Abstract Chemical diversity in convergent margin magmas is a product of igneous differentiation crustal hot zones, vertically extensive regions characterised by low-volume (<20%) mobile melt phase dispersed crystal-rich mush. reaction between buoyant, percolating melts and the surrounding mush leads to chemical buffering local mineral assemblage. Where this assemblage has low thermodynam...

Abstract Basalts and basaltic rocks are the most abundant igneous on earth their petrologic geochemical studies have formed our knowledge base thermal structure composition of mantle with which we developed workable models chemical differentiation earth. All this would not been possible without innovative painstaking experimental petrology peridotite melting, magma generation evolution largely ...

The Seve Nappe Complex is a subduction-related high-grade metamorphic unit that was emplaced onto the margin of Baltica during Caledonian orogenesis. In this paper, tectonometamorphic evolution Lower in Scandinavian Caledonides characterized with help continuous Collisional Orogeny (COSC-1) drill core, using combination various P–T estimation techniques based on garnet–quartz mineral pairs (qua...

Abstract Hybrid dacite magmas from Taápaca volcano in the Central Andean Volcanic Zone (18°S, northern Chile) contain sanidine crystals of unusual size (1–12 cm) and abundant mafic enclaves variable composition throughout entire eruptive history (1·5 Ma to recent) volcano. They are rich mineral inclusions strongly zoned Ba with distinct growth bands separated by resorption interfaces. Resorptio...

[1] Currie and Hyndman [2006] documented the evidence that the majority of continental back arcs are uniformly hot with thin lithospheres over regional extents of hundreds of kilometers, even if where is no thermally significant extension. Using a number of independent observations, we showed that eight such current subduction zones have similar thermal regimes, with Moho temperatures greater t...

We summarize our results from Bhutan and interpret the Greater Himalaya Sequence (GHS) of Bhutan, together with a portion of the underlying Lesser Himalaya Sequence, in the context of recently published channel flow models. For the GHS rocks now exposed in Bhutan the depth for beginning of muscovite dehydration melting (approximately 7508C at 11 kbar) and associated weakening of these rocks is ...

introduction khoy ophiolite at the global scale is in the middle part of the alp-himalaya orogenic belt and it is extended over 3900 km2 which indicates remnant neotethys oceanic lithosphere in the mesozoic era (kananian et al., 2010). in this paper, in addition to a review of previous investigations about khoy ophiolite, we will try to determine the nature and kind of minerals, origin and part...