I think your question is most easily answered by analyzing some samples
from the factory and/or the quarry.
How do you know it is not a BaO interference? Did you compare signals from
both Eu isotopes?
> Dear collegues,
> I have some estuarine sediments with low PAAS-normalized ratio (<1), an
> average (La/Yb)PAAS ratio of 1.46±0.19 and a positive Europium anomaly
> with average value of 1.41±0.26. I know that the 'normal' anomaly in
> sediments is the negative one and it's not an interference from barium
> I have found some references that points to contribution of feldspar or
> granite/granitic gneiss in the enrichment of this element (Ramesh et
> al., 2000 and references therein) but I am not able to performe a
> mineralogy analysis.
> I realised that those sediments are near a portland cement factory that
> uses limestone and marl as raw material from its quarry near by (2 km).
> Could this activity (quarry and/or factory) be the source of this Eu
> Best regards,
> Pedro Brito
> IPMA - Instituto Português do Mar e da Atmosfera
> Division of Environmental Oceanography and Bioprospection
> Rua Alfredo Magalhães Ramalho, 6
> 1495-006 Lisboa, Portugal
> TLF: +351.21.3027070
> FAX: +351.21.3015948
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