Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"CHROMITES"”.
-
The discovery of baddeleyite (ZrO2) and chrome spinel in the basal Rooiberg Group of the 2.057 Ga Bushveld Complex, South Africa: Implications for the impact and igneous scenarios for the petrogenesis of the Rooiberg Group.
… The size, shape, chemistry and configuration of chromites in the Basal Rhyolite also suggest that they once existed in the interstices to olivine or pyroxene in a mafic cumulate prior to entrainment. Since no cumulates are known to exist underneath the Bushveld Complex, the parent lithology of …
-
Petrology of the Sutherland Commonage melilitite intrusives
… levels. It is inferred from the chemistry of chromites and magnetites that the magma in the ring dyke was more evolved than those in the sill complex and that very oxidising conditions prevailed in the grey melilitite during the crystallisation of magnetite in this intrusive type. The high fO₂ …
-
The geologic and tectonic evolution of the Pan-African/Mozambique Belt in East Africa
… which developed in a back-arc setting. The chromites of Baragoi and Moyale have high Cr<sub>2</sub>O<sub>3</sub> which follow an ophiolitic trend. <br></br><br></br> Major and trace element data for granitoids from W Ethiopia, S Ethiopia- NE Kenya and central Kenya indicate three …
-
A detailed investigation into diamond-bearing xenoliths from Newlands Kimberlite, South Africa
… specimens have high-Cr calcic compositions. The chromites are Cr-rich, Ti-depleted, whilst the solitary olivine is Fo 93 .4. The sub-calcic garnets display a narrow range of trace element signatures, depleted in Zr, Y, Ga, and Ti, whilst Sr and LREE's are enriched. The [REE] 0 patterns are all …
-
ΟΦΙΟΛΙΘΟΙ ΤΗΣ ΝΗΣΟΥ ΚΡΗΤΗΣ
ΟΙ ΟΦΙΟΛΙΘΟΙ ΤΗΣ ΝΗΣΟΥ ΚΡΗΤΗΣ ΑΠΑΝΤΟΥΝ ΩΣ ΤΕΜΑΧΗ ΕΝΟΣ ΔΙΑΜΕΛΙΣΜΟΥ ΟΦΙΟΛΙΘΙΚΟΥ ΣΥΜΠΛΕΓΜΑΤΟΣ, ΣΤΙΣ ΠΕΡΙΟΧΕΣ ΑΝΩΓΕΙΑ, ΣΠΗΛΙ, ΜΙΑΜΟΥ, ΚΑΜΑΡΕΣ, ΒΙΑΝΝΟ. ΚΑΤΑΛΑΜΒΑΝΟΥΝ ΕΚΤΑΣΗ 35 ΚΜ2 ΠΕΡΙΠΟΥ ΚΑΙ ΕΧΟΥΝ ΠΑΧΟΣ 300 Μ ΠΕΡΙΠΟΥ, ΕΙΝΑΙ ΔΕ ΑΝΩΙΟΥΡΑΣΙΚΗΣ ΗΛΙΚΙΑΣ. ΣΤΟ ΟΦΙΟΛΙΘΙΚΟ ΣΥΜΠΛΕΓΜΑ ΑΠΑΝΤΟΥΝ: 1) ΧΑΡΖΒΟΥΡΓΙΤΕΣ …