and sr.