The activity of the Damavand volcano (Central Alborz, northern Iran) began 1.8 Ma ago and continued up to 7 ka BP. Although the volcanic suite is clearly of shoshonitic affinity, only two petrographic types can be distinguished in the studied lavas: (1) weakly differentiated absarokites (49 < %SiO2 < 51), scattered around the volcano but with a regional extension, (2) highly differentiated bana...

Late Jurassic NE-trending A-type granitoids are widespread in the Shihang belt, South China, though their petrogenesis and geodynamic settings remain controversial. The Guiping complex is located on southwest margin of belt. In this study, petrography, major trace element geochemistry, whole-rock Sr-Nd isotopes, zircon U-Pb geochronology were investigated. composed Fenghuangling Xishan plutons;...

Pyroxenite-peridotite sequences from the External Liguride (EL) Jurassic ophiolites (Northern Apennines, Italy) consist of portions fertile MORB mantle that were modified by deep melt infiltration and melt-peridotite reaction. They represent an excellent natural example a MORB-like veined including unmodified peridotite, pyroxenite layers metasomatized peridotite. We carried out spatially contr...

The petrogenesis of aluminous A-type granites is a contentious subject. Here, we focused on the North Kudi pluton in Western Kunlun orogen to investigate origin and magmatic processes responsible for generating granites. Samples from are metaluminous weakly peraluminous. K-feldspar granite samples characterized by high alkali Cl contents, HFSE concentrations FeO/MgO, low F content, negative Ba,...

This article presents the results of a study Late Mesozoic intrusive formations Omulevka terrane Verkhoyansk–Kolyma orogenic region. The research area covers Selennyakh block and territory adjacent to south. compositions rock-forming, accessory restitic minerals geochemical features rocks are considered. methods optical microscopy, microprobe, silicate spectral analyses were used. There followi...

Abstract The subduction initiation associated with the beginning of accretionary orogens has been thought to be related global plate reorganization. To characterize initial within western Central Asian Orogenic Belt, this integrated study focuses on Cambrian tholeiitic calc-alkaline plutons in Barleik-Mayile-Saleinuohai area West Junggar, NW China. Zircon U-Pb results felsic reveal a wide range...

The Neotethyan subduction and collision with the Asian, Indian, Australian plates is evidenced by a giant Andean-type arc system remarkable igneous belt along southwestern Eurasian margin. However, southward extent, cause, of poorly understood. Here, zircon U-Pb dating whole-rock geochemical study two groups Eocene (50−48 Ma) mafic intrusions from Tangse, North Sumatra, helps to unravel story. ...

Abstract We report Zn-isotope compositions of garnet, clinopyroxene, and whole rocks for 14 Type I 10 II eclogites from the Roberts Victor kimberlite (Kaapvaal Craton, South Africa) that were previously analyzed Mg-O isotopes. are protoliths highly metasomatized I. Garnet clinopyroxene in have δ66Zn 0.14‰ to 0.50‰ 0.29‰ 0.58‰, respectively; reconstructed whole-rock is 0.24‰ 0.54‰, which higher ...

The Indian Plate began drifting northward after the Gondwana breakup and collided with Eurasian during Early Cenozoic, resulting in consequential development of Himalayan–Tibetan Orogeny. Several microcontinents were rifted from amalgamated Plate, magmatism along continental margin. Abor volcanic rocks (AVRs) eastern Himalaya represent one such magmatism, emplacement mechanism, timing which is ...