Chromite occurrences in Iraqi Zagros
Ultrabasic rocks (harzburgite, wherlite and dunite) occurring in the northeastern Iraqi Zagros thrust zone, contain massive podiform, schliern and accessory type chromites. Aluminium and chromium-rich chromites have been distinguished in the ophiolitic complexes of Mawat and Penjwin Mountains. The f...
Elmentve itt :
| Szerző: | |
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1987
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| Sorozat: | Acta mineralogica-petrographica
29 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24759 |
| Tartalmi kivonat: | Ultrabasic rocks (harzburgite, wherlite and dunite) occurring in the northeastern Iraqi Zagros thrust zone, contain massive podiform, schliern and accessory type chromites. Aluminium and chromium-rich chromites have been distinguished in the ophiolitic complexes of Mawat and Penjwin Mountains. The first variety was probably originated as cumulite whereas the second one was residuum after partial melting of rising mantle. Fe-rich accessory-type chromite have been found in Bulfat formed as a differentiated product of a large gabbro intrusion. Alteration of chromite is widespread and probably was formed simultaneously with the serpentinization. Reaction between chromite and host rock, initiated by water, resulted the formation of iron-rich rim around chromite grains and chlorite or serpentine, depending on the chromite composition. |
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| Terjedelem/Fizikai jellemzők: | 69-79 |
| ISSN: | 0365-8066 |