首页>
外文会议>Biennial SGA meeting;Quadrennial IAGOD symposium
>Zoned sulphur isotope signatures at the mississippi valley-type touissit bou beker, El abed district, morocco, algeria- evidence for thermochemical sulphate reduction and mixing of sulphur sources
【24h】
Zoned sulphur isotope signatures at the mississippi valley-type touissit bou beker, El abed district, morocco, algeria- evidence for thermochemical sulphate reduction and mixing of sulphur sources
In the Touissit - Bou Beker - El Abed MVT district the distribution of #delta#~(34)S values of the main stage mineraliztion can be essentially interpreted as the result of mixing between a heavy and a light #delta#~(34)S reservior. The results suggest that thermochemical reduction of Triassic sulphate and, possibly, pyrites disseminated in the sedimentary sequence (and/or leaching of basement sulphides) constitute the sources of the two sulphur types. A zonation with #delta#~(34)S values for main stage sphalerite and galena increasing systematically eastwards has been recognized at the district scale. Temperatures calculated from coexisting sphalerite-galena pairs range from 70 deg to 135 deg and are in good agreement with geological and fluid inclusion data.
展开▼
