The sediments on the banks of Shatt al-Arab and Al-Basrah have been studied to find out their mineralogical variation. Twenty-two samples were collected from depths 20 cm recent Al-Arab Rivers banks, with approximately equal distances between them, grain size analysis was conducted, selected prepared for X-ray diffraction, heavy light minerals analysis. result showed that silt loam texture is d...

In previous papers in this series, a model that uses available elastic, structural, and spectroscopic data on minerals has been used to predict the thermodynamic functions Cv (heat capacity), S (entropy), E (internal energy), and F (Helmholtz free energy). In this paper, four applications to problems of current geochemical and geophysical interest are presented: (1) interpretation of complex tr...

Common naturally occurring orthosilicates can be grouped into those in which the major non-tetrahedral cations are (1) FeII and/or Mg, plus or minus Al (olivine, pyralspite garnets, staurolite); (2) Al (Al2SiO5 polymorphs), or (3) Zr. Feand Mg-bearing orthosilicates have the weakest bonds between non-tetrahedral cations and structural oxygen (M-O bonds), and zircon the strongest, with Al-O bond...

Abstract Reconstructed whole-rock (RWR) and mineral major- trace-element compositions, as well new oxygen isotope data, for 22 mantle eclogite xenoliths from the Catoca pipe (Kasai Craton) were used to constrain their genesis evolution. On basis of mineralogical major-element eclogites can be divided into three groups: high-alumina (high-Al) (kyanite-bearing), low-magnesian (low-Mg#), high-magn...

Mineralogical and petrographic studies require analytical methods capable to underline the repartition of major trace elements within geological samples. The EPMA (Electron Probe Micro Analyzer) conventional method used for such investigation, but on restrictive zones, is verge be reached by μLIBS (micro Laser-Induced Breakdown Spectroscopy) μXRF X-Ray Fluorescence) techniques allowing elementa...

The Belomorian Province of the Fennoscandian Shield exposes numerous Precambrian eclogites, which makes it significant for study early tectonic processes. age these eclogites has been discussed more than 15 years and regarded as either Archean or Paleoproterozoic. In Kuru-Vaara quarry within northern Province, eclogitic assemblage is preserved in concordant mafic boudins felsic gneisses a parti...

In the present study, we unveil real significance of mylonitic reworking polymetamorphic crystalline basement in Serre Massif Calabria (Southern Italy). We use a multidisciplinary approach to comprehend structural, microstructural and petrologic changes that occurred along a, so far, not much considered shear zone affecting Variscan lower crustal rocks. It was never before studied detail, altho...

Needle-shaped rutile inclusions occur in garnet within the quartz-eclogite at Mt. Gongen Sanbagawa belt, central Shikoku. They are approximately 5–25 µm along long axis and typically oriented three directions, each intersecting 120°. This indicates that needle-shaped is a lamella exsolved from garnet. Garnet with needle-rutile restricted to quartz-poor domain of quartz eclogite sample, which co...