The distribution of platinum-group and base-metal minerals in the metamorphosed ophiolitic chromitites of the Dobromirtsi ultramafic massif (Rhodope Mountains, SE Bulgaria) show that in the altered zones of chromites and in the silicate matrix between chromite grains, there is an increase in the proportion of Ni-rich, S-poor sulphides and As-rich minerals, relative to the unaltered zones of the chromite. This distribution is interpreted in terms of postmagmatic evolution of the chromitites: Ocean-floor metamorphism followed by hydrothermal alteration, associated with greenschist-amphibolite facies regional metamorphism causing S leaching followed by supply of additional S, As and minor Sb and Sn.
|Title of host publication||Digging Deeper|
|Subtitle of host publication||Proceedings of the 9th Biennial SGA Meeting|
|Place of Publication||Ireland|
|Publisher||Irish Association for Economic Geology|
|Number of pages||4|
|Publication status||Published - 2007|
|Event||Biennial Meeting of the Society for Geology Applied to Mineral Deposits - Dublin, Ireland|
Duration: 20 Aug 2007 → 23 Aug 2007
|Conference||Biennial Meeting of the Society for Geology Applied to Mineral Deposits|
|Period||20/08/07 → 23/08/07|
Gonzalez-Jimenez, J. M., Gervilla, F., Kerestedjian, T., & Proenza, J. A. (2007). Postmagmatic evolution of platinum-group and base-metal mineral assemblages in Palaeozoic ophiolitic chromitites from the Dobromirtsi massif, Rhodope Mountains (SE Bulgaria). In Digging Deeper: Proceedings of the 9th Biennial SGA Meeting (pp. 889-892). Ireland: Irish Association for Economic Geology.