The Bundelkhand-Aravalli craton is the most important lithotectonic unit in the central and western India where Paleoproterozoic Aravalli Supracrustal sequence has been deposited over an Archaean basement, the latter also known as the Banded Gneiss Complex (BGC). A NE-trending linear metasedimentary sequence, designated as the Jahazpur Belt occurs along the eastern fringe of the Aravalli Superg...

Volcanic eruptions are unpredictable phenomena that pose a challenge to crisis management, owing the fact contrasted eruptive styles (explosive versus effusive) exhibited at surface depend on unobservable deep processes occurring in reservoir and volcanic conduit. Constricting behaviour of magma during ascent, degassing particular, allows for clearer understanding relationships between petrolog...

Abstract Felsic tuff as a direct fallout deposit is known from one small area in the Kyrenia Range, north Cyprus, within deep-sea terrigenous turbidites. Nearby tuffaceous siltstones contain compositionally similar felsic volcanic rocks ( c. 5–10%), mixed with material. Sedimentary evidence indicates that was variable reworked locally, whereas are interpreted turbidites material derived Anatoli...

This paper reviews the literature on dyking as a mechanism of felsic magma extraction from a source and transport to shallower crustal levels, and review the recent literature suggesting a range of alternative mechanisms of magma migration in hot crustal zones which produce mesoscale pervasive granite sheet intrusions. Recent papers have strongly favoured dyking as the main mechanism controllin...

The Itapuranga alkali granite and Uruana quartz syenite are large K-rich EW-elongated intrusions, in the central part of the Neoproterozoic Brasília Belt, central Brazil. They are associated with Pireneus lineaments, which cut the regional NNW-SSE structures of the southern part of the belt. SHRIMP and conventional U-Pb data for the Itapuranga and Uruana intrusions indicate crystallization ages...

The petrography, as well as major and trace element (including rare earth element) compositions of 10 sandstone samples from the Late Proterozoic Buem Structural Unit, southeast Ghana, have been investigated to determine their provenance and tectonic setting. The petrographic analysis has revealed that the sandstones are quartz-rich and were primarily derived from granitic and metamorphic basem...

Abstract All models of the magmatic and plate tectonic processes that create continental crust predict presence a mafic lower crust. Earlier proposed crustal doubling in Tibet Himalayas by underthrusting Indian requires layer with high seismic P-wave velocity ( V p > 7.0 km/s) above Moho. Our new data demonstrates some thickest on Earth middle Lhasa Terrane has exceptionally low < 6.7 thr...