@article{10272/13521,
year = {1995},
url = {http://hdl.handle.net/10272/13521},
abstract = {Anomalous high S34S (+39.7 o/oo and +45.5 o/oo) in pyrites from iron-beds in the Urbana Limestone are interpreted as a result of biogenic reduction of pore water sulphate in a system closed to H2S and SO2' and upwards migration o f the remaining aqueous sulphate very depleted in 32S. The iso to p ic compositions of sulphur of pyrites from the Urbana Limestone, as well as those from Bancos Mixtos and Chavera Shales (&4S = +8.3 o/oo and -13.6 o/oo, respectively) are consistent with the sedimentary environment assumed for these formations},
abstract = {Valores S*4S anormalmente altos (+39.7 o/oo and 45.5 o/oo) observados en niveles ricos en magnetita y/o pirita en la Caliza Urbana son interpretados como el resultado de la reducción biogénica del sulfato en fase acuosa en el sedimento, en un sistema cerrado a H2S y SO2' y una migración subsecuente del sulfato acuoso remanente muy empobrecido en 32S. Los valores ^ S observados en piritas de la Caliza Urbana, así como los de aquellas de los Bancos Mixtos y de las Pizarras Chavera son coherentes con el ambiente sedimentario interpretado para estas formaciones},
publisher = {Sociedad Geológica de España},
keywords = {Sulphur isotopes},
keywords = {Pyrite},
keywords = {Magnetite},
keywords = {Iron beds},
keywords = {Urbana Limestone},
title = {High 834S in pyrite from magnetite-rich beds in the Urbana Limestone (eastern Sierra Morena)},
author = {Lillo Bevia, J.},
}