[1] Analysis of the compositions of crystals and melt inclusions from a suite of 40 gabbroic and wehrlitic nodules in a single eruptive body provides a record of concurrent mixing and crystallization of melts under NE Iceland. The crystals in the nodules have a similar range of compositions to those found as phenocrysts in the flow, and many of the nodules may have been generated by crystalliza...

Introduction: Dhofar 1428 is a lunar feldspathic breccia found in 2006. Bunch et al. [1] briefly described mineral chemistry of Dhofar 1428. Korotev and Zeigler [2] analyzed its bulk FeO and Sm compositions. Here, we report such detailed data for Dhofar 1428. Results and Discussion: Dhofar 1428 has a distinct breccia texture with numerous fragments of rock, mineral, and glass all welded by a gl...

Abstract Constraints on mantle heterogeneity are important for understanding geochemical differentiation and recycling in Earth’s interior. Alkali basalts of particular interest this context due to the clear signatures recycled components that they yield. Previous studies have focused more oceanic than continental mafic rocks because chemical isotopic characteristics latter often modified by cr...

We report a combined conventional Mössbauer and synchrotron Nuclear Resonant Inelastic X-ray Scattering (NRIXS) study of series basalt, andesite, dacite, rhyolite glasses at temperatures ranging from 5 to 1223 K. These were synthesized under controlled oxygen fugacities span wide range Fe3+/Fetot ratios. As expected theory, we find that in these glasses, the inverse Lamb-Mössbauer factor (the r...

Geochemical, isotopic and age constraints support a comagmatic origin for Ghuweir Mafics and the Feinan A-type granites. The two rocks types, named collectively in this paper as the Feinan Ghuweir Magmatic Suite (FGMS), formed between 556 and 572Ma ago according to Rb–Sr whole-rock dating. FGMS has low Sr initial ratios, which preclude a significant contribution of much older crust in the magma...

The orientation, petrography and geochemistry of numerous basaltic dykes between Kiama Gerroa were investigated in this study. Geochemical analysis shows that the range from sub-alkaline to alkaline composition. fit into three distinct geochemical groups, with most being transitional alkali basalts foidites, followed by lastly andesites/basaltic andesites. We suggest intrusive episodes occurred...

Abstract Recycling of material at subduction zones has fundamental implications for melt composition and mantle rheology. Ocean island basalts (OIBs) sample parts the from variable depths that have been diversely affected by zone processes materials, including subducted slab, metasomatising melts fluids. Resultant geochemical differences are preserved a variety scales inclusions to whole rocks,...