This paper applies magnetic fabric analyses to plutons of the East Pacific continental arc. Continental arc magmatism is strongly episodic, with voluminous granitic magma addition occurring during discrete high-flux events (‘flare-ups’). The cause these flare-ups debated, variously invoking tectonic, mantle, or crustal controls. To understand how syn-magmatic strain history changes a flare-up, ...

the lut block (eastern iran) extends over 900 km in a north-south direction and is only 200 km wide in an east-west direction. it is confined by the nayband fault and shotori range on the west. the eastern edge is bordered by the sistan suture zone and nehbandan fault. the northern termination of lut block is the depression of kavir-e-namak and the great kavir fault. the makran arc, including t...

Extensive intraplate volcanism in the East Asia regions, including Dokdo and Ulleungdo (DU), occurred due to extensional stress field during Cenozoic era. However, origin of magmatism is still controversial. Here we report new results helium isotopes olivine clinopyroxene phenocrysts as well major trace element compositions from DU basalts order determine magmas provide insights into mantle dyn...

The rise of the Isthmus of Panama, linked to a number of climatic, paleoceanographic, and biological events, has been studied mostly from indirect, often distal, geochemical and biotic evidence. We have upgraded existing geologic mapping in central Panama with more than 2000 fi eld stations, over 40 petrographic analyses, and more than 30 new geochronological and thermo chrono logical analy ses...

The chemistry of primitive arc rocks provides a window into compositional variability in the mantle wedge, as well slab-derived inputs to subduction-related magmatism. However, long-term cycling elements between Earth's internal and external reservoirs, key unknown is importance retaining mobile within subduction system, through metasomatism mantle. To address these questions, we have analysed ...

The re cord of arc magmatism is wide spread in the Ca na dian Cor dil lera (e.g., Armstrong, 1988; Woodsworth et al., 1991), par tic u larly in the Quesnel and Stikine ter ranes, where plutonic rocks re lated to Me so zoic arcs host most of the por phyry-style min eral de pos its in the Cor dil lera (An der son, 1985; Woodsworth et al., 1991; McMillan et al., 1995; Fig 1). Iso to pic char ac te...

Simultaneous acquisition of detrital zircon Pb-Pb ages and trace element abundances from grains collected across the Indian craton, spanning ~3 b.y., reveals prominent shifts in Eu/ Eu* and light and middle to heavy rare earth element ratios. These shifts correspond to a ca. 3.0–2.2 Ga interval of crustal thickening during Indian craton formation, followed by a period wherein arc magmatism occu...

Abstract Arc magmatism is thought to be driven by peridotite melting in the mantle wedge. Yet pyroxenites are ubiquitous region beneath magmatic arcs. Because they typically have lower solidi temperatures and higher melt productivities compared peridotite, likely play a significant role magma generation. Here, we use Zn/Fe ratios of global database Pliocene–Holocene primitive arc magmas show th...

The formation of continental crust in the Mongolia-Transbaikalia region is researched to identify mechanisms interactions between and mantle development Neoarchean, Proterozoic Paleozoic magmatic sedimentary complexes study area. Using results his own studies conducted for many years other published data on this vast Central Asia, author have analysed compositions, ages conditions Karelian, Bai...