Abstract
In the ophiolite series of N. Oman numerous small and large elongated podiform chromite deposits occur within the peridotite complex at a certain level of 100-200 meters below the layered zone, which grades into the overlying gabbro complex. The chromite grains were corroded after their deposition; their composition shows a large variation in Cr/Al ratio and a small variation in Cr/Fe ratio. The chromium is thought to have been liberated from clino-pyroxenes during partial melting of lherzolitic upper mantle material. Precipitation of large quantities of chromite at the specific level below the gabbro complex is related to the plagioclase- /spinel-lherzolite transition, but the influence of a change in oxygen fugacity is also considered.
| Original language | English |
|---|---|
| Pages (from-to) | 253-259 |
| Number of pages | 7 |
| Journal | Mineralium Deposita |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Sept 1974 |
| Externally published | Yes |
ASJC Scopus subject areas
- Geophysics
- Geochemistry and Petrology
- Economic Geology