The sulfur isotope geochemistry of the Khibina and Lovozero agpaitic massifs provides an opportunity to understand role plume-lithosphere interaction processes responsible for Paleozoic alkaline igneous activity in north-eastern part Fennoscandian Shield. stable ?S analysis using triple collector ratio mass spectrometer (IRMS) has been carried out on pentlandite, chalcopyrite pyrite from nephel...

Post-collision Pliocene-Quaternary basaltic rocks outcrop in the Kerman Cenozoic Magmatic Arc (KCMA) to northwest and east of Shahr-e-Babak city. These porphyritic vesicular are composed essentially clinopyroxene, olivine, plagioclase. basalts display alkaline affinity negative Ta, Zr, Rb anomaly, but slightly Nb relative elements with similar compatibility, positive Ba, K, Sr suggesting their ...

A Robust tectonic reconstruction of the Philippine Sea Plate around ∼52 Ma is a prerequisite in understanding process subduction initiation and establishment Izu-Bonin-Mariana arc. This study investigates origins timing basin formation still poorly understood oldest part northern plate. We have established that andesitic magmatism form Northern volcanics widely distributed across this area. It ...

New zircon U-Pb-Hf-O isotope, whole rock geochemical and Sr-Nd-Pb isotope data of Variscan felsic to intermediate rocks from the Odenwald-Spessart basement, Mid-German Crystalline Zone, Germany are presented. Peraluminous, high-K calc-alkaline S-type granite in eastern Odenwald basement (Group 1 rocks) formed by partial melting lower crust at c. 425 Ma. Their composition indicates presence sedi...

Trace-element and Nd-Sr-Pb isotopic data for mafic lavas from the Mascarene island of Mauritius reveal that the shield-stage Older Series (with 143Nd/144Nd = 0.512827 to 0.512853, 87Sr/86Sr = 0.70412 to 0.70433, and 206Pb/204Pb = 18.771 to 19.024) is geochemically very similar to the shield-building lavas of the younger island of Réunion. The post-shield Intermediate and Younger Series lavas of...

The Fe isotope systematics of subducted lithologies are crucial for the understanding redox-dependent mass transfer in subducting slabs, with consequences compositions arc magmas and deep mantle. We investigated eclogites, metagabbros, paragneisses from Variscan Münchberg Massif to unravel whether their dominated by igneous/sedimentary protolith signature, low-temperature seawater alteration, o...

The isotopic data showed that there are two stages distinguished in the Cenozoic history of Darkhad depression volcanic activity, Late Oligocene initial stage (~28.0–26.6 Ma) and final Miocene – Early Pliocene (~5.8–4.2 Ma). It has been stated rocks only represented by trachybasalts; however, among final-stage basaltoids series shield-volcano hawaite-basanite-phonotephrite compex trachybasaltic...

At the south of Bardsir, Kerman province, Iran, southeastern part Urmia-Dokhtar magmatic arc (UDMA), a large number gabbroic intrusions are intruded into Eocene lava flows and pyroclastic rocks with form small stocks dykes. In this paper, geochemical variations, evolutions, origin these investigated. The studied characterized by fine-grained margins resulting from rapid cooling flow differentia...

We present in situ major element, trace and Sr–Nd isotope data of apatite from an alkaline–carbonatite intrusion the South Qinling Belt (SQB) to investigate their magma evolution mantle sources. The Shaxiongdong (SXD) complex consists predominantly early Paleozoic hornblendite, nepheline syenite, subordinate Triassic carbonatite. Apatites all lithologies are euhedral subhedral belong fluorapati...

Post-collisional voluminous silicic magmatism is represented in most orogens across the world form of large granodiorite batholiths and minor intermediate mafic intrusions, postdating 5-30 Ma age collisional paroxysm responsible main mountain building events. intrusions are acknowledged as a mechanism that contributes to long-term yet continental growth. The magmas forming batholiths, however, ...