TY - GEN
T1 - Arsenic and uranium in the settling particulate matter and sediments of Alfonso Basin, la Paz Bay
AU - Choumiline, K.
AU - Rodríguez-Castañeda, A. P.
AU - Silverberg, N.
AU - Shumilin, E.
AU - Aguirre-Bahena, F.
AU - Sapozhnikov, D.
AU - Pérez-Cruz, L.
PY - 2010
Y1 - 2010
N2 - Arsenic and uranium contents in surface sediments of La Paz Bay, in a sediment core and settling particulate matter collected in Alfonso Basin are presented. Arsenic is most enriched in sediments of the southwestern bay, probably associated with terrigenous supply. Uranium accumulates in sediments of the deeper part of the embayment. The profile of uranium in the core is characterized by higher concentrations near the surface and lower contents below 40 mm. Uranium concentration maximum at 35 mm is probably related to low oxygen in the water column at the deposition time. The contents of As and U in settling particles from 2002-2008 were greatest in late spring-early summer (May-July 2002, 2007 and 2008). The accumulation timing corresponds with the intrusion of oxygen-depleted waters from the Equatorial Pacific Ocean into the Gulf of California. Maximum uranium and arsenic contents in the settling particles coincide with moderate "El Niño" of 2002-2003.
AB - Arsenic and uranium contents in surface sediments of La Paz Bay, in a sediment core and settling particulate matter collected in Alfonso Basin are presented. Arsenic is most enriched in sediments of the southwestern bay, probably associated with terrigenous supply. Uranium accumulates in sediments of the deeper part of the embayment. The profile of uranium in the core is characterized by higher concentrations near the surface and lower contents below 40 mm. Uranium concentration maximum at 35 mm is probably related to low oxygen in the water column at the deposition time. The contents of As and U in settling particles from 2002-2008 were greatest in late spring-early summer (May-July 2002, 2007 and 2008). The accumulation timing corresponds with the intrusion of oxygen-depleted waters from the Equatorial Pacific Ocean into the Gulf of California. Maximum uranium and arsenic contents in the settling particles coincide with moderate "El Niño" of 2002-2003.
UR - http://www.scopus.com/inward/record.url?scp=84860166668&partnerID=8YFLogxK
M3 - Contribución a la conferencia
AN - SCOPUS:84860166668
SN - 9780415604260
T3 - Water-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13
SP - 333
EP - 336
BT - Water-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13
T2 - 13th International Conference on Water-Rock Interaction, WRI-13
Y2 - 16 August 2010 through 20 August 2010
ER -