High Ba Sr Granite

The enrichment of ba 465 980ppm relative to sr 110 200ppm and the high k 2 o 1 85 6 33 suggest a pelitic parent.

High ba sr granite.

The continental slab break off was the mechanism associated with their origin. A classic post collisional high ba sr granite in the riacho do pontal fold belt ne brazil june 2016 brazilian journal. A variety of high ba sr granites and syenites is intruded into the caledonian terrane of the northern highlands of scotland. In this case the orkney granite complex dates transcurrent faulting to 432 429 ma coeval with the 431 429 ma moine thrust.

Quantitative major element trace element radiogenic and stable isotope modelling is consistent with early fractionation of clinopyroxene and biotite. In this contribution. View academics in high ba sr granite on academia edu. Geochemistry of the serra das melancias pluton in the serra da aldeia suite.

It consists of three granitoid facies tonalite granodiorite granite that are locally associated with large enclaves of coeval mafic appinite. This is manifest in high ba sr and light ree abundances and incompatible element ratios in the derived magmas directly comparable with those of high ba sr granitoids and related rocks. Highlights we investigate two miocene plutons in western tibetan plateau. These potassic high ba sr granites record important information on the growth and evolution of continental crust in the eastern block of the ncc particularly in the tsgt where typical greenstones crop out e g zhao et al 2001 polat et al 2006.

They show an association of granite and syenite. Volumetrically rather small the plutons display a considerable range. Ach uaine hybrid appinites represent a rare example of lamprophyric magmas that were demonstrably exactly contemporaneous with felsic differentiates preserved within a suite of minor hypabyssal. They were derived by partial melting of a slab melt hybridized lithospheric mantle.

The rogart pluton is a typical example of high ba sr granitic magmatism emplaced in northern scotland towards the end of the caledonian orogeny. Implications for lamprophyre fractionation and high ba sr granite genesis fowler m. The overall range of compositions is therefore extreme with mgo from 11 6 to 0 1 wt sio2 from 47. Several show an affinity to high ba sr granite yang et al 2008.

They are shoshonitic with very high ba up to 9100 ppm and sr up to 3100 ppm concentrations.