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 ...

Abstract The composition of spinel lherzolite xenolith KLB-1 from the Kilbourne Hole volcanic crater, United States, which is close to Earth’s primitive mantle, was used for thermodynamic modeling phase relations in Na 2 O–CaO–FeO–MgO–Al O 3 –SiO system (NCFMAS) using Perple_X software package temperature range 900–2000 °C and pressures 0.0001–30 GPa. calculated diagram good agreement with publ...

Integrated spectroscopic analyses and synchrotron X-ray microdiffraction investigations provide insights into the long-term reactivity of volcanic aggregate components calcium-aluminum-silicate-hydrate (C-A-S-H) binder in mortar samples from robust concrete sepulchral corridor Tomb Caecilia Metella, 1st C BCE, Rome. The results innovative micrometer-scale analytical maps indicate that Pozzolane...

exact petrography and mineral chemistry investigations of pristine and altered rocks of the post-eocene panj-kuh pluton show thatsubsequent to emplacement and crystallization, rocks were subjected to two secondary composition equivalents, sodic-calcic andpotassic alterations, respectively. fresh rocks have syenitic composition and contain plagioclase (labradorite), k-feldspar, magmaticdiopside,...

Abstract Water content plays a significant role in magma genesis, ascent rate, and, ultimately, the style and intensity of volcanic eruptions, due to its control on density, viscosity melting behaviour silicate melts. A reliable method for determining pre-eruptive magmatic water is use phenocrysts nominally anhydrous minerals (NAMs) which can preserve as hydrogen configurations structural defec...

The chemical variation of clinopyroxene phenocrysts from the trachybasaltic lavas of Etna volcano is described. The phenocrysts show a limited, but distinct trend in chemical variation from calcic-augite in the hawaiites to augite in the benmoreites. The trend of this variation is unusual, being one of Mg-enrichment with differentiation of the magma. Ca shows a steady decrease in the clinopyrox...

[1] Polycrystal elasticity of the unquenchable MgSiO3 high-pressure clinoenstatite has been measured using ultrasonic interferometry in conjunction with in-situ X-ray diffraction and imaging techniques within its stability field in a large volume multi-anvil apparatus for the first time. At 6.5 GPa, we obtained @KS/@P = 5.6(3), @G/@P = 1.5(1), @KS/@T = 0.017(1) GPa K 1 and (@G/@T) = 0.015(1) GP...

The Eocene basaltic extrusions in the Paso de Indios region (Chubut-Argentina) are one manifestation of extensional tectonism active margin South America during Cenozoic. Ultramafic xenoliths embedded these volcanics mainly harzburgites and lherzolites with subordinate pyroxenites, estimated equilibrium temperatures ranging from 853 ± 15 to 1057 32 °C pressures spinel stability field. Geochemic...

Constraining the pre-eruptive processes that modulate chemical evolution of erupted magmas is a challenge. An opportunity to investigate this issue offered by interrogation crystals carried in lavas. Here, we employ clinopyroxene from back-arc lavas order identify driving basalt andesite magma within transcrustal plumbing system. The assembled archive reveals mantle melts injected at crust-mant...